Life History and Production of the Western Gray Whale's Prey, Ampelisca eschrichtii Krøyer, 1842 (Amphipoda, Ampeliscidae).
Ampelisca eschrichtii are among the most important prey of the Western North Pacific gray whales, Eschrichtius robustus. The largest and densest known populations of this amphipod occur in the gray whale's Offshore feeding area on the Northeastern Sakhalin Island Shelf. The remote location, ice...
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ftdoajarticles:oai:doaj.org/article:d0578771f78c4ce988747cdbcc61d35a 2023-05-15T18:09:03+02:00 Life History and Production of the Western Gray Whale's Prey, Ampelisca eschrichtii Krøyer, 1842 (Amphipoda, Ampeliscidae). Natalia L Demchenko John W Chapman Valentina B Durkina Valeriy I Fadeev 2016-01-01T00:00:00Z https://doi.org/10.1371/journal.pone.0147304 https://doaj.org/article/d0578771f78c4ce988747cdbcc61d35a EN eng Public Library of Science (PLoS) http://europepmc.org/articles/PMC4723087?pdf=render https://doaj.org/toc/1932-6203 1932-6203 doi:10.1371/journal.pone.0147304 https://doaj.org/article/d0578771f78c4ce988747cdbcc61d35a PLoS ONE, Vol 11, Iss 1, p e0147304 (2016) Medicine R Science Q article 2016 ftdoajarticles https://doi.org/10.1371/journal.pone.0147304 2022-12-31T00:59:18Z Ampelisca eschrichtii are among the most important prey of the Western North Pacific gray whales, Eschrichtius robustus. The largest and densest known populations of this amphipod occur in the gray whale's Offshore feeding area on the Northeastern Sakhalin Island Shelf. The remote location, ice cover and stormy weather at the Offshore area have prevented winter sampling. The incomplete annual sampling has confounded efforts to resolve life history and production of A. eschrichtii. Expanded comparisons of population size structure and individual reproductive development between late spring and early fall over six sampling years between 2002 and 2013 however, reveal that A. eschrichtii are gonochoristic, iteroparous, mature at body lengths greater than 15 mm and have a two-year life span. The low frequencies of brooding females, the lack of early stage juveniles, the lack of individual or population growth or biomass increases over late spring and summer, all indicate that growth and reproduction occur primarily in winter, when sampling does not occur. Distinct juvenile and adult size cohorts additionally indicate growth and juvenile production occurs in winter through spring under ice cover. Winter growth thus requires that winter detritus or primary production are critical food sources for these ampeliscid populations and yet, the Offshore area and the Eastern Sakhalin Shelf ampeliscid communities may be the most abundant and productive amphipod population in the world. These A. eschrichtii populations are unlikely to be limited by western gray whale predation. Whether benthic community structure can limit access and foraging success of western gray whales is unclear. Article in Journal/Newspaper Sakhalin Directory of Open Access Journals: DOAJ Articles Pacific PLOS ONE 11 1 e0147304 |
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Medicine R Science Q Natalia L Demchenko John W Chapman Valentina B Durkina Valeriy I Fadeev Life History and Production of the Western Gray Whale's Prey, Ampelisca eschrichtii Krøyer, 1842 (Amphipoda, Ampeliscidae). |
topic_facet |
Medicine R Science Q |
description |
Ampelisca eschrichtii are among the most important prey of the Western North Pacific gray whales, Eschrichtius robustus. The largest and densest known populations of this amphipod occur in the gray whale's Offshore feeding area on the Northeastern Sakhalin Island Shelf. The remote location, ice cover and stormy weather at the Offshore area have prevented winter sampling. The incomplete annual sampling has confounded efforts to resolve life history and production of A. eschrichtii. Expanded comparisons of population size structure and individual reproductive development between late spring and early fall over six sampling years between 2002 and 2013 however, reveal that A. eschrichtii are gonochoristic, iteroparous, mature at body lengths greater than 15 mm and have a two-year life span. The low frequencies of brooding females, the lack of early stage juveniles, the lack of individual or population growth or biomass increases over late spring and summer, all indicate that growth and reproduction occur primarily in winter, when sampling does not occur. Distinct juvenile and adult size cohorts additionally indicate growth and juvenile production occurs in winter through spring under ice cover. Winter growth thus requires that winter detritus or primary production are critical food sources for these ampeliscid populations and yet, the Offshore area and the Eastern Sakhalin Shelf ampeliscid communities may be the most abundant and productive amphipod population in the world. These A. eschrichtii populations are unlikely to be limited by western gray whale predation. Whether benthic community structure can limit access and foraging success of western gray whales is unclear. |
format |
Article in Journal/Newspaper |
author |
Natalia L Demchenko John W Chapman Valentina B Durkina Valeriy I Fadeev |
author_facet |
Natalia L Demchenko John W Chapman Valentina B Durkina Valeriy I Fadeev |
author_sort |
Natalia L Demchenko |
title |
Life History and Production of the Western Gray Whale's Prey, Ampelisca eschrichtii Krøyer, 1842 (Amphipoda, Ampeliscidae). |
title_short |
Life History and Production of the Western Gray Whale's Prey, Ampelisca eschrichtii Krøyer, 1842 (Amphipoda, Ampeliscidae). |
title_full |
Life History and Production of the Western Gray Whale's Prey, Ampelisca eschrichtii Krøyer, 1842 (Amphipoda, Ampeliscidae). |
title_fullStr |
Life History and Production of the Western Gray Whale's Prey, Ampelisca eschrichtii Krøyer, 1842 (Amphipoda, Ampeliscidae). |
title_full_unstemmed |
Life History and Production of the Western Gray Whale's Prey, Ampelisca eschrichtii Krøyer, 1842 (Amphipoda, Ampeliscidae). |
title_sort |
life history and production of the western gray whale's prey, ampelisca eschrichtii krøyer, 1842 (amphipoda, ampeliscidae). |
publisher |
Public Library of Science (PLoS) |
publishDate |
2016 |
url |
https://doi.org/10.1371/journal.pone.0147304 https://doaj.org/article/d0578771f78c4ce988747cdbcc61d35a |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Sakhalin |
genre_facet |
Sakhalin |
op_source |
PLoS ONE, Vol 11, Iss 1, p e0147304 (2016) |
op_relation |
http://europepmc.org/articles/PMC4723087?pdf=render https://doaj.org/toc/1932-6203 1932-6203 doi:10.1371/journal.pone.0147304 https://doaj.org/article/d0578771f78c4ce988747cdbcc61d35a |
op_doi |
https://doi.org/10.1371/journal.pone.0147304 |
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PLOS ONE |
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11 |
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