Synopsis
Underwater observations were conducted on the mating habits of rockfish,Sebastes inermis, southwest of Kyushu Island, Japan, in 1984–1986. The reproductive season of the fish lasted from October to January, when most males over 1 year of age established territories ranging from 12 to 70 m2. Home ranges of females overlapped with male territories. Males performed courtship behaviors when females approached the territories. Principal motor patterns of courtship were characterized by ‘lateral display’ and ‘rushing and turning’ movements. The mating pair formed about 30 min before copulation. As the mating pair ascended to 1.5–2.0 m above the bottom, the male suddenly coiled around the female's body to copulate. In spite of frequent courtship behavior [14.8 (±10.7 SD)×15 min−1, December 1985] of males, only seven copulations were observed, occurring mostly at dusk in December. In December and January, more than half of the males had accumulated urine, some large volume of it. It was assumed that the male attracted the female by releasing substances via urine during the ‘lateral display’ movements, which were performed just in front of the female, near the snout. Other functional aspects of courtship behavior are discussed.
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References cited
Clark, E. 1965. Mating of groupers. Nature. His. 74: 22–25.
Clark, E. 1980. Distribution, mobility and behavior of the Red Sea garden eel. Nat. Geogr. Soc. Res. Rep. 13: 177–186.
Clark, E., J.S. Rabin & S. Holderman. 1988. Reproductive behavior and social organization in the sand tilefishMalacanthus plumieri. Env. Biol. Fish. 22: 273–286.
Eldridge, M.B., J.A. Whipple, M.J. Bowers, B.M. Jarvis & J. Gold. 1991. Reproductive performance of yellowtail rockfish.Sebastes flavidus. Env. Biol. Fish. 30: 91–102.
Helvey, M. 1982. First observations of courtship behavior in rockfish, genusSebastes. Copeia 1982: 763–770.
Hirayama, A. 1978. Life of 0 year black rockfish,Sebastes inermis Cuvier et Valenciennes, in the algal bed. Nankiseibutu 20: 55–62. (In Japanese).
Larson, R.J. 1980a. Competition, habitat selection, and the bathymetric segregation of two rockfish (Sebastes) species. Ecol. Monogr. 50: 221–239.
Larson, R.J. 1980b. Influence of territoriality on adult density in two rockfishes of the genusSebastes. Mar. Biol. 58: 123–132.
Larson, R.J. 1980c. Territorial behavior of the black and yellow rockfish and gopher rockfish (Scorpaenidae,Sebastes). Mar. Biol. 58: 111–122.
Liley, N.R. 1966. Ethological isolating mechanisms in four sympatric species of poecillid fishes. Behaviour Suppl. 13: 1–197.
Masuda, H., K. Amaoka, C. Araga, T. Ueno & T. Yoshino (ed.). 1984. The fishes of the Japanese Archipelago. Tokai University Press, Tokyo. 437 pp.
Mio, S. 1960. Biology ofSebastes inermis Cuvier et Valenciennes. Rec. Oceanogr. Wks. Jap. 5: 87–97.
Mizue, K. 1959a. About the seasonal cycle of mature testis ofSebastes inermis. Bull. Fac. Fish. Nagasaki Univ. 8: 111–122. (In Japanese).
Mizue, K. 1959b. Studies on a scorpaenous fishSebastiscus marmoratus Cuvier et Valenciennes, IV. On the copulatory organ of the marine ovoviviparous teleost. Bull. Fac. Fish. Nagasaki Univ. 8: 80–83. (In Japanese).
Mizue, K. 1959c. Studies on a scorpaenous fishSebastiscus marmoratus Cuvier et Valenciennes, V. On the maturation and the seasonal cycle of the ovaries of the marine ovoviviparous teleost. Bull. Fac. Fish. Nagasaki Univ. 8: 84–110. (In Japanese).
Thresher, R.E. 1984. Reproduction in reef fishes. T.F.H. Publications, Neptune City. 399 pp.
Thresher, R.E. & A.M. Gronell. 1978. Subcutaneous tagging of small reef fishes. Copeia 1978: 352–353.
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Shinomiya, A., Ezaki, O. Mating habits of the rockfishSebastes inermis . Environ Biol Fish 30, 15–22 (1991). https://doi.org/10.1007/BF02296872
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DOI: https://doi.org/10.1007/BF02296872