Age Composition and Prediction of Optimum Fishing Mortality (Fmsy) for the Beluga, Stellate Sturgeon, Persian Sturgeon and Russian Sturgeon in the South Part of the Caspian Sea
Eight years (1990-1997) of the Beluga, Stellate Sturgeon, Persian Sturgeonand Russian Sturgeon in the south part of the Caspian Sea were analyzed for age composition. Yield-per-recruit curves were derived for each species based on growth parameters and mortality rates, and the optimum fishing mortal...
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Iranian Fisheries Research Organization
1998
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ftdoajarticles:oai:doaj.org/article:bba36f0ede824013a2e1f14281d47370 2023-05-15T15:41:37+02:00 Age Composition and Prediction of Optimum Fishing Mortality (Fmsy) for the Beluga, Stellate Sturgeon, Persian Sturgeon and Russian Sturgeon in the South Part of the Caspian Sea A. Taghavi 1998-01-01T00:00:00Z https://doaj.org/article/bba36f0ede824013a2e1f14281d47370 FA per Iranian Fisheries Research Organization http://isfj.areo.ir/article_116391_en.html https://doaj.org/toc/1026-1354 https://doaj.org/toc/2322-5998 1026-1354 2322-5998 https://doaj.org/article/bba36f0ede824013a2e1f14281d47370 Majallah-i ̒Ilmī-i Shīlāt-i Īrān, Vol 8, Iss 4, Pp 1-28 (1998) age groups stock Agriculture S Aquaculture. Fisheries. Angling SH1-691 article 1998 ftdoajarticles 2022-12-31T14:02:11Z Eight years (1990-1997) of the Beluga, Stellate Sturgeon, Persian Sturgeonand Russian Sturgeon in the south part of the Caspian Sea were analyzed for age composition. Yield-per-recruit curves were derived for each species based on growth parameters and mortality rates, and the optimum fishing mortality in terms of yield-per-recruit was calculated as a basis for sturgeon fishery management in the Caspian Sea. The results of eight years catches from this part of the Caspian Sea show that the age structure of all species has changed and a trend to become younger for fish of both sexes is apparent.On the other hand, fishing composition, is confied to some special age groups. Inspection of yield-per-recruit model confirms the overfishing of the strugeons in the Caspian Sea and suggested that the fishing mortality showed be reduced by decreasing fishing effort. It seems that the population of the Beluga, probably because of the higher quality of its caviar, are more depleted, therefore inorder to maintain the spawning stock, the harvesting of Beluga showed be much restricted for several years. Article in Journal/Newspaper Beluga Beluga* Directory of Open Access Journals: DOAJ Articles |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
Persian |
topic |
age groups stock Agriculture S Aquaculture. Fisheries. Angling SH1-691 |
spellingShingle |
age groups stock Agriculture S Aquaculture. Fisheries. Angling SH1-691 A. Taghavi Age Composition and Prediction of Optimum Fishing Mortality (Fmsy) for the Beluga, Stellate Sturgeon, Persian Sturgeon and Russian Sturgeon in the South Part of the Caspian Sea |
topic_facet |
age groups stock Agriculture S Aquaculture. Fisheries. Angling SH1-691 |
description |
Eight years (1990-1997) of the Beluga, Stellate Sturgeon, Persian Sturgeonand Russian Sturgeon in the south part of the Caspian Sea were analyzed for age composition. Yield-per-recruit curves were derived for each species based on growth parameters and mortality rates, and the optimum fishing mortality in terms of yield-per-recruit was calculated as a basis for sturgeon fishery management in the Caspian Sea. The results of eight years catches from this part of the Caspian Sea show that the age structure of all species has changed and a trend to become younger for fish of both sexes is apparent.On the other hand, fishing composition, is confied to some special age groups. Inspection of yield-per-recruit model confirms the overfishing of the strugeons in the Caspian Sea and suggested that the fishing mortality showed be reduced by decreasing fishing effort. It seems that the population of the Beluga, probably because of the higher quality of its caviar, are more depleted, therefore inorder to maintain the spawning stock, the harvesting of Beluga showed be much restricted for several years. |
format |
Article in Journal/Newspaper |
author |
A. Taghavi |
author_facet |
A. Taghavi |
author_sort |
A. Taghavi |
title |
Age Composition and Prediction of Optimum Fishing Mortality (Fmsy) for the Beluga, Stellate Sturgeon, Persian Sturgeon and Russian Sturgeon in the South Part of the Caspian Sea |
title_short |
Age Composition and Prediction of Optimum Fishing Mortality (Fmsy) for the Beluga, Stellate Sturgeon, Persian Sturgeon and Russian Sturgeon in the South Part of the Caspian Sea |
title_full |
Age Composition and Prediction of Optimum Fishing Mortality (Fmsy) for the Beluga, Stellate Sturgeon, Persian Sturgeon and Russian Sturgeon in the South Part of the Caspian Sea |
title_fullStr |
Age Composition and Prediction of Optimum Fishing Mortality (Fmsy) for the Beluga, Stellate Sturgeon, Persian Sturgeon and Russian Sturgeon in the South Part of the Caspian Sea |
title_full_unstemmed |
Age Composition and Prediction of Optimum Fishing Mortality (Fmsy) for the Beluga, Stellate Sturgeon, Persian Sturgeon and Russian Sturgeon in the South Part of the Caspian Sea |
title_sort |
age composition and prediction of optimum fishing mortality (fmsy) for the beluga, stellate sturgeon, persian sturgeon and russian sturgeon in the south part of the caspian sea |
publisher |
Iranian Fisheries Research Organization |
publishDate |
1998 |
url |
https://doaj.org/article/bba36f0ede824013a2e1f14281d47370 |
genre |
Beluga Beluga* |
genre_facet |
Beluga Beluga* |
op_source |
Majallah-i ̒Ilmī-i Shīlāt-i Īrān, Vol 8, Iss 4, Pp 1-28 (1998) |
op_relation |
http://isfj.areo.ir/article_116391_en.html https://doaj.org/toc/1026-1354 https://doaj.org/toc/2322-5998 1026-1354 2322-5998 https://doaj.org/article/bba36f0ede824013a2e1f14281d47370 |
_version_ |
1766374517800697856 |