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Reproductive strategy of leafscale gulper shark Centrophorus squamosus and the Portuguese dogfish Centroscymnus coelolepis on the Portuguese continental slope

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Recent data are presented on leafscale gulper shark Centrophorus squamosus and Portuguese dogfish Centroscymnus coelolepis collected during an extended sampling programme carried out at mainland Portuguese landing ports. Although there are some features common to all deep-water squaliform sharks, the two species have different reproductive strategies: C. squamosus has a lower fecundity and larger total length (LT) at first maturity than C. coelolepis. Despite the scarcity of pregnant C. squamosus in the samples, the LT at birth was estimated at c. 440 mm. For C. coelolepis the results suggest the existence of a non-annual reproductive cycle with two breeding seasons in each year.
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Keywords: deep-water sharks; embryo; fecundity; length at first maturity; reproductive strategy

Document Type: Regular Paper

Affiliations: Departamento de Biologia Animal & Instituto de Oceanografia, Faculdade de Ciências de Lisboa, Bloco C2, Campo Grande, 1749–016 Lisboa, Portugal

Publication date: 2008-07-01

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