Abstract
Shark populations tend to be highly vulnerable to overexploitation due to low fecundity and slow growth rates. Recent fishing pressure on the smooth dogfish in the northwest Atlantic has created a necessity for more information about their basic biology. Length and age at maturity, fecundity, and reproductive season were estimated. Total length at 50% maturity was 102 cm for females, and 86 cm for males. The majority of females were mature at age 4 or 5, and all males were mature at 2 or 3 years of age. Females had an 11–12 month gestation with parturition occurring in May, ovulation occurring between May and July likely in late May and early June, and mating occurring between May and September. Fecundity ranged between 3 and 18 pups per litter, and was positively related to length and age, with a mean of 9.53 pups per litter. Sperm was found in the terminal zone of the oviducal gland of females throughout the year.
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References cited
Bigelow, H.B. & W.C. Schroeder. 1948. Sharks. pp. 244–254. In: Fishes ofthe western North Atlantic, Pt 1: lancelets, cyclostomes, and sharks, Sears Found. Mar. Res. Memoir 1, Yale University. New Haven.
Callard, G.V. 1991. Spermatogenesis. pp. 303–341. In: P. Pang and M. Schreibman (ed.) Vertebrate Endocrinology: Fundamentals and Biomedical Implications, Vol 4, Part A, Academic Press, San Diego.
Compagno, L.J.V. 1984. FAO species catalogue, Vol 4, Part 2: Sharksof the world. FAO, Rome. 655 pp.
Conrath, C.L. 2000. Population dynamics of the smooth dogfish, Mustelus canis, in the northwest Atlantic. M.Sc. Thesis, Virginia Institute of Marine Science, Gloucester Point. 93 pp.
Francis, M.P. 1981. Von Bertalanffy growth rates in species of Mustelus (Elasmobranchii: Triakidae). Copeia 1981: 189–192.
Francis, M.P. & J.T. Mace. 1980. Reproductive biology of Mustelus lenticulatus from Kaikoura and Nelson. New Zealand J. Mar. Freshwater Res. 14: 303–311.
Hamlett, W.C. & T.J. Koob. 1999. Female reproductive system. pp. 398–433. In: W.C. Hamlett (ed.) Sharks, Skates, and Rays: The Biology of Elasmobranch Fishes, The Johns Hopkins University Press, Baltimore.
Hamlett, W.C., M.K. Hysell, M. Jezior, T. Rozycki, N. Brunette & K. Tumilty. 1999. Fundamental zonation in elasmobranch oviducal glands. pp. 271–280. In: B. Seret and J.-Y. Sire (ed.) Proceedings of the 5th Indo-Pacific Fish Conference, Noumea, 1997, Soc. Fr. Icthyol., Paris.
Hamlett, W.C., D.P. Knight, T.B. Koob, M. Jezior, T. Luon, T. Rozycki, N. Brunette & M.K. Hysell. 1998. Survey of oviducal gland structure and function in elasmobranchs. J. Exp. Zool. 282: 399–420.
Holden, M.J. 1974. Problems in the rational exploitation of elasmobranch populations and some suggested solutions. pp. 117–137. In: F.R. Harden Jones (ed.) Sea Fisheries Research, Halstead Press, J. Wiley and Sons, New York.
Lenanton, R.C.J., D.I. Heald, M. Platell, M. Cliff & J. Shaw. 1990. Aspects of the reproductive biology of the gummy shark, Mustelus antarcticus Gunther, from waters off the south coast of Western Australia. Aust. J. Mar. Freshwater Res. 41: 807–822.
Maruska, K.P., E.G. Cowie & T.C. Tricas. 1996. Periodic gonadal activity and protracted mating in elasmobranch fishes. J. Exp. Zool. 276: 219–232.
Massey, B.R. & M.P. Francis. 1989. Commercial catch composition and reproductive biology of rig (Mustelus lenticulatus) from Pegasus Bay, Canterbury, New Zealand. New Zealand J. Mar. Freshwater Res. 23: 113–120.
Moss, S.A. 1972. Tooth replacement and body growth rates in the smooth dogfish, Mustelus canis (Mitchill). Copeia 1972: 808–811.
Pratt, H.L., Jr. 1979. Reproduction in the blue shark, Prionace glauca. U.S. Fish. Bull. 77: 445–470.
Pratt, H.L., Jr. 1993. The storage of spermatozoa in the oviducal glands of western North Atlantic sharks. Env. Biol. Fish. 38: 139–149.
Pratt, H.L., Jr. & J.G. Casey. 1990. Shark reproductive strategies as a limiting factor in directed fisheries, with a review of Holden's method of estimating growth parameters. pp. 97–109. In: H.L Pratt, Jr., S.H. Gruber & T. Taniuchi (ed.) Elasmobranchs as Living Resources: Advances in Biology, Ecology, Systematics and Status of the Fisheries, U.S. Dep. Commer., NOAA Tech. Rep. NMFS 90.
Rountree, R.A. & K.W. Able. 1996. Seasonal abundance, growth, and foraging habits of juvenile smooth dogfish, Mustelus canis, in a New Jersey estuary. U.S. Fish. Bull. 94: 522–534.
Taniuchi, T., N. Kuroda & Y. Nose. 1983. Age, growth, reproduction, and food habits of the star-spotted dogfish, Mustelus manazo collected from Chosi. Bulletin of the Japanese Society of Scientific Fisheries 49: 1325–1334.
Teshima, K. 1981. Studies on the reproduction of Japanese smooth dogfishes, Mustelus manazo and Mustelus griseus. Journal of Shimonoseki University of Fisheries 29: 113–199.
Tewinkle, L.E. 1950. Notes on the ovulation, ova, and early development in the smooth dogfish, Mustelus canis. Biol. Bull. 99: 474–486.
Yamaguchi, A., T. Taniuchi & M. Shimizu. 1997. Reproductive biology of the starspotted dogfish Mustelus manazo fromTokyo Bay, Japan. Fisheries Science 63: 918–922.
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Conrath, C.L., Musick, J.A. Reproductive Biology of the Smooth Dogfish, Mustelus canis, in the Northwest Atlantic Ocean. Environmental Biology of Fishes 64, 367–377 (2002). https://doi.org/10.1023/A:1016117415855
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DOI: https://doi.org/10.1023/A:1016117415855