Fisheries prospects for the future--freshwater and marine.
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Animals↗
Biomedical subjects
J E Bardach
Publications and source records attributed to J E Bardach.
Orientation by bulk messenger sensors in aquatic vertebrates.
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Animals↗
Chemical communication in social behavior of a fish, the yellow bullhead (Ictalurus natalis).
Studies of behavior in yellow bullheads showed that they recognized individuals of their own species by means of pheromones. After training by reward and punishment, blinded bullheads were able to discriminate between the odors of two donor fish, but they lost this ability when deprived of their sense of smell. The main source of the intraspecific chemical stimuli involved in recognition is the mucus. A change in status after fighting was chemically communicated to other bullheads.
Animal Communication↗
Orientation by taste in fish of the genus Ictalurus.
Fish of the genus Ictalurus can find distant chemical clues by means of taste alone, and they exhibit true gradient searching in the absence of a current. Neither unilateral nor bilateral deprivation of the sense of smell impaired their searching ability, but unilateral deprivation of taste receptors which are spread over body and barbels of the animals caused pro nounced circling toward the intact side. The relation of swimming paths of the fish to the chemical in the water suggested that comparisons of concentrations were made in time and space.
Animals↗