http://sedici.unlp.edu.ar:80/handle/10915/87 Sat, 07 Nov 2026 13:10:01 GMT 2026-11-07T13:10:01Z http://sedici.unlp.edu.ar:80/handle/10915/6209 Articulo The snake fauna of El Bagual Ecological Reserve, Formosa: abundance, habitat utilization and situational state. Cuadernos de Herpetología; vol. 4, no. 3 From records made during eight months consisting of direct observations and some captures, the snake fauna was analyzed to know specific composition, abundance and states of conservation. Each species was associated to the habitat where was found. Although bibliographical record cites 60 species, 19 were found within the protected area. Five were categorized to be very abundant, nine abundant, three common and two scarce. The snake fauna was also analyzed to describe functional guilds according to specific habits and an index of community similarity was considered. High and low grasslands together with the forests supported the highest number of species and in a finally situational states of wild fauna, two potential management problems are expected. One of them with venemous snake fauna which would require a future regulation management, and the other with boids requiring a conservation management technique. Sun, 01 Jan 1989 00:00:00 GMT http://sedici.unlp.edu.ar:80/handle/10915/6209 1989-01-01T00:00:00Z From records made during eight months consisting of direct observations and some captures, the snake fauna was analyzed to know specific composition, abundance and states of conservation. Each species was associated to the habitat where was found. Although bibliographical record cites 60 species, 19 were found within the protected area. Five were categorized to be very abundant, nine abundant, three common and two scarce. The snake fauna was also analyzed to describe functional guilds according to specific habits and an index of community similarity was considered. High and low grasslands together with the forests supported the highest number of species and in a finally situational states of wild fauna, two potential management problems are expected. One of them with venemous snake fauna which would require a future regulation management, and the other with boids requiring a conservation management technique. http://sedici.unlp.edu.ar:80/handle/10915/6208 Articulo Microanatomy and histogenesis of the oral apparatus of Bufo arenarum tadpoles (Anura, Bufonidae) Cuadernos de Herpetología; vol. 4, no. 2 During the larval period of Bufo arenmum, the horny teeth of the oral apparatus are developed from column of cells. Each column of cells is composed of a few number of epithelial cells catefully arranged and placed perpendicularly either to the edge of the beak or to the labial ridge. The beak column shows: 3 to 4 discoidal cells; 2 to 3 preconic cells; a variable number of conic cells in differents stages of the keratinizition process;a variable number of kentinized cells (beak tooth). The labial ridge column shows: 1 spherical basal cell; 1 ovoidal cell; 1 odontoid (or dental) cell; 1 or 2 cells in different stage of keratinization procees; keratinized cells (labial tooth). There is another cell (attendant cell) that is placed beside each odontoid cells up to whole keratinization. This attendant cell gives stability to the tooth base (or horny sheath), before the tooth appeirs to the tip of the labial ridge. The columns are supported by the surrounding epithelial cells. The homy sheath gives protection to the first group of labial teeth; allow the change of the old tooth to the next one without affecting it; it also lodges the attendant cell. The histogenesis process begins in the beak at stage 21 and in the labial ridge at stage 22. The keratinization process begins in stage 23 in both structures of the oral apparatus. Sun, 01 Jan 1989 00:00:00 GMT http://sedici.unlp.edu.ar:80/handle/10915/6208 1989-01-01T00:00:00Z During the larval period of Bufo arenmum, the horny teeth of the oral apparatus are developed from column of cells. Each column of cells is composed of a few number of epithelial cells catefully arranged and placed perpendicularly either to the edge of the beak or to the labial ridge. The beak column shows: 3 to 4 discoidal cells; 2 to 3 preconic cells; a variable number of conic cells in differents stages of the keratinizition process;a variable number of kentinized cells (beak tooth). The labial ridge column shows: 1 spherical basal cell; 1 ovoidal cell; 1 odontoid (or dental) cell; 1 or 2 cells in different stage of keratinization procees; keratinized cells (labial tooth). There is another cell (attendant cell) that is placed beside each odontoid cells up to whole keratinization. This attendant cell gives stability to the tooth base (or horny sheath), before the tooth appeirs to the tip of the labial ridge. The columns are supported by the surrounding epithelial cells. The homy sheath gives protection to the first group of labial teeth; allow the change of the old tooth to the next one without affecting it; it also lodges the attendant cell. The histogenesis process begins in the beak at stage 21 and in the labial ridge at stage 22. The keratinization process begins in stage 23 in both structures of the oral apparatus. http://sedici.unlp.edu.ar:80/handle/10915/6207 Articulo Cuadernos de Herpetología; vol. 4, no. 1 El objetivo de este trabajo es tratar de establecer los hábitos alimentarios de Liolaemus scapularis como base para esclarecer sus interrelaciones en una comunidad de médanos continentales. Se determinó talle, sexo y estadio sexual de los ejemplares colectados en Cafayate, Salta, Argentina. En el análisis del contenido estomacal se consideró número y volumen para cada uno de los items-presa identificados taxonómicamente. Del análisis de los resultados se concluye que: 1) existiría un alimento base de la dieta (coleópteros), y alimentos alternativos, principalmente materia vegetal y arácnidos; y 2) los alimentos están distribuidos en forma diferente entre machos y hembras, juveniles y adultos. Sun, 01 Jan 1989 00:00:00 GMT http://sedici.unlp.edu.ar:80/handle/10915/6207 1989-01-01T00:00:00Z El objetivo de este trabajo es tratar de establecer los hábitos alimentarios de Liolaemus scapularis como base para esclarecer sus interrelaciones en una comunidad de médanos continentales. Se determinó talle, sexo y estadio sexual de los ejemplares colectados en Cafayate, Salta, Argentina. En el análisis del contenido estomacal se consideró número y volumen para cada uno de los items-presa identificados taxonómicamente. Del análisis de los resultados se concluye que: 1) existiría un alimento base de la dieta (coleópteros), y alimentos alternativos, principalmente materia vegetal y arácnidos; y 2) los alimentos están distribuidos en forma diferente entre machos y hembras, juveniles y adultos.