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Studies on the scales of Pseudosciaena diacanthus (Lacepede) for estimating growth parameters

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Relation http://eprints.cmfri.org.in/1831/
 
Title Studies on the scales of Pseudosciaena diacanthus
(Lacepede) for estimating growth parameters
 
Creator Rao, K Srinivasa
 
Subject Sciaenids
 
Description The nature of the different types of growth checks on the scales of Pseudosciaena
diacanthus (ghol) has been described for faciUtating an easy identification of the
annular margins. The time of ring formation (transparent bands) was fouiid to be annual,
taking place during Fisbruary-April. It has been suggested that the ring formation on
the scales may not be due to growth-inhibiting factors.
Back-calculatiotis were made on the basis of total length — scale size relationship,
which was found to bi; a straight line after logarithmic transformation of the two variables.
The weighted mean length of all the fish examined was estimated to be 46.39,
64.13, 80.52, 93.44, 101.21 and 105.85 cm, at I + to VI + ages. The maximum age was
observed to be VII + years, of a fish measuring 127.0 cm. The results of the backcalculations
were checked with the mean lengths at different ages obtained by the length
frequency analysis. Ttie length composition was dominated by fish belonging to the
IV + age group, with the mean length ranging from 90.25 cm to 93.50 cm.
The logistic curve was found to describe the growth of 'ghol' most adequately. The
estimated L^^ was 118.01 cm for the logistic equation while it was 144.72 cm for the von
BertalanfFy growth eqiation.
 
Publisher CMFRI/ICAR
 
Date 1968
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Identifier http://eprints.cmfri.org.in/1831/1/Article_14.pdf
Rao, K Srinivasa (1968) Studies on the scales of Pseudosciaena diacanthus (Lacepede) for estimating growth parameters. Indian Journal of Fisheries, 15 (1&2). pp. 127-144.