The effect of predation (current and historical) by humpback whales (Megaptera novaeangliae) on fish abundance near Kodiak Island, Alaska
Humpback whales (Megaptera novaeangliae) are significant marine consumers. To examine the potential effect of predation by humpback whales, consumption (kg of prey daily) and prey removal (kg of prey annually) were modeled for a current and historic feeding aggregation of humpback whales off northea...
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ftoceandocs:oai:aquadocs.org:1834/25615 2023-05-15T16:35:55+02:00 The effect of predation (current and historical) by humpback whales (Megaptera novaeangliae) on fish abundance near Kodiak Island, Alaska Witteveen, Briana H. Foy, Robert J. Wynne, Kate M. 2006 application/pdf 10-20 http://hdl.handle.net/1834/25615 en eng http://fishbull.noaa.gov/1041/witteveen.pdf 0090-0656 http://hdl.handle.net/1834/25615 http://aquaticcommons.org/id/eprint/9003 403 2012-08-03 18:12:26 9003 United States National Marine Fisheries Service Biology Ecology Fisheries article TRUE 2006 ftoceandocs 2023-04-06T17:02:55Z Humpback whales (Megaptera novaeangliae) are significant marine consumers. To examine the potential effect of predation by humpback whales, consumption (kg of prey daily) and prey removal (kg of prey annually) were modeled for a current and historic feeding aggregation of humpback whales off northeastern Kodiak Island, Alaska. A current prey biomass removal rate was modeled by using an estimate of the 2002 humpback whale abundance. A historic rate of removal was modeled from a prewhaling abundance estimate (population size prior to 1926). Two provisional humpback whale diets were simulated in order to model consumption rate. One diet was based on the stomach contents of whales that were commercially harvested from Port Hobron whaling station in Kodiak, Alaska, between 1926 and 1937, and the second diet, based on local prey availability as determined by fish surveys conducted within the study area, was used to model consumption rate by the historic population. The latter diet was also used to model consumption by the current population and to project a consumption rate if the current population were to grow to reach the historic population size. Models of these simulated diets showed that the current population likely removes nearly 8.83 Article in Journal/Newspaper Humpback Whale Kodiak Megaptera novaeangliae Alaska IODE-UNESCO: OceanDocs - E-Repository of Ocean Publications |
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Open Polar |
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IODE-UNESCO: OceanDocs - E-Repository of Ocean Publications |
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ftoceandocs |
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English |
topic |
Biology Ecology Fisheries |
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Biology Ecology Fisheries Witteveen, Briana H. Foy, Robert J. Wynne, Kate M. The effect of predation (current and historical) by humpback whales (Megaptera novaeangliae) on fish abundance near Kodiak Island, Alaska |
topic_facet |
Biology Ecology Fisheries |
description |
Humpback whales (Megaptera novaeangliae) are significant marine consumers. To examine the potential effect of predation by humpback whales, consumption (kg of prey daily) and prey removal (kg of prey annually) were modeled for a current and historic feeding aggregation of humpback whales off northeastern Kodiak Island, Alaska. A current prey biomass removal rate was modeled by using an estimate of the 2002 humpback whale abundance. A historic rate of removal was modeled from a prewhaling abundance estimate (population size prior to 1926). Two provisional humpback whale diets were simulated in order to model consumption rate. One diet was based on the stomach contents of whales that were commercially harvested from Port Hobron whaling station in Kodiak, Alaska, between 1926 and 1937, and the second diet, based on local prey availability as determined by fish surveys conducted within the study area, was used to model consumption rate by the historic population. The latter diet was also used to model consumption by the current population and to project a consumption rate if the current population were to grow to reach the historic population size. Models of these simulated diets showed that the current population likely removes nearly 8.83 |
format |
Article in Journal/Newspaper |
author |
Witteveen, Briana H. Foy, Robert J. Wynne, Kate M. |
author_facet |
Witteveen, Briana H. Foy, Robert J. Wynne, Kate M. |
author_sort |
Witteveen, Briana H. |
title |
The effect of predation (current and historical) by humpback whales (Megaptera novaeangliae) on fish abundance near Kodiak Island, Alaska |
title_short |
The effect of predation (current and historical) by humpback whales (Megaptera novaeangliae) on fish abundance near Kodiak Island, Alaska |
title_full |
The effect of predation (current and historical) by humpback whales (Megaptera novaeangliae) on fish abundance near Kodiak Island, Alaska |
title_fullStr |
The effect of predation (current and historical) by humpback whales (Megaptera novaeangliae) on fish abundance near Kodiak Island, Alaska |
title_full_unstemmed |
The effect of predation (current and historical) by humpback whales (Megaptera novaeangliae) on fish abundance near Kodiak Island, Alaska |
title_sort |
effect of predation (current and historical) by humpback whales (megaptera novaeangliae) on fish abundance near kodiak island, alaska |
publishDate |
2006 |
url |
http://hdl.handle.net/1834/25615 |
genre |
Humpback Whale Kodiak Megaptera novaeangliae Alaska |
genre_facet |
Humpback Whale Kodiak Megaptera novaeangliae Alaska |
op_source |
http://aquaticcommons.org/id/eprint/9003 403 2012-08-03 18:12:26 9003 United States National Marine Fisheries Service |
op_relation |
http://fishbull.noaa.gov/1041/witteveen.pdf 0090-0656 http://hdl.handle.net/1834/25615 |
_version_ |
1766026230787735552 |