Maturity and spawning of Osteobrama bakeri (Day) - a threatened


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Authors

  • C J Euphrasia St. Xavier’s College for Women, Aluva, Kerala, India
  • B Madhusoodana Kurup School of Industrial Fisheries, CUSAT, Kerala, India

Abstract

Maturity and spawning of

Osteobrama bakeri were studied during June 2001 to May 2003. O. bakeri

of Periyar River breeds

twice in a year, during April-June and October-November. Ripe males and gravid females were observed from September to

November and February to June. Ripe ovaries showed the presence of a wide size range of mature ova with indistinct minor

modes within the group, thus manifesting fractional spawning within the season. Largest oocytes of 966 μm in fully ripe

condition appeared in April and October. High gonadosomatic index (GSI) values were encountered in October and April

followed by a sudden drop in November and May. The males and females were found to mature at 115 and 118 mm respectively.

Sex ratio showed skewness in some of the months. Overall sex ratio showed significant dominance of males and the mean

ratio of males to females was 1:0.58.

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Issue

Vol. 55 No. 3 (2008)

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

Euphrasia, C. J., & Madhusoodana Kurup, B. (2011). Maturity and spawning of Osteobrama bakeri (Day) - a threatened. Indian Journal of Fisheries, 55(3), 273-280. https://epubs.icar.org.in/index.php/IJF/article/view/6898