Environmental Biology of Fishes

, Volume 34, Issue 1, pp 95–101 | Cite as

Sexual dimorphism and food habits of the clingfish, Diademichthys lineatus, and its dependence on host sea urchin

  • Hiroko Sakashita


Stomach contents of the clingfish Diademichthys lineatus, 10–56 mm standard length, revealed changes in food habits with growth and sexual differences. Soon after settlement, D. lineatus obtained food from their host sea urchin (genus Diadema) and other associated symbionts. They became less dependent on the host with growth. The juveniles ate pedicellariae and sphaeridia of the host and commensal copepods, whereas the adult fish ate burrowing bivalves in corals as well as tube feet of their host and eggs of a commensal shrimp. The young fish were transitional in their food habits. The change in food habits of the fish coincided with behavioral changes; i.e. enlargement of home ranges and less dependency on the host. The adult females, having a longer snout, ate shrimp eggs and bivalves more frequently than the adult males, which ate tube feet of the host more often than the females did. Sexual difference in food habits was apparent after the sex of the fish became identifiable by comparing snout shapes. The polygynous mating system of this species suggests that conspicuous sexual dimorphism might have developed under sexual selection. However, niche partitioning of food is also likely to be related to this sexual dimorphism.

Key words

Gobiesocidae Symbiosis Nutritional dependency on the host Sexual dimorphism Niche partitioning 


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References cited

  1. Allen, G.R. & W.A. Starck II. 1973. Notes on the ecology, zoogeography, and coloration of the gobiesocid clingfishes, Lepadichthys caritus Briggs and Diademichthys lineatus (Sauvage). Proc. Lin. Soc. N. S. W. 98: 95–97.Google Scholar
  2. Briggs, J.C. 1955. A monograph of the clingfishes (order Xenopterigii). Stanford Ichthyol. Bull. 6: 1–224.Google Scholar
  3. Briggs, J.C. 1966. A new clingfish of the genus Lepadichthys from the Red Sea. Bull. Sea Fish. Res. Sta. Haifa 42: 37–40.Google Scholar
  4. Briggs, J.C. 1976. A new genus and species of clingfish from the western Pacific. Copeia 1976: 339–341.Google Scholar
  5. Castro, P. 1971. Nutritional aspects of the symbiosis between Echinoecus pentagonus and its host in Hawaii, Echinothrix calamaris. pp. 229–247. In: T.C. Cheng(ed.) Aspects of the Biology of Symbiosis, University Park Press, Baltimore.Google Scholar
  6. Dix, T.G. 1969. Association between the echinoid, Evechinus chloroticus (Val.) and the clingfish Dellichthys morelandi Briggs. Pacif. Sci. 23: 332–336.Google Scholar
  7. DeMartini, E.E. 1985. Social behavior and coloration changes in painted greenling, Oxylebius pictus (Pisces: Hexagramidae). Copeia 1985: 966–975.Google Scholar
  8. Fishelson, L. 1966. Preliminary observations on Lepadichthys lineatus Briggs, a clingfish associated with crinoids. Bull. Sea Fish. Res. Sta. Haifa 42: 41–48.Google Scholar
  9. Gould, W.R. 1965. The biology and morphology of Acyrtops beryllinus, the emerald clingfish. Bull. Mar. Sci. 15: 165–188.Google Scholar
  10. Hasting, P.A. 1988. Female choice and male reproductive success in the angel blenny, Coralliozetus angelica (Teleostei: Chaenopsidae). Anim. Behav. 36: 115–124.Google Scholar
  11. Hori, K., N. Fusetani, K. Hashimoto, K. Aida & J.E. Randall. 1979. Occurrence of a gramistine-like mucous toxin in the clingfish Diademichthys lineatus. Toxicon 17: 418–424.Google Scholar
  12. Masuda, H., K. Amaoka, C. Araga, T. Ueno & T. Yoshino. 1984. The fishes of the Japanese Archipelago (text). Tokai Univ. Press, Tokyo. 448 pp. (In Japanese).Google Scholar
  13. Oku (Sakashita), H. 1989. Reproductive biology and food habits of the clingfish, Diademichthys lineatus, associated with diadematid urchins. M.S. Thesis, University of the Ryukyus, Okinawa. 43 pp.Google Scholar
  14. Oku (Sakashita), H. 1990. Reproductive biology of the clingfish, Diademichthys lineatus (Piesces: Gobiesocidae). Research Student Thesis, University of the Ryukyus, Okinawa. 30 pp. (In Japanese).Google Scholar
  15. Okuno, R., M. Nishiguchi & T. Kurio. 1962. Underwater observations of reef fishes with reference to their micro-habitats and behaviours. II. 2. Doryrhamphus sp., 3. Diademichthys lineatus, 3. Stenopus hispidus. J. Japan. Assoc. Zool. Gardens Aquarium. 3 (1–2): 16–17. (In Japanese).Google Scholar
  16. Petersen, C.W. 1988. Male mating success, sexual size dimorphism, and site fidelity in two species of Malacoctenus (Labrisomidae). Env. Biol. Fish. 21: 173–183.Google Scholar
  17. Pfaff, J.R. 1942. On a new genus and species of the family Gobiesocidae from the Indian Ocean, with observations on sexual dimorphism in the Gobiesocidae, and on the connection of certain gobiesocids with echinoids. Vidensk. Meddr. dansk naturh. Foren. Kjob. 105: 413–422.Google Scholar
  18. Ralls, K. 1977. Sexual dimorphism in mammals: avian models and unanswered questions. Amer. Nat. 111: 917–938.Google Scholar
  19. Robertson, D.R. & S.G. Hoffman. 1977. The roles of female mate choice and predation in the mating systems of some tropical labroid fishes. Z. Tierpsychol. 45: 298–320.Google Scholar
  20. Shiogaki, M. & Y. Dotsu. 1971a. The life history of the clingfish, Aspasma minima. Japan. J. Ichthyol. 18: 76–84. (In Japanese).Google Scholar
  21. Shiogaki, M. & Y. Dotsu. 1971b. The life history of the clingfish, Conidens laticephalus. Bull. Fac. Fish. Nagasaki Univ. 32: 7–16. (In Japanese).Google Scholar
  22. Shiogaki, M. & Y. Dotsu. 1972. The spawning and larva rearing of the clingfish, Aspasmichthys ciconiae and the spawning of the clingfish, Aspasma minima. Bull. Fac. Fish. Nagasaki Univ. 34: 29–33. (In Japanese).Google Scholar
  23. Teytaud, A.R. 1971. Food habits of the goby, Ginsburgellus novemlineatus and the clingfish, Arcos rubiginosus associated with echinoids in the Virgin Islands. Carib. J. Sci. 11: 41–45.Google Scholar
  24. Thresher, R.E. 1984. Reproduction in reef fishes. T.F.H. Publications, Neptune City. 399 pp.Google Scholar
  25. Thresher, R.E. & J.T. Moyer. 1983. Male success, courtship complexity and patterns of sexual selection in three congeneric species of sexually monochromatic and dichromatic damselfishes (Pisces: Pomacentridae). Anim. Behav. 31: 113–127.Google Scholar
  26. Wells, A.W. 1979. Notes on the life history of the California clingfish, Gobiesox rhessodon (Gobiesociformes, Gobiesocidae). Calif. Fish and Game 65: 106–110.Google Scholar

Copyright information

© Kluwer Academic Publishers 1992

Authors and Affiliations

  • Hiroko Sakashita
    • 1
  1. 1.Department of Marine SciencesUniversity of the RyukyusOkinawaJapan

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