Diet composition of starry smooth‐hound <scp> Mustelus asterias </scp> and methodological considerations for assessing the trophic level of predatory fish
Abstract The stomach contents of 640 starry smooth‐hound Mustelus asterias from the north‐east Atlantic were examined. The diet was dominated by crustaceans (98.8% percentage of index of relative importance, %IRI), with the two main prey species being hermit crab Pagurus bernhardus (34% IRI) and fly...
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crwiley:10.1111/jfb.14245 2024-04-28T08:31:52+00:00 Diet composition of starry smooth‐hound <scp> Mustelus asterias </scp> and methodological considerations for assessing the trophic level of predatory fish McCully Phillips, Sophy R. Grant, Alastair Ellis, Jim R. Department for Environment, Food and Rural Affairs, UK Government 2020 http://dx.doi.org/10.1111/jfb.14245 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fjfb.14245 https://onlinelibrary.wiley.com/doi/pdf/10.1111/jfb.14245 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/jfb.14245 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Fish Biology volume 96, issue 3, page 590-600 ISSN 0022-1112 1095-8649 Aquatic Science Ecology, Evolution, Behavior and Systematics journal-article 2020 crwiley https://doi.org/10.1111/jfb.14245 2024-04-08T06:52:48Z Abstract The stomach contents of 640 starry smooth‐hound Mustelus asterias from the north‐east Atlantic were examined. The diet was dominated by crustaceans (98.8% percentage of index of relative importance, %IRI), with the two main prey species being hermit crab Pagurus bernhardus (34% IRI) and flying crab Liocarcinus holsatus (15% IRI). Ontogenetic dietary preferences showed that smaller individuals [20–69 cm total length ( L T ) n = 283] had a significantly lower diversity of prey than larger individuals (70–124 cm L T , n = 348); however, 18 prey species were found exclusively in smaller individuals and eight prey taxa were found exclusively in larger individuals. Larger commercially important brachyurans such as edible crab Cancer pagurus and velvet swimming crab Necora puber were more prevalent in the diet of larger individuals. Specimens from the North Sea ecoregion had a lower diversity of prey types for a given sample size than fish from the Celtic Seas ecoregion. Whilst cumulative prey curves did not reach an asymptote, this was primarily due to the high taxonomic resolution utilized and 95% of the diet was described by just seven crustacean taxa. The trophic level (TL) was calculated as 4.34 when species‐level prey categories were used. This fine‐scale taxonomic resolution resulted in a TL estimate close to a whole level above that estimated using wider taxonomic groupings. This large bias has important methodological implications for TL studies based on categorized prey data, particularly those of predatory fish. Article in Journal/Newspaper North East Atlantic Wiley Online Library Journal of Fish Biology 96 3 590 600 |
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Wiley Online Library |
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English |
topic |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Aquatic Science Ecology, Evolution, Behavior and Systematics McCully Phillips, Sophy R. Grant, Alastair Ellis, Jim R. Diet composition of starry smooth‐hound <scp> Mustelus asterias </scp> and methodological considerations for assessing the trophic level of predatory fish |
topic_facet |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
description |
Abstract The stomach contents of 640 starry smooth‐hound Mustelus asterias from the north‐east Atlantic were examined. The diet was dominated by crustaceans (98.8% percentage of index of relative importance, %IRI), with the two main prey species being hermit crab Pagurus bernhardus (34% IRI) and flying crab Liocarcinus holsatus (15% IRI). Ontogenetic dietary preferences showed that smaller individuals [20–69 cm total length ( L T ) n = 283] had a significantly lower diversity of prey than larger individuals (70–124 cm L T , n = 348); however, 18 prey species were found exclusively in smaller individuals and eight prey taxa were found exclusively in larger individuals. Larger commercially important brachyurans such as edible crab Cancer pagurus and velvet swimming crab Necora puber were more prevalent in the diet of larger individuals. Specimens from the North Sea ecoregion had a lower diversity of prey types for a given sample size than fish from the Celtic Seas ecoregion. Whilst cumulative prey curves did not reach an asymptote, this was primarily due to the high taxonomic resolution utilized and 95% of the diet was described by just seven crustacean taxa. The trophic level (TL) was calculated as 4.34 when species‐level prey categories were used. This fine‐scale taxonomic resolution resulted in a TL estimate close to a whole level above that estimated using wider taxonomic groupings. This large bias has important methodological implications for TL studies based on categorized prey data, particularly those of predatory fish. |
author2 |
Department for Environment, Food and Rural Affairs, UK Government |
format |
Article in Journal/Newspaper |
author |
McCully Phillips, Sophy R. Grant, Alastair Ellis, Jim R. |
author_facet |
McCully Phillips, Sophy R. Grant, Alastair Ellis, Jim R. |
author_sort |
McCully Phillips, Sophy R. |
title |
Diet composition of starry smooth‐hound <scp> Mustelus asterias </scp> and methodological considerations for assessing the trophic level of predatory fish |
title_short |
Diet composition of starry smooth‐hound <scp> Mustelus asterias </scp> and methodological considerations for assessing the trophic level of predatory fish |
title_full |
Diet composition of starry smooth‐hound <scp> Mustelus asterias </scp> and methodological considerations for assessing the trophic level of predatory fish |
title_fullStr |
Diet composition of starry smooth‐hound <scp> Mustelus asterias </scp> and methodological considerations for assessing the trophic level of predatory fish |
title_full_unstemmed |
Diet composition of starry smooth‐hound <scp> Mustelus asterias </scp> and methodological considerations for assessing the trophic level of predatory fish |
title_sort |
diet composition of starry smooth‐hound <scp> mustelus asterias </scp> and methodological considerations for assessing the trophic level of predatory fish |
publisher |
Wiley |
publishDate |
2020 |
url |
http://dx.doi.org/10.1111/jfb.14245 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fjfb.14245 https://onlinelibrary.wiley.com/doi/pdf/10.1111/jfb.14245 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/jfb.14245 |
genre |
North East Atlantic |
genre_facet |
North East Atlantic |
op_source |
Journal of Fish Biology volume 96, issue 3, page 590-600 ISSN 0022-1112 1095-8649 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/jfb.14245 |
container_title |
Journal of Fish Biology |
container_volume |
96 |
container_issue |
3 |
container_start_page |
590 |
op_container_end_page |
600 |
_version_ |
1797589241989955584 |