Age and growth of blue spot mullet, Valamugil seheli (Forskal) from Mangalore


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Authors

  • K S Venkatesha Moorthy Department of Fisheries Resources and Management, College of Fisheries, Matsyanagar, Mangalore-575 002, Karnataka, India
  • H R V Reddy Department of Fisheries Resources and Management, College of Fisheries, Matsyanagar, Mangalore-575 002, Karnataka, India
  • T S Annappaswamy Department of Fisheries Resources and Management, College of Fisheries, Matsyanagar, Mangalore-575 002, Karnataka, India

Abstract

Length-weight relationship, condition, age and growth and mortality rates of
Valamugil seheli from Mangalore region were studied during April 1998 and
March 1999. The combined length-weight relationship derived was log W = -
1.4257+2.6207 logL and the growth was found to be allometric. Seasonal variation in condition factor showed higher values from September to December, while the mean values of Kn showed an increasing trend with size. Studies on age and growth revealed that males grow faster than females and the von- Bertalanffy growth equation was Lt = 601.76 [l-e -0.2309(t+0.6934)] for males and Lt = 534.53 [l-e -0.2853(t+0.5632)] for females. The instantaneous total, natural and fishing mortality were found to be 1.5060, 0.9713 and 0.5347 for males and 1.3384, 0.9004 and 0.4380 for females respectively.

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Author Biographies

  • K S Venkatesha Moorthy, Department of Fisheries Resources and Management, College of Fisheries, Matsyanagar, Mangalore-575 002, Karnataka, India
    Department of Fisheries Resources and Management, College of Fisheries,
    Matsyanagar, Mangalore-575 002, Karnataka, India
  • H R V Reddy, Department of Fisheries Resources and Management, College of Fisheries, Matsyanagar, Mangalore-575 002, Karnataka, India
    Department of Fisheries Resources and Management, College of Fisheries,
    Matsyanagar, Mangalore-575 002, Karnataka, India
  • T S Annappaswamy, Department of Fisheries Resources and Management, College of Fisheries, Matsyanagar, Mangalore-575 002, Karnataka, India
    Department of Fisheries Resources and Management, College of Fisheries,
    Matsyanagar, Mangalore-575 002, Karnataka, India

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Issue

Vol. 50 No. 1 (2003)

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

Moorthy, K. S. V., Reddy, H. R. V., & Annappaswamy, T. S. (2011). Age and growth of blue spot mullet, Valamugil seheli (Forskal) from Mangalore. Indian Journal of Fisheries, 50(1), 73-79. https://epubs.icar.org.in/index.php/IJF/article/view/7352