Abstract

WASIW G, José  and  YEPEZ P, Víctor. Evolution of the population status of prawn Cryphiops Caementarius on Cañete River (2000-2015). Rev. investig. vet. Perú [online]. 2017, vol.28, n.1, pp.13-32. ISSN 1609-9117.  http://dx.doi.org/10.15381/rivep.v28i1.12942.

Based on surveys in the Cañete river (Peru) in the period 2000-2015, information concerning fisheries and biological aspects of the population of fresh water prawn Cryphiops caementarius is reported. Also, physicochemical parameters of water qualitywere determined to establish the relationship between these and resource distribution throughout the watershed prospected. The main results indicate a minimum fraction of individualswithabove120mmsize (<5%).According tothe analysisofthe «b»parameter of the length-weight relationship, the evaluated population will be composed of individuals with a higher weight relative to their size, higher proportion of male specimens, and higher density and mean biomass in the lower altitudinal strata. The density and average biomass resource calculated for the Cañete river tends to recover after the critical situation reached in 2012. Oral knowledge of increased fishing pressure, illanthropogenic alterations in river basins evaluated was noted.

Keywords : fresh water prawn; Cañete river; illegal fishing; densianthropogenic pollution.

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