Effects of freshwater canal discharge on fish assemblages in a subtropical bay:field and laboratory observations

• DOI: 10.3354/meps160161
• Publication Date: 2007-09-05T10:13:23Z
• Authors: JE Serafy; KC Lindeman; TE Hopkins; JS Ault
• Keywords: Demersal fish; Rookery

MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 160:161-172 (1997) - doi:10.3354/meps160161 Effects of freshwater canal discharge on fish assemblages in a subtropical bay: field and laboratory observations Joseph E. Serafy*, Kenyon C. Lindeman, Todd Hopkins**, Jerald S. Ault University Miami, Rosenstiel School Atmospheric Science, Division Biology Fisheries, 4600 Rickenbacker Causeway, Florida 33149, USA *E-mail: [e-mail] **Present address: Rookery Bay National Estuarine Research Reserve, 300 Tower Road, Naples, 34113-8059, A 14 mo trawl survey was conducted at 8 study sites Biscayne Bay, Florida, USA, compare species composition structure juvenile found near mouths flood control canals with those similar areas relatively stable salinity regimes. Water temperature, salinity, dissolved oxygen depth measurements were recorded during sampling bottom vegetation also quantified. The yielded total 38134 individuals from 95 taxa. Fish among sites, but more collected stable- versus variable-salinity areas. Mean abundance mean abundances Eucinostomusgula, Lagodonrhomboides, Opsanusbeta Lutjanusgriseus shared general pattern increase north south, highest values occurring one or canal-influenced sites. In contrast, richness Lucania parva, Haemulonsciurus, H. plumieri, parra significantly greater stable-salinity than Freshwater challenge experiments then each fishes above, as well 2 uncommon species, Cynoscionnebulosus Cyprinodonvariegatus. mortality groups exposed single, rapid, pulse (i.e. changed approximately 32 ppt 0 over h) compared that controls. Of dominated nearshore habitats 5 exhibited no L.rhomboides, L. plumieri 12.5, 50 100% rates, respectively. Mortality for C.nebulosus C.variegatus. Results suggest differential osmoregulatory abilities tested may underlie some, not all, structural differences observed between adjacent canals. Salinity tolerance · Canal Coastal bays Full text pdf format PreviousNextExport citation Tweet linkedIn Cited by Published Vol. 160. Publication date: December 15, 1997 Print ISSN:0171-8630; Online ISSN:1616-1599 Copyright © Inter-Research.