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RESEARCH ARTICLE
Contents Vol 56(4)

Distribution, population structure and biological aspects of Squalus spp. (Chondrichthyes : Squaliformes) from New South Wales and adjacent Australian waters

Ken J. Graham
+ Author Affiliations
- Author Affiliations

NSW Department of Primary Industries, Cronulla Fisheries Research Centre, PO Box 21, Cronulla, NSW 2230, Australia. Email: grahamk@fisheries.nsw.gov.au

Marine and Freshwater Research 56(4) 405-416 https://doi.org/10.1071/MF04275
Submitted: 19 November 2004  Accepted: 31 March 2005   Published: 27 June 2005

Abstract

Four species of Squalus dogsharks, S. megalops, S. cf. mitsukurii, Squalus sp. B and Squalus sp. F inhabit shelf and upper-slope depths off New South Wales and adjacent Australian states. During fishery surveys between 1976 and 2001, distributional, size composition and reproductive data were collected for these species. Adult size classes dominated catches and, for S. megalops, heavily biased sex ratios were observed. Although no female data were available for the rarely caught Squalus sp. B, reproduction in the other three species was found to be continuous with no evidence of seasonality. Fecundity was 1–3 embryos for S. megalops, 1–5 for Squalus sp. F and 4–10 for S. cf. mitsukurii. All species are commercially exploited, contributing to the mixed species demersal trawl fishery off New South Wales. Stocks of some species are greatly depleted on the main trawling grounds, but the overall distributions of all species include large areas of lightly exploited habitat.

Extra keywords: dogfish, fishery management, length–frequency, reproduction, Squalidae.


Acknowledgments

All associated with FRV Kapala are thanked for their cooperation and assistance over many years. John Stevens and Ross Daley are also thanked for their contributions to this and associated studies. Michael Lowry and Dennis Reid gave helpful advice with data analyses. Sarah Irvine, Kevin Rowling, Steve Kennelly and two anonymous referees made many constructive suggestions to improve the manuscript. Data from Bermagui and Portland were recorded during the FRDC funded project 98/204.


References

Andrew N. L., Graham K. J., Hodgson K. E., and Gordon G. N. G. (1997). Changes after twenty years in relative abundance and size composition of commercial fishes caught during fishery independent surveys on SEF trawl grounds. FRDC Project No. 96/139. NSW Fisheries Final Report Series No. 1, Sydney.

Bass A. J., D’Aubrey J. D., and Kistnasamy N. (1976). Sharks of the east coast of southern Africa. VI. The families Oxynotidae, Squalidae, Dalatiidae and Echinorhinidae. South African Association for Marine Biological Research, Oceanographic Research Institute Investigational Report No. 45.

Clark M. R., and King K. J. (1989). Deepwater fish resources off the North Island, New Zealand: results of a trawl survey, May 1985 to June 1986. New Zealand Fisheries Technical Report No. 11.

Clarke, M. W. , Connolly, P. L. , and Bracken, J. J. (2002). Catch, discarding, age estimation, growth and maturity of the squalid shark Deania calceus west and north of Ireland. Fisheries Research 56, 139–153.
| Crossref | GoogleScholarGoogle Scholar | Compagno L. J. V. (1990). Shark exploitation and conservation. In ‘Elasmobranchs as Living Resources: Advances in the Biology, Ecology, Systematics, and Status of the Fisheries’. (Eds H. L. Pratt Jr, S. H. Gruber and T. Taniuchi.) pp. 391–414. NOAA Technical Report, NMFS No. 90.

Compagno, L. J. V. , Ebert, D. A. , and Cowley, P. D. (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 11, 43–139.
Daley R., Stevens J. D., and Graham K. J. (2002). Catch analysis and productivity of the deepwater dogfish resource in southern Australia. FRDC Project 1998/108 Final Report. CSIRO Marine Research, Fisheries Research and Development Corporation and NSW Fisheries, Australia.

Gell, F. R. , and Roberts, C. M. (2003). Benefits beyond boundaries: the fishery effects of marine reserves. Trends in Ecology & Evolution 18, 448–455.
| Crossref | GoogleScholarGoogle Scholar | Graham K. J., Liggins G. W., and Wildforster J. (1996). New South Wales shelf trawl survey results for Year 2:1994. Kapala Cruise Report No. 115. NSW Fisheries Research Institute, Sydney.

Graham K. J., Wood B. R., and Andrew N. L. (1997). The 1996–97 survey of upper slope trawling ground between Sydney and Gabo Island (and comparisons with the 1976–77 survey). Kapala Cruise Report No. 117. NSW Fisheries Research Institute, Sydney.

Graham, K. J. , Andrew, N. J. , and Hodgson, K. E. (2001). Changes in relative abundance of sharks and rays on Australian South East Fishery trawl grounds after twenty years of fishing. Marine and Freshwater Research 52, 549–561.
| Crossref | GoogleScholarGoogle Scholar | Hoenig J. M., and Gruber S. H. (1990). Life-history patterns in elasmobranchs: implications for fisheries management. In ‘Elasmobranchs as Living Resources: Advances in the Biology, Ecology, Systematics, and Status of the Fisheries’. (Eds H. L. Pratt Jr, S. H. Gruber and T. Taniuchi.) pp. 1–16. NOAA Technical Report, NMFS No. 90.

Irvine, S. B. , Graham, K. J. , Daley, R. K. , and Stevens, J. D. (In press). Size composition, reproductive biology and diet of deepwater dogfishes (Chondrichthyes, Squaliformes) from southeastern Australia. Environmental Biology of Fishes. ,
Last P. R., and Stevens J. D. (1994). ‘Sharks and Rays of Australia.’ (CSIRO Publishing: Melbourne.)

Litvinov, F. F. (1990). Ecological characteristics of the dogfish, Squalus mitsukurii, from the Sala-Y-Gomez Seamounts. Journal of Ichthyology 30, 104–115.
Merrett N. R., and Haedrich R. L. (1997). ‘Deep-sea Demersal Fish and Fisheries.’ (Chapman and Hall: London.)

Nammack, M. F. , Musick, J. A. , and Colvocoresses, J. A. (1985). Life history of spiny dogfish off the northeastern United States. Transactions of the American Fisheries Society 114, 367–376.
| Crossref | GoogleScholarGoogle Scholar | Tilzey R. D. J. (1994). Introduction. In ‘The South East Fishery’. (Ed. R. D. J. Tilzey.) pp. 15–40. (Bureau of Resources Sciences: Canberra.)

Walker, T. I. (1998). Can shark resources be harvested sustainably? A question revisited with a review of shark fisheries. Marine and Freshwater Research 49, 553–572.
| Crossref | GoogleScholarGoogle Scholar |

Watson, G. , and Smale, M. J. (1998). Reproductive biology of the shortnose spiny dogfish, Squalus megalops, from the Agulhas Bank, South Africa. Marine and Freshwater Research 49, 695–703.
| Crossref | GoogleScholarGoogle Scholar |

Watson, G. , and Smale, M. J. (1999). Age and growth of the shortnose spiny dogfish, Squalus megalops, from the Agulhas Bank, South Africa. South African Journal of Marine Science 21, 9–18.


Wilson, C. D. , and Seki, M. P. (1994). Biology and population characteristics of Squalus mitsukurii from a seamount in the central North Pacific Ocean. Fishery Bulletin 92, 851–864.