Changes to fish assemblages visiting estuarine wetlands following the closure of commercial fishing in Botany Bay, Australia

Authors

  • Neil Saintilan Department of Environment and Climate Change, PO Box A290, Sydney South, NSW 1232, Australia
  • Debashish Mazumder Australian Nuclear Science and Technology Organization (ANSTO), PMB 1, Lucas Heights, Menai, NSW 2234, Australia
  • Karen Cranney Department of Environment and Climate Change, PO Box A290, Sydney South, NSW 1232, Australia

Keywords:

mangrove, fyke net, saltmarsh, fishing-closure

Abstract

A Before-After, Control-Impact sampling design was used to measure changes in fish assemblages in intertidal mangroves and saltmarsh prior to and following the closure of commercial fishing in the Botany Bay estuary, New South Wales, Australia. Of commercial species found as juveniles in the wetlands, there was a consistent pattern of decrease in numbers compared to the pre-closure surveys. Other small wetland fish (such as the Gobiidae) were also found to have decreased in numbers, with the exception of the Common Toadfish (Tetractenos hamiltoni Gray and Richardson, 1843) and the Glassfish (Ambassis jacksoniensis Macleay, 1881). Results suggest that the immediate response of an estuarine fishery to commercial fishing closure may be a predator-mediated decline in juvenile fish of both prey and predator species.

References

Adam, P., Wilson, N. C. and Huntley, B. 1988. The phytosociology of coastal saltmarsh vegetation in New South Wales. Wetlands (Australia), 7: 35–84.

Bray, J. R. and Curtis, J. T. 1957. An ordination of the upland forest communities of southern Wisconsin. Ecol. Monogr., 27: 325–349.

Calef, G. W. 1973. Natural mortality of tadpoles in a population of Rana aurora. Ecology, 54: 741–758.

Carpenter, S. R., Kitchell, J. F., Hodgson, J. R., Cochran, P. A., Elser, J. J., Elser, M. M., Lodge, D. M., Kretchner, D., He, X. and von Ende, C. N. 1987. Regulation of lake primary productivity by food web structure. Ecology, 68: 1863–1876.

Clarke, L. D. and Hannon, N. J. 1967. The mangrove swamp and saltmarsh communities of the Sydney district. I. Vegetation, soil and climate. J. Ecol., 55: 753–771.

Clarke, K. R. and Warwick, R. M. 2001. Changes in marine communities: An approach to statistical analysis and interpretation. , 2nd edition, Plymouth, , United Kingdom: PRIMER-E.

Clarke, P. J. and Bensen, D. 1988. The natural vegetation of Homebush Bay-two hundred years of changes. Wetlands (Australia), 8: 2–15.

Fuiman, L. A. 1994. The interplay of ontogeny and scaling in the interactions of fish larvae and their predators. J. Fish Biol., 45: 55–79.

Kerfoot, W. C. and Sih, A. 1987. Predation: direct and indirect impacts on aquatic communities, New Hampshire: University Press of New England.

Mazumder, D., Saintilan, N. and Williams, R. 2005. Temporal variations in fish catch using pop nets in mangrove and saltmarsh flats at Towra Point, NSW, Australia. Wetlands Ecology and Management, 13: 457–476.

Mazumder, D., Saintilan, N. and Williams, R. 2006. Trophic relationship between itinerant fish and crab larvae in a temperate Australian saltmarsh. Mar. Freshwater Res, 57: 1–7.

Miller, T. J., Crowder, L. B., Rice, J. A. and Marchall, E. A. 1988. Larval size and recruitment mechanisms in fishes: toward a conceptual framework. Can. J. Fish. Aquat. Sci., 45: 1657–1670.

Morin, P. J. 1983. Predation, competition and the composition of larval anuran guilds. Ecol. Monogr., 53: 119–138.

Morton, R. M., Pollock, B. R. and Beumer, J. P. 1987. The occurrence and diet of fishes in a tidal inlet to a saltmarsh in southern Moreton Bay, Queensland. Australian Journal of Ecology, 12: 2127–237.

Neill, W. E. 1988. “Community responses to experimental nutrient perturbations in oligotrophic lakes”. In Size structured populations: ecology and evolution, Edited by: Ebenman, B. and Persson, L. 203–218. Berlin: Springer-Verlag.

Persson, L. 1988. “Asymmetries in competitive and predatory interactions in fish populations”. In Size structured populations: ecology and evolution, Edited by: Ebenman, B. and Persson, L. 203–218. Berlin: Springer-Verlag.

Polis, G. A., Myers, C. A. and Holt, R. D. 1989. The ecology and evolution of intraguild predation: potential competitors that eat each other. Annu. Rev. Ecol. Syst., 20: 297–330.

Power, M. E. 1987. “Predator avoidance by grazing fishes in temperate and tropical streams: importance of stream depth and prey size”. In Predation: direct and indirect impacts on aquatic communities, Edited by: Kerfoot, W. C. and Sih, A. 333–351. New Hampshire: University Press of New England.

Power, M. E. 1990. Effects of fish in river food webs. Science, 250: 811–814.

Saintilan, N. 1997. Mangroves as successional stages on the Hawkesbury River Estuary, New South Wales. Wetlands (Australia), 16(2): 99–107.

Saintilan, N. 2004. Relationships between estuarine geomorphology, wetland extent and fish landings in New South Wales estuaries. Estuar. Coast. Shelf S., 61: 591–601.

Scribner, E. A. and Kathuria, A. 1996. New South Wales Commercial Fisheries Statistics, NSW Department of Primary Industries.

Stein, R. A., Threlkeld, S. T., Sandgren, C. D., Sprules, W. G., Persson, L., Werner, E. E., Neill, W. E. and Dodson, S. I. 1988. “Size-structured interactions in lake communities”. In Complex interactions in lake communities, Edited by: Carpenter, S. R. and Carpenter, S. R. 161–180. NY: Springer-Verlag.

Werner, E. E. and Gilliam, J. F. 1984. The ontogenetic niche and species interactions in size-structured populations. Annual Review of Ecology and Systematics, 15: 393–425.

Werner, E. E., Gilliam, J. F., Hall, D. J. and Mittelbach, G. G. 1983. An experimental test of the effects of predation risk on habitat use in fish. Ecology, 64: 1540–1548.

Wilbur, H. M. 1987. Regulation of structure in complex systems: experimental temporary pond communities. Ecology, 68: 1437–1452.

Wilbur, H. M. 1988. “Interactions between growing predators and growing prey”. In Size-structured populations: ecology and evolution, Edited by: Ebenman, B. and Persson, L. 157–172. Berlin: Springer-Verlag.

Wootton, J. T. 1993. Indirect effects and habitat use in an intertidal community: interaction chains and interactions modifications. Am. Nat., 141: 71–89.

Wootton, J. T. 1994. The nature and consequences of indirect effects in ecological communities. Annu. Rev. Ecol. Syst., 25: 443–466.

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Published

2008-12-09

Issue

Vol. 11 No. 4 (2008): Checking the Pulse of Lake Ontario

Section

Research article

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