EFFECTS OF REPRODUCTIVE CONDITION IN DIET IN Liolaemus parvus (LIOLAEMIDAE) IN SAN JUAN, ARGENTINA

GABRIEL CASTILLO; JUAN CARLOS ACOSTA; GRACIELA BLANCO; LASPIUR ALEJANDRO

San Juan

Congreso; SECOND JOINT MEETING OF THE BIOLOGY SOCIETIES FROM ARGENTINA; 2011

Composition analysis of the diet not only provides information onthe type of prey which feeds but also reports on the strategy usedfor feeding. The aim of this study is to provide the first data on dietof Liolaemus parvus. We compared the diet of this species betweentwo periods: reproductive (PR) and post-reproductive (PPR). Thirtythreeindividuals have been analyzed and was calculated the relativeimportance index (IRI). Degree of similarity in diet compositionthrough Sørensen index and dominance through Simpson indexbetween periods were calculed. To determine amplitude of trophicniche Shannon-Wiener diversity index was used. Percentage of plantconsumption between both periods was compared. Diet in the (PR)consist in Formicidae as ?secondary? item, whereas in (PPR)Formicidae was ?primary? and Coleoptera was ?secondary? item.Differences in plant materia consumption with a higher percentagein the (PR) (P < 0, 01) were founded. There was overlap among theitem-prey, Sørensen (Is = 0.66) between periods. Dominance incertain items there was in reproductive period (PR). No differencesin trophic amplitude for both periods were founded. L. parvus isgeneralist and omnivore species that consumes arthropods generallyin both periods.