Abstract
The Sinnamary is a small tropical river (250 km long, watershed of 6500 km2) where a dam is to be impounded in 1994.
The extent of naturally periodically flooded areas along the Sinnamary river is estimated by using remote sensing (Landsat TM satellite data) and botanical groupings are described on in situ observations, ground truth and collections. The fish assemblages of these areas are described and their density estimated by rotenone sampling. The role of this ecotone to fish populations is discussed.
The extent of the inundated areas appears to be greater than previously estimated by classical mapping.
As expected, the fish fauna is mostly composed of fish juveniles and adults of dwarf (< 3 cm) and small (< 15 cm) species. Large predators where not found. Due to these characteristics, fish are abundant but their biomass is low in naturally inundated areas. However, juveniles of some species found only in these zones. Therefore their adult populations will probably be very sensitive to any modification of these land/water ecotones.
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de Morais, L.T., Lointier, M., Hoff, M. (1995). Extent and role for fish populations of riverine ecotones along the Sinnamary river (French Guiana). In: Schiemer, F., Zalewski, M., Thorpe, J.E. (eds) The Importance of Aquatic-Terrestrial Ecotones for Freshwater Fish. Developments in Hydrobiology, vol 105. Springer, Dordrecht. https://doi.org/10.1007/978-94-017-3360-1_16
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DOI: https://doi.org/10.1007/978-94-017-3360-1_16
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