Spawning and maternal-care behaviours of a copulating sculpin, Radulinopsis taranetzi

The fertilization mode, and spawning and egg-care behaviours of the sculpin Radulinopsis taranetzi were investigated in the laboratory. Embryonic development began only after the eggs came into contact with sea water. Females spawned c. 1000 eggs and covered them with sand using their pectoral and caudal fins. Unlike other cottids, the females guarded the egg masses after spawning. During the parental period, the supramaxillary lamina and mandibular lamina of females extended to form a disc-like structure, which was used to ‘suck’ water from near the surface of the egg mass. The frequency and duration of this ‘sucking’ behaviour increased gradually until hatching, which occurred after 23—26 days at 8 � C. The oxygen consumption of the embryos was positively related to the ‘sucking’ activity. All females in this study spawned only once during the spawning season, in contrast with the paternal-care copulating cottids, which are multiple spawners. # 2005 The Fisheries Society of the British Isles

[1]  Y. Hayakawa,et al.  Non-copulatory spawning and female participation during early egg care in a marine sculpinHemilepidotus gilberti , 1996, Ichthyological Research.

[2]  D. Takahashi.  Conventional sex roles in an amphidromousrhinogobius goby in which females exhibit nuptial coloration , 2007, Ichthyological Research.

[3]  S. Malavasi,et al.  Elongation of Fin Rays in Parental Males of Zosterisessor ophiocephalus (Pisces, Gobiidae) , 2000, Environmental Biology of Fishes.

[4]  Y. Hayakawa,et al.  Fertilization environment of the non-copulating marine sculpin, Hemilepidotus gilberti , 1998, Environmental Biology of Fishes.

[5]  Ramona O. Swenson.  Sex-role reversal in the tidewater goby, Eucyclogobius newberryi , 1997, Environmental Biology of Fishes.

[6]  G. Rosenqvist,et al.  Selective males and ardent females in pipefishes , 1993, Behavioral Ecology and Sociobiology.

[7]  H. Munehara.  Utilization of polychaete tubes as spawning substrate by the sea raven Hemitripterus villosus (Scorpaeniformes) , 1992, Environmental Biology of Fishes.

[8]  I. Svensson,et al.  Mate choice, fecundity and sexual dimorphism in two pipefish species (Syngnathidae) , 1986, Behavioral Ecology and Sociobiology.

[9]  J. L. Gould,et al.  Tail size and female choice in the guppy (Poecilia reticulata) , 1985, Behavioral Ecology and Sociobiology.

[10]  J. Endler.  Natural and sexual selection on color patterns in poeciliid fishes , 1983, Environmental Biology of Fishes.

[11]  E. Balon.  Additions and amendments to the classification of reproductive styles in fishes , 1981, Environmental Biology of Fishes.

[12]  J. Baylis.  The evolution of parental care in fishes, with reference to Darwin's rule of male sexual selection , 1981, Environmental Biology of Fishes.

[13]  C. Muhlfeld.  Spawning Characteristics of Redband Trout in a Headwater Stream in Montana , 2002 .

[14]  C. Murray,et al.  Physicochemical Characteristics of the Hyporheic Zone Affect Redd Site Selection by Chum Salmon and Fall Chinook Salmon in the Columbia River , 2002 .

[15]  J. Choe,et al.  Females prefer males with larger first dorsal fins in the common freshwater goby , 2002 .

[16]  Y. Hayakawa,et al.  Initiation of sperm motility depending on a change in external osmotic pressure in the noncopulatory marine cottid fish Gymnocanthus herzensteini , 2002, Ichthyological Research.

[17]  C. Mazzoldi,et al.  Alternative male mating tactics in Gobius niger , 2002 .

[18]  R. Curry,et al.  The thermal regimes of brook trout incubation habitats and evidence of changes during forestry operations , 2002 .

[19]  H. Munehara,et al.  Sperm storage and motility in the ovary of the marine sculpin Alcichthys alcicornis (Teleostei: Scorpaeniformes), with internal gametic association. , 2002, The Journal of experimental zoology.

[20]  E. Forsgren,et al.  Male mate choice selects for female coloration in a fish , 2001, Proceedings of the National Academy of Sciences of the United States of America.

[21]  M. Yabe,et al.  Systematics of sculpins of the genus Radulinopsis (Scorpaeniformes: Cottidae), with the description of a new species from northern Japan and the Russian Far East , 2001, Ichthyological Research.

[22]  D. Geist.  Hyporheic discharge of river water into fall chinook salmon (Oncorhynchus tshawytscha) spawning areas in the Hanford Reach, Columbia River , 2000 .

[23]  T. Takegaki,et al.  Responses of the egg-tending gobiid fish Valenciennea longipinnis to the fluctuation of dissolved oxygen in the burrow , 1999 .

[24]  G. Power,et al.  Groundwater and fish—insights from northern North America , 1999 .

[25]  H. Keckeis,et al.  Effects of reduced oxygen level on the mortality and hatching rate of Chondrostoma nasus embryos , 1996 .

[26]  H. Munehara.  Sperm transfer during copulation in the marine sculpin Hemitripterus villosus (Pisces : Scorpaeniformes) by means of a retractable genital duct and ovarian secretion in females , 1996 .

[27]  I. Ahnesjö.  Apparent resource competition among embryos in the brood pouch of a male pipefish , 1996, Behavioral Ecology and Sociobiology.

[28]  T. Quinn,et al.  The effects of body size and sexual dimorphism on the reproductive behaviour of sockeye salmon, Oncorhynchus nerka , 1994, Animal Behaviour.

[29]  H. Munehara,et al.  Reproductive Cycle and Spawning Ecology in Elkhorn Sculpin, Alcichthys alcicornis , 1994 .

[30]  K. Lindström,et al.  Expected future reproductive success and paternal behaviour in the sand goby, Pomatoschistus minutus (Pisces, Gobiidae) , 1994 .

[31]  H. Munehara.  Utilization and ecological benefits of a sponge as a spawning bed by the little dragon sculpinBlepsias cirrhosus , 1991 .

[32]  H. Munehara,et al.  Internal Gametic Association and External Fertilization in the Elkhorn Sculpin, Alcichthys alcicornis , 1989 .

[33]  H. Munehara.  Spawning and Subsequent Copulating Behavior of the Elkhorn Sculpin Alcichthys alcicornis in an Aquarium , 1988 .

[34]  A. Houde.  The effects of female choice and male-male competition on the mating success of male guppies , 1988, Animal Behaviour.

[35]  D. W. Chapman,et al.  Critical Review of Variables Used to Define Effects of Fines in Redds of Large Salmonids , 1988 .

[36]  Eric A. Fischer,et al.  Internal fertilization and male parental care in the scalyhead sculpin, Artedius harringtoni , 1987 .

[37]  M. Gross,et al.  The evolution of male and female parental care in fishes , 1985 .

[38]  P. Torricelli,et al.  A quantitative analysis of the fanning activity in the male Padogobius martensi (Pisces: Gobiidae) , 1985 .

[39]  F. Whoriskey,et al.  Diel patterns of fanning activity, egg respiration, and the nocturnal behavior of male three-spined sticklebacks, Gasterosteus aculeatus L. (f. trachurus) , 1984 .

[40]  P. H. Pressley.  PARENTAL EFFORT AND THE EVOLUTION OF NEST‐GUARDING TACTICS IN THE THREESPINE STICKLEBACK, GASTEROSTEUS ACULEATUS L. , 1981, Evolution; international journal of organic evolution.

[41]  R. Wootton.  The biology of the sticklebacks , 1978 .

[42]  L. Mawdesley-Thomas.  THE FISHERIES SOCIETY OF THE BRITISH ISLES , 1970 .

[43]  F. A. Davidson.  The development of the secondary sexual characters in the pink salmon (Oncorhynchus gorbuscha) , 1935 .