Article 6
Maturity, fecundity and occurrence of the smallspotted catshark Scyliorhinus canicula (Chondrichthyes: Scyliorhinidae) off the Languedocian coast (southern France, north-western Mediterranean)
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ABSTRACT.– The smallspotted catshark, Scyliorhinus canicula (Linnaeus, 1758) presents a wide Atlanto-Mediterranean distribution, it is commonly captured off the Languedocian coast (southern France, north-western Mediterranean). The male and female sexually matured between 430-440 mm and 410-450 mm total length (TL), respectively. The largest male and female were 550 mm and 510 mm TL, respectively and weighed 472 g and 527 g, respectively. The relationships between TL and total mass, and TL and liver mass are significantly different considering males and females. Diameter of the largest yolky oocytes ranged from 14 to 18 mm (mean ± SD = 14.8 ± 2.7 mm) and weighed from 1.4 to 1.8 g (mean ± SD = 1.6 ± 0.1 g). Production of egg cases was observed throughout the year, except in September. Egg cases had between 41 and 58 mm (mean ± SD = 47.1 ± 3.7 mm) in length, and between 16 and 20 mm (mean ± SD = 18.3 ± 1.2 mm) in width, and they weighed between 4.1 and 5.9 g (mean ± SD = 4.5 ± 0.3 g). Fecundity remained difficult to assess, an estimation based on production of egg cases the yolky oocytes by females, enabled us to consider it between 38 and 115.