Regional oceanography affects humpback whale entanglements in set fishing gear
Abstract Humpback whales Megaptera novaengliae undertake annual migrations along eastern Australia, where they can be susceptible to entanglement in set fishing gear. This can potentially result in both sublethal and fatal outcomes for the whales, and financial losses for the fishing industry, inclu...
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Online Access: | https://doi.org/10.1111/csp2.13034 https://doaj.org/article/8a97e85f8b614c5eb984fd1ed8b1af5f |
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ftdoajarticles:oai:doaj.org/article:8a97e85f8b614c5eb984fd1ed8b1af5f 2023-12-10T09:49:26+01:00 Regional oceanography affects humpback whale entanglements in set fishing gear Hayden T. Schilling Adelaide V. Dedden Susan Crocetti Geoff Liggins Shona Lorigan Andrew Marshall Tracey L. Rogers Amandine Schaeffer Iain M. Suthers Daniel D. Johnson 2023-11-01T00:00:00Z https://doi.org/10.1111/csp2.13034 https://doaj.org/article/8a97e85f8b614c5eb984fd1ed8b1af5f EN eng Wiley https://doi.org/10.1111/csp2.13034 https://doaj.org/toc/2578-4854 2578-4854 doi:10.1111/csp2.13034 https://doaj.org/article/8a97e85f8b614c5eb984fd1ed8b1af5f Conservation Science and Practice, Vol 5, Iss 11, Pp n/a-n/a (2023) bycatch dynamic ocean management east Australian current fish traps fisher‐wildlife interactions Megaptera novaengliae Ecology QH540-549.5 General. Including nature conservation geographical distribution QH1-199.5 article 2023 ftdoajarticles https://doi.org/10.1111/csp2.13034 2023-11-12T01:38:42Z Abstract Humpback whales Megaptera novaengliae undertake annual migrations along eastern Australia, where they can be susceptible to entanglement in set fishing gear. This can potentially result in both sublethal and fatal outcomes for the whales, and financial losses for the fishing industry, including loss of gear and catch. Interannual fluctuations in entanglement records suggest that dynamic oceanographic features may be associated with the whales' migration path, and therefore, risk of entanglement. Using records of demersal fish traps off the coast of New South Wales (NSW), we identify two areas of high fishing pressure and entanglement risk overlap. Within each area, we combine entanglement observations with metrics associated with the East Australian Current (EAC) and climate (i.e., southern oscillation index). We show that the strength and position of the EAC was associated with the likelihood of entanglement in set fishing gear. In northern NSW (30.3° S), entanglement risk was highest between July and October when the EAC is relatively close to the coast. In contrast, there was no evidence suggesting that oceanography further south in the separation zone of the EAC (33.8° S) was associated with risk of entanglement. In the years following a strongly negative SOI (i.e., El Niño events), entanglement risk was also reduced. While we provide clear linkages with regional oceanographic dynamics and entanglement risk off NSW, if a dynamic ocean management approach to reducing entanglements is to be realized, further research into the fine‐scale movements of humpback whales is needed. Article in Journal/Newspaper Humpback Whale Directory of Open Access Journals: DOAJ Articles Soi ENVELOPE(30.704,30.704,66.481,66.481) Conservation Science and Practice 5 11 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
bycatch dynamic ocean management east Australian current fish traps fisher‐wildlife interactions Megaptera novaengliae Ecology QH540-549.5 General. Including nature conservation geographical distribution QH1-199.5 |
spellingShingle |
bycatch dynamic ocean management east Australian current fish traps fisher‐wildlife interactions Megaptera novaengliae Ecology QH540-549.5 General. Including nature conservation geographical distribution QH1-199.5 Hayden T. Schilling Adelaide V. Dedden Susan Crocetti Geoff Liggins Shona Lorigan Andrew Marshall Tracey L. Rogers Amandine Schaeffer Iain M. Suthers Daniel D. Johnson Regional oceanography affects humpback whale entanglements in set fishing gear |
topic_facet |
bycatch dynamic ocean management east Australian current fish traps fisher‐wildlife interactions Megaptera novaengliae Ecology QH540-549.5 General. Including nature conservation geographical distribution QH1-199.5 |
description |
Abstract Humpback whales Megaptera novaengliae undertake annual migrations along eastern Australia, where they can be susceptible to entanglement in set fishing gear. This can potentially result in both sublethal and fatal outcomes for the whales, and financial losses for the fishing industry, including loss of gear and catch. Interannual fluctuations in entanglement records suggest that dynamic oceanographic features may be associated with the whales' migration path, and therefore, risk of entanglement. Using records of demersal fish traps off the coast of New South Wales (NSW), we identify two areas of high fishing pressure and entanglement risk overlap. Within each area, we combine entanglement observations with metrics associated with the East Australian Current (EAC) and climate (i.e., southern oscillation index). We show that the strength and position of the EAC was associated with the likelihood of entanglement in set fishing gear. In northern NSW (30.3° S), entanglement risk was highest between July and October when the EAC is relatively close to the coast. In contrast, there was no evidence suggesting that oceanography further south in the separation zone of the EAC (33.8° S) was associated with risk of entanglement. In the years following a strongly negative SOI (i.e., El Niño events), entanglement risk was also reduced. While we provide clear linkages with regional oceanographic dynamics and entanglement risk off NSW, if a dynamic ocean management approach to reducing entanglements is to be realized, further research into the fine‐scale movements of humpback whales is needed. |
format |
Article in Journal/Newspaper |
author |
Hayden T. Schilling Adelaide V. Dedden Susan Crocetti Geoff Liggins Shona Lorigan Andrew Marshall Tracey L. Rogers Amandine Schaeffer Iain M. Suthers Daniel D. Johnson |
author_facet |
Hayden T. Schilling Adelaide V. Dedden Susan Crocetti Geoff Liggins Shona Lorigan Andrew Marshall Tracey L. Rogers Amandine Schaeffer Iain M. Suthers Daniel D. Johnson |
author_sort |
Hayden T. Schilling |
title |
Regional oceanography affects humpback whale entanglements in set fishing gear |
title_short |
Regional oceanography affects humpback whale entanglements in set fishing gear |
title_full |
Regional oceanography affects humpback whale entanglements in set fishing gear |
title_fullStr |
Regional oceanography affects humpback whale entanglements in set fishing gear |
title_full_unstemmed |
Regional oceanography affects humpback whale entanglements in set fishing gear |
title_sort |
regional oceanography affects humpback whale entanglements in set fishing gear |
publisher |
Wiley |
publishDate |
2023 |
url |
https://doi.org/10.1111/csp2.13034 https://doaj.org/article/8a97e85f8b614c5eb984fd1ed8b1af5f |
long_lat |
ENVELOPE(30.704,30.704,66.481,66.481) |
geographic |
Soi |
geographic_facet |
Soi |
genre |
Humpback Whale |
genre_facet |
Humpback Whale |
op_source |
Conservation Science and Practice, Vol 5, Iss 11, Pp n/a-n/a (2023) |
op_relation |
https://doi.org/10.1111/csp2.13034 https://doaj.org/toc/2578-4854 2578-4854 doi:10.1111/csp2.13034 https://doaj.org/article/8a97e85f8b614c5eb984fd1ed8b1af5f |
op_doi |
https://doi.org/10.1111/csp2.13034 |
container_title |
Conservation Science and Practice |
container_volume |
5 |
container_issue |
11 |
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1784893873308303360 |