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Population dynamics of Indian mackerel Based on data from Mangalore during 1967-1975

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Relation http://eprints.cmfri.org.in/511/
 
Title Population dynamics of Indian mackerel
Based on data from Mangalore during 1967-1975
 
Creator Yohannan, T M
 
Subject Mackerel fishery
Population Dynamics
 
Description The total mortality rate (Z), as on data collected at Mangalore
during 1967-75, ranged between 2.54 and 6.21. Since the total mortality had no
regression on Ashing intensity the natural mortality rate (M) was calculated as
1.5 from the effective life span of mackerel. K,t„ and WQ, values were estimated
based on the growth in weight. The studies indicated that mackerel can withstand
heavy fishing mortalities (F) and the value of F that gives the maximum yield is
6.00. The recommended age at entry into the exploited phase ( t . ) is 8 months
instead of the present 6 months. Increasing the F value to 6.00 and tp. to 8 months
it is found that the existing quantity of the average standing stock can give an
average annual catch of 1,98,870 tonnes instead of the present 96,451 tonnes.
 
Publisher CMFRI/ICAR
 
Date 1982
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Identifier http://eprints.cmfri.org.in/511/1/Article_08.pdf
Yohannan, T M (1982) Population dynamics of Indian mackerel Based on data from Mangalore during 1967-1975. Indian Journal of Fisheries, 29 (1&2). pp. 50-62.