Forecasting the stock size of the autumn cohort of Japanese common squid (Todarodes pacificus) based on the abundance of trawl-caught juveniles
The distribution of juveniles of Japanese common squid (Todarodes pacificus) autumn cohort and its relation to oceanographic conditions were analyzed to see if they can be used to accurately forecast the stock size. Research cruises was conducted using a total of 5 research vessels during 2001-2010...
Main Authors: | , , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | Spanish |
Published: |
Universidad Autónoma Metropolitana
2016
|
Subjects: | |
Online Access: | https://hidrobiologica.izt.uam.mx/index.php/revHidro/article/view/552 |
id |
fthidrobiologica:oai:ojs.hidrobiologica.izt.uam.mx:article/552 |
---|---|
record_format |
openpolar |
spelling |
fthidrobiologica:oai:ojs.hidrobiologica.izt.uam.mx:article/552 2023-05-15T16:02:01+02:00 Forecasting the stock size of the autumn cohort of Japanese common squid (Todarodes pacificus) based on the abundance of trawl-caught juveniles Kidokoro, Hideaki Shikata, Takafumi Kitagawa, Shinsuke 2016-12-27 application/pdf https://hidrobiologica.izt.uam.mx/index.php/revHidro/article/view/552 spa spa Universidad Autónoma Metropolitana https://hidrobiologica.izt.uam.mx/index.php/revHidro/article/view/552/143 https://hidrobiologica.izt.uam.mx/index.php/revHidro/article/view/552 Derechos de autor 2016 HIDROBIOLÓGICA HIDROBIOLÓGICA; Vol. 24 Núm. 1 (2014); 23-31 2448-7333 0188-8897 Ommastrephidae predicting stock size stock management info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2016 fthidrobiologica 2022-06-01T09:46:40Z The distribution of juveniles of Japanese common squid (Todarodes pacificus) autumn cohort and its relation to oceanographic conditions were analyzed to see if they can be used to accurately forecast the stock size. Research cruises was conducted using a total of 5 research vessels during 2001-2010 in April in the southern Sea of Japan. Juveniles were caught in 267 of 331 tows of a trawl net at approximately 0-10 m depth, and the numbers caught in each tow ranged from 0 to 1087. Samples were divided into the autumn and winter cohorts based on the dorsal mantle length (DML). The autumn cohort was abundant (40 inds / tow) where the sea surface temperature ranged from 10 to 11 °C and less abundant in warmer water. This cohort was more abundant in offshore areas, while the winter cohort was more abundant near shore. The mean catch of the autumn cohort was used as an index of the annual abundance of juveniles. This index and the stock size were significantly correlated. These results suggest that the stock size of the T. pacificus autumn cohort can be forecasted before the fishing season based on the abundance of juveniles, but this relationship is highly uncertain due to observational errors Article in Journal/Newspaper DML Hidrobiológica (E-Journal) |
institution |
Open Polar |
collection |
Hidrobiológica (E-Journal) |
op_collection_id |
fthidrobiologica |
language |
Spanish |
topic |
Ommastrephidae predicting stock size stock management |
spellingShingle |
Ommastrephidae predicting stock size stock management Kidokoro, Hideaki Shikata, Takafumi Kitagawa, Shinsuke Forecasting the stock size of the autumn cohort of Japanese common squid (Todarodes pacificus) based on the abundance of trawl-caught juveniles |
topic_facet |
Ommastrephidae predicting stock size stock management |
description |
The distribution of juveniles of Japanese common squid (Todarodes pacificus) autumn cohort and its relation to oceanographic conditions were analyzed to see if they can be used to accurately forecast the stock size. Research cruises was conducted using a total of 5 research vessels during 2001-2010 in April in the southern Sea of Japan. Juveniles were caught in 267 of 331 tows of a trawl net at approximately 0-10 m depth, and the numbers caught in each tow ranged from 0 to 1087. Samples were divided into the autumn and winter cohorts based on the dorsal mantle length (DML). The autumn cohort was abundant (40 inds / tow) where the sea surface temperature ranged from 10 to 11 °C and less abundant in warmer water. This cohort was more abundant in offshore areas, while the winter cohort was more abundant near shore. The mean catch of the autumn cohort was used as an index of the annual abundance of juveniles. This index and the stock size were significantly correlated. These results suggest that the stock size of the T. pacificus autumn cohort can be forecasted before the fishing season based on the abundance of juveniles, but this relationship is highly uncertain due to observational errors |
format |
Article in Journal/Newspaper |
author |
Kidokoro, Hideaki Shikata, Takafumi Kitagawa, Shinsuke |
author_facet |
Kidokoro, Hideaki Shikata, Takafumi Kitagawa, Shinsuke |
author_sort |
Kidokoro, Hideaki |
title |
Forecasting the stock size of the autumn cohort of Japanese common squid (Todarodes pacificus) based on the abundance of trawl-caught juveniles |
title_short |
Forecasting the stock size of the autumn cohort of Japanese common squid (Todarodes pacificus) based on the abundance of trawl-caught juveniles |
title_full |
Forecasting the stock size of the autumn cohort of Japanese common squid (Todarodes pacificus) based on the abundance of trawl-caught juveniles |
title_fullStr |
Forecasting the stock size of the autumn cohort of Japanese common squid (Todarodes pacificus) based on the abundance of trawl-caught juveniles |
title_full_unstemmed |
Forecasting the stock size of the autumn cohort of Japanese common squid (Todarodes pacificus) based on the abundance of trawl-caught juveniles |
title_sort |
forecasting the stock size of the autumn cohort of japanese common squid (todarodes pacificus) based on the abundance of trawl-caught juveniles |
publisher |
Universidad Autónoma Metropolitana |
publishDate |
2016 |
url |
https://hidrobiologica.izt.uam.mx/index.php/revHidro/article/view/552 |
genre |
DML |
genre_facet |
DML |
op_source |
HIDROBIOLÓGICA; Vol. 24 Núm. 1 (2014); 23-31 2448-7333 0188-8897 |
op_relation |
https://hidrobiologica.izt.uam.mx/index.php/revHidro/article/view/552/143 https://hidrobiologica.izt.uam.mx/index.php/revHidro/article/view/552 |
op_rights |
Derechos de autor 2016 HIDROBIOLÓGICA |
_version_ |
1766397663659425792 |