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Density and reproduction of the Queen Conch Eustrombus gigas (Mesogastropoda: Strombidae) at Cabo Cruz, Desembarco del Granma National Park, Cuba
A study at Cabo Cruz, Desembarco del Granma National Park, Cuba, reveals that the queen conch (Eustrombus gigas) population exhibits seasonal variations in density and reproduction. The highest density (468.5 ind./ha) was observed during cold fronts, while the lowest (268.5 ind./ha) occurred in the dry season. Laguna area showed the highest density (520.4 ind./ha), whereas Farito had the lowest (290.9 ind./ha). Reproductive activity, totaling 158 events, was most frequent during the rainy season (36%), with mating and egg-laying influenced by temperature and photoperiod. The population appears self-sufficient for recruitment year-round, suggesting sustainable exploitation is possible if managed through functional zoning, fishing area rotation, and a closed season. Laguna should be protected as a reproduction zone.
Density and reproduction of the Queen Conch Eustrombus gigas (Mesogastropoda: Strombidae) at Cabo Cruz, Desembarco del Granma National Park, Cuba
A significant queen conch (Eustrombus gigas) population exists in the Southeastern region of Cuba, with sustainable exploitation viable through targeted management. The study, conducted at Cabo Cruz, Desembarco del Granma National Park from 2009-2010, found the highest density during cold fronts (468.5 ind./ha), particularly at Laguna (520.4 ind./ha). Reproductive activity occurred year-round, peaking in the rainy season (36%), indicating a self-sufficient population for recruitment. Researchers recommend protecting Laguna as a no-fishing reproduction zone and implementing functional zoning, fishing area rotation, and a closed season to ensure sustainable management.
Density and Structure of a Queen ConchStrombus gigas(Mollusca: Strombidae) Population at Desembarco del Granma National Park, Cabo Cruz, Cuba.
A queen conch population at Desembarco del Granma National Park, Cuba, exhibits density-dependent stunting, with high densities (up to 1767 ind.ha-1) leading to smaller-than-expected sizes. The study found that while 73% of conchs had fully formed lips, they measured less than the minimum fishing size (200 mm SL), suggesting a 'dwarf' population. Research across three zones and climatic periods revealed aggregated distributions and seasonal density variations, with the highest densities during the dry season. These findings highlight the need for revised management plans to ensure sustainable use of this protected area's conch resources.
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