Enhancing the performance of marine reserves in estuaries: Just add water
Published source details
Gilby B.L., Olds A.D., Yabsley N.A., Connolly R.M., Maxwell P.S. & Schlacher T.A. (2017) Enhancing the performance of marine reserves in estuaries: Just add water. Biological Conservation, 210, 1-7
Published source details Gilby B.L., Olds A.D., Yabsley N.A., Connolly R.M., Maxwell P.S. & Schlacher T.A. (2017) Enhancing the performance of marine reserves in estuaries: Just add water. Biological Conservation, 210, 1-7
This study is summarised as evidence for the following.
Cease or prohibit all types of fishing in a marine protected areaAction Link
Cease or prohibit all types of fishing in a marine protected area
A site comparison study in 2015 of 22 estuaries in the Tasman Sea, Australia (Gilby et al. 2017) found that prohibiting all fishing in estuarine reserves for between seven-12 years resulted in greater abundance of two of two non-harvested fish species, but lower abundance of four of four commercially harvested fish, compared to fished areas. Average abundance of species not harvested in the region (estuary perchlet Ambassis marianus and blue catfish Neoarius graeffei) was higher in unfished estuarine reserves than fished estuaries (unfished: 0.48–9.57 ind, fished: 0.12–6.33 ind), whereas average abundance of four fisheries-targeted species (yellowfin bream Acanthopagrus australis, grey mullet Mugil cephalus, common toadfish Marilyna pleurosticta, weeping toadfish Torquigener pleurogramma) was lower in the unfished reserves (unfished: 0.06–3.16 ind, fished: 0.39–8.99 ind). In addition, fish communities were different between unfished reserve and fished estuaries (data reported as a graphical analysis). The authors noted that differences in the environmental attributes between the unfished and fished estuaries contributed to the lower abundance in unfished estuaries for harvested fish. Data were collected between June and August 2015 in six no-take (no extractive activities, including fishing; one established 1993, the rest 2008) and 16 fished estuaries in the Moreton Bay Marine Park (created 1993). Fish were surveyed twice (for 1 h) over two days at ten sites (>250 m apart) in each estuary by baited remote underwater video. Counts were made of the maximum numbers of individual fish visible by species.