Fishery discards and incidental mortality of seabirds attending coastal shrimp trawlers at Isla Escondida, Patagonia, Argentina

We evaluated seabird attendance and incidental mortality at coastal trawl vessels targeting Argentine red shrimp (Pleoticus muelleri) in the Isla Escondida fishing area, Argentina, during 2006-2007 and 2007-2008. Eight seabird species attended vessels, and the most frequent and abundant seabird (per...

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Published in:The Wilson Journal of Ornithology
Main Authors: Marinao, Cristian Javier, Yorio, Pablo Martin
Format: Article in Journal/Newspaper
Language:English
Published: Wilson Ornithological Society
Subjects:
Online Access:http://hdl.handle.net/11336/81910
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spelling ftconicet:oai:ri.conicet.gov.ar:11336/81910 2023-10-09T21:52:54+02:00 Fishery discards and incidental mortality of seabirds attending coastal shrimp trawlers at Isla Escondida, Patagonia, Argentina Marinao, Cristian Javier Yorio, Pablo Martin application/pdf http://hdl.handle.net/11336/81910 eng eng Wilson Ornithological Society info:eu-repo/semantics/altIdentifier/doi/10.1676/11-023.1 info:eu-repo/semantics/altIdentifier/url/https://bioone.org/journals/the-wilson-journal-of-ornithology/volume-123/issue-4/11-023.1/Fishery-Discards-and-Incidental-Mortality-of-Seabirds-Attending-Coastal-Shrimp/10.1676/11-023.1.short http://hdl.handle.net/11336/81910 Marinao, Cristian Javier; Yorio, Pablo Martin; Fishery discards and incidental mortality of seabirds attending coastal shrimp trawlers at Isla Escondida, Patagonia, Argentina; Wilson Ornithological Society; Wilson Journal of Ornithology; 123; 4; 12-2011; 709-719 1559-4491 1938-5447 CONICET Digital CONICET info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ Seabirdfishery Interactions Discards Incidental Mortality Trawl Fisheries https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion ftconicet https://doi.org/10.1676/11-023.1 2023-09-24T20:12:59Z We evaluated seabird attendance and incidental mortality at coastal trawl vessels targeting Argentine red shrimp (Pleoticus muelleri) in the Isla Escondida fishing area, Argentina, during 2006-2007 and 2007-2008. Eight seabird species attended vessels, and the most frequent and abundant seabird (percent occurrence, mean number per haul) in the two seasons was the Kelp Gull (Larus dominicanus) (100%, 112.3 and 100%, 263.4, respectively), followed by the Black-browed Albatross (Thalassarche melanophris) (85%, 17.6, and 90%, 32.4, respectively). Eleven Magellanic Penguins (Spheniscus magellanicus) and one Imperial Shag (Leucocarbo atriceps) were killed in nets with a mean capture rate of 0.003 and 0.0003 birds per haul, respectively. The estimated total number of birds killed was 53 penguins and five shags considering the total number of hauls made by the fishery in the two seasons. No contacts between seabirds and warp cables were recorded. Coastal shrimp vessels generally operated between 15 and 20 km offshore, at a mean distance from the main Kelp Gull colony (Punta Tombo) of 43.9 km. At least 100 fish and invertebrate species were discarded, mostly Argentine hake (Merluccius hubbsi). Total amount discarded per season by this coastal fishery in the two seasons was estimated at 3,284 and 6,590 tonnes, respectively. The coastal shrimp fishery in the Isla Escondida area appears to have a small impact on seabirds in terms of incidental mortality but provides significant amounts of supplementary food during the breeding season of the Kelp Gull. Fil: Marinao, Cristian Javier. Universidad Nacional de la Patagonia "San Juan Bosco". Facultad de Ciencias Naturales - Sede Trelew; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Yorio, Pablo Martin. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; Argentina. Wildlife Conservation Society; Estados Unidos Article in Journal/Newspaper Imperial Shag CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) Patagonia San Juan Argentina Argentine Hake ENVELOPE(15.612,15.612,66.797,66.797) Pablo ENVELOPE(-63.717,-63.717,-64.283,-64.283) Escondida ENVELOPE(-63.750,-63.750,-65.050,-65.050) The Wilson Journal of Ornithology 123 4 709 719
institution Open Polar
collection CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas)
op_collection_id ftconicet
language English
topic Seabirdfishery Interactions
Discards
Incidental Mortality
Trawl Fisheries
https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
spellingShingle Seabirdfishery Interactions
Discards
Incidental Mortality
Trawl Fisheries
https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
Marinao, Cristian Javier
Yorio, Pablo Martin
Fishery discards and incidental mortality of seabirds attending coastal shrimp trawlers at Isla Escondida, Patagonia, Argentina
topic_facet Seabirdfishery Interactions
Discards
Incidental Mortality
Trawl Fisheries
https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
description We evaluated seabird attendance and incidental mortality at coastal trawl vessels targeting Argentine red shrimp (Pleoticus muelleri) in the Isla Escondida fishing area, Argentina, during 2006-2007 and 2007-2008. Eight seabird species attended vessels, and the most frequent and abundant seabird (percent occurrence, mean number per haul) in the two seasons was the Kelp Gull (Larus dominicanus) (100%, 112.3 and 100%, 263.4, respectively), followed by the Black-browed Albatross (Thalassarche melanophris) (85%, 17.6, and 90%, 32.4, respectively). Eleven Magellanic Penguins (Spheniscus magellanicus) and one Imperial Shag (Leucocarbo atriceps) were killed in nets with a mean capture rate of 0.003 and 0.0003 birds per haul, respectively. The estimated total number of birds killed was 53 penguins and five shags considering the total number of hauls made by the fishery in the two seasons. No contacts between seabirds and warp cables were recorded. Coastal shrimp vessels generally operated between 15 and 20 km offshore, at a mean distance from the main Kelp Gull colony (Punta Tombo) of 43.9 km. At least 100 fish and invertebrate species were discarded, mostly Argentine hake (Merluccius hubbsi). Total amount discarded per season by this coastal fishery in the two seasons was estimated at 3,284 and 6,590 tonnes, respectively. The coastal shrimp fishery in the Isla Escondida area appears to have a small impact on seabirds in terms of incidental mortality but provides significant amounts of supplementary food during the breeding season of the Kelp Gull. Fil: Marinao, Cristian Javier. Universidad Nacional de la Patagonia "San Juan Bosco". Facultad de Ciencias Naturales - Sede Trelew; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Yorio, Pablo Martin. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; Argentina. Wildlife Conservation Society; Estados Unidos
format Article in Journal/Newspaper
author Marinao, Cristian Javier
Yorio, Pablo Martin
author_facet Marinao, Cristian Javier
Yorio, Pablo Martin
author_sort Marinao, Cristian Javier
title Fishery discards and incidental mortality of seabirds attending coastal shrimp trawlers at Isla Escondida, Patagonia, Argentina
title_short Fishery discards and incidental mortality of seabirds attending coastal shrimp trawlers at Isla Escondida, Patagonia, Argentina
title_full Fishery discards and incidental mortality of seabirds attending coastal shrimp trawlers at Isla Escondida, Patagonia, Argentina
title_fullStr Fishery discards and incidental mortality of seabirds attending coastal shrimp trawlers at Isla Escondida, Patagonia, Argentina
title_full_unstemmed Fishery discards and incidental mortality of seabirds attending coastal shrimp trawlers at Isla Escondida, Patagonia, Argentina
title_sort fishery discards and incidental mortality of seabirds attending coastal shrimp trawlers at isla escondida, patagonia, argentina
publisher Wilson Ornithological Society
url http://hdl.handle.net/11336/81910
long_lat ENVELOPE(15.612,15.612,66.797,66.797)
ENVELOPE(-63.717,-63.717,-64.283,-64.283)
ENVELOPE(-63.750,-63.750,-65.050,-65.050)
geographic Patagonia
San Juan
Argentina
Argentine
Hake
Pablo
Escondida
geographic_facet Patagonia
San Juan
Argentina
Argentine
Hake
Pablo
Escondida
genre Imperial Shag
genre_facet Imperial Shag
op_relation info:eu-repo/semantics/altIdentifier/doi/10.1676/11-023.1
info:eu-repo/semantics/altIdentifier/url/https://bioone.org/journals/the-wilson-journal-of-ornithology/volume-123/issue-4/11-023.1/Fishery-Discards-and-Incidental-Mortality-of-Seabirds-Attending-Coastal-Shrimp/10.1676/11-023.1.short
http://hdl.handle.net/11336/81910
Marinao, Cristian Javier; Yorio, Pablo Martin; Fishery discards and incidental mortality of seabirds attending coastal shrimp trawlers at Isla Escondida, Patagonia, Argentina; Wilson Ornithological Society; Wilson Journal of Ornithology; 123; 4; 12-2011; 709-719
1559-4491
1938-5447
CONICET Digital
CONICET
op_rights info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
op_doi https://doi.org/10.1676/11-023.1
container_title The Wilson Journal of Ornithology
container_volume 123
container_issue 4
container_start_page 709
op_container_end_page 719
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