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Observations on the reproductive biology of three catsharks (Carcharhiniformes: Scyliorhinidae: Asymbolus and Figaro) from the continental shelf of southern Queensland, Australia.

Kyne, P.M. and Courtney, A.J. and Bennett, M.B. (2011) Observations on the reproductive biology of three catsharks (Carcharhiniformes: Scyliorhinidae: Asymbolus and Figaro) from the continental shelf of southern Queensland, Australia. Journal of the Marine Biological Association of the United Kingdom, 91 (6). pp. 1157-1164.

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Article Link(s): http://dx.doi.org/10.1017/S0025315410001670

Publisher URL: http://www.cambridge.org

Abstract

Three species of Australian endemic catsharks (grey spotted catshark Asymbolus analis, orange spotted catshark A. rubiginosus and Australian sawtail shark Figaro boardmani) were collected from the trawl grounds of a highly seasonal commercial fishery off southern Queensland, Australia. Specimens were collected on the mid to outer continental shelf at depths between 78 and 168 m. This study provides the first information on the reproductive biology of these three poorly-known species. Mature female and male A. analis were observed from 455 mm total length (TL), mature female A. rubiginosus from 410 mm TL, mature male A. rubiginosus from 405 mm TL, mature female F. boardmani from 402 mm TL and mature male F. boardmani from 398 mm TL (although a lack of immature specimens precluded more accurate assessments of size at maturity). The reproductive mode of all species was confirmed as single oviparous (carrying only one egg case in each uterus at a time). Ovarian fecundity (the number of vitellogenic follicles) ranged from 7-20 in A. analis, 5-23 in A. rubiginosus and 9-13 in F. boardmani. Several indicators suggest that Asymbolus catsharks off southern Queensland are reproductively active year-round. The proportion of female A. rubiginosus carrying egg cases was highest in spring (60%), intermediate in autumn (50%) and lowest in winter (44%).

Item Type:Article
Corporate Creators:Department of Employment, Economic Development & Innovations (DEEDI), Fisheries Queensland
Business groups:Fisheries Queensland
Additional Information:© Marine Biological Association of the United Kingdom 2010.
Keywords:Scyliorhinidae; Asymbolus analis; Asymbolus rubiginosus; Figaro boardmani; Queensland; East Coast Trawl Fishery; size at maturity; reproductive seasonality; galeus-melastomus chondrichthyes; shark cephaloscyllium-laticeps; blackmouth catshark; coast; canicula; dogfish.
Subjects:Aquaculture and Fisheries > Fisheries > By region or country > Australia
Aquaculture and Fisheries > Fisheries > Fishery research
Deposited On:29 Nov 2011 07:03
Last Modified:05 Sep 2016 03:59

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