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Environmental influence on the behaviour of Indian mackerel and their availability to fishing gear along the Malabar coast

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Relation http://eprints.cmfri.org.in/175/
 
Title Environmental influence on the behaviour of
Indian mackerel and their availability to fishing
gear along the Malabar coast
 
Creator Yohannan, T M
Abdurahiman, U C
 
Subject Fish behaviour
 
Description The upwelling phenomenon observed along the Malabar coast regularly from
March to October, produces a plankton bloom. This helps in increasing the
reproductive output of mackerel and effect successful spawning and recruitment.
During the monsoon period the new recruits concentrate at the surface
as the thermocline is very shallow. During this period they become highly
vulnerable to the surface gear. With the sinking of thermocline they move to
deeper waters reducing their vulnerability. Mackerel prefers a temperature
around 27°C and hence stays immediately above the thermocline. Hence, there
is a demersal phase in the life history of the fish during summer. The fish
is a prolific breeder always ready to make use of a favourable environment
for spawning.
 
Publisher CMFRI/ICAR
 
Date 1998
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Identifier http://eprints.cmfri.org.in/175/1/Article_04.pdf
Yohannan, T M and Abdurahiman, U C (1998) Environmental influence on the behaviour of Indian mackerel and their availability to fishing gear along the Malabar coast. Indian Journal of Fisheries, 45 (3). pp. 239-247.