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Studies on the age and growth of the oil-sardine Sardinella longiceps Val. by means of scales

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Title Studies on the age and growth of the oil-sardine
Sardinella longiceps Val. by means of scales
Not Available
 
Creator Balan,V
 
Subject age
growth
oil-sardine
Sardinella longiceps
 
Description Not Available
A sound knowledge of age and growth of fishes is of prime importance
in the management and forecast of their fisheries. Conflicting views have
been expressed regarding the age and the life span of the oil-sardine based on
the studies of the growth-checks of its scales, otoliths and the length-frequency.
Hornell and Nayudu (1923) concluded that the fish attains sexual maturity and
adult size of 15 cm. at the end of one year and that the life span of the oil sardine
is limited to 2\ years, based on the growth-rings .of the scales. Devanesan
(1943) detected the, first growth ring on the scales of fish of 6.5 cm. in length
and six of them in fish of 8.7 cm., and. suggested that nine and fourteen "rings"
may be expected in the fish of 15 and 18 cm. group respectively and that the
fish might live for fourteen years, ^air (1949), working on the oil-sardine
otoliths, stated that the fish live for three years; and later (1952) stated that
it is probable that the growth-checks detected on the otoliths of the oil-sardine,
especially the first two, are formed during the summer when the phytoplankton is
scarce and that the third ring formed in some is either due to the same cause or
due to the suspension of their feeding activity during spawning. Nair (1960),
in a review, suggested that the average life span of the fish is "about 3 to 4
years." Chidambaram (1950) studied the length-frequency of the fish and concluded
that its life span is four years. For resolving the' above-said divergences
of views on age and growth it was felt desirable to undertake a detailed study of
its scales; and, therefore, the scale data and the length-frequency data were
simultaneously collected at Calicut and Cochin. Balan (1959) in a preliminary
note based on scale-studies and length frequency data indicated that the biggest
fish have, without doubt, completed three years of their life.
Not Available
 
Date 2021-09-18T04:46:14Z
2021-09-18T04:46:14Z
1964
 
Type Article
 
Identifier Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/64409
 
Language English
 
Relation Not Available
 
Publisher CMFRI/ICAR