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Stock Status Overview
|Western Australia||Western Australian Vongole Fishery||WAVF||Negligible|
- Western Australian Vongole Fishery (WA)
Vongole (Katelysia spp.) is a species complex that inhabits coastal waters from Augusta in Western Australia to Port Jackson in New South Wales. They are found on sand banks in shallow bays and estuaries from the intertidal zone to a depth of 5 m1. Stock structure is unknown. However, given the short larval life span2, it is expected that Vongole in individual bays would constitute separate stocks.
Here, due to the potential for there to be a large number of stocks, assessment of stock status is presented at the management unit level—Western Australian Vongole Fishery, Ansons Bay Vongole Fishery (Tasmania), West Coast Cockle Fishing Zone (South Australia), Coffin Bay Cockle Fishing Zone (South Australia) and Port River Cockle Fishing Zone (South Australia).
Western Australian Vongole Fishery
Stock status for the Western Australia management unit is reported as negligible due to low catches by this jurisdiction. Western Australian harvest was zero from 2000–14, apart from 2004 and 2013 where harvest was 0.1 tonnes (t).
|Species||Longevity / Maximum Size||Maturity (50 per cent)|
|VONGOLES||29 years; 55 mm SL||4 years; 23–31 mm SL|
Distribution of reported commercial catch of Vongole
a Active Vessels Vongole can be collected from beaches and bay on foot therefore, ‘vessels’ are not always used. Hence, numbers of licences and fishers are presented here instead of vessel numbers. Licences refer to the number of licence holders with an endorsement to take Vongole for sale.
Effects of fishing on the marine environment
- The overall environmental impacts associated with the Vongole Fishery are considered to be low. The commercial Vongole catch represents a relatively small proportion of the biomass and, as such, there are unlikely to be significant impacts on the food chain from this fishery.
- Although the impact of cockle rakes on the benthic community is poorly understood, it is unlikely to be significant12. This is because only a small proportion of the available Vongole habitat is fished each year and communities in sand habitats, where the majority of fishing is concentrated, tend to be resilient to change. Bycatch can include juvenile prawns, juvenile crabs, juvenile fish and other molluscs. In the majority of cases, these animals are able to be released unharmed.
Environmental effects on VONGOLES
- Recruitment of Vongole is episodic6. The cause of this may be a result of an interaction between biological and environmental factors1 resulting in variable survival of the larvae in the planktonic stages, settlement, survival from settlement to recruitment. Above-average warm water and land heatwaves were inferred to have resulted in mortality of Vongole at Streaky Bay in 20148 and unseasonal severe flooding events in 2014 were implicated as the cause of mortality in the Ansons Bay Vongole Fishery (Tasmania)4. These events are expected to increase in severity and frequency under most climate change scenarios13.
- 1 Cantin, A 2010, Population biology of two sympatric mud cockles, Katelysia peronii and K. scalarina (Bivalvia: Veneridae), with implications for their management, PhD thesis, Flinders University, Adelaide.
Gluis, MR and Li, X 2014, Hatchery manual for larval rearing of Vongole Katelysia rhytiphora, Fisheries Research and Development Corporation Project 2009/208, South Australian Research and Development Institute (Aquatic Sciences), Adelaide.
Department of Primary Industries and Water 2007, Shellfish fishery policy document, Wild Fisheries Management Branch, DPIW, Hobart.
- 4 Tarbath, D and Gardner, C 2015, Small Bivalve Fishery assessment. Institute for Marine and Antarctic Studies Report, University of Tasmania, Hobart.
Primary Industries and Regions South Australia 2013, Management plan for the South Australian Commercial Marine Scalefish Fishery, South Australian Fisheries Management Series: Paper 59, PIRSA, Adelaide.
- 6 Dent, J, Mayfield, S and Carroll, J 2016, Harvestable biomass of Katelysia spp. in the South Australian commercial Mud Cockle Fishery, Report to Primary Industries and Regions South Australia, Fisheries and Aquaculture, SARDI Publication F2014/000191-2, SARDI Research Report Series 898, SARDI, Adelaide.
Dent, J, Mayfield, S, Burch, P, Gorman, D and Ward, TM 2012, Distribution, harvestable biomass and fisheries biology of Katelysia spp. in the South Australian commercial Mud-Cockle Fishery, Fishery assessment report for Primary Industries and Regions South Australia Fisheries and Aquaculture, SARDI Publication F2010/000263-2, SARDI Research Report Series 595, South Australian Research and Development Institute (Aquatic Sciences), Adelaide.
- 8 Dent, J, Mayfield, S, Ferguson, G, Carroll, J and Burch, P 2014, Harvestable biomass of Katelysia spp. in the South Australian commercial Mud Cockle Fishery, Fishery assessment report for Primary Industries and Regions South Australia Fisheries and Aquaculture, SARDI publication F2014/000191-1, SARDI research report series 766, South Australian Research and Development Institute (Aquatic Sciences), Adelaide.
Gorman, D, Mayfield, S, Burch, P and Ward, TM 2010, Distribution, harvestable biomass and fisheries biology of Katelysia spp. in the South Australian commercial mud cockle fishery, Fishery assessment report for PIRSA Fisheries, SARDI Publication F2010/000263-1, SARDI Research Report Series 442, South Australian Research and Development Institute (Aquatic Sciences), Adelaide.
- 10 Riley, SP, Green, RM, Zacharin, W and Maguire, GB 2005, Growth models and age determination for the intertidal venerid clam Katelysia scalarina (Lamarck 1818) from three sites in Tasmania, Australia, Fisheries Research and Development Corporation Project 93/232, in GB Maguire (ed) Enhancing Tasmanian clam resources, FRDC, Tasmania.
- 11 Giri, K and Hall, K 2015, South Australian recreational fishing survey 2013–14, Fisheries Victoria Internal Report Series No. 62, Victoria.
- 12 Primary Industries and Regions South Australia 2011, Ecologically sustainable development (ESD) risk assessment of the South Australian Marine Scalefish Fishery, Primary Industries and Regions South Australia, Adelaide.
Hobday, AJ, Poloczanska, ES and Matear, RJ (ed.s) 2008, Implications of climate change for Australian fisheries and aquaculture: a preliminary assessment, Report to the Australian Government Department of Climate Change, Canberra.