> Water velocities in this river change rapidly with precipitation, but at
>some places and times I recorded velocities of around 60 cm/sec.
>Free-swimming young of the species I study (Cichlasoma tuba, TL = roughly
>1 cm to 1.5cm) were maintaining position in these currents (with some
>difficulty). This comes out to 40 to 60 body lengths per second of
>sustained swimming (for at least a few days before the water slowed down).
>This seems pretty high to me in comparison to the values I seem to be
>encountering in the literature.
>My question: is this unusually athletic or are there other fish doing
>similar things? Any pointers would be gratefully received.
There is a good published paper on critical swimming speed on fry from a
sister? family (Pomacentrids),
Stobutzki I, Bellwood DR. 1994. An analysis of the sustained swimming
abilities of pre- and post-settlement coral reef fishes. Journal of
Experimental Marine Biology and Ecology 175: 275-296.
Stobutzki and Bellwood found swimming speeds comparable to your guestimate
in similar sized pomacentrid larvae.
Dept. of Zoology
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