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Gonad maturation and spawning times of Siganus sutor off the Kenya coast: evidence for definite spawning seasons in a tropical fish
Ntiba, M. J.; Jaccarini, V. (1990). Gonad maturation and spawning times of Siganus sutor off the Kenya coast: evidence for definite spawning seasons in a tropical fish. J. Fish Biol. 37(2): 315-325. dx.doi.org/10.1111/j.1095-8649.1990.tb05862.x
In: Journal of Fish Biology. Fisheries Society of the British Isles: London,New York,. ISSN 0022-1112, more
Peer reviewed article  

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Keyword
    Marine
Author keywords
    maturation cycle; spawning seasons; Siganus sutor

Authors  Top 
  • Ntiba, M. J.
  • Jaccarini, V.

Abstract
    The gonad maturation cycle of Siganus sutor (Valenciennes, 1835) (Osteichthyes-Siganidae) is described for both males and females using macroscopic criteria for the testes and both macroscopic and microscopic ones for staging the ovaries. Siganus suror has two major spawning seasons: one in January/February and the other in May/June. The presence of these seasons is established by (a) the temporal variations in the condition factor and in the relative weight of the gonads, (b) the progression of peaks of maturity stages with seasonal occurrence of spent fish in the samples, and (c) the seasonal appearance ofjuveniles. This is a significant result for a tropical marine fish.

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