Seasonal, Small-Scale Distribution of Atka Mackerel in the Aleutian Islands, Alaska, with Respect to Reproduction
We investigated the spatial distribution of Atka mackerel Pleurogrammus monopterygius with respect to maturity stage at Seguam Pass in the Aleutian Islands as well as their spawning locations within trawlable areas at three small-scale (10–20-nautical mile or 18.5–37.0-km) sites. Histological method...
Published in: | Marine and Coastal Fisheries |
---|---|
Main Authors: | , |
Format: | Text |
Language: | English |
Published: |
American Fisheries Society
2011
|
Subjects: | |
Online Access: | https://doi.org/10.1080/19425120.2011.558439 |
id |
ftbioone:10.1080/19425120.2011.558439 |
---|---|
record_format |
openpolar |
spelling |
ftbioone:10.1080/19425120.2011.558439 2024-06-02T08:15:57+00:00 Seasonal, Small-Scale Distribution of Atka Mackerel in the Aleutian Islands, Alaska, with Respect to Reproduction Daniel Cooper Susanne McDermott Daniel Cooper Susanne McDermott world 2011-01-01 text/HTML https://doi.org/10.1080/19425120.2011.558439 en eng American Fisheries Society doi:10.1080/19425120.2011.558439 All rights reserved. https://doi.org/10.1080/19425120.2011.558439 Text 2011 ftbioone https://doi.org/10.1080/19425120.2011.558439 2024-05-07T00:51:43Z We investigated the spatial distribution of Atka mackerel Pleurogrammus monopterygius with respect to maturity stage at Seguam Pass in the Aleutian Islands as well as their spawning locations within trawlable areas at three small-scale (10–20-nautical mile or 18.5–37.0-km) sites. Histological methods were used to determine maturity stages, and male maturity stages are described for the first time. Spawning areas were identified by catch per unit effort of demersal egg masses. At Seguam Pass, spawning was concentrated in the area adjacent to the east side of Amlia Island and between Amlia and Seguam islands. The observed spatial segregation of Atka mackerel by sex and maturity stage appears to interact with the boundaries of the trawl exclusion zone (TEZ) at Seguam Pass. During spawning, mature fish aggregate inside the closed area and immature fish and nonreproductively active mature males aggregate outside the TEZ in the area open to fishing. This increased the commercial catch selectivity of nonreproductively active males and immature fish during the September fishery. The spawning areas observed at Seguam and Tanaga passes and near Amchitka Island were within TEZs, which may serve as de facto marine protected areas for spawning Atka mackerel. Text Alaska Aleutian Islands BioOne Online Journals Amchitka ENVELOPE(178.878,178.878,51.567,51.567) Amchitka Island ENVELOPE(178.983,178.983,51.542,51.542) Atka ENVELOPE(151.789,151.789,60.835,60.835) Marine and Coastal Fisheries 3 1 10 20 |
institution |
Open Polar |
collection |
BioOne Online Journals |
op_collection_id |
ftbioone |
language |
English |
description |
We investigated the spatial distribution of Atka mackerel Pleurogrammus monopterygius with respect to maturity stage at Seguam Pass in the Aleutian Islands as well as their spawning locations within trawlable areas at three small-scale (10–20-nautical mile or 18.5–37.0-km) sites. Histological methods were used to determine maturity stages, and male maturity stages are described for the first time. Spawning areas were identified by catch per unit effort of demersal egg masses. At Seguam Pass, spawning was concentrated in the area adjacent to the east side of Amlia Island and between Amlia and Seguam islands. The observed spatial segregation of Atka mackerel by sex and maturity stage appears to interact with the boundaries of the trawl exclusion zone (TEZ) at Seguam Pass. During spawning, mature fish aggregate inside the closed area and immature fish and nonreproductively active mature males aggregate outside the TEZ in the area open to fishing. This increased the commercial catch selectivity of nonreproductively active males and immature fish during the September fishery. The spawning areas observed at Seguam and Tanaga passes and near Amchitka Island were within TEZs, which may serve as de facto marine protected areas for spawning Atka mackerel. |
author2 |
Daniel Cooper Susanne McDermott |
format |
Text |
author |
Daniel Cooper Susanne McDermott |
spellingShingle |
Daniel Cooper Susanne McDermott Seasonal, Small-Scale Distribution of Atka Mackerel in the Aleutian Islands, Alaska, with Respect to Reproduction |
author_facet |
Daniel Cooper Susanne McDermott |
author_sort |
Daniel Cooper |
title |
Seasonal, Small-Scale Distribution of Atka Mackerel in the Aleutian Islands, Alaska, with Respect to Reproduction |
title_short |
Seasonal, Small-Scale Distribution of Atka Mackerel in the Aleutian Islands, Alaska, with Respect to Reproduction |
title_full |
Seasonal, Small-Scale Distribution of Atka Mackerel in the Aleutian Islands, Alaska, with Respect to Reproduction |
title_fullStr |
Seasonal, Small-Scale Distribution of Atka Mackerel in the Aleutian Islands, Alaska, with Respect to Reproduction |
title_full_unstemmed |
Seasonal, Small-Scale Distribution of Atka Mackerel in the Aleutian Islands, Alaska, with Respect to Reproduction |
title_sort |
seasonal, small-scale distribution of atka mackerel in the aleutian islands, alaska, with respect to reproduction |
publisher |
American Fisheries Society |
publishDate |
2011 |
url |
https://doi.org/10.1080/19425120.2011.558439 |
op_coverage |
world |
long_lat |
ENVELOPE(178.878,178.878,51.567,51.567) ENVELOPE(178.983,178.983,51.542,51.542) ENVELOPE(151.789,151.789,60.835,60.835) |
geographic |
Amchitka Amchitka Island Atka |
geographic_facet |
Amchitka Amchitka Island Atka |
genre |
Alaska Aleutian Islands |
genre_facet |
Alaska Aleutian Islands |
op_source |
https://doi.org/10.1080/19425120.2011.558439 |
op_relation |
doi:10.1080/19425120.2011.558439 |
op_rights |
All rights reserved. |
op_doi |
https://doi.org/10.1080/19425120.2011.558439 |
container_title |
Marine and Coastal Fisheries |
container_volume |
3 |
container_issue |
1 |
container_start_page |
10 |
op_container_end_page |
20 |
_version_ |
1800740267610865664 |