Reptilien / reptiles Archives - One Earth - One Ocean e. V. https://oneearth-oneocean.com/en/category/reptilien-reptiles-en/ Eine weitere WordPress-Website Tue, 20 Dec 2022 21:39:31 +0000 en-US hourly 1 https://wordpress.org/?v=6.5.5 https://oneearth-oneocean.com/wp-content/uploads/2022/08/cropped-oeoo-logo-unterzeile-blau-1-32x32.jpg Reptilien / reptiles Archives - One Earth - One Ocean e. V. https://oneearth-oneocean.com/en/category/reptilien-reptiles-en/ 32 32 Debris ingestion by juvenile marine turtles: An underestimated problem https://oneearth-oneocean.com/en/brazil-en/2015/debris-ingestion-by-juvenile-marine-turtles-an-underestimated-problem/ https://oneearth-oneocean.com/en/brazil-en/2015/debris-ingestion-by-juvenile-marine-turtles-an-underestimated-problem/#respond Fri, 13 Mar 2015 20:27:54 +0000 https://oneearth-oneocean.com/2015/03/13/debris-ingestion-by-juvenile-marine-turtles-an-underestimated-problem/ Robson Guimarães Santos, Ryan Andrades, Marcillo Altoé Boldrini, Agnaldo Silva Martins, Debris ingestion by juvenile marine turtles: An underestimated problem, Marine Pollution Bulletin, Available online 5 March 2015, ISSN 0025-326X, http://dx.doi.org/10.1016/j.marpolbul.2015.02.022. (http://www.sciencedirect.com/science/article/pii/S0025326X15001125) Abstract: Marine turtles are an iconic group of endangered animals threatened by debris ingestion. However, key aspects related to debris ingestion are still poorly known, including its effects on mortality and the original use of the ingested debris. Therefore, we analysed the impact of debris ingestion in 265 green turtles (Chelonia mydas) over a large geographical area and different habitats along the Brazilian coast. We determined the death rate due to debris ingestion and quantified the amount of debris that is sufficient to cause the death of juvenile green turtles. Additionally, we investigated the original use of the ingested debris. We found that a surprisingly small amount of debris was sufficient to block the digestive tract and cause death. We suggested that debris ingestion has a high death potential that may be masked by other causes of death. An expressive part of the ingested debris come from disposable and short-lived products. Keywords: Anthropogenic debris; Chelonia mydas; Debris ingestion; Garbage; Green turtle; Plastic debris

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]]> Robson Guimarães Santos, Ryan Andrades, Marcillo Altoé Boldrini, Agnaldo
Silva Martins, Debris ingestion by juvenile marine turtles: An
underestimated problem, Marine Pollution Bulletin, Available online 5
March 2015, ISSN 0025-326X,
http://dx.doi.org/10.1016/j.marpolbul.2015.02.022.
(http://www.sciencedirect.com/science/article/pii/S0025326X15001125)
Abstract: Marine turtles are an iconic group of endangered animals
threatened by debris ingestion. However, key aspects related to debris
ingestion are still poorly known, including its effects on mortality and
the original use of the ingested debris. Therefore, we analysed the
impact of debris ingestion in 265 green turtles (Chelonia mydas) over a
large geographical area and different habitats along the Brazilian
coast. We determined the death rate due to debris ingestion and
quantified the amount of debris that is sufficient to cause the death of
juvenile green turtles. Additionally, we investigated the original use
of the ingested debris. We found that a surprisingly small amount of
debris was sufficient to block the digestive tract and cause death. We
suggested that debris ingestion has a high death potential that may be
masked by other causes of death. An expressive part of the ingested
debris come from disposable and short-lived products.
Keywords: Anthropogenic debris; Chelonia mydas; Debris ingestion;
Garbage; Green turtle; Plastic debris

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]]> https://oneearth-oneocean.com/en/brazil-en/2015/debris-ingestion-by-juvenile-marine-turtles-an-underestimated-problem/feed/ 0 How marine debris ingestion differs among megafauna species in a tropical coastal area https://oneearth-oneocean.com/en/brazil-en/2014/how-marine-debris-ingestion-differs-among-megafauna-species-in-a-tropical-coastal-area-2/ https://oneearth-oneocean.com/en/brazil-en/2014/how-marine-debris-ingestion-differs-among-megafauna-species-in-a-tropical-coastal-area-2/#respond Wed, 31 Dec 2014 16:15:06 +0000 https://oneearth-oneocean.com/2014/12/31/how-marine-debris-ingestion-differs-among-megafauna-species-in-a-tropical-coastal-area-2/ Ana Paula Madeira Di Beneditto, Danielle Rodrigues Awabdi, How marine debris ingestion differs among megafauna species in a tropical coastal area, Marine Pollution Bulletin, Volume 88, Issues 1?2, 15 November 2014, Pages 86-90, ISSN 0025-326X, http://dx.doi.org/10.1016/j.marpolbul.2014.09.020. (http://www.sciencedirect.com/science/article/pii/S0025326X14006134) Abstract: The marine debris ingested by megafauna species (Trichiurus lepturus, Chelonia mydas, Pontoporia blainvillei, and Sotalia guianensis) was recorded in a coastal area of southeastern Brazil (21?23°S). Marine debris was recorded in all species, mainly consisting of plastic material (flexible and hard plastics ? clear, white, and colored- and nylon filaments). The ?pelagic predators? T. lepturus and S. guianesis showed the lowest percent frequencies of debris ingestion (0.7% and 1.3%, respectively), followed by the ?benthic predator? P. blainvillei (15.7%) and the ?benthic herbivorous C. mydas (59.2%). The debris found in C. mydas stomachs was opportunistically ingested during feeding activities on local macroalgal banks. In the study area, the benthic environment accumulates more anthropogenic debris than the pelagic environment, and benthic/demersal feeders are more susceptible to encounters and ingestion. The sub-lethal effects observed in C. mydas, such as intestinal obstruction due to hardened fecal material, should be considered a local conservation concern. Keywords: Marine debris; Megafauna; Fish; Turtle; Dolphins; Brazilian coastal area

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]]> Ana Paula Madeira Di Beneditto, Danielle Rodrigues Awabdi, How marine debris ingestion differs among megafauna species in a tropical coastal area, Marine Pollution Bulletin, Volume 88, Issues 1?2, 15 November 2014, Pages 86-90, ISSN 0025-326X, http://dx.doi.org/10.1016/j.marpolbul.2014.09.020. (http://www.sciencedirect.com/science/article/pii/S0025326X14006134) Abstract: The marine debris ingested by megafauna species (Trichiurus lepturus, Chelonia mydas, Pontoporia blainvillei, and Sotalia guianensis) was recorded in a coastal area of southeastern Brazil (21?23°S). Marine debris was recorded in all species, mainly consisting of plastic material (flexible and hard plastics ? clear, white, and colored- and nylon filaments). The ?pelagic predators? T. lepturus and S. guianesis showed the lowest percent frequencies of debris ingestion (0.7% and 1.3%, respectively), followed by the ?benthic predator? P. blainvillei (15.7%) and the ?benthic herbivorous C. mydas (59.2%). The debris found in C. mydas stomachs was opportunistically ingested during feeding activities on local macroalgal banks. In the study area, the benthic environment accumulates more anthropogenic debris than the pelagic environment, and benthic/demersal feeders are more susceptible to encounters and ingestion. The sub-lethal effects observed in C. mydas, such as intestinal obstruction due to hardened fecal material, should be considered a local conservation concern. Keywords: Marine debris; Megafauna; Fish; Turtle; Dolphins; Brazilian coastal area

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]]> https://oneearth-oneocean.com/en/brazil-en/2014/how-marine-debris-ingestion-differs-among-megafauna-species-in-a-tropical-coastal-area-2/feed/ 0 How marine debris ingestion differs among megafauna species in a tropical coastal area https://oneearth-oneocean.com/en/brazil-en/2014/how-marine-debris-ingestion-differs-among-megafauna-species-in-a-tropical-coastal-area/ https://oneearth-oneocean.com/en/brazil-en/2014/how-marine-debris-ingestion-differs-among-megafauna-species-in-a-tropical-coastal-area/#respond Thu, 25 Sep 2014 17:58:32 +0000 https://oneearth-oneocean.com/2014/09/25/how-marine-debris-ingestion-differs-among-megafauna-species-in-a-tropical-coastal-area/ Ana Paula Madeira Di Beneditto, Danielle Rodrigues Awabdi, How marine debris ingestion differs among megafauna species in a tropical coastal area, Marine Pollution Bulletin, Available online 23 September 2014, ISSN 0025-326X, http://dx.doi.org/10.1016/j.marpolbul.2014.09.020. (http://www.sciencedirect.com/science/article/pii/S0025326X14006134) Abstract: The marine debris ingested by megafauna species (Trichiurus lepturus, Chelonia mydas, Pontoporia blainvillei, and Sotalia guianensis) was recorded in a coastal area of southeastern Brazil (21?23°S). Marine debris was recorded in all species, mainly consisting of plastic material (flexible and hard plastics ? clear, white, and colored- and nylon filaments). The ?pelagic predators? T. lepturus and S. guianesis showed the lowest percent frequencies of debris ingestion (0.7% and 1.3%, respectively), followed by the ?benthic predator? P. blainvillei (15.7%) and the ?benthic herbivorous C. mydas (59.2%). The debris found in C. mydas stomachs was opportunistically ingested during feeding activities on local macroalgal banks. In the study area, the benthic environment accumulates more anthropogenic debris than the pelagic environment, and benthic/demersal feeders are more susceptible to encounters and ingestion. The sub-lethal effects observed in C. mydas, such as intestinal obstruction due to hardened fecal material, should be considered a local conservation concern. Keywords: Marine debris; Megafauna; Fish; Turtle; Dolphins; Brazilian coastal area

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]]> Ana Paula Madeira Di Beneditto, Danielle Rodrigues Awabdi, How marine debris ingestion differs among megafauna species in a tropical coastal area, Marine Pollution Bulletin, Available online 23 September 2014, ISSN 0025-326X, http://dx.doi.org/10.1016/j.marpolbul.2014.09.020. (http://www.sciencedirect.com/science/article/pii/S0025326X14006134) Abstract: The marine debris ingested by megafauna species (Trichiurus lepturus, Chelonia mydas, Pontoporia blainvillei, and Sotalia guianensis) was recorded in a coastal area of southeastern Brazil (21?23°S). Marine debris was recorded in all species, mainly consisting of plastic material (flexible and hard plastics ? clear, white, and colored- and nylon filaments). The ?pelagic predators? T. lepturus and S. guianesis showed the lowest percent frequencies of debris ingestion (0.7% and 1.3%, respectively), followed by the ?benthic predator? P. blainvillei (15.7%) and the ?benthic herbivorous C. mydas (59.2%). The debris found in C. mydas stomachs was opportunistically ingested during feeding activities on local macroalgal banks. In the study area, the benthic environment accumulates more anthropogenic debris than the pelagic environment, and benthic/demersal feeders are more susceptible to encounters and ingestion. The sub-lethal effects observed in C. mydas, such as intestinal obstruction due to hardened fecal material, should be considered a local conservation concern. Keywords: Marine debris; Megafauna; Fish; Turtle; Dolphins; Brazilian coastal area

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]]> https://oneearth-oneocean.com/en/brazil-en/2014/how-marine-debris-ingestion-differs-among-megafauna-species-in-a-tropical-coastal-area/feed/ 0 Understanding the Sources and Effects of Abandoned, Lost, and Discarded Fishing Gear on Marine Turtles in Northern Australia https://oneearth-oneocean.com/en/research-en/2014/understanding-the-sources-and-effects-of-abandoned-lost-and-discarded-fishing-gear-on-marine-turtles-in-northern-australia/ https://oneearth-oneocean.com/en/research-en/2014/understanding-the-sources-and-effects-of-abandoned-lost-and-discarded-fishing-gear-on-marine-turtles-in-northern-australia/#respond Thu, 14 Aug 2014 19:10:10 +0000 https://oneearth-oneocean.com/2014/08/14/understanding-the-sources-and-effects-of-abandoned-lost-and-discarded-fishing-gear-on-marine-turtles-in-northern-australia/ http://onlinelibrary.wiley.com/doi/10.1111/cobi.12355/abstract WILCOX, C., HEATHCOTE, G., GOLDBERG, J., GUNN, R., PEEL, D. and HARDESTY, B. D. (2014), Understanding the Sources and Effects of Abandoned, Lost, and Discarded Fishing Gear on Marine Turtles in Northern Australia. Conservation Biology. doi: 10.1111/cobi.12355 Abstract Globally, 6.4 million tons of fishing gear are lost in the oceans annually. This gear (i.e., ghost nets), whether accidently lost, abandoned, or deliberately discarded, threatens marine wildlife as it drifts with prevailing currents and continues to entangle marine organisms indiscriminately. Northern Australia has some of the highest densities of ghost nets in the world, with up to 3 tons washing ashore per kilometer of shoreline annually. This region supports globally significant populations of internationally threatened marine fauna, including 6 of the 7 extant marine turtles. We examined the threat ghost nets pose to marine turtles and assessed whether nets associated with particular fisheries are linked with turtle entanglement by analyzing the capture rates of turtles and potential source fisheries from nearly 9000 nets found on Australia's northern coast. Nets with relatively larger mesh and smaller twine sizes (e.g., pelagic drift nets) had the highest probability of entanglement for marine turtles. Net size was important; larger nets appeared to attract turtles, which further increased their catch rates. Our results point to issues with trawl and drift-net fisheries, the former due to the large number of nets and fragments found and the latter due to the very high catch rates resulting from the net design. Catch rates for fine-mesh gill nets can reach as high as 4 turtles/100 m of net length. We estimated that the total number of turtles caught by the 8690 ghost nets we sampled was between 4866 and 14,600, assuming nets drift for 1 year. Ghost nets continue to accumulate on Australia's northern shore due to both legal and illegal fishing; over 13,000 nets have been removed since 2005. This is an important and ongoing transboundary threat to biodiversity in the region that requires attention from the countries surrounding the Arafura and Timor Seas. http://onlinelibrary.wiley.com/doi/10.1111/cobi.12355/suppinfo Disclaimer: Supplementary materials have been peer-reviewed but not copyedited. http://onlinelibrary.wiley.com/store/10.1111/cobi.12355/asset/supinfo/cobi12355-sup-0001-SupMat.docx?v=1&s=bbdd128d52aa28153b8fe2a594bf41504b8d7270 http://onlinelibrary.wiley.com/journal/10.1111/(ISSN)1523-1739/earlyview Early View (Online Version of Record published before inclusion in an issue)

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]]> 
http://onlinelibrary.wiley.com/doi/10.1111/cobi.12355/abstract

WILCOX, C., HEATHCOTE, G., GOLDBERG, J., GUNN, R., PEEL, D. and
HARDESTY, B. D. (2014), Understanding the Sources and Effects of
Abandoned, Lost, and Discarded Fishing Gear on Marine Turtles in
Northern Australia. Conservation Biology. doi: 10.1111/cobi.12355

Abstract
Globally, 6.4 million tons of fishing gear are lost in the oceans
annually. This gear (i.e., ghost nets), whether accidently lost,
abandoned, or deliberately discarded, threatens marine wildlife as it
drifts with prevailing currents and continues to entangle marine
organisms indiscriminately. Northern Australia has some of the highest
densities of ghost nets in the world, with up to 3 tons washing ashore
per kilometer of shoreline annually. This region supports globally
significant populations of internationally threatened marine fauna,
including 6 of the 7 extant marine turtles. We examined the threat ghost
nets pose to marine turtles and assessed whether nets associated with
particular fisheries are linked with turtle entanglement by analyzing
the capture rates of turtles and potential source fisheries from nearly
9000 nets found on Australia's northern coast. Nets with relatively
larger mesh and smaller twine sizes (e.g., pelagic drift nets) had the
highest probability of entanglement for marine turtles. Net size was
important; larger nets appeared to attract turtles, which further
increased their catch rates. Our results point to issues with trawl and
drift-net fisheries, the former due to the large number of nets and
fragments found and the latter due to the very high catch rates
resulting from the net design. Catch rates for fine-mesh gill nets can
reach as high as 4 turtles/100 m of net length. We estimated that the
total number of turtles caught by the 8690 ghost nets we sampled was
between 4866 and 14,600, assuming nets drift for 1 year. Ghost nets
continue to accumulate on Australia's northern shore due to both legal
and illegal fishing; over 13,000 nets have been removed since 2005. This
is an important and ongoing transboundary threat to biodiversity in the
region that requires attention from the countries surrounding the
Arafura and Timor Seas.

http://onlinelibrary.wiley.com/doi/10.1111/cobi.12355/suppinfo

Disclaimer: Supplementary materials have been peer-reviewed but not
copyedited.

http://onlinelibrary.wiley.com/store/10.1111/cobi.12355/asset/supinfo/cobi12355-sup-0001-SupMat.docx?v=1&s=bbdd128d52aa28153b8fe2a594bf41504b8d7270

http://onlinelibrary.wiley.com/journal/10.1111/(ISSN)1523-1739/earlyview

Early View (Online Version of Record published before inclusion in an issue)

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]]> https://oneearth-oneocean.com/en/research-en/2014/understanding-the-sources-and-effects-of-abandoned-lost-and-discarded-fishing-gear-on-marine-turtles-in-northern-australia/feed/ 0 What We Know About Entanglement and Ingestion https://oneearth-oneocean.com/en/seabirds-en/2014/what-we-know-about-entanglement-and-ingestion/ https://oneearth-oneocean.com/en/seabirds-en/2014/what-we-know-about-entanglement-and-ingestion/#respond Tue, 12 Aug 2014 21:00:10 +0000 https://oneearth-oneocean.com/2014/08/12/what-we-know-about-entanglement-and-ingestion/ http://marinedebris.noaa.gov/research-impacts/what-we-know-about-entanglement-and-ingestion What We Know About Entanglement and Ingestion New NOAA reports sum up the state of science on entanglement and ingestion. AUGUST 8, 2014 -- The NOAA Marine Debris Program, in partnership with the National Centers for Coastal Ocean Science, published reports today that assess the current state of science on two marine debris impacts: ingestion and entanglement. The reports examine existing scientific literature to determine what we know about these impacts, as well as gaps in knowledge and how they may be addressed. Reports Entanglement of Marine Species in Marine Debris with an Emphasis on Species in the United States From reports in the United States, at least 115 marine species are impacted by entanglement, including mammals, turtles, birds, fish, and crabs. Most marine debris entanglement reports involved pinnipeds, particularly northern fur seals and Hawaiian monk seals, as well as sea turtles. Worldwide, at least 200 species are impacted. Occurrence of Health Effects of Anthropogenic Debris Ingested by Marine Organisms An estimated 26 marine mammal species, including toothed whales, manatees, and multiple seal species, as well as all sea turtle species have been confirmed to ingest marine debris. Over one-third of sea bird species ingest plastic. Research to-date has characterized the types, sources and impacts of ingestible debris, yet the overall effects on animals remain poorly understood. http://marinedebris.noaa.gov/sites/default/files/mdp_entanglement_topic_paper.pdf http://marinedebris.noaa.gov/sites/default/files/mdp_ingestion_topic_paper.pdf

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]]> http://marinedebris.noaa.gov/research-impacts/what-we-know-about-entanglement-and-ingestion What We Know About Entanglement and Ingestion New NOAA reports sum up the state of science on entanglement and ingestion. AUGUST 8, 2014 -- The NOAA Marine Debris Program, in partnership with the National Centers for Coastal Ocean Science, published reports today that assess the current state of science on two marine debris impacts: ingestion and entanglement. The reports examine existing scientific literature to determine what we know about these impacts, as well as gaps in knowledge and how they may be addressed. Reports Entanglement of Marine Species in Marine Debris with an Emphasis on Species in the United States From reports in the United States, at least 115 marine species are impacted by entanglement, including mammals, turtles, birds, fish, and crabs. Most marine debris entanglement reports involved pinnipeds, particularly northern fur seals and Hawaiian monk seals, as well as sea turtles. Worldwide, at least 200 species are impacted. Occurrence of Health Effects of Anthropogenic Debris Ingested by Marine Organisms An estimated 26 marine mammal species, including toothed whales, manatees, and multiple seal species, as well as all sea turtle species have been confirmed to ingest marine debris. Over one-third of sea bird species ingest plastic. Research to-date has characterized the types, sources and impacts of ingestible debris, yet the overall effects on animals remain poorly understood. http://marinedebris.noaa.gov/sites/default/files/mdp_entanglement_topic_paper.pdf http://marinedebris.noaa.gov/sites/default/files/mdp_ingestion_topic_paper.pdf

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]]> https://oneearth-oneocean.com/en/seabirds-en/2014/what-we-know-about-entanglement-and-ingestion/feed/ 0 Mistaken identity? Visual similarities of marine debris to natural prey items of sea turtles https://oneearth-oneocean.com/en/research-en/2014/mistaken-identity-visual-similarities-of-marine-debris-to-natural-prey-items-of-sea-turtles/ https://oneearth-oneocean.com/en/research-en/2014/mistaken-identity-visual-similarities-of-marine-debris-to-natural-prey-items-of-sea-turtles/#respond Wed, 16 Jul 2014 20:08:42 +0000 https://oneearth-oneocean.com/2014/07/16/mistaken-identity-visual-similarities-of-marine-debris-to-natural-prey-items-of-sea-turtles/ http://www.biomedcentral.com/1472-6785/14/14 Qamar A Schuyler, Chris Wilcox, Kathy Townsend, B Hardesty, N Marshall Mistaken identity? Visual similarities of marine debris to natural prey items of sea turtles BMC Ecology 2014, 14:14 (9 May 2014) doi:10.1186/1472-6785-14-14 Abstract Background There are two predominant hypotheses as to why animals ingest plastic: 1) they are opportunistic feeders, eating plastic when they encounter it, and 2) they eat plastic because it resembles prey items. To assess which hypothesis is most likely, we created a model sea turtle visual system and used it to analyse debris samples from beach surveys and from necropsied turtles. We investigated colour, contrast, and luminance of the debris items as they would appear to the turtle. We also incorporated measures of texture and translucency to determine which of the two hypotheses is more plausible as a driver of selectivity in green sea turtles. Results Turtles preferred more flexible and translucent items to what was available in the environment, lending support to the hypothesis that they prefer debris that resembles prey, particularly jellyfish. They also ate fewer blue items, suggesting that such items may be less conspicuous against the background of open water where they forage. Conclusions Using visual modelling we determined the characteristics that drive ingestion of marine debris by sea turtles, from the point of view of the turtles themselves. This technique can be utilized to determine debris preferences of other visual predators, and help to more effectively focus management or remediation actions. Keywords: Chelonia mydas; Chromatic space; Eretmochelys imbricata; Marine debris; Vorobyev-Osorio model http://www.biomedcentral.com/content/pdf/1472-6785-14-14.pdf http://www.biomedcentral.com/content/epub/1472-6785-14-14.epub

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]]> http://www.biomedcentral.com/1472-6785/14/14 Qamar A Schuyler, Chris Wilcox, Kathy Townsend, B Hardesty, N Marshall Mistaken identity? Visual similarities of marine debris to natural prey items of sea turtles BMC Ecology 2014, 14:14 (9 May 2014) doi:10.1186/1472-6785-14-14 Abstract Background There are two predominant hypotheses as to why animals ingest plastic: 1) they are opportunistic feeders, eating plastic when they encounter it, and 2) they eat plastic because it resembles prey items. To assess which hypothesis is most likely, we created a model sea turtle visual system and used it to analyse debris samples from beach surveys and from necropsied turtles. We investigated colour, contrast, and luminance of the debris items as they would appear to the turtle. We also incorporated measures of texture and translucency to determine which of the two hypotheses is more plausible as a driver of selectivity in green sea turtles. Results Turtles preferred more flexible and translucent items to what was available in the environment, lending support to the hypothesis that they prefer debris that resembles prey, particularly jellyfish. They also ate fewer blue items, suggesting that such items may be less conspicuous against the background of open water where they forage. Conclusions Using visual modelling we determined the characteristics that drive ingestion of marine debris by sea turtles, from the point of view of the turtles themselves. This technique can be utilized to determine debris preferences of other visual predators, and help to more effectively focus management or remediation actions. Keywords: Chelonia mydas; Chromatic space; Eretmochelys imbricata; Marine debris; Vorobyev-Osorio model http://www.biomedcentral.com/content/pdf/1472-6785-14-14.pdf http://www.biomedcentral.com/content/epub/1472-6785-14-14.epub

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]]> https://oneearth-oneocean.com/en/research-en/2014/mistaken-identity-visual-similarities-of-marine-debris-to-natural-prey-items-of-sea-turtles/feed/ 0 Helping Sea Turtles Never See Marine Debris https://oneearth-oneocean.com/en/nonresearch-en/2014/helping-sea-turtles-never-see-marine-debris/ https://oneearth-oneocean.com/en/nonresearch-en/2014/helping-sea-turtles-never-see-marine-debris/#respond Fri, 21 Mar 2014 13:57:17 +0000 https://oneearth-oneocean.com/2014/03/21/helping-sea-turtles-never-see-marine-debris/ http://blog.oceanconservancy.org/2014/03/19/helping-sea-turtles-never-see-marine-debris/ Helping Sea Turtles Never See Marine Debris Posted On March 19, 2014 by Allison Schutes Let’s face it, sea turtles could use a helping hand.. Did you know that most species of sea turtles are listed as Endangered or Critically Endangered by the International Union for Conservation of Nature (IUCN)? Marine debris is a major threat to sea turtle’s survival. Mistaking trash for food, sea turtles are known to eat plastics and other buoyant debris. Trash can also hinder sea turtles ability to swim, and they’re prone to getting entangled in abandoned lines and netting.[1] Young sea turtles are especially vulnerable to marine debris. The turtle hatchlings quickly drift in the open sea where they mistake lines of floating debris for seaweed.[2] Unfortunately, cleaning up debris throughout the entire ocean is an impractical task—there’s just too much of it! But, don’t despair; we have had success removing ocean debris on our beaches, where the sea turtles hatch from their eggs before crawling across the sand to the sea.

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]]> http://blog.oceanconservancy.org/2014/03/19/helping-sea-turtles-never-see-marine-debris/ Helping Sea Turtles Never See Marine Debris Posted On March 19, 2014 by Allison Schutes Let’s face it, sea turtles could use a helping hand.. Did you know that most species of sea turtles are listed as Endangered or Critically Endangered by the International Union for Conservation of Nature (IUCN)? Marine debris is a major threat to sea turtle’s survival. Mistaking trash for food, sea turtles are known to eat plastics and other buoyant debris. Trash can also hinder sea turtles ability to swim, and they’re prone to getting entangled in abandoned lines and netting.[1] Young sea turtles are especially vulnerable to marine debris. The turtle hatchlings quickly drift in the open sea where they mistake lines of floating debris for seaweed.[2] Unfortunately, cleaning up debris throughout the entire ocean is an impractical task—there’s just too much of it! But, don’t despair; we have had success removing ocean debris on our beaches, where the sea turtles hatch from their eggs before crawling across the sand to the sea.

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]]> https://oneearth-oneocean.com/en/nonresearch-en/2014/helping-sea-turtles-never-see-marine-debris/feed/ 0 Monitoring the impact of litter in large vertebrates in the Mediterranean Sea within the European Marine Strategy Framework Directive (MSFD): constraints, specificities and recommendations https://oneearth-oneocean.com/en/research-en/2014/monitoring-the-impact-of-litter-in-large-vertebrates-in-the-mediterranean-sea-within-the-european-marine-strategy-framework-directive-msfd-constraints-specificities-and-recommendations/ https://oneearth-oneocean.com/en/research-en/2014/monitoring-the-impact-of-litter-in-large-vertebrates-in-the-mediterranean-sea-within-the-european-marine-strategy-framework-directive-msfd-constraints-specificities-and-recommendations/#respond Sat, 15 Mar 2014 16:05:11 +0000 https://oneearth-oneocean.com/2014/03/15/monitoring-the-impact-of-litter-in-large-vertebrates-in-the-mediterranean-sea-within-the-european-marine-strategy-framework-directive-msfd-constraints-specificities-and-recommendations/ F. Galgani, F. Claro, M. Depledge, C. Fossi, Monitoring the impact of litter in large vertebrates in the Mediterranean Sea within the European Marine Strategy Framework Directive (MSFD): constraints, specificities and recommendations, Marine Environmental Research, Available online 24 February 2014, ISSN 0141-1136, http://dx.doi.org/10.1016/j.marenvres.2014.02.003. (http://www.sciencedirect.com/science/article/pii/S0141113614000385) Abstract: In its decision (2010/477/EU) relating to the European Marine Strategy Framework Directive (MSFD, 2008/56/EC), the European Commission identified the following points as focuses for monitoring: (i) 10.1.1: Trends in the amount, source and composition of litter washed ashore and/or deposited on coastlines, (ii) 10.1.2: Trends in the amount and composition of litter in the water column and accumulation on the sea floor, (iii) 10.1.3: Trends in the amount, distribution and composition of micro-particles (mainly microplastics), and (iv) 10.2.1 Trends in the amount and composition of litter ingested by marine animals. Monitoring the impacts of litter will be considered further in 2014. At that time, the strategy will be discussed in the context of the Mediterranean Sea, providing information on constraints, protocols, existing harm and research needed to support monitoring efforts. The definition of targets and acceptable levels of harm must take all factors into account, whether entanglement, ingestion, the transport and release of pollutants, the transport of alien species and socio-economic impacts. It must also reflect on the practical deployment of "ingestion" measures (10.2.1). The analysis of existing data will reveal the potential and suitability of some higher trophic level organisms (fish, turtles, birds and mammals) for monitoring the adverse effects of litter. Sea turtles appear to be useful indicator species, but the definition of an ecological quality objective is still needed, as well as research on alternative potential indicator species. Keywords: Marine litter; MSFD; Good Environmental Status; monitoring; sea turtles; marine mammals; seabirds; Fulmar

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]]> F. Galgani, F. Claro, M. Depledge, C. Fossi, Monitoring the impact of litter in large vertebrates in the Mediterranean Sea within the European Marine Strategy Framework Directive (MSFD): constraints, specificities and recommendations, Marine Environmental Research, Available online 24 February 2014, ISSN 0141-1136, http://dx.doi.org/10.1016/j.marenvres.2014.02.003. (http://www.sciencedirect.com/science/article/pii/S0141113614000385) Abstract: In its decision (2010/477/EU) relating to the European Marine Strategy Framework Directive (MSFD, 2008/56/EC), the European Commission identified the following points as focuses for monitoring: (i) 10.1.1: Trends in the amount, source and composition of litter washed ashore and/or deposited on coastlines, (ii) 10.1.2: Trends in the amount and composition of litter in the water column and accumulation on the sea floor, (iii) 10.1.3: Trends in the amount, distribution and composition of micro-particles (mainly microplastics), and (iv) 10.2.1 Trends in the amount and composition of litter ingested by marine animals. Monitoring the impacts of litter will be considered further in 2014. At that time, the strategy will be discussed in the context of the Mediterranean Sea, providing information on constraints, protocols, existing harm and research needed to support monitoring efforts. The definition of targets and acceptable levels of harm must take all factors into account, whether entanglement, ingestion, the transport and release of pollutants, the transport of alien species and socio-economic impacts. It must also reflect on the practical deployment of "ingestion" measures (10.2.1). The analysis of existing data will reveal the potential and suitability of some higher trophic level organisms (fish, turtles, birds and mammals) for monitoring the adverse effects of litter. Sea turtles appear to be useful indicator species, but the definition of an ecological quality objective is still needed, as well as research on alternative potential indicator species. Keywords: Marine litter; MSFD; Good Environmental Status; monitoring; sea turtles; marine mammals; seabirds; Fulmar

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]]> https://oneearth-oneocean.com/en/research-en/2014/monitoring-the-impact-of-litter-in-large-vertebrates-in-the-mediterranean-sea-within-the-european-marine-strategy-framework-directive-msfd-constraints-specificities-and-recommendations/feed/ 0 Fishery gear interactions from stranded bottlenose dolphins, Florida manatees and sea turtles in Florida, U.S.A, https://oneearth-oneocean.com/en/research-en/2014/fishery-gear-interactions-from-stranded-bottlenose-dolphins-florida-manatees-and-sea-turtles-in-florida-u-s-a/ https://oneearth-oneocean.com/en/research-en/2014/fishery-gear-interactions-from-stranded-bottlenose-dolphins-florida-manatees-and-sea-turtles-in-florida-u-s-a/#respond Sat, 15 Mar 2014 15:55:56 +0000 https://oneearth-oneocean.com/2014/03/15/fishery-gear-interactions-from-stranded-bottlenose-dolphins-florida-manatees-and-sea-turtles-in-florida-u-s-a/ Nicole M. Adimey, Christine A. Hudak, Jessica R. Powell, Kim Bassos-Hull, Allen Foley, Nicholas A. Farmer, Linda White, Karrie Minch, Fishery gear interactions from stranded bottlenose dolphins, Florida manatees and sea turtles in Florida, U.S.A, Marine Pollution Bulletin, Available online 6 March 2014, ISSN 0025-326X, http://dx.doi.org/10.1016/j.marpolbul.2014.02.008. (http://www.sciencedirect.com/science/article/pii/S0025326X14000897) Abstract: Documenting the extent of fishery gear interactions is critical to wildlife conservation efforts, especially for reducing entanglements and ingestion. This study summarizes fishery gear interactions involving common bottlenose dolphins (Tursiops truncatus truncatus), Florida manatees (Trichechus manatus latirostris) and sea turtles: loggerhead (Caretta caretta), green turtle (Chelonia mydas), leatherback (Dermochelys coriacea), hawksbill (Eretmochelys imbricata), Kemp&rsquo;s ridley (Lepidochelys kempii), and olive ridley (Lepidochelys olivacea) stranding in Florida waters during 1997&ndash;2009. Fishery gear interactions for all species combined were 75.3% hook and line, 18.2% trap pot gear, 4.8% fishing nets, and 1.7% in multiple gears. Total reported fishery gear cases increased over time for dolphins (p < 0.05), manatees (p < 0.01), loggerheads (p < 0.05) and green sea turtles (p

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]]> Nicole M. Adimey, Christine A. Hudak, Jessica R. Powell, Kim Bassos-Hull, Allen Foley, Nicholas A. Farmer, Linda White, Karrie Minch, Fishery gear interactions from stranded bottlenose dolphins, Florida manatees and sea turtles in Florida, U.S.A, Marine Pollution Bulletin, Available online 6 March 2014, ISSN 0025-326X, http://dx.doi.org/10.1016/j.marpolbul.2014.02.008. (http://www.sciencedirect.com/science/article/pii/S0025326X14000897) Abstract: Documenting the extent of fishery gear interactions is critical to wildlife conservation efforts, especially for reducing entanglements and ingestion. This study summarizes fishery gear interactions involving common bottlenose dolphins (Tursiops truncatus truncatus), Florida manatees (Trichechus manatus latirostris) and sea turtles: loggerhead (Caretta caretta), green turtle (Chelonia mydas), leatherback (Dermochelys coriacea), hawksbill (Eretmochelys imbricata), Kemp&rsquo;s ridley (Lepidochelys kempii), and olive ridley (Lepidochelys olivacea) stranding in Florida waters during 1997&ndash;2009. Fishery gear interactions for all species combined were 75.3% hook and line, 18.2% trap pot gear, 4.8% fishing nets, and 1.7% in multiple gears. Total reported fishery gear cases increased over time for dolphins (p < 0.05), manatees (p < 0.01), loggerheads (p < 0.05) and green sea turtles (p

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]]> https://oneearth-oneocean.com/en/research-en/2014/fishery-gear-interactions-from-stranded-bottlenose-dolphins-florida-manatees-and-sea-turtles-in-florida-u-s-a/feed/ 0 Interaction between loggerhead sea turtles (Caretta caretta) and marine litter in Sardinia (Western Mediterranean Sea) https://oneearth-oneocean.com/en/research-en/2014/interaction-between-loggerhead-sea-turtles-caretta-caretta-and-marine-litter-in-sardinia-western-mediterranean-sea/ https://oneearth-oneocean.com/en/research-en/2014/interaction-between-loggerhead-sea-turtles-caretta-caretta-and-marine-litter-in-sardinia-western-mediterranean-sea/#respond Sun, 02 Mar 2014 15:24:58 +0000 https://oneearth-oneocean.com/2014/03/02/interaction-between-loggerhead-sea-turtles-caretta-caretta-and-marine-litter-in-sardinia-western-mediterranean-sea/ Andrea Camedda, Stefano Marra, Marco Matiddi, Giorgio Massaro, Stefania Coppa, Angelo Perilli, Angelo Ruiu, Paolo Briguglio, G. Andrea de Lucia, Interaction between loggerhead sea turtles (Caretta caretta) and marine litter in Sardinia (Western Mediterranean Sea), Marine Environmental Research, Available online 21 December 2013, ISSN 0141-1136, http://dx.doi.org/10.1016/j.marenvres.2013.12.004. (http://www.sciencedirect.com/science/article/pii/S014111361300216X) Abstract: Anthropogenic debris in the environment affects many species that accidentally ingest it. The aim of this study is to evaluate the quantity and composition of marine litter ingested by loggerheads in Sardinia, thus supplying for the lack of data in the existing literature for this area. Seventeen of the 121 (14.04%) monitored turtles presented debris in their digestive tracts. Litter in faecal pellet of alive individuals (n = 91) and in gastro-intestinal contents of dead ones (n = 30) was categorized, counted and weighed. User plastic was the main category of ingested debris with a frequency of occurrence of 13.22% of the total sample, while sheet (12.39%) and fragments (9.09%) were the most relevant sub-categories. This study highlights for the first time the incidence of litter in alive turtles in Sardinia. This contribution improves the knowledge about marine litter interaction on Caretta caretta as bio-indicator. Results will be useful for the Marine Strategy implementation. https://mail.noris.net/src/download.php?startMessage=16&passed_id=16&mailbox=Texte&ent_id=14.4&passed_ent_id=14

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]]> Andrea Camedda, Stefano Marra, Marco Matiddi, Giorgio Massaro, Stefania Coppa, Angelo Perilli, Angelo Ruiu, Paolo Briguglio, G. Andrea de Lucia, Interaction between loggerhead sea turtles (Caretta caretta) and marine litter in Sardinia (Western Mediterranean Sea), Marine Environmental Research, Available online 21 December 2013, ISSN 0141-1136, http://dx.doi.org/10.1016/j.marenvres.2013.12.004. (http://www.sciencedirect.com/science/article/pii/S014111361300216X) Abstract: Anthropogenic debris in the environment affects many species that accidentally ingest it. The aim of this study is to evaluate the quantity and composition of marine litter ingested by loggerheads in Sardinia, thus supplying for the lack of data in the existing literature for this area. Seventeen of the 121 (14.04%) monitored turtles presented debris in their digestive tracts. Litter in faecal pellet of alive individuals (n = 91) and in gastro-intestinal contents of dead ones (n = 30) was categorized, counted and weighed. User plastic was the main category of ingested debris with a frequency of occurrence of 13.22% of the total sample, while sheet (12.39%) and fragments (9.09%) were the most relevant sub-categories. This study highlights for the first time the incidence of litter in alive turtles in Sardinia. This contribution improves the knowledge about marine litter interaction on Caretta caretta as bio-indicator. Results will be useful for the Marine Strategy implementation. https://mail.noris.net/src/download.php?startMessage=16&passed_id=16&mailbox=Texte&ent_id=14.4&passed_ent_id=14

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]]> https://oneearth-oneocean.com/en/research-en/2014/interaction-between-loggerhead-sea-turtles-caretta-caretta-and-marine-litter-in-sardinia-western-mediterranean-sea/feed/ 0