Eye lens diameter and weight as an age indicator in two sparid fishes off Benghazi coasts, Libya


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Authors

  • L A J Al Hassan School of Biological Sciences, The University of Auckland, Private Bag 9201, Auckland, New Zealand
  • F F El Toumy Zoology Dept., Faculty of Science, Garyounis University, Benghazi, Libya
  • O A El Silini Zoology Dept., Faculty of Science, Garyounis University, Benghazi, Libya
  • H El Burasi Zoology Dept., Faculty of Science, Garyounis University, Benghazi, Libya

Abstract

The eye lens diameter and weight in the sparid fishes, Boops boops and Diplodus
annularis, were tested for their vahdity as age indicators. The results showed
that the eye lens diameter in B. boops could be used to differentiate fishes in their
2"'' and 3"' years of life from those of the 1*" and 2"'' year classes. On the other
hand, in D. annularis, this technique succeeded to differentiate S"' and 2"^ year
classes. Eye lens weight technique proved well to differentiate fishes in the 0
and 1 year class of B. boops from the remaining age groups. On the other hand,
it proves not a good criterion to differentiate among the fish age groups of D.
annularis except for l'''^ and 3'''' year classes.

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Author Biographies

  • L A J Al Hassan, School of Biological Sciences, The University of Auckland, Private Bag 9201, Auckland, New Zealand
    School of Biological Sciences, The University of Auckland, Private Bag 9201,
    Auckland, New Zealand
  • F F El Toumy, Zoology Dept., Faculty of Science, Garyounis University, Benghazi, Libya
    Zoology Dept., Faculty of Science, Garyounis University, Benghazi, Libya
  • O A El Silini, Zoology Dept., Faculty of Science, Garyounis University, Benghazi, Libya
    Zoology Dept., Faculty of Science, Garyounis University, Benghazi, Libya
  • H El Burasi, Zoology Dept., Faculty of Science, Garyounis University, Benghazi, Libya
    Zoology Dept., Faculty of Science, Garyounis University, Benghazi, Libya

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Issue

Vol. 46 No. 4 (1999)

Section

Articles

License

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

Al Hassan, L. A. J., El Toumy, F. F., El Silini, O. A., & El Burasi, H. (2011). Eye lens diameter and weight as an age indicator in two sparid fishes off Benghazi coasts, Libya. Indian Journal of Fisheries, 46(4), 345-349. https://epubs.icar.org.in/index.php/IJF/article/view/8580