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Free Content Some Aspects of the Reproduction of Panulirus Penicillatus (Decapoda: Palinuridae)

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Abstract:

Histological analysis of the ovaries of Panulirus pencillatus Oliver and the monthly incidence of egg-bearing females in the landed catch indicated that the species breeds practically throughout the year in San Vicente, Cagayan, Philippines. However, the height of reproduction occurred during the summer months (March‐June). Simultaneous breeding of a wider size range of females and rapid repetitive breeding were evident during these months. The progressive increase in the incidence of redeveloping gonads and the longer breeding season of larger females indicated that the capacity to produce more broods per year increased with size up to about 90 mm CL. This further increases the proportionately greater contribution of larger lobsters to the reproductive potential of the population. Marked allometric growth of the third walking legs of males suggests that functional sexual maturity is attained by males at a size of about 70 mm CL. Most females are potentially mature between 45–49.9 mm CL. The smaller size at sexual maturity of this population compared with other populations of the same species in other localities, implies lower growth rate in the study area.

Document Type: Research Article

Publication date: September 1, 1987

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