Skip to main content
×
Home
    • Aa
    • Aa

Reproductive Biology of the Black Dogfish, Centroscyllium Fabricii, Collected From Waters off Western Greenland

  • Kazunari Yano (a1)
Abstract

The reproductive biology of 1124 male (165–760 mm TL) and 1476 female (175–898 mm TL) black dogfish, Centroscyllium fabricii, was examined. The sharks were caught off western Greenland with bottom otter trawls. Size at maturity was about 550 mm TL in males and 650 mm TL in females. Ovarian ova did not continue to develop during gestation. The sex ratio of embryos was 1:1. Litter size ranged from 4 to 40, with a mean of 16–4. The total number of mature ova, fertilized ova, or embryos tended to increase with size of the females. Development of black dogfish embryos is dependent solely on yolk reserves. Near-term embryos (152–192 mm TL) had completely absorbed their external yolk sacs. The smallest free-living specimens collected in this study were 165 mm TL for males and 175 mm TL for females. The black dogfish does not seem to have a well-defined breeding season. This species displayed a well-defined pattern of depth segregation by size. The sex ratios in five shallow depth strata (500–599, 600–699, 700–799,800–899, and 900–999 m) were 1:1, but those of three deeper depth strata (1000–1099,1100–1199, and 1200–1299 m) contained a significantly greater number of females than males. Four abnormal hermaphrodites possessed gonads containing both testicular and ovarian tis-sues. Two specimens had normal female reproductive organs (e.g. ovaries, oviducts, nidamental glands, and uteri) as well as claspers.

Copyright
Linked references
Hide All

This list contains references from the content that can be linked to their source. For a full set of references and notes please see the PDF or HTML where available.

C. Capapé , J.P. Quignard & J. Mellinger , 1990. Reproduction and development of two angel sharks, Squatina squatina and S. oculata (Pisces: Squatinidae), off Tunisian coasts: semi-delayed vitellogenesis, lack of egg capsules, and lecithotrophy. Journal of Fish Biology, 37, 347356.

C. Chen , T. Taniuchi & Y. Nose , 1981. Some aspects of reproduction in the pointed-snout dogfish Squalus japonicus taken off Nagasaki and Choshi. Bulletin of the Japanese Society of Scientific Fisheries, 47, 1157–1104.

L.J. V. Compagno , D. A. Ebert & P.D. Cowley , 1991. Distribution of offshore demersal cartilaginous fish (class Chondrichthyes) off the west coast of southern Africa, with notes on their systematics. South African Journal of Marine Science. Cape Town, 11, 43139.

F.L. Hisaw & A. Albert , 1947. Observations on the reproduction of the spiny dogfish, Squalus acanthias. Biological Bulletin. Marine Biological Laboratory, Woods Hole, 92, 187199.

W.C. Hamlett & J.P. Wourms , 1984. Ultrastructure of the preimplantation yolk sac of placental sharks. Tissue and Cell, 16, 613625.

T. Iwai , 1957. The sequence of yolk absorption in the embryo of the deep-sea luminous shark, Etmopterus lucifer Jordan et Snyder. Bulletin of the ]apanese Society of Scientific Fisheries, 23, 295301.

A.D. King , 1966. Hermaphroditism in the common dogfish (Scyliorhinus caniculus). Journal of Zoology, 148, 312314.

L.E. Te Winkel , 1943. Observations on later phases of embryonic nutrition in Squalus acanthias. Journal of Morphology, 73, 177205.

J.P. Wourms , B.D. Grove & J Lombardi ., 1988. The maternal-embryonic relationship in viviparous fishes. In Fish physiology, vol. 11 (ed. Hoar W.S. and Randall D.J. ), pp. 1134. Academic Press.

K. Yamamoto & O. Kibesaki , 1950. Studies on the spiny dogfish Squalus suckleyi (1). On the development and maturity of the genital glands with growth. Bulletin of the Japanese Society of Scientific Fisheries, 15, 531538.

K. Yano , 1993. Reproductive biology of the slender smoothhound, Gollum attenuatus, collected from New Zealand waters. Environmental Biology of Fishes, 38, 5971.

K. Yano & S. Tanaka , 1988. Size at maturity, reproductive cycle, fecundity, and depth segregation of the deep sea squaloid sharks, Centroscymnus owstoni and C. coelolepis in Suruga Bay, Japan. Nippon Suisan Gakkaishi, 54, 167174.

Recommend this journal

Email your librarian or administrator to recommend adding this journal to your organisation's collection.

Journal of the Marine Biological Association of the United Kingdom
  • ISSN: 0025-3154
  • EISSN: 1469-7769
  • URL: /core/journals/journal-of-the-marine-biological-association-of-the-united-kingdom
Please enter your name
Please enter a valid email address
Who would you like to send this to? *
×