Aspect of the reproductive biology of the Gummy Shark, Mustelus antarcticus Gunther, from waters off the South coast of Western Australia
The gummy shark (Mustelus antarcticus) is a major target species in two substantial shark fisheries that operate in temperate Australian waters. Data on the reproductive biology of M. antarcticus in the waters off south-western Australia were obtained from samples collected by commercial vessels ope...
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CSIRO Publishing
1990
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Online Access: | https://doi.org/10.1071/MF9900807 https://researchportal.murdoch.edu.au/esploro/outputs/journalArticle/Aspect-of-the-reproductive-biology-of/991005546362207891 |
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ftmurdochunivall:oai:alma.61MUN_INST:11137288430007891 2024-09-15T17:46:58+00:00 Aspect of the reproductive biology of the Gummy Shark, Mustelus antarcticus Gunther, from waters off the South coast of Western Australia Lenanton, R.C.J. Heald, D.I. Platell, M. Cliff, M. Shaw, J. 1990 https://doi.org/10.1071/MF9900807 https://researchportal.murdoch.edu.au/esploro/outputs/journalArticle/Aspect-of-the-reproductive-biology-of/991005546362207891 eng eng CSIRO Publishing ispartof: Marine and Freshwater Research spage 807 epage 822 issue 6 vol 41 doi:10.1071/MF9900807 1323-1650 http://dx.doi.org/10.1071/MF9900807 991005546362207891 https://researchportal.murdoch.edu.au/esploro/outputs/journalArticle/Aspect-of-the-reproductive-biology-of/991005546362207891 alma:61MUN_INST/bibs/991005546362207891 © 1990 CSIRO text Article 1990 ftmurdochunivall https://doi.org/10.1071/MF9900807 2024-08-15T00:52:48Z The gummy shark (Mustelus antarcticus) is a major target species in two substantial shark fisheries that operate in temperate Australian waters. Data on the reproductive biology of M. antarcticus in the waters off south-western Australia were obtained from samples collected by commercial vessels operating from Albany to Espérance, Western Australia. The samples contained a ratio of four females to one male. M. antarcticus is a viviparous, aplacental species. Males mature at a smaller size than females. Since the overwhelming majority of sharks sampled were mature, it was not possible to estimate precisely the mean size at which sexual maturity was attained. Examination of seasonal changes in the development of ova and testes, in uterine contents, and in embryo growth established that the period of parturition, mating and ovulation occurred over the 3 months between early November and early February. The gestation period was 11-12 months. Full-term embryos ranged in size from 30 to 36 cm total length and occurred in a sex ratio of one male to one female. The ovarian and gestational cycles proceed concurrently, with reproduction occurring annually. Only one of the 224 females analysed for uterine content was considered to be in a true post-partum condition. The number of embryos (N) per mother increased with the length of the mother (L) according to the regression N= exp(-4’ 13398 + 0-049171L). The reproductive biology of females collected off Albany and Espérance differed in some respects from that of females collected off south-eastern Australia. Article in Journal/Newspaper Antarc* antarcticus Murdoch University Research Portal Marine and Freshwater Research 41 6 807 |
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English |
description |
The gummy shark (Mustelus antarcticus) is a major target species in two substantial shark fisheries that operate in temperate Australian waters. Data on the reproductive biology of M. antarcticus in the waters off south-western Australia were obtained from samples collected by commercial vessels operating from Albany to Espérance, Western Australia. The samples contained a ratio of four females to one male. M. antarcticus is a viviparous, aplacental species. Males mature at a smaller size than females. Since the overwhelming majority of sharks sampled were mature, it was not possible to estimate precisely the mean size at which sexual maturity was attained. Examination of seasonal changes in the development of ova and testes, in uterine contents, and in embryo growth established that the period of parturition, mating and ovulation occurred over the 3 months between early November and early February. The gestation period was 11-12 months. Full-term embryos ranged in size from 30 to 36 cm total length and occurred in a sex ratio of one male to one female. The ovarian and gestational cycles proceed concurrently, with reproduction occurring annually. Only one of the 224 females analysed for uterine content was considered to be in a true post-partum condition. The number of embryos (N) per mother increased with the length of the mother (L) according to the regression N= exp(-4’ 13398 + 0-049171L). The reproductive biology of females collected off Albany and Espérance differed in some respects from that of females collected off south-eastern Australia. |
format |
Article in Journal/Newspaper |
author |
Lenanton, R.C.J. Heald, D.I. Platell, M. Cliff, M. Shaw, J. |
spellingShingle |
Lenanton, R.C.J. Heald, D.I. Platell, M. Cliff, M. Shaw, J. Aspect of the reproductive biology of the Gummy Shark, Mustelus antarcticus Gunther, from waters off the South coast of Western Australia |
author_facet |
Lenanton, R.C.J. Heald, D.I. Platell, M. Cliff, M. Shaw, J. |
author_sort |
Lenanton, R.C.J. |
title |
Aspect of the reproductive biology of the Gummy Shark, Mustelus antarcticus Gunther, from waters off the South coast of Western Australia |
title_short |
Aspect of the reproductive biology of the Gummy Shark, Mustelus antarcticus Gunther, from waters off the South coast of Western Australia |
title_full |
Aspect of the reproductive biology of the Gummy Shark, Mustelus antarcticus Gunther, from waters off the South coast of Western Australia |
title_fullStr |
Aspect of the reproductive biology of the Gummy Shark, Mustelus antarcticus Gunther, from waters off the South coast of Western Australia |
title_full_unstemmed |
Aspect of the reproductive biology of the Gummy Shark, Mustelus antarcticus Gunther, from waters off the South coast of Western Australia |
title_sort |
aspect of the reproductive biology of the gummy shark, mustelus antarcticus gunther, from waters off the south coast of western australia |
publisher |
CSIRO Publishing |
publishDate |
1990 |
url |
https://doi.org/10.1071/MF9900807 https://researchportal.murdoch.edu.au/esploro/outputs/journalArticle/Aspect-of-the-reproductive-biology-of/991005546362207891 |
genre |
Antarc* antarcticus |
genre_facet |
Antarc* antarcticus |
op_relation |
ispartof: Marine and Freshwater Research spage 807 epage 822 issue 6 vol 41 doi:10.1071/MF9900807 1323-1650 http://dx.doi.org/10.1071/MF9900807 991005546362207891 https://researchportal.murdoch.edu.au/esploro/outputs/journalArticle/Aspect-of-the-reproductive-biology-of/991005546362207891 alma:61MUN_INST/bibs/991005546362207891 |
op_rights |
© 1990 CSIRO |
op_doi |
https://doi.org/10.1071/MF9900807 |
container_title |
Marine and Freshwater Research |
container_volume |
41 |
container_issue |
6 |
container_start_page |
807 |
_version_ |
1810495420049129472 |