Reproductive biology of the lumpsucker fish Lethotremus awae in Shizugawa Bay, northern Honshu, Japan
2009
Abe, T., Hokkaido Univ., Hakodate (Japan). Faculty of Fisheries Sciences | Sato, N.
Reproductive patterns in the lump sucker fish Lethotremus awae were investigated by field observations and histological analyses. Males guarded egg masses in empty shells of the ribbed barnacle Balanus rostratus or in an empty hole, bored in offshore rocks by the boring bivalve Penitella kamakurensis, at 7-17mm water depth. The number of egg batches per nest was ranged 1-5, and the number of eggs per batch was 66-133. Eggs shaped sphere with 1.6 to 1.9 mm diameter and adhered to each other. Histological observation on ovaries indicated that females are multiple spawners within a single mating season. The male first dorsal fin was enlarged and crown-like, being a conspicuous feature of sexual dimorphism.
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