SEXUAL SELECTION IN THE TORTOISE Chelonoidis denticulata: DOMINANT PARTNER OR HEALTHY PARTNER?

Morphological variations and sexual dimorphism in Chelonoidis carbonaria (Spix, 1824) and Chelonoidis denticulata (Linnaeus, 1766) (Testudinidae).

Chelonoidis Dcarbonaria and C. denticulata are two tortoises which are widely distributed Brazil. Although they occur sympatrically in different areas, C. carbonaria prefers open areas, while C. denticulata chooses forest areas. Significant morphological variations can be observed in these species due to the fact that they occupy a vast and environmentally diverse area. Data on shell shape of c...

Preventing intimate Partner & Sexual violence

Evolution of partner selection

Partner selection is a mechanism that promotes sustainability of cooperators in cooperative dilemmas. In this paper we investigate the conditions that favour the evolution of a particular partner selection model that can be applied to any n-player game. The model allows a player to select partner combinations that satisfy his preferences. A limit case of the model is random choice of partners. ...

Functional behavior of tortoise hemoglobin Geochelone denticulata.

The hemolysate from Geochelone denticulata contains two main hemoglobin components, as shown by ion exchange chromatography and polyacrylamide gel electrophoresis (PAGE). Electrophoresis under dissociating conditions showed three types of globin chains. The apparent molecular mass, as determined by gel filtration on Sephadex G-200, was compatible with tetrameric Hb, which was unable to polymeri...

Sexual partner preference in female Japanese macaques.

Whether animals ever exhibit a preference for same-sex sexual partners is a subject of debate. Japanese macaques represent excellent models for examining issues related to sexual preference in animals because females, in certain populations, routinely engage in both heterosexual and homosexual behavior over the course of their life spans. Multiple lines of evidence indicate that female homosexu...