Sablefish, Anoplopoma fimbria, Populations on Gulf of Alaska Seamounts
Sablefish, Anoplopoma fimbria, were tagged and released on Gulf of Alaska seamounts during 1999–2002 to determine the extent, if any, of emigration from the seamounts back to the continental slope and of movement between seamounts.Seventeen sablefish from Gulf of Alaska seamounts have been recovered...
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ftoceandocs:oai:aquadocs.org:1834/26333 2023-05-15T18:48:33+02:00 Sablefish, Anoplopoma fimbria, Populations on Gulf of Alaska Seamounts Maloney, Nancy E. 2004 application/pdf 1-12 http://hdl.handle.net/1834/26333 en eng http://spo.nmfs.noaa.gov/mfr663/mfr6631.pdf 0090-1830 http://hdl.handle.net/1834/26333 http://aquaticcommons.org/id/eprint/9719 403 2012-08-15 17:49:02 9719 United States National Marine Fisheries Service Biology Ecology Fisheries Management article TRUE 2004 ftoceandocs 2023-04-06T17:03:09Z Sablefish, Anoplopoma fimbria, were tagged and released on Gulf of Alaska seamounts during 1999–2002 to determine the extent, if any, of emigration from the seamounts back to the continental slope and of movement between seamounts.Seventeen sablefish from Gulf of Alaska seamounts have been recovered on the continental slope since tagging began,verifying that seamount to slope migration occurs. Forty-two sablefish were recovered on the same seamounts where they were tagged, and none have been recaptured onseamounts other than the ones where they were released.Sablefish populations on Gulf of Alaska seamounts are made up of individuals mostly older than 5 years and are maledominant, with sex ratios varying from 4:1 up to 10:1 males to females. Males are smaller than females, but the average age of males is greater than that of females, and males have a greater range of age (4–64 yr) than females (4–48 yr). Otoliths of seamount fish frequently have an areaof highly compressed annuli, known as the transition zone, where growth has suddenly and greatly slowed or even stopped. Because transition zones can be present in both younger and older seamount fish and are rare in slope fish, formation of otolith transition zones may be related to travel to the seamounts.The route sablefish use to reach the seamounts is so far unknown. One possibility is that fish enter the eastward-flowing North Pacific Current off the Aleutian Islands orwestern Gulf of Alaska and travel more or less passively on the current until encountering a seamount. The route from seamount back to slope would likely be the northwardflowingAlaska Current. These routes are discussed in light of tag recovery locations of slope- and seamount-tagged fish. Article in Journal/Newspaper Alaska Aleutian Islands IODE-UNESCO: OceanDocs - E-Repository of Ocean Publications Gulf of Alaska Pacific |
institution |
Open Polar |
collection |
IODE-UNESCO: OceanDocs - E-Repository of Ocean Publications |
op_collection_id |
ftoceandocs |
language |
English |
topic |
Biology Ecology Fisheries Management |
spellingShingle |
Biology Ecology Fisheries Management Maloney, Nancy E. Sablefish, Anoplopoma fimbria, Populations on Gulf of Alaska Seamounts |
topic_facet |
Biology Ecology Fisheries Management |
description |
Sablefish, Anoplopoma fimbria, were tagged and released on Gulf of Alaska seamounts during 1999–2002 to determine the extent, if any, of emigration from the seamounts back to the continental slope and of movement between seamounts.Seventeen sablefish from Gulf of Alaska seamounts have been recovered on the continental slope since tagging began,verifying that seamount to slope migration occurs. Forty-two sablefish were recovered on the same seamounts where they were tagged, and none have been recaptured onseamounts other than the ones where they were released.Sablefish populations on Gulf of Alaska seamounts are made up of individuals mostly older than 5 years and are maledominant, with sex ratios varying from 4:1 up to 10:1 males to females. Males are smaller than females, but the average age of males is greater than that of females, and males have a greater range of age (4–64 yr) than females (4–48 yr). Otoliths of seamount fish frequently have an areaof highly compressed annuli, known as the transition zone, where growth has suddenly and greatly slowed or even stopped. Because transition zones can be present in both younger and older seamount fish and are rare in slope fish, formation of otolith transition zones may be related to travel to the seamounts.The route sablefish use to reach the seamounts is so far unknown. One possibility is that fish enter the eastward-flowing North Pacific Current off the Aleutian Islands orwestern Gulf of Alaska and travel more or less passively on the current until encountering a seamount. The route from seamount back to slope would likely be the northwardflowingAlaska Current. These routes are discussed in light of tag recovery locations of slope- and seamount-tagged fish. |
format |
Article in Journal/Newspaper |
author |
Maloney, Nancy E. |
author_facet |
Maloney, Nancy E. |
author_sort |
Maloney, Nancy E. |
title |
Sablefish, Anoplopoma fimbria, Populations on Gulf of Alaska Seamounts |
title_short |
Sablefish, Anoplopoma fimbria, Populations on Gulf of Alaska Seamounts |
title_full |
Sablefish, Anoplopoma fimbria, Populations on Gulf of Alaska Seamounts |
title_fullStr |
Sablefish, Anoplopoma fimbria, Populations on Gulf of Alaska Seamounts |
title_full_unstemmed |
Sablefish, Anoplopoma fimbria, Populations on Gulf of Alaska Seamounts |
title_sort |
sablefish, anoplopoma fimbria, populations on gulf of alaska seamounts |
publishDate |
2004 |
url |
http://hdl.handle.net/1834/26333 |
geographic |
Gulf of Alaska Pacific |
geographic_facet |
Gulf of Alaska Pacific |
genre |
Alaska Aleutian Islands |
genre_facet |
Alaska Aleutian Islands |
op_source |
http://aquaticcommons.org/id/eprint/9719 403 2012-08-15 17:49:02 9719 United States National Marine Fisheries Service |
op_relation |
http://spo.nmfs.noaa.gov/mfr663/mfr6631.pdf 0090-1830 http://hdl.handle.net/1834/26333 |
_version_ |
1766241667358130176 |