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Seasonal abundance of small sized juvenile Rastrelliger kanagurta at Vizhingam during 1960-1963

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Title Seasonal abundance of small sized juvenile Rastrelliger
kanagurta at Vizhingam during 1960-1963
Not Available
 
Creator Sam Bennet,P
 
Subject juvenile abundance
Rastrelliger kanagurta
 
Description Not Available
The Indian mackerel, Rastrelliger kanagurta (Cuvier) occur in good numbers
along the east and west coast of India and is one of the most important
commercial fishes in Indian waters. Much of the research was done on the
west coast, where there is a considerable fishery for the mackerel. As in most
pelagic fishes there have been tremendous variations in yield. Catch in one
area of the coast has often differed markedly from that in other areas in the
same season, and periods of abundance have been followed by periods of
scarcity. This report presents a comprehensive picture of the seasonal abundance
and general biology of small sized juvenile mackerel based on observations
made at Vizhingam, the southern most centre in the 'mackerel zone' of the
west coast of India during 1960-63. The study serves as a basis for fixing
the spawning season and spawning periodicity of the Indian mackerel. Appearance
of shoals of juvenile mackerel in the inshore fishing grounds is discussed
in relation to the prevailing water temperature. Quantitative data on seasonal
abundance of juveniles may help in understanding the success or failure of
particular year classes and thus in finding reasons for fluctuations in abundance
and in developing ways to control the fluctuations. Fishable stocks of mackerel
during certain years have become depleted by the fishery to a point where
the annual production is well below what it could be, had the small sized
juveniles been allowed to grow. An attempt is made to evaluate the detrimental
effect of large scale fishing of small sized juveniles when they enter
into the fishing grounds. Brief observations on older fish sampled throughout
the year are also included.
Not Available
 
Date 2021-09-18T04:46:13Z
2021-09-18T04:46:13Z
1964
 
Type Article
 
Identifier Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/64398
 
Language English
 
Relation Not Available
 
Publisher CMFRI/ICAR