Effect of riverbed substrates on the formation of spawning male school in Japanese minnow Phoxinus lagowski

Fujimoto Y., Chiba H., Iwata M.

Date de parution: juillet 2008
Volume: 32
Number: 2 suppl.
Pagination: 319
Editeur: Société Française d'Ichtyologie
doi: https://doi.org/10.26028/cybium/2008-322SP-158

Japanese fat minnows form spawning schools composed of spermiating males, at the gravel bottom in streams. Males were placed in tanks with various substrates at the bottom: gravel, mud, stone, or concrete. Water in the tanks was drawn to a Y-maze tank to observe behavioural responses of the males. The males stayed in water from the gravel- laid tank. Results suggest that gravel is an important factor to induce formation of the spawning school of the minnow.

Mots-clés: Gravel - Minnow - Spawning School
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