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Abstract:

Attempts to control cougar (Puma concolor) and culpeo fox (Pseudalopex culpaeus) populations in Patagonia through poisoning, negatively affects grey foxes (Pseudalopex griseus) and many other non-target species. It is therefore advisable to develop selective predator control methods. Among a wide range of potential methods, are those based on manipulating the behaviour of non-target species. Conditioned taste aversion (CTA) develops when an animal associates taste with subsequent illness, and, after recovery, avoids the referent taste. Food aversions can be potentially useful in efforts to reduce losses of non-target species when lethal baits are distributed to control other predators. We evaluated two ways to add the aversion agent Levamisole hydrochloride to a bait to generate CTA in grey foxes. We established one control (without Levamisole) and two treatments: plain Levamisole and an ion-exchange resin complex (resinate: Amberlite® IRP-64) aiming to mask the taste of Levamisole. Foxes that ate plain Levamisole baits, ate fewer baits than those in control (26.7% plain Levamisole baits vs. 83.3% untreated baits, P=0.002) even after plain Levamisole was no longer present in the baits (40.0% vs. 86.6% untreated baits, treatment and control respectively, P=0.007). Foxes that ate Levamisole resinate baits, also ate fewer baits than those in control (50.0% Levamisole resinate baits vs. 83.3% untreated baits, P=0.043) but then resumed consumption when baits no longer contained the Levamisole resinate (73.3% vs. 86.6% untreated baits, treatment and control respectively, P=0.329). Thus, foxes that failed to detect the plain Levamisole in baits acquired CTA to the bait. Contrary to our expectations, foxes detected the Levamisole resinate, associated illness with it and so resumed eating baits as soon as the resinate was withdrawn. Additionally, in the control, where foxes were familiar with untreated "safe" baits, we repeated the treatment with Levamisole resinate baits to test latent inhibition (decrement in conditioning to a stimulus as a result of its prior exposure). We found that treated bait consumption did not decrease as before, during a similar number of days (76.6% Levamisole resinate baits vs. 83.3% untreated baits, P=0.631), suggesting that latent inhibition prevented development of CTA within our experimental time period. CTA induced among grey foxes that consume plain Levamisole baits might spare them from being poisoned in attempts to control other species of predators. © 2015.

Registro:

Documento: Artículo
Título:Conditioned taste aversion in the grey fox (Pseudalopex griseus), in Southern Argentine Patagonia
Autor:Nielsen, S.; Travaini, A.; Vassallo, A.I.; Procopio, D.; Zapata, S.C.
Filiación:Centro de Investigaciones Puerto Deseado, Universidad Nacional de la Patagonia Austral, Avenida Prefectura Naval S/N, Puerto Deseado, Santa Cruz, Argentina
Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Av. Rivadavia 1917, Buenos Aires, Argentina
Departamento de Biología, Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Mar del Plata, Mar del Plata, Argentina
Palabras clave:Behaviour; Conditioned taste aversion; Levamisole; Masking agent; Patagonia; Pseudalopex; bait; behavioral ecology; carnivore; consumption behavior; food preference; mammal; taste; Argentina; Patagonia; Animalia; Canidae; Pseudalopex; Pseudalopex culpaeus; Pseudalopex griseus; Puma concolor
Año:2015
Volumen:163
Página de inicio:167
Página de fin:174
DOI: http://dx.doi.org/10.1016/j.applanim.2014.12.006
Título revista:Applied Animal Behaviour Science
Título revista abreviado:Appl. Anim. Behav. Sci.
ISSN:01681591
CODEN:AABSE
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01681591_v163_n_p167_Nielsen

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Citas:

---------- APA ----------
Nielsen, S., Travaini, A., Vassallo, A.I., Procopio, D. & Zapata, S.C. (2015) . Conditioned taste aversion in the grey fox (Pseudalopex griseus), in Southern Argentine Patagonia. Applied Animal Behaviour Science, 163, 167-174.
http://dx.doi.org/10.1016/j.applanim.2014.12.006
---------- CHICAGO ----------
Nielsen, S., Travaini, A., Vassallo, A.I., Procopio, D., Zapata, S.C. "Conditioned taste aversion in the grey fox (Pseudalopex griseus), in Southern Argentine Patagonia" . Applied Animal Behaviour Science 163 (2015) : 167-174.
http://dx.doi.org/10.1016/j.applanim.2014.12.006
---------- MLA ----------
Nielsen, S., Travaini, A., Vassallo, A.I., Procopio, D., Zapata, S.C. "Conditioned taste aversion in the grey fox (Pseudalopex griseus), in Southern Argentine Patagonia" . Applied Animal Behaviour Science, vol. 163, 2015, pp. 167-174.
http://dx.doi.org/10.1016/j.applanim.2014.12.006
---------- VANCOUVER ----------
Nielsen, S., Travaini, A., Vassallo, A.I., Procopio, D., Zapata, S.C. Conditioned taste aversion in the grey fox (Pseudalopex griseus), in Southern Argentine Patagonia. Appl. Anim. Behav. Sci. 2015;163:167-174.
http://dx.doi.org/10.1016/j.applanim.2014.12.006