caa a22 4500 477115802 CHVBK 20180405111622.0 cr unu---uuuuu 170330e19960601xx s 000 0 eng 10.1007/BF00005219 doi (NATIONALLICENCE)springer-10.1007/BF00005219 Trophically-based assessment of the impacts of deepwater sewage disposal on a demersal fish community [Elektronische Daten] [Nicholas Otway, Darryl Sullings, Norman Lenehan] Synopsis: The impacts of sewage disposal on the demersal fish community were identified after approximately 2 years of operation of a deepwater outfall off Sydney, NSW Australia. Gut-content analyses were used as a basis for identifying groups of fish with dietary similarities. Similar results from multivariate analyses (Bray-Curtis dissimilarity measure and MDS) identified 8 trophically-similar groups of fish. The majority of the fish comprising these groups consumed organisms in the soft-bottom community. Only 5 of the 8 trophic groups identified could be analysed in detail as individuals comprising the remaining groups were not caught in sufficient numbers near the outfall. Asymmetrical analyses of variance showed that the numbers of individuals and species in one particular trophic group increased significantly following the commissioning of the Bondi deepwater outfall. However, the proportional representation of individuals in the 5 trophic groups examined did not change. Five hypotheses are advanced to account for the observed impacts. Of these, hypotheses centred around increased habitat complexity and a numerical response to increases in prey abundance warrant further investigation. Directions of future research and the limitations of various designs to assess environmental impacts are discussed in light of these results. Kluwer Academic Publishers, 1996 Abundances nationallicence Diets nationallicence Pollution nationallicence Asymmetrical BACI nationallicence Environmental impact nationallicence Otway Nicholas NSW Fisheries Research Institute, Cronulla 2230, P.O. Box 21, NSW, Australia aut Sullings Darryl NSW Fisheries Research Institute, Cronulla 2230, P.O. Box 21, NSW, Australia aut Lenehan Norman NSW Fisheries Research Institute, Cronulla 2230, P.O. Box 21, NSW, Australia aut Environmental Biology of Fishes Kluwer Academic Publishers 46/2(1996-06-01), 167-183 0378-1909 46:2<167 1996 46 10641 https://doi.org/10.1007/BF00005219 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00005219 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Otway Nicholas NSW Fisheries Research Institute, Cronulla 2230, P.O. Box 21, NSW, Australia aut NATIONALLICENCE 700 1- Sullings Darryl NSW Fisheries Research Institute, Cronulla 2230, P.O. Box 21, NSW, Australia aut NATIONALLICENCE 700 1- Lenehan Norman NSW Fisheries Research Institute, Cronulla 2230, P.O. Box 21, NSW, Australia aut NATIONALLICENCE 773 0- Environmental Biology of Fishes Kluwer Academic Publishers 46/2(1996-06-01), 167-183 0378-1909 46:2<167 1996 46 10641 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer