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Providing evidence to improve practice

Individual study: Submerged macrophyte control with herbivorous fish in irrigation channels of semiarid Argentina

Published source details

Armellina A.A.D., Bezic C.R. & Gajardo O.A. (1999) Submerged macrophyte control with herbivorous fish in irrigation channels of semiarid Argentina. Hydrobiologia, 415, 265-269


This study is summarised as evidence for the intervention(s) shown on the right. The icon shows which synopsis it is relevant to.

Parrot’s feather: Biological control using herbivores Control of Freshwater Invasive Species

A replicated, randomized, controlled study from November 1996 to February 1997 in a water channel in Argentina (Armellina et al. 1999) found that stocking with grass carp Ctenopharyngodon idella reduced the biomass of aquatic plants, including parrot’s feather Myriophyllum aquaticum. After two months, dry weight of aquatic plants was lower in plots with grass carp at both low (50 g/m2) and high stocking densities (10 g/m2) than in plots without carp (320 g/m2). The experiment was performed in a medium size water channel with an aquatic plant community dominated by Potamogeton pectinatus, M. aquaticum and Chara contraria. Aquatic plant biomass was measured four times (sampling frequency not provided) in nine 30 m-long plots separated by iron barriers with plastic nets. Carp stocking density was 100 kg/ha (low density) and 200 kg/ha (high density).

(Summarised by Ricardo Rocha)