STUDIES ON TKE SCALES OF PSEUDOSCIAENA DIACANTHUS (LACEPEDE) FOR ESTIMATING GROWTH PARAMETERS


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Authors

  • K Srinivasa Rao Central Marine Fisheries Research Institute, Sub-station, Bombay

Abstract

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.

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Author Biography

  • K Srinivasa Rao, Central Marine Fisheries Research Institute, Sub-station, Bombay
    Central Marine Fisheries Research Institute, Sub-station, Bombay

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Issue

Vol. 15 No. 1 & 2 (1968)

Section

Articles

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The copyright of the articles published in Indian Journal of Fisheries vests with the Indian Council of Agricultural Research, who has the right to enter into any agreement with any organization in India or abroad engaged in reprography, photocopying, storage and dissemination of information contained in these journals. The Council has no objection in using the material, provided the information is being utilized for academic purpose but not for commercial use. Due credit line should be given to the ICAR where information will be utilized.

How to Cite

Rao, K. S. (2011). STUDIES ON TKE SCALES OF PSEUDOSCIAENA DIACANTHUS (LACEPEDE) FOR ESTIMATING GROWTH PARAMETERS. Indian Journal of Fisheries, 15(1 & 2), 127-144. https://epubs.icar.org.in/index.php/IJF/article/view/13282