Effects of feeding on the sustained swimming abilities of late-stage larval Amphiprion melanopus

To date, all sustained swimming experiments on tropical reef fish larvae ha ve been conducted using unfed larvae. Such studies may produce unrealistic estimates of sustained swimming abilities. We examined the effect of food o n the sustained swimming ability of late-stage Amphiprion melanopus. Larvae were swum in a six-channel swimming flume at 7 cm s(-1), with "unfed" and "fed" channels. Fed channels had Artemia nauplii added four times per day f or 10 min. Feeding larvae during swimming experiments significantly increas ed their average swimming distance from around 6.9 to 12.2 km, and the maxi mum swimming distance from around 11.8 to 28.7 kin. Existing flume-based es timates of sustained swimming may be underestimating field abilities. With access to food, many larvae may have the potential to swim considerably gre ater distances than previously suggested.