Synopsis
We observed predation of demersal fish eggs by the clingfish Pherallodichthys meshimaensis on the shallow reefs of Kuchierabu-jima Island, southern Japan. The processes of egg predation varied with the target species. For targeting of eggs of the combtooth blenny Istiblennius edentulus, up to 65 individuals of the clingfish gathered around the I. edentulus nest hole. Some individuals succeeded in intruding into the hole and fed on eggs while the egg-guarding male of I. edentulus temporarily left the nest. For targeting of eggs of the triplefin blenny Helcogramma obtusirostris, solitary clingfish individuals closely approached spawning females of H. obtusirostris at nests on open surfaces of rocks. Most clingfish contained only fish eggs in their diets, and these fish-egg eaters had larger body sizes than individuals that mainly fed on harpacticoid crustacea. Thus, P. meshimaensis may change its feeding habits when growing to an obligate fish-egg eater targeting demersal egg spawners.
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Hirayama, S., Shiiba, T., Sakai, Y. et al. Fish-egg predation by the small clingfish Pherallodichthys meshimaensis(Gobiesocidae) on the shallow reefs of Kuchierabu-jima Island, southern Japan. Environ Biol Fish 73, 237–242 (2005). https://doi.org/10.1007/s10641-005-2260-2
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DOI: https://doi.org/10.1007/s10641-005-2260-2