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A report on the auditory capabilities and their associated functions of elasmobranch fishes along with a brief review of the physics of underwater sound as it relates to hearing by fishes is provided. The inner ears of elasmobranchs possess structures that are no different from other fishes, except for an enlarged macula neglecta, which is unique among(More)
Adults of three cichlid species, Hemichromis bimaculatus Gill, Cichlasoma nigrofasciatum (Gunther), and Pterophyllum sp., produce sounds of apparent biological significance. Both sexes of H. bimaculatus produce sounds, but whether both sexes in the other species produce sounds has not been established. The most intense tone frequencies in H. bimaculatus and(More)
1. Audiograms were established for six closely related damselfishes of the cosmopolitan genus,Eupomacentrus, from the waters of southern Florida:E. diencaeus, E. dorsopunicans, E. leucostictus, E. mellis, E. planifrons, andE. variabilis. These were then compared with a previously established audiogram forE. partitus, the final remaining congeneric found in(More)
The effect of predator exposure on brain serotonin utilization was studied in bicolour damselfish (Pomacentrus partitus). Predator exposure (lasting 2 h), which took place in an aquarium where a transparent wall separated the damselfish from the predator (a graysby, Epinephelus cruentatus), resulted in increased concentrations of 5-hydroxyindoleacetic acid(More)
Bicolor damselfish were allowed to interact in pairs for 15 min a day during a five-day period. Agonistic behaviour was quantified, and at the end of the experimental series, concentrations of serotonin (5-HT), 5-hydroxyindoleacetic acid (5-HIAA) and tryptophan (TRP, the amino acid precursor of 5-HT) were measured, and 5-HIAA/5-HT ratios (an index of 5-HT(More)
For more than a decade, damselfishes have been the prime subjects of behavioral studies conducted on the reefs off southern Florida and the Bahamas (Brockmann 1973, Burke & Bright 1972, Clarke 1977, Emery 1968, 1973, Gronell 1980, Ha 1973, Myrberg 1972a, b, c, 1980, in press a, b, Myrberg & Spires 1972, in press, Myrberg & Thresher 1974, Myrberg et al.(More)
During the parental period, females of the cichlid fish Cichlasoma nigrofasciatum have demonstrated a keen ability to locate and preferentially discriminate their own wiggling young from those of other species on the basis of chemoreception. Males also apparently perceive chemical substances emitted by their young, but their response is weak in comparison(More)