Morphology of the Sperm of two wrasses, Thalassoma bifasciatum and Lachnolaimus maximus (Labridae, Perciformes)
Abstract:The sperm of fishes are morphologically diverse, but broad-level relationships between morphology and mating pattern are apparent (Jamieson, 1991; Stockley et al., 1996, 1997). Significant questions about the extent and functional importance of this morphological diversity remain, however. The wrasses (Labridae) are a widely distributed, diverse group of fishes with an array of mating systems both among and within species, making them good subjects for the study of sperm morphology. The morphology of the sperm of labrids is poorly known, however, except for a few species (Lahnsteiner and Patzner, 1997; Schärer and Robertson, 1999). The bluehead wrasse, Thalassoma bifasciatum (Bloch), and the hogfish, Lachnolaimus maximus (Walbaum), are two relatively common wrasses living on and near the coral reefs of Florida and the Caribbean. These fishes are broadcast spawners that rush into the water column to release gametes. We describe the ultrastructure of the sperm of these two species.
Document Type: Short Communication
Publication date: 2003-01-01
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