Rheotaxis in Otocinclus sp. (Teleostei: Loricariidae)

Autor: R. W. Blake, A. J. Macdonnell
Rok vydání: 1990
Předmět:
Zdroj: Canadian Journal of Zoology. 68:599-601
ISSN: 1480-3283
0008-4301
DOI: 10.1139/z90-086
Popis: Observations were conducted to determine rheotaxic behavior in Otocinclus sp. (Loricariidae). Rheotaxis in Otocinclus sp. (standard length 2.29–3.34 cm) occurs in three stages; (i) resting at zero water velocity; (ii) adhesion when water velocities are increased to about 10 cm s−1; and (iii) clamped position when slipping occurs (between 19 and 35 cm s−1). Rheotaxis also occurred on rougher surfaces without displacement for water velocities up to 70 cm s−1. Slipping velocities are maximized by morphological and behavioral characteristics that allow for the maintenance of position in rapidly moving water.
Databáze: OpenAIRE