Effects of a fishery closure and prey abundance on seabird diet and breeding success: Implications for strategic fisheries management and seabird conservation
Industrial forage fish fisheries may reduce prey availability affecting diet and breeding success of marine predators. However, evidence for fisheries effects on predator demography remains rare, hindering evaluation of their impact on populations. Using 25 years of data on the commercial lesser san...
Published in: | Biological Conservation |
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Main Authors: | , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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2023
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Online Access: | https://orbit.dtu.dk/en/publications/305d6ed0-7e38-488f-9078-a96ebb70433c https://doi.org/10.1016/j.biocon.2023.109990 https://backend.orbit.dtu.dk/ws/files/315517342/1_s2.0_S0006320723000903_main.pdf |
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ftdtupubl:oai:pure.atira.dk:publications/305d6ed0-7e38-488f-9078-a96ebb70433c 2024-09-15T17:55:37+00:00 Effects of a fishery closure and prey abundance on seabird diet and breeding success: Implications for strategic fisheries management and seabird conservation Searle, Kate R. Regan, Charlotte E. Perrow, Martin R. Butler, Adam Rindorf, Anna Harris, Michael P. Newell, Mark A. Wanless, Sarah Daunt, Francis 2023 application/pdf https://orbit.dtu.dk/en/publications/305d6ed0-7e38-488f-9078-a96ebb70433c https://doi.org/10.1016/j.biocon.2023.109990 https://backend.orbit.dtu.dk/ws/files/315517342/1_s2.0_S0006320723000903_main.pdf eng eng https://orbit.dtu.dk/en/publications/305d6ed0-7e38-488f-9078-a96ebb70433c info:eu-repo/semantics/openAccess Searle , K R , Regan , C E , Perrow , M R , Butler , A , Rindorf , A , Harris , M P , Newell , M A , Wanless , S & Daunt , F 2023 , ' Effects of a fishery closure and prey abundance on seabird diet and breeding success: Implications for strategic fisheries management and seabird conservation ' , Biological Conservation , vol. 281 , 109990 . https://doi.org/10.1016/j.biocon.2023.109990 Seabird breeding success Fisheries management Kittiwake Lesser sandeel Marine conservation Murre Sprat Net gain North atlantic seabird community article 2023 ftdtupubl https://doi.org/10.1016/j.biocon.2023.109990 2024-08-13T00:03:06Z Industrial forage fish fisheries may reduce prey availability affecting diet and breeding success of marine predators. However, evidence for fisheries effects on predator demography remains rare, hindering evaluation of their impact on populations. Using 25 years of data on the commercial lesser sandeel fishery in the north-western North Sea, we evaluated the effectiveness of the closure in safeguarding breeding success of four seabird species - black-legged kittiwake, common guillemot, Atlantic puffin and razorbill. We also tested for effects of a scientific fishery in the closed area on breeding success. We quantified how changes in the diet of chicks for the four seabird species were influenced by the abundance of sandeels and the alternative prey species, European sprat, and the potential prey behavioural disturbance effects of sandeel fishing on the prey. Finally, we examined how changes in chick diet and prey abundance have shaped long-term variation in seabird breeding success. The period of fishery operation was associated with a decline in kittiwake breeding success in colonies with foraging ranges overlapping the closed area, from 52 % of young fledged pre-fishery to 23 % during fishery operation. Breeding success increased by approximately 10 % in the period following fishery closure to 2018. We document wide uncertainty around this increase in breeding success, partly driven by variation in the responses of individual colonies. For guillemot, razorbill and puffin we found no evidence for negative effects of the fishery on breeding success, nor for positive effects arising from its closure. We found no evidence for an impact on breeding success of the scientific fishery. The proportion of sandeel in chick diet was positively associated with breeding success in the four species, albeit with only weak evidence for puffin. Fishing effort was associated with a decreased proportion of sandeel in puffin diet, a lower proportion of the sandeel component of the diet consisting of 0-group in kittiwake, ... Article in Journal/Newspaper Atlantic puffin Black-legged Kittiwake common guillemot North Atlantic Razorbill Technical University of Denmark: DTU Orbit Biological Conservation 281 109990 |
institution |
Open Polar |
collection |
Technical University of Denmark: DTU Orbit |
op_collection_id |
ftdtupubl |
language |
English |
topic |
Seabird breeding success Fisheries management Kittiwake Lesser sandeel Marine conservation Murre Sprat Net gain North atlantic seabird community |
spellingShingle |
Seabird breeding success Fisheries management Kittiwake Lesser sandeel Marine conservation Murre Sprat Net gain North atlantic seabird community Searle, Kate R. Regan, Charlotte E. Perrow, Martin R. Butler, Adam Rindorf, Anna Harris, Michael P. Newell, Mark A. Wanless, Sarah Daunt, Francis Effects of a fishery closure and prey abundance on seabird diet and breeding success: Implications for strategic fisheries management and seabird conservation |
topic_facet |
Seabird breeding success Fisheries management Kittiwake Lesser sandeel Marine conservation Murre Sprat Net gain North atlantic seabird community |
description |
Industrial forage fish fisheries may reduce prey availability affecting diet and breeding success of marine predators. However, evidence for fisheries effects on predator demography remains rare, hindering evaluation of their impact on populations. Using 25 years of data on the commercial lesser sandeel fishery in the north-western North Sea, we evaluated the effectiveness of the closure in safeguarding breeding success of four seabird species - black-legged kittiwake, common guillemot, Atlantic puffin and razorbill. We also tested for effects of a scientific fishery in the closed area on breeding success. We quantified how changes in the diet of chicks for the four seabird species were influenced by the abundance of sandeels and the alternative prey species, European sprat, and the potential prey behavioural disturbance effects of sandeel fishing on the prey. Finally, we examined how changes in chick diet and prey abundance have shaped long-term variation in seabird breeding success. The period of fishery operation was associated with a decline in kittiwake breeding success in colonies with foraging ranges overlapping the closed area, from 52 % of young fledged pre-fishery to 23 % during fishery operation. Breeding success increased by approximately 10 % in the period following fishery closure to 2018. We document wide uncertainty around this increase in breeding success, partly driven by variation in the responses of individual colonies. For guillemot, razorbill and puffin we found no evidence for negative effects of the fishery on breeding success, nor for positive effects arising from its closure. We found no evidence for an impact on breeding success of the scientific fishery. The proportion of sandeel in chick diet was positively associated with breeding success in the four species, albeit with only weak evidence for puffin. Fishing effort was associated with a decreased proportion of sandeel in puffin diet, a lower proportion of the sandeel component of the diet consisting of 0-group in kittiwake, ... |
format |
Article in Journal/Newspaper |
author |
Searle, Kate R. Regan, Charlotte E. Perrow, Martin R. Butler, Adam Rindorf, Anna Harris, Michael P. Newell, Mark A. Wanless, Sarah Daunt, Francis |
author_facet |
Searle, Kate R. Regan, Charlotte E. Perrow, Martin R. Butler, Adam Rindorf, Anna Harris, Michael P. Newell, Mark A. Wanless, Sarah Daunt, Francis |
author_sort |
Searle, Kate R. |
title |
Effects of a fishery closure and prey abundance on seabird diet and breeding success: Implications for strategic fisheries management and seabird conservation |
title_short |
Effects of a fishery closure and prey abundance on seabird diet and breeding success: Implications for strategic fisheries management and seabird conservation |
title_full |
Effects of a fishery closure and prey abundance on seabird diet and breeding success: Implications for strategic fisheries management and seabird conservation |
title_fullStr |
Effects of a fishery closure and prey abundance on seabird diet and breeding success: Implications for strategic fisheries management and seabird conservation |
title_full_unstemmed |
Effects of a fishery closure and prey abundance on seabird diet and breeding success: Implications for strategic fisheries management and seabird conservation |
title_sort |
effects of a fishery closure and prey abundance on seabird diet and breeding success: implications for strategic fisheries management and seabird conservation |
publishDate |
2023 |
url |
https://orbit.dtu.dk/en/publications/305d6ed0-7e38-488f-9078-a96ebb70433c https://doi.org/10.1016/j.biocon.2023.109990 https://backend.orbit.dtu.dk/ws/files/315517342/1_s2.0_S0006320723000903_main.pdf |
genre |
Atlantic puffin Black-legged Kittiwake common guillemot North Atlantic Razorbill |
genre_facet |
Atlantic puffin Black-legged Kittiwake common guillemot North Atlantic Razorbill |
op_source |
Searle , K R , Regan , C E , Perrow , M R , Butler , A , Rindorf , A , Harris , M P , Newell , M A , Wanless , S & Daunt , F 2023 , ' Effects of a fishery closure and prey abundance on seabird diet and breeding success: Implications for strategic fisheries management and seabird conservation ' , Biological Conservation , vol. 281 , 109990 . https://doi.org/10.1016/j.biocon.2023.109990 |
op_relation |
https://orbit.dtu.dk/en/publications/305d6ed0-7e38-488f-9078-a96ebb70433c |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1016/j.biocon.2023.109990 |
container_title |
Biological Conservation |
container_volume |
281 |
container_start_page |
109990 |
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1810431878093602816 |