Bohlen, J.

Differences in clutch size, egg size and larval pigmentation between Cobitis taenia and C. bilineata (Cobitidae)

Italian Journal of Zoology 65, Suppl.: 219-221

Italian Journal of Zoology 65, Suppl.: 219-221 (1998)

Differences in clutch size, egg size and larval pigmentation between Cobitis taenia and C. bilineata (Cobitidae)

Bohlen J.

Abstract

A comparison of spawning features, eggs and larvae between spined loach from Northern Italy and Northern Germany revealed differences in egg size, cluch size and number of portions per female. Larvae differ in the presence of a ventral pigment row in C. taenia, which is absent in C. bilineata. Two invariable morphs of pigmentation intensity occur in C. bilineata larvae while in larvae of C. taenia one morph was observed. In combination with results reported by other authors the presented differences suggest that the two taxa are different species.

Key words: Cobitis, larval fish systematics, reproductive biology,