INVESTIGADORES
DIEGUEZ Maria Del Carmen
artículos
Título:
Precautionary rules for exotic trout aquaculture in fishless shallow lakes of Patagonia: minimizing impacts on the threatened Hooded Grebe (Podiceps gallardoi)
Autor/es:
.LNCELOTTI,JL., POZZI, LM., YORIO, PM., DIÉGUEZ, M.C., AND PASCUAL, M.A.
Revista:
AQUATIC CONSERVATION-MARINE AND FRESHWATER ECOSYSTEMS
Editorial:
Wiley InterScience
Referencias:
Año: 2010 vol. 20 p. 1 - 8
ISSN:
1052-7613
Resumen:
ABSTRACT1. Conflicts between habitat use and conservation are inherent to the management of wetlands. A majorchallenge for their management is to preserve habitat while addressing the demands from multiple users. Insouthern Patagonia (Argentina), a growing aquaculture activity based on rainbow trout introductions in shallowlakes is generating concerns about the effects on the waterbird fauna, including some endemic species.2. Generalized linear models (GLM) were used to analyse data on the endemic hooded grebe (Podicepsgallardoi) collected over a diverse set of lakes to: (1) build presence-absence models as a function ofenvironmental variables; (2) assess current and potential overlap with trout aquaculture; (3) explore the power ofalternative lake assignment algorithms based on habitat variables to segregate critical habitat and aquacultureactivities; and (4) explore the correlation between the probability of grebe presence and their abundance in givenlakes.3. Hooded grebe presence is clearly correlated with macrophyte cover, lake area, and water conductivity.Medium size lakes, with a combination of emerging macrophytes, adjacent to open water areas had the highestprobability of both hooded grebe presence and abundance.4. Different lake allocation scenarios are identified that could grant significant protection to hooded grebeswithout substantial losses for trout producers. The a priori probability to hold hooded grebe, assigned by themodel based on lake characteristics, provides a tool that can be used by managing authorities to deriveprecautionary management rules to regulate aquaculture and to preserve primary hooded grebe habitat.