Salini et al. 2007:

"The risk was evaluated on a per fishery basis and a cumulative Risk Assessment over all fisheries. This revealed up to 14 high risk species, with susceptibility to gillnets and low productivity the major factors contributing to their ‘high risk’ status. These included sawfishes (Pristis clavata, P. microdon, P. zijsron), giant shovelnose ray (Rhinobatos typus), shark ray (Rhina ancylostoma), speartooth sharks (Glyphis sp. A, Glyphis sp. C), the great hammerhead (Sphyrna mokarran), the lemon shark (Negaprion acutidens), Pig eye (Carcharhinus amboinensis) and three whaler species (C. brevipinna, C. leucas, C. limbatus)."

AND

"Due to the lack of species-specific catch data, there are a number of ecological risk assessment techniques that can be useful for assessing the risk of individual species in highly diverse and data poor assemblages impacted by a range of fisheries (Milton et al., 2001; Stobutzki et al., 2001; Stobutzki et al., 2003). Stobutzki et al. (2003) produced a preliminary risk assessment of 148 species of northern Australian sharks and rays taken in 28 fisheries based on available data. Although this assessment approach was valid, the catch composition in the fisheries assessed was largely unknown and therefore the results should be viewed with caution. In addition to the lack of fisheries catch data, species-specific biological data were also lacking for many species. For all species, 43% of the biological parameters were unknown and therefore given the highest possible rank as a precautionary approach. This resulted in the potential for overestimation of the risk to many species."

AND

"East Coast Net fishery (ECN)
Approximately 25 species were least likely to be sustainable in the ECN fishery (Figure 6.5-7). Of these, 14 species had susceptibility and recovery ranks above 2.33 and were the least sustainable species in this fishery. These species include C. amboinensis, C. brevipinna, C. leucas, C. limbatus, C.tilstoni, Glyphis sp. A, Negaprion acutidens, Pristis zijsron, P. microdon, S. mokarran. Eleven species had a susceptibility rank above 2.33 and a recovery rank between 1.66 and 2.33 and were also least likely to be sustainable. These species include Carcharhinus amblyrhynchoides, C. cautus, C. melanopterus, C. fitzroyensis, Eusphyra blochii and Rhynchobatus australiae."

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Citation and/or URL

Salini, J., Pillans, R., Ovenden, J., Buckworth, R., Gribble, N., McAuley, R. and Stevens, J. 2007, Northern Australian sharks and rays: the sustainability of target and bycatch species, phase 2. FRDC Project: 2002/064, CSIRO Marine and Atmospheric Research, Cleveland, Australia.

Spatial Coverage

Northern Australia

Temporal Coverage

Wide ranging review

Update Frequency

Not applicable 

Other Information

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