Sciaenid fishery off Visakhapatnam with some aspects of population dynamics of Johnius carutta (Bloch)


133 / 69

Authors

  • U Rajkumar Regional Centre of Central Marine Fisheries Research Institute, Pandurangapuram, Visakhapatnam 530003
  • K Narayana Rao Regional Centre of Central Marine Fisheries Research Institute, Pandurangapuram, Visakhapatnam 530003
  • H Jose Kingsley Regional Centre of Central Marine Fisheries Research Institute, Pandurangapuram, Visakhapatnam 530003

Abstract

The average annual catch of sciaenids by small-mechanized units operated off Visakhapatnam was 465 t, which formed 5.76% of the total landings. Of the thirteen species of sciaenids landed, Johnius carutta and Nibea maculata dominated the fishery. The estimated asymptotic length (Lâˆ) and growth constant (K-year) of J. carutta were 295 mm and 0.40, respectively. The size at first maturity was 154 mm and the spawning season was during March - May. The mortality rates Z, F and M were 3.02, 2.05 and 0.97 respectively. The exploitation rate of 0.68 indicated heavy exploitation of the species. The yield/ recruit curves showed that the exploitation rate could be brought down to E max (0.57) without affecting the catch.

Downloads

Download data is not yet available.

Author Biographies

  • U Rajkumar, Regional Centre of Central Marine Fisheries Research Institute, Pandurangapuram, Visakhapatnam 530003
    Regional Centre of Central Marine Fisheries Research Institute,
    Pandurangapuram, Visakhapatnam 530003
  • K Narayana Rao, Regional Centre of Central Marine Fisheries Research Institute, Pandurangapuram, Visakhapatnam 530003
    Regional Centre of Central Marine Fisheries Research Institute,
    Pandurangapuram, Visakhapatnam 530003
  • H Jose Kingsley, Regional Centre of Central Marine Fisheries Research Institute, Pandurangapuram, Visakhapatnam 530003
    Regional Centre of Central Marine Fisheries Research Institute,
    Pandurangapuram, Visakhapatnam 530003

Downloads

Issue

Vol. 51 No. 3 (2004)

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

Rajkumar, U., Rao, K. N., & Kingsley, H. J. (2011). Sciaenid fishery off Visakhapatnam with some aspects of population dynamics of Johnius carutta (Bloch). Indian Journal of Fisheries, 51(3), 311-318. https://epubs.icar.org.in/index.php/IJF/article/view/7208