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RESEARCH ARTICLE
Contents Vol 58(8)

Reproductive synchrony of three sympatric species of wobbegong shark (genus Orectolobus) in New South Wales, Australia: reproductive parameter estimates necessary for population modelling

Charlie Huveneers A D , Terence I. Walker B , Nicholas M. Otway C and Robert G. Harcourt A
+ Author Affiliations
- Author Affiliations

A Marine Mammal Research Group, Graduate School of the Environment, Macquarie University, Sydney, NSW 2109, Australia.

B Primary Industries Research Victoria, PO Box 114, Queenscliff, Vic. 3225, Australia.

C NSW Department of Primary Industries, Port Stephens Fisheries Centre, Taylors Beach Road, Taylors Beach, NSW 2316, Australia.

D Corresponding author. Email: charlie.huveneers@sims.org.au

Marine and Freshwater Research 58(8) 765-777 https://doi.org/10.1071/MF06187
Submitted: 18 June 2007  Accepted: 17 July 2007   Published: 27 August 2007

Abstract

Reproductive parameters of three closely-related sympatric species of wobbegong (Orectolobus ornatus, O. maculatus and O. halei) off New South Wales (NSW) were investigated to contribute to a biological basis for the management of a commercial fishery targeting wobbegongs. Estimates of the onset of maturity based on ovary condition were 729 mm, 1117 mm, and 1591 mm total length (TL) for O. ornatus, O. maculatus and O. halei respectively. The length at which 50% of the male population is mature based on clasper calcification was 803 mm, 1282 mm and 1784 mm TL for O. ornatus, O. maculatus and O. halei, respectively, and was similar to female onset of maturity based on uterus condition and to TL-at-maternity. These species of wobbegong had synchronous, triennial reproductive cycles. Follicles took 2 years to enlarge before ovulation. During the first year, follicles remained small, and then grew rapidly during the second year before ovulation during November. Gestation lasted ~10–11 months and parturition occurred during September–October. Mean litter sizes were nine (s.e. 0.5) and 21 (s.e. 1.5) for O. ornatus and O. maculatus, respectively, and increased with female total length in O. ornatus. Pregnant O. ornatus and O. maculatus were frequently caught in northern NSW and no pregnant wobbegongs, or females with large, yolky follicles were captured south of Sydney. Differences in the reproductive conditions of wobbegongs caught in northern and central NSW suggested geographically dependent reproductive behaviour. Knowledge of the reproductive parameters provided in this paper is necessary for adequate fisheries management and species conservation assessments.


Acknowledgements

The authors thank professional fishers Reala Brislane, Jason Moyce, Ian Puckeridge, Mark Phelps and Shannon Fantham for assisting with the research on their fishing vessels, and interns and volunteers for assistance with field sampling. Simon Allen and Paul Rogers provided comments that greatly improved this manuscript. Charlie Huveneers was supported by an international Macquarie University Research Scholarship. Additional financial and logistical support was provided by the Graduate School of the Environment, NSW Department of Primary Industries, Primary Industries Research Victoria (using funds associated with FRDC project 2002/033) and the Australian Geographic Society. This is contribution no. 3 from the Sydney Institute for Marine Science.


References

Braccini, J. M. , Gillanders, B. M. , and Walker, T. I. (2006). Determining reproductive parameters for population assessments of chondrichthyan species with asynchronous ovulation and parturition: piked spurdog (Squalus megalops) as a case study. Marine and Freshwater Research 57, 105–119.
| Crossref | GoogleScholarGoogle Scholar | Branstetter S., and Burgess G. H. (1996). ‘Commercial Shark Fishery Observer Program, Characterization and comparisons of the directed commercial shark fishery in the eastern Gulf of Mexico and off North Carolina through an observer program.’ Final Report. MARFIN Award NA47FF0008.

Capapé, C. , Diatta, Y. , Diop, M. , Raynaud, C. , and Guelorget, O. (2005). New data on the reproductive biology of the Atlantic weasel shark, Paragaleus pectoralis (Chondrichthyes: Hemigaleidae) from the coast of Senegal (eastern tropical Atlantic). Cybium 29, 363–371.
Carraro R. (2001). Habitat requirements, demography and site fidelity of the ornate wobbegong shark (Orectolobus ornatus) within the Fly Point/Halifax Park Aquatic Reserve of Port Stephens, NSW, Australia. Honours thesis, University of Newcastle, Ourimbah, Australia.

Cavanagh R., Kyne P., Fowler S. L., Musick J. A., and Bennett M. B. (2003). ‘The Conservation Status of Australasian Chondrichthyans. Report of the IUCN Shark Specialist Group Australia and Oceania regional red list workshop. Queensland, Australia, 7–9 March 2003.’ (The University of Queensland: Brisbane.)

Chidlow J. (2003). The biology of wobbegong sharks (family: Orectolobidae) from south-western Australian waters. Masters thesis, James Cook University, Townsville, Australia.

Colonello, J. H. , Lucifora, L. O. , and Massa, A. M. (2007). Reproduction of the angular angel shark (Squatina Guggenheim): geographic differences, reproductive cycle, and sexual dimorphism. ICES Journal of Marine Science , 131–140.
Compagno L. J. V. (2001). ‘Sharks of the World. An Annotated and Illustrated Catalogue of Shark Species Known to Date. Volume 2. Bullhead, Mackerel and Carpet Sharks (Heterodontiformes, Lamniformes and Orectolobiformes).’ (FAO: Rome.)

Conrath C. L. (2004) Reproductive biology. In ‘Technical manual for the management of elamsobranchs. FAO Fisheries Technical Paper No. 747’. (Eds J. A. Musick and R. Bonfil.) pp. 133–164. (FAO: Rome, Italy.)

Cortés, E. (2002). Incorporating uncertainty into demographic modeling: application to shark populations and their conservation. Conservation Biology 16, 1048–1062.
| Crossref | GoogleScholarGoogle Scholar | Ebert D. A. (1986). Aspects on the biology of hexanchid sharks along the Californian coast. In ‘Indo-Pacific Fish Biology: Proceedings of the Second International Conference on Indo-Pacific Fishes’. (Eds T. Uyeno, R. Arai, T. Taniuchi and K. Matsuura.) pp. 437–449. (Ichthyological Society of Japan: Tokyo, Japan.)

Hanchet, S. (1988). Reproductive biology of Squalus acanthias from the east coast, South Island, New Zealand. New Zealand Journal of Marine and Freshwater Research 22, 537–549.
Hilton-Taylor C. (2000). ‘2000 IUCN Red List of Threatened Species.’ (IUCN The World Conservation Union: Gland.)

Horie, T. , and Tanaka, S. (2002). Geographical variation of maturity size of the cloudy catshark, Scyliorhinus torazome, in Japan. Journal of the School of Marine Science and Technology Tokai University 53, 111–124.
Last P. R., and Stevens J. D. (1994).‘Sharks and Rays of Australia.’ (CSIRO: Melbourne.)

Last, P. R. , Chidlow, J. , and Compagno, L. J. V. (2006). A new wobbegong shark, Orectolobus hutchinsi n. sp. (Orectolobiformes: Orectolobidae) from southwestern Australia. Zootaxa 1239, 35–48.
Marques da Silva H., and Ross M. R. (1993). Reproductive strategies of spiny dogfish, Squalus acanthias, in the NW Atlantic. In ‘Council Meeting of the International Council for the Exploration of the Sea’. p. 18. (International Council for the Exploration of the Sea: Copenhagen, Denmark.)

Menni R. C. (1986). Shark biology in Argentina: a review. In ‘Indo-Pacific Fish Biology: Proceedings of the Second International Conference on Indo-Pacific Fishes’. (Eds T. Uyeno, R. Arai, T. Taniuchi and K. Matsuura.) pp. 425–436. (Ichthyological Society of Japan: Tokyo.)

Mollet, H. F. , and Cailliet, G. M. (2002). Comparative population demography of elasmobranchs using life history tables, Leslie matrices and stage-based matrix models. Marine and Freshwater Research 53, 503–516.
| Crossref | GoogleScholarGoogle Scholar | Pease B. C., and Grinberg A. (1995). ‘New South Wales Commercial Fisheries Statistics 1940 to 1992.’ (NSW Fisheries: Sydney.)

Peres, M. B. , and Vooren, C. M. (1991). Sexual development, reproductive cycle, and fecundity of the school shark Galeorhinus galeus off southern Brazil. Fishery Bulletin 89, 655–667.
Walker T. I. (2005). Reproduction in fisheries science. In ‘Reproductive Biology and Phylogeny of Chondrichthyes: Sharks, Rays and Chimaeras’. (Ed. W. C. Hamlett.) pp. 81–127. (Science Publishers Inc.: Enfield, NH.)

Walker, T. I. (2007). Spatial and temporal variation in the reproductive biology of gummy shark (Mustelus antarcticus) harvested off southern Australia. Marine and Freshwater Research 58, 1–31.
| Crossref | GoogleScholarGoogle Scholar |

Yamaguchi, A. , Taniuchi, T. , and Shimizu, M. (2000). Geographic variations in reproductive parameters of the starspotted dogfish, Mustelus manazo, from five localities in Japan and Taiwan. Environmental Biology of Fishes 57, 221–233.
| Crossref | GoogleScholarGoogle Scholar |