Multispecies functional response of the minke whale Balaenoptera acutorostrata based on small-scale foraging studies
Atlantic minke whales are important predators in the Barents Sea ecosystem; capelin Mallotus villosus, krill Thysanoessa sp. and Meganyctephanes norvegica and herring Clupea harengus are their major prey. Their consumption of commercial species may present an economic problem for the local fishery....
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Inter-Research
2007
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Online Access: | http://hdl.handle.net/11250/108605 https://doi.org/10.3354/meps341277 |
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ftimr:oai:imr.brage.unit.no:11250/108605 2023-05-15T15:36:10+02:00 Multispecies functional response of the minke whale Balaenoptera acutorostrata based on small-scale foraging studies Smout, Sophie Lindstrøm, Ulf 2007-07-04 application/pdf http://hdl.handle.net/11250/108605 https://doi.org/10.3354/meps341277 eng eng Inter-Research urn:issn:0171-8630 urn:issn:1616-1599 http://hdl.handle.net/11250/108605 http://dx.doi.org/10.3354/meps341277 277-291 341 Marine Ecology Progress Series minke whale vågehval Barents Sea Barentshavet VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Aquaculture: 922 Journal article Peer reviewed 2007 ftimr https://doi.org/10.3354/meps341277 2021-09-23T20:14:51Z Atlantic minke whales are important predators in the Barents Sea ecosystem; capelin Mallotus villosus, krill Thysanoessa sp. and Meganyctephanes norvegica and herring Clupea harengus are their major prey. Their consumption of commercial species may present an economic problem for the local fishery. In order to estimate this consumption and understand the potential consequences for prey dynamics, it is essential to determine the multispecies functional response of the whales. The parameterisation of a functional response requires measurements of consumption rates and prey availability. In this localised study, undigested stomach contents were used to assess the amount of each prey that had been consumed immediately prior to capture. To determine the availability of prey to the whales, standard acoustic surveys were run in the same area within 2 d of the capture of the whales. The spatial distribution of prey was modelled using generalised additive models (GAMs). In order to generate a measure of prey availability and the uncertainty in this value, a simple model was assumed for whale movement, and prey abundance was sampled over space according to a Gaussian kernel. A multispecies functional response (MSFR) model was then fitted to the consumption and prey availability data using Bayesian methods. Simple simulations, based on the fitted MSFR, indicate that minke whales may deplete local capelin aggregations at small spatial scales. This is the first time that a multispecies functional response has been fitted for a cetacean predator, and the methods outlined here may prove useful for modelling marine mammal-fish interactions in other systems. Article in Journal/Newspaper Balaenoptera acutorostrata Barents Sea Barentshav* minke whale vågehval Institute for Marine Research: Brage IMR Barents Sea Marine Ecology Progress Series 341 277 291 |
institution |
Open Polar |
collection |
Institute for Marine Research: Brage IMR |
op_collection_id |
ftimr |
language |
English |
topic |
minke whale vågehval Barents Sea Barentshavet VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Aquaculture: 922 |
spellingShingle |
minke whale vågehval Barents Sea Barentshavet VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Aquaculture: 922 Smout, Sophie Lindstrøm, Ulf Multispecies functional response of the minke whale Balaenoptera acutorostrata based on small-scale foraging studies |
topic_facet |
minke whale vågehval Barents Sea Barentshavet VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Aquaculture: 922 |
description |
Atlantic minke whales are important predators in the Barents Sea ecosystem; capelin Mallotus villosus, krill Thysanoessa sp. and Meganyctephanes norvegica and herring Clupea harengus are their major prey. Their consumption of commercial species may present an economic problem for the local fishery. In order to estimate this consumption and understand the potential consequences for prey dynamics, it is essential to determine the multispecies functional response of the whales. The parameterisation of a functional response requires measurements of consumption rates and prey availability. In this localised study, undigested stomach contents were used to assess the amount of each prey that had been consumed immediately prior to capture. To determine the availability of prey to the whales, standard acoustic surveys were run in the same area within 2 d of the capture of the whales. The spatial distribution of prey was modelled using generalised additive models (GAMs). In order to generate a measure of prey availability and the uncertainty in this value, a simple model was assumed for whale movement, and prey abundance was sampled over space according to a Gaussian kernel. A multispecies functional response (MSFR) model was then fitted to the consumption and prey availability data using Bayesian methods. Simple simulations, based on the fitted MSFR, indicate that minke whales may deplete local capelin aggregations at small spatial scales. This is the first time that a multispecies functional response has been fitted for a cetacean predator, and the methods outlined here may prove useful for modelling marine mammal-fish interactions in other systems. |
format |
Article in Journal/Newspaper |
author |
Smout, Sophie Lindstrøm, Ulf |
author_facet |
Smout, Sophie Lindstrøm, Ulf |
author_sort |
Smout, Sophie |
title |
Multispecies functional response of the minke whale Balaenoptera acutorostrata based on small-scale foraging studies |
title_short |
Multispecies functional response of the minke whale Balaenoptera acutorostrata based on small-scale foraging studies |
title_full |
Multispecies functional response of the minke whale Balaenoptera acutorostrata based on small-scale foraging studies |
title_fullStr |
Multispecies functional response of the minke whale Balaenoptera acutorostrata based on small-scale foraging studies |
title_full_unstemmed |
Multispecies functional response of the minke whale Balaenoptera acutorostrata based on small-scale foraging studies |
title_sort |
multispecies functional response of the minke whale balaenoptera acutorostrata based on small-scale foraging studies |
publisher |
Inter-Research |
publishDate |
2007 |
url |
http://hdl.handle.net/11250/108605 https://doi.org/10.3354/meps341277 |
geographic |
Barents Sea |
geographic_facet |
Barents Sea |
genre |
Balaenoptera acutorostrata Barents Sea Barentshav* minke whale vågehval |
genre_facet |
Balaenoptera acutorostrata Barents Sea Barentshav* minke whale vågehval |
op_source |
277-291 341 Marine Ecology Progress Series |
op_relation |
urn:issn:0171-8630 urn:issn:1616-1599 http://hdl.handle.net/11250/108605 http://dx.doi.org/10.3354/meps341277 |
op_doi |
https://doi.org/10.3354/meps341277 |
container_title |
Marine Ecology Progress Series |
container_volume |
341 |
container_start_page |
277 |
op_container_end_page |
291 |
_version_ |
1766366502590611456 |