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Jannsens - Morandi, Introductio biblica seu hermeneutica sacra, Marietti, Torino, 1937.

Authors
Publisher
Catholic Faculty of Theology, University of Zagreb; [email protected]
Publication Date
Disciplines
  • Biology

Abstract

actaAdriat47(1).indd Sexual dimorphism in the head, mouth, and body morphology of the smallspotted catshark, Scyliorhinus canicula (Linnaeus, 1758) (Chondrichthyes: Scyliorhinidae) from Turkey Halit FİLİZ and Ertan TAŞKAVAK* Ege University, Faculty of Fisheries, Department of Basic Sciences, 35100 İzmir, Turkey *Corresponding author, e-mail: [email protected] Males of the smallspotted catshark, Scyliorhinus canicula, have a longer and narrower mouth than females, resulting in pronounced sexual dimorphism. The length/width ratio of the mouth is 0.55 in males and 0.50 in females. Other head measurements also significantly differ between the sexes, i.e., the snout-spiracle and snout-pectoral distances. Body measurements that differ between the sexes include pelvic to anal, pectoral inner edge, pelvic to median tip, upper caudal, and total body lengths. Reasons for these differences are discussed. Key words: Scyliorhinus canicula, Elasmobranchii, sexual dimorphism, meristic, nanism ISSN: 0001-5113 AADRAY ACTA ADRIAT., 47 (1): 37 - 47, 2006 UDC: 597.33:591.156 591.156:597.33 Original scientific paper INTRODUCTION The smallspotted catshark, Scyliorhinus canicula Linnaeus, 1758 (Family: Scylio rhi- nidae), is an Atlantic-Mediterranean demersal species that inhabits continental shelves and uppermost slopes. It is found on sandy, coralline, algal, gravel, or muddy bottoms at depths of 3- 400 m (HUREAU & MONOD, 1973; CAPAPÉ, 1977; JARDAS, 1979; WHITEHEAD et al., 1984; FROESE & PAULY, 2004). The species is common in the Mediterranean (CAPAPÉ, 1977; JARDAS, 1979; CIHANGIR et al., 1997; BERTRAND et al., 2000; BAINO & SERENA, 2000; DE MADDALENA & BAENSCH, 2005) and widespread in the northeast Atlantic (WHITEHEAD et al., 1984). Studies of the lesser spotted dogfish relate to biology (FAURE-FREMIET, 1942; CAPAPÉ, 1977; JARDAS, 1979; CIHANGIR et al., 1997), age and growth (RODRIGUEZ-CABELLO et. al., 1997; RODRI- GUEZ-CABELLO & SÁNCHEZ, 2002), r

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