Fine-scale movements, site fidelity and habitat use of an estuarine dependent sparid
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Space use and movement patterns are largely influenced by an animal’s size, habitat connectivity, reproductive mode, and foraging behaviours; and are important in defining the broader population biology and ecology of an organism. Acoustic telemetry was used to investigate the home range, habitat use and relative movement patterns of an estuarine dependant sparid (Acanthopagrus australis, Günther). Ten fish were internally tagged with acoustic transmitters and manually tracked in a riverine estuary for four, 3-day periods. Positional data was converted into a relative index of fish movement (Minimum Activity Index, MAI), and also used to estimate kernel density distributions which approximated areas of core and total space use for each fish. Space use for A. australis was not related to fish size; although movement of each fish (MAI) increased with fish length and a reduction in water conductivity. The distance between tagged fish and mangrove habitat was correlated with time-of-day and tide level with yellowfin bream moving closer to mangroves during the daytime and on high tides. Fish movements, residency and site fidelity revealed the nature of decision-making for fish, and the conservation value of small patches of estuarine habitats.
KeywordsFish ecology Movements Foraging Site fidelity Estuary Mangrove Acoustic telemetry
We wish to thank all volunteers for assistance with fieldwork, particularly B. Harris, T. Marzullo, A. Pursche, G. Cadiou, C. Foster-Thorpe, A. Van-Neer and C. Setio. The authors wish to acknowledge the Australian Research Council and the NSW Recreational Fishing Saltwater Trust for providing resources for this project. Research was permitted under University of NSW Animal Research Permit 10/15B.
- Bainbridge R (1958) The speed of swimming of fish as related to size and to the frequency and amplitude of the tail beat. J Exp Biol 35:109–133Google Scholar
- Barker D, Allan GL, Rowland SJ, Kennedy JD, Pickles JM (2009) A guide to acceptable proceedures and practices for aquaculture and fisheries research, 3rd edn. Primary Industries (Fisheries) Animal Care and Ethics Committee, Nelson Bay, p 52Google Scholar
- Creese RG, Glasby TM, West G, Gallen C (2009) Mapping the estuarine habitats of NSW. NSW Fisheries Final Report Series No 113. Port Stephens Fisheries Institute, p 94Google Scholar
- Drucker EG (1996) The use of gait transition speed in comparative studies of fish locomotion. Am Zool 36:555–566Google Scholar
- Kailola PJ, Williams MJ, Stewart PC, Reichelt RE, McNee A, Grieve C (1992) Australian Fisheries Resources. Fisheries Research and Development Corporation, Canberra, 422 pGoogle Scholar
- Pease B, Bell J, Burchmore J, Middleton M, Pollard D (1981) The ecology of fish in Botany Bay: Biology of commercially and recreationally valuble species. In: Commission SPC (ed). Sydney. p 287Google Scholar
- Pinheiro J, Bates D, DebRoy S, Sarkar D, R Development Core Team (2012) nlme: Linear and Nonlinear Mixed Effects Models. R package version 3.1.Google Scholar
- Rowling K, Hegarty AMI (2010) Status of Fisheries Resources in NSW 2008/09. Industry and Investment, Cronulla, p 392Google Scholar
- Whitfield AK, Adams JB, Bate GC, Bezuidenhout K, Bornman TG, Cowley PD, Froneman PW, Gama PT, James NC, Mackenzie B, Riddin T, Snow GC, Strydom NA, Taljaard S, Terörde AI, Theron AK, Turpie JK, van Niekerk L, Vorwerk PD, Wooldridge TH (2008) A multidisciplinary study of a small, temporarily open/closed South African estuary, with particular emphasis on the influence of mouth state on the ecology of the system. Afr J Mar Sci 30:453–473CrossRefGoogle Scholar