Review of elasmobranch behavioral studies using ultrasonic telemetry with special reference to the lemon shark, Negaprion brevirostris, around Bimini Islands, Bahamas

摘要: A review of past behavioral ultrasonic telemetry studies sharks and rays is presented together with previously unpublished material on the behavior lemon shark, Negaprion brevirostris, around Bimini Islands, Bahamas. The review, focusing movement behaviors 20 shark three ray species, reveals that elasmobranchs exhibit a variety temporal spatial patterns in terms rates-of-movement vertical as well horizontal migrations. lack an apparent pattern few species probably attributable to scarcity tracking data. Movements are governed by several factors, some still not studied, but data show food, water temperature, bottom type, magnetic gradient play major roles shark's decision where when swim. differences between groups within same geographical area. This interesting finding warrants further research evaluate causes these whether constitute different subpopulations species. batoids orders must be addressed before we can gain more comprehensive understanding elasmobranch fishes. Previously from 47 smaller 38 larger juvenile sharks, collected over decade 1988–1998, provide new results patterns, habitat selection, activity rhythms, swimming speed, rate-of-movement, homing behavior. From conclude active predator strong, apparently innate mechanism. shows ontogenetic selection behavior, movements individuals We suggest hypotheses for future related topics will help understand enigmatic sharks.