Fisheries and Aquatic Sciences

The Korean Society of Fisheries and Aquatic Science (한국수산과학회)
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Fisheries in Geray Reservoir could be managed using biometric and reproductive characteristics of the Common carp (Cyprinus carpio L. 1758)

  • Received : 2023.09.20
  • Accepted : 2024.01.12
  • Published : 2024.06.30
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Abstract

This study looked at some biometric and reproductive aspects of the Common carp (Cyprinus carpio) - the overexploited fish species in the Geray Reservoir as a foundation to develop an efficient fisheries management strategy. 50 fish samples (20 to 44 cm and 130 to 2,400 g) were collected between October and May 2022 using a cast net with a mesh size of 6 cm. The ratio of male to female C. carpio (1:0.52) was deviating from the anticipated 1:1 ratio. The absolute fecundity of C. carpio was relatively low (12,375 to 31,392 eggs). Gonadosomatic index varied from 0.01 to 4.6 (male) to 0.24-12.75 (female), and the spawning period of C. carpio extended from December to January. The length-weight relationships for males (TW = 0.0009TL3.87) and females (TW = 0.0007L3.97) indicate that C. carpio had positive allometric growth; which may have been caused by unsuitable habitat conditions and overfishing. There is a need to develop fisheries management like implementing integrated conservation efforts and reducing wetland farming. For this, this information provides a baseline data.

Keywords

Acknowledgement

The authors are grateful to Debre Markos University for its laboratory aid.

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