Abstract
The present study on chemotaxis activity was conducted between May 1989 and March 1990. In order to establish a chemotaxis index, with special reference to a repellence index of food for black abalone Haliotis discus, a logistic curve y=g/{1+ exp [-r(j-a)]}, where g, r and a are constants, was applied to time-courses of abalone responses to fresh and spoiled algal extracts. The time-courses were respresented by the number of individuals (y i) displaying three behaviors (entering. leaving and remaining in a test compartment with algal sample) over time (j=1 to 10, 2-min intervals). Repellence and attraction specimens were prepared from a homogenate of green laver Ulva pertusa allowed to spoil for 2, 4 and 6 d at 40°C, and from fresh homogenate, respectively. Of 32 time-courses (estimated according to a method whereby the observed number was weighted by j for each behavior, involving 30 individuals), 32 “entered”, 19 “left” and 19 “remained” time-courses fitted the curve at the 0.10 level, as determined by a chi-square test. A general evaluation of repellence and attraction, determined by observable behavior, agreed well with the difference in a between the dummy (control) and specimen curves, and with the ratio of a in the dummy curve to a in the specimen curve, for logistic curves fitted to the “entred” time-course. The difference was >0 and the ratio was >1 in the repellence index, and <0 or <1 respectively in the attraction index. The validity of the indexes was ascertained using food specimens prepared from three kinds of algae.
Similar content being viewed by others
Literature cited
Harada, K. (1987). Feeding repellents, deterrents and suppressants for aquatic animals. Suisan no Kenkyu 6: 53–62
Harada, K., Fukuda, K., Sugihara, M. (1986). Statistical evaluation of chemotaxes, with special reference activity of food for oriental weatherfish. Nippon Suisan Gakk. 52: 1215–1224
Harada, K., Kawasaki, O. (1982). The attractive effect of seaweeds based on the behavioral responses of young herbivorous abalone Haliotis discus. Nippon Suisan Gakk. 48: 617–621
Kurata, K., Shiraishi, K., Takato, T., Taniguchi, K., Suzuki, M. (1988a). A new feeding-deterrent diterpenoid from the brown alga Diplophus okamurai Dawson. Chem. Lett. 1988: 1629–1632
Kurata, K., Suzuki, M., Shiraishi, K., Taniguchi, K. (1988b). Spatane-type diterpens with biological activity from the brown alga Dilophus okamurai. Phytochem. 27: 1321–1324
Kurata, K., Taniguchi, K., Shiraishi, K., Suzuki, M. (1989). Structures of secospatane-type diterpens with feeding-deterrent activity from the brown alga Dilophus okamurai. Tetrahedron Lett. 30: 1567–1570
Michelson, E. H. (1960). Chemoreception in the snail Australorbis glabratus. Am. J. Trop. Med. Hyg. 9: 480–487
Shepherd, S. A. (1975). Distribution, habitat and feeding habits of abalone. Aust. Fish. 19: 12–15
Williams, L. G., Rittschof, D., Brown, B., Carriker, M. R. (1983). Chemotaxis of oyster drills to competing prey odors. Biol. Bull. mar. biol. Lab., Woods Hole 164: 536–548
Winter, F. C. (1989). Brown algal polyphenolics deter grazing by the California red abalone. First International Symposium on Abalone Biology, Fisheries and Culture, La Paz, B.C.S., Mexico, November 21–25
Author information
Authors and Affiliations
Additional information
Communicated by M. Anraku, Suva
Rights and permissions
About this article
Cite this article
Harada, K. Studies on feeding repellents for fishes and shellfishes. Marine Biology 112, 383–388 (1992). https://doi.org/10.1007/BF00356283
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/BF00356283