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 Sturgeon and 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 morta...
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Online Access: | http://hdl.handle.net/1834/12610 |
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ftoceandocs:oai:aquadocs.org:1834/12610 2023-05-15T15:41:33+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 Taghavi, S.A. Iran Caspian Sea 2000 pp.1-28 http://hdl.handle.net/1834/12610 fa per http://isfj.areo.ir/ 1026-1354 http://hdl.handle.net/1834/12610 Harvesting Fishing Mortality Beluga Stellate sturgeon Persian Sturgeon Russian Sturgeon Yield-per-recruit Species Growth Fishery Caviar Spawning Age Composition Journal Contribution Refereed 2000 ftoceandocs 2023-04-06T16:59:40Z Eight years (1990-1997) of the Beluga, Stellate Sturgeon, Persian Sturgeon and 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 confined to some special age groups. Inspection of yield-per-recruit model confirms the overfishing of the sturgeons 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 in order to maintain the spawning stock, the harvesting of Beluga showed be much restricted for several years. Published Book Beluga Beluga* IODE-UNESCO: OceanDocs - E-Repository of Ocean Publications |
institution |
Open Polar |
collection |
IODE-UNESCO: OceanDocs - E-Repository of Ocean Publications |
op_collection_id |
ftoceandocs |
language |
Persian |
topic |
Harvesting Fishing Mortality Beluga Stellate sturgeon Persian Sturgeon Russian Sturgeon Yield-per-recruit Species Growth Fishery Caviar Spawning Age Composition |
spellingShingle |
Harvesting Fishing Mortality Beluga Stellate sturgeon Persian Sturgeon Russian Sturgeon Yield-per-recruit Species Growth Fishery Caviar Spawning Age Composition Taghavi, S.A. 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 |
Harvesting Fishing Mortality Beluga Stellate sturgeon Persian Sturgeon Russian Sturgeon Yield-per-recruit Species Growth Fishery Caviar Spawning Age Composition |
description |
Eight years (1990-1997) of the Beluga, Stellate Sturgeon, Persian Sturgeon and 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 confined to some special age groups. Inspection of yield-per-recruit model confirms the overfishing of the sturgeons 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 in order to maintain the spawning stock, the harvesting of Beluga showed be much restricted for several years. Published |
format |
Book |
author |
Taghavi, S.A. |
author_facet |
Taghavi, S.A. |
author_sort |
Taghavi, S.A. |
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 |
publishDate |
2000 |
url |
http://hdl.handle.net/1834/12610 |
op_coverage |
Iran Caspian Sea |
genre |
Beluga Beluga* |
genre_facet |
Beluga Beluga* |
op_relation |
http://isfj.areo.ir/ 1026-1354 http://hdl.handle.net/1834/12610 |
_version_ |
1766374451141672960 |