Abstract
The age of the Ajime-loach,Niwaella delicata (a species endemic to Japan), was determined from the number of concentric rings appearing on the cross-sectional surface of the erectile spine (peculiar to Cobitidae). The ages of loaches caught in the Yura River, Kyoto, were determined and growth rates for each sex estimated. It was found that size dimorphism in this species was due to different growth patterns between the sexes, 2.5 years old males being larger than females and usually sexually mature, unlike the latter. Females older than 3.5 years were sexually mature and larger than males of equivalent age.
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Literature Cited
Akaike, H. 1973. Information theory and an extension of the maximum likelihood principal. Pages 267–281in B. N. Petrov and F. Csaki, eds. 2nd Inter. Symp. On Information Theory. Akademiai Kiado, Budapest.
Akamine, T. 1995. A mathematical study of fish growth formula in population dynamics. Bull. Natl. Res. Inst. Fish. Sci., (7): 189–263. (In Japanese with English summary.)
Beamish, R. J. and G. A. McFarlane. 1987. Current trends in age determination methodology. Pages 15–42in R. C. Summerfelt and G. E. Hall, eds. Age and Growth of Fish. Iowa State Univ. Press, Ames.
Carlander, K. D. 1987. A history of scale age and growth studies of North American freshwater fish. Pages 3–14in R. C. Summerfelt and G. E. Hall, eds. Age and Growth of Fish. Iowa State Univ. Press, Ames.
Cooper, R. A. 1967. Age and growth of the tautog,Tautoga omitis (L.), from Rhode Island. Trans. Amer. Fish Soc., 96: 134–142.
Holden, M. J. and P. S. Meadows. 1962. The structure of the spine of the spurdogfish (Squalus acanthias L.) and its use for age determination. J. Mar. Biol. Ass. U. K., 42: 179–197.
Hora, S. L. 1927. Note on an hermaphrodite loach. J. Asiatic Soc. Bengal. 22: 77–80.
Kobayashi, H. 1955. On an hermaphrodite loach,Lefua nikkonis (Jordan et Fowler). Annot. Zool. Japon., 28: 17–18. (In Japanese with English summary.)
Kobayashi, H. 1964. On an hermaphroditic mud loach,Misgurnus anguillicaudatus (Cantor). J. Hokkaido Gakugei Univ. (Sect. II, B), 14: 23–25. (In Japanese with English summary.)
Lodi, E. 1967. Sex reversal ofCobitis taenia L. (Osteichthyes, Fam. Cobitidae). Experientia, 23: 446–447.
Lodi, E. 1980. Hermaphroditic and gonochoric populations ofCobitis taenia bilineata Canestrini (Cobitidae, Osteichthyes). Monitore Zool. Ital. N. S., 14: 235–243.
Marconato, A. and M. B. Rasotto. 1989. The biology of spined loach,Cobitis taenia L. Boll. Zool., 56: 73–80.
Menon, M. D. 1950. Bionomics of the poor-cod (Gadus minutus L.) in the Plymouth area. J. Mar. Biol. Ass. U. K. N. S., 29: 185–238.
Mills, C. A., J. S. Welton and E. L. Rendle. 1983. The age, growth and reproduction of the stone loachNoemacheilus barbatulus (L.) in a Dorset chalk stream. Freshw. Biol., 13: 283–292.
Niwa, H. 1976. Ajime. Taishu-shobo, Gifu, Japan. xxii +226pp. (In Japanese.)
Pantulu, V. R. 1962. On the use of pectoral spines for the determination of age and growth ofPangasius pangasius (Hamilton-Buchanan). J. Cons. Perm. Int. Explor. Mer., 27: 192–216.
Rasotto, M. B. 1992. Gonadal differentiation and mode of sexuality inCobitis taenia (Teleostei; Cobitidae). Copeia, 1992: 223–228.
Robotham, P. W. J. 1981. Age, growth and reproduction of a population of spined loach,Cobitis taenia (L.) Hydrobiol., 85: 129–136.
Skryabin, A. G. 1993. The biology of stone loachBarbatula barbatulus in the Rivers Goloustnaya and Olkha, East Siberia. J. Fish Biol., 42: 361–374.
Slaviki, O. and P. Rab. 1995. Effect of microhabitat on the age and growth of two stream-dwelling populations of spined loach,Cobitis taenia. Flolia Zoologica, 44: 167–174.
Suzuki, R. 1955. Note on hermaphroditism of spinous loach (Cobitis biwae) and crossing between this fish and the mud loach (Misgurnus anguillicaudatus). Zool. Mag., 64: 229–231.
Taguchi, J. and K. Saito. 1982. Studies on the reproduction of Delicate Loach,Niwaella delicata-VII On the mass production of seeds. Gisuishikenpou, (27): 41–47. (In Japanese with English summary.)
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Kano, Y. Age and growth of the ajime-loach,niwaella delicata, in the yura river, kyoto, japan. Ichthyological Research 47, 183–186 (2000). https://doi.org/10.1007/BF02684239
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DOI: https://doi.org/10.1007/BF02684239