Fanning behavior of three-spined stickleback Gasterosteus aculeatus and its interruption by the wandering of a non-indigenous red swamp crayfish(18.3MB, 00:01:12)Shot Date: 2005/03/16 Shot Location: 'Honganshozu', Itoyo-town, Ono, Fukui, Japan | ||
| species Gasterosteus aculeatus (freshwater type) Key Words | ||
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Animalia >Chordata >Osteichthyes >Gasterosteiformes >Gasterosteidae >Gasterosteus >
A male is actively fanning eggs to help embryos hatch. When the male sees a red-swamp crayfish wandering around the nest, it stops fanning and faces the crayfish. It then resumes fanning. The fanning was interrupted in this manner three times. It is likely that the red body color of the crayfish triggers threat behavior in the male and hence makes the male stop fanning.
At Hongan-shimizu, crayfish break nests of the three-spined sticklebacks while they are wandering around the bottom. Even when crayfish are not breaking the stickleback nests, their presence may affect the reproduction of the three-spined sticklebacks by interrupting male parental behavior.
(This video picture was prepared by ¡ÆFriends of Fukui City Museum of Natural History during a project ¡ÆEducational Videos on the Three-spined Stickleback.¡Ç http://www.nature.museum.city.fukui.fukui.jp/friends/itoyo/)
(translated by Asoh)
(Data No.momo051103ga05b)
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