NDLI: Effect of water quality on growth of four fish species in the Iténez basin (Upper Madera, Amazon)

Content Provider	Springer Nature Link
Author	López Siangas, Esther Pouilly, Marc Vallejos, Adamit Pérez, Tamara Rejas, Danny
Copyright Year	2012
Abstract	Fish growth is an indicator of populations’ life conditions that could be used to detect stress due to contamination. In this study, age of fishes of four species (Psectrogaster essequibensis, Schizodon fasciatus, Triportheus angulatus and Pygocentrus nattereri) from the Iténez basin (Upper Madera, Amazon) were estimated by otolith readings, and growth parameters were estimated by using the Von Bertalanffy Growth Function. Populations of four sites were compared in order to detect the effect of natural and anthropogenical water chemistry differences. One of these sites was directly impacted by gold mining activities whereas the three others were only influenced by mild human activities and presented white or clear waters. Species growth coefficient (K) varied from 0.28 (P. nattereri), to 0.39 (P. essequibensis), 0.69 (S. fasciatus) and 1.71 (T. angulatus). Due to the limited size samples, these values have to be considered as preliminary regional approximation. For S. fasciatus, P. nattereri and T. angulatus, residuals analysis of the growth function showed differences among the three unimpacted sites. However, each species exhibited different patterns of growth variations among sites, thus preventing to clearly demonstrate a general effect of water chemistry on the fish growth of these populations. On the contrary, for these three species fish growth appeared weaker in the gold-mining site.
Starting Page	371
Ending Page	381
Page Count	11
File Format	PDF
ISSN	03781909
Journal	Environmental Biology of Fishes
Volume Number	95
Issue Number	3
e-ISSN	15735133
Language	English
Publisher	Springer Netherlands
Publisher Date	2012-05-05
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Otoliths Age reading Mercury White water Clear water Freshwater & Marine Ecology Nature Conservation Animal Systematics/Taxonomy/Biogeography Zoology Environment
Content Type	Text
Resource Type	Article
Subject	Aquatic Science Ecology, Evolution, Behavior and Systematics

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