http://sedici.unlp.edu.ar:80/handle/10915/88 2026-10-10T09:09:39Z 2026-10-10T09:09:39Z Carrizo, Gustavo R. http://sedici.unlp.edu.ar:80/handle/10915/6215 2019-04-23T20:04:29Z 1990-01-01T00:00:00Z

Articulo Cuadernos de Herpetología; vol. 5, no. 6 Se realizó un estudio comparativo para aclarar el verdadero status de algunos hílidos de la provincia de Misiones; las conclusiones son las siguientes: - El material de Argentina, hasta el momento considerado como Hyla polytaenia Cope, 1870, pertenece a una nueva entidad descripta en este trabajo: Hyla caingua n. sp. - H. claresignata Lutz & Lutz. 1939, fue citada para la Argentina en base a ejemplares de H. semiguttata Lutz, 1925. - Tanto H. caingua como H. semiguttata a menudo son confundidas entre sí y con H. pulchella, por lo que se presenta en cuadro comparativo. - El material citado como H. pardalis Spix. 1824, para la Argentina corresponde a Osteocephalus langsdorffii (Duméril & Bibron, 1841), también citada para el país. - Se presenta una lista actualizada de los hílidos de Misiones.

1990-01-01T00:00:00Z Se realizó un estudio comparativo para aclarar el verdadero status de algunos hílidos de la provincia de Misiones; las conclusiones son las siguientes: - El material de Argentina, hasta el momento considerado como Hyla polytaenia Cope, 1870, pertenece a una nueva entidad descripta en este trabajo: Hyla caingua n. sp. - H. claresignata Lutz & Lutz. 1939, fue citada para la Argentina en base a ejemplares de H. semiguttata Lutz, 1925. - Tanto H. caingua como H. semiguttata a menudo son confundidas entre sí y con H. pulchella, por lo que se presenta en cuadro comparativo. - El material citado como H. pardalis Spix. 1824, para la Argentina corresponde a Osteocephalus langsdorffii (Duméril & Bibron, 1841), también citada para el país. - Se presenta una lista actualizada de los hílidos de Misiones. Filipello, Ana María Echeverría, Dinorah Diana http://sedici.unlp.edu.ar:80/handle/10915/6214 2019-04-23T20:04:26Z 1990-01-01T00:00:00Z

Articulo Cuadernos de Herpetología; vol. 5, no. 5 A sample of 88 (45 frmale and 43 nales) adults and subadults toads of Bufo arenarum has been collected in Buenos Aires province, Argentina. There has been studied the age and increments in growth by the squeletochronological method in the subdistal phalange of the third finger from the hand. Statistical regression analysis (linear and power models) were perfomed. These studys showed that: a) snowt-vent (total lenght, LT=y) and head width (AC=y) have a strong positive correlation to the estimate age (number of LAC present in the bone; E=x). The power model shows the best fitting to the female data and the linear model provide good fits to the male data. All correlation coefficients are statistically significant at 0,01 probability level. b) The equation of von Bertalanffy was fitted to the data (LT; AC): Males growth showed a weak fitting to von Bertalanffy. Female corporal growth (LT and AC) showed the best fitting to von Bertalanffy equation. It can be used 90-110 mm as the length at sexual maturity (or sexual maturity size). c) The endosteal resorption begings before males rearch the sexual maturuty (E IV). In the females the endosteal resorption starts after the sexual maturity (E V). d) The third LAC could be compleyely resorbed at E VI.

1990-01-01T00:00:00Z A sample of 88 (45 frmale and 43 nales) adults and subadults toads of Bufo arenarum has been collected in Buenos Aires province, Argentina. There has been studied the age and increments in growth by the squeletochronological method in the subdistal phalange of the third finger from the hand. Statistical regression analysis (linear and power models) were perfomed. These studys showed that: a) snowt-vent (total lenght, LT=y) and head width (AC=y) have a strong positive correlation to the estimate age (number of LAC present in the bone; E=x). The power model shows the best fitting to the female data and the linear model provide good fits to the male data. All correlation coefficients are statistically significant at 0,01 probability level. b) The equation of von Bertalanffy was fitted to the data (LT; AC): Males growth showed a weak fitting to von Bertalanffy. Female corporal growth (LT and AC) showed the best fitting to von Bertalanffy equation. It can be used 90-110 mm as the length at sexual maturity (or sexual maturity size). c) The endosteal resorption begings before males rearch the sexual maturuty (E IV). In the females the endosteal resorption starts after the sexual maturity (E V). d) The third LAC could be compleyely resorbed at E VI. Acosta, Juan Carlos Martori, Ricardo http://sedici.unlp.edu.ar:80/handle/10915/6213 2019-04-23T20:04:22Z 1990-01-01T00:00:00Z

Articulo Cuadernos de Herpetología; vol. 5, no. 4 The use of time and space was analized in a population Teius aculattus. Using the mark-recapture method daily and seasonal activity was studied. Sustrate, cloacal and air temperatures were registered. Home range was measured for three males, three females, two juveniles and one hatching using the convex poligone method. Our conclutions are that time and space are used acording to the trofic strategy of this species (widely foraging) and the thermic parameters are similar to other teids species

1990-01-01T00:00:00Z The use of time and space was analized in a population Teius aculattus. Using the mark-recapture method daily and seasonal activity was studied. Sustrate, cloacal and air temperatures were registered. Home range was measured for three males, three females, two juveniles and one hatching using the convex poligone method. Our conclutions are that time and space are used acording to the trofic strategy of this species (widely foraging) and the thermic parameters are similar to other teids species Acosta, Juan Carlos Martori, Ricardo http://sedici.unlp.edu.ar:80/handle/10915/6212 2019-04-23T20:04:19Z 1990-01-01T00:00:00Z

Articulo Cuadernos de Herpetología; vol. 5, no. 3 Using the mark-recapture method a population of Teius oculatus was studied during four month (dic. 2/1987-march 22/1988). The poblational density was measured, age groups were defined the anual cycle was described and the individual daily growth was calculated to test differences between age groups and the posible correlations between growth and individual snout vent length. Density was different for each period, the age groups were three: hatching juveniles and adults, with change during the active period, being hatching the last in retiring. Individual growth rate changed for each age group and growth and snout vent length are negatively correlated.

1990-01-01T00:00:00Z Using the mark-recapture method a population of Teius oculatus was studied during four month (dic. 2/1987-march 22/1988). The poblational density was measured, age groups were defined the anual cycle was described and the individual daily growth was calculated to test differences between age groups and the posible correlations between growth and individual snout vent length. Density was different for each period, the age groups were three: hatching juveniles and adults, with change during the active period, being hatching the last in retiring. Individual growth rate changed for each age group and growth and snout vent length are negatively correlated. Vega, Laura Estela Bellagamba, Patricio J. http://sedici.unlp.edu.ar:80/handle/10915/6211 2019-04-23T20:04:16Z 1990-01-01T00:00:00Z

Articulo Cuadernos de Herpetología; vol. 5, no. 2 A herpetofauna list of the mountains of Balcarce and Mar del Plata cities. A list of four species of Amphibians and sixteen species of Reptiles collected during four years at the ridge of mountains of Balcarce and Mar del Plata cities, is given. Brief comments about their ecology is also given. The presence of the colubrid Pseudablabes agassizii at Buenos Aires province is confirmes and two new Iguanidae of the genus Liolaemus are presented.

1990-01-01T00:00:00Z A herpetofauna list of the mountains of Balcarce and Mar del Plata cities. A list of four species of Amphibians and sixteen species of Reptiles collected during four years at the ridge of mountains of Balcarce and Mar del Plata cities, is given. Brief comments about their ecology is also given. The presence of the colubrid Pseudablabes agassizii at Buenos Aires province is confirmes and two new Iguanidae of the genus Liolaemus are presented. Echeverría, Dinorah Diana http://sedici.unlp.edu.ar:80/handle/10915/6210 2019-04-23T20:04:14Z 1990-01-01T00:00:00Z

Articulo Cuadernos de Herpetología; vol. 5, no. 1 The Bidder's organ (BO) differentiation takes place at stage 25 (stages; Echeverría et al., 1981). Oogonia and young oocytes (a and b) are placed at BO periphery. During the larval period the BO grows faster than the pregonad (=previous gonad), until the metamorphosis period occurs. On young toads (from one to three years) and on adult male toads (fourth year) the BO shows celular seasonal cycles. The celular cycles shows to steps: a) partial oogenesis in the peripherical surface with prolific and development celular process (proliferation and growth) of the oogonias and small oocytes. b) Development of the oocytes inside the organ: development up to their hypertrophy that finish in degeneration of the oldest oocytes. After that, the empty and atresic folicles take place. There is a comparision between the male and female BO development in young toads

1990-01-01T00:00:00Z The Bidder's organ (BO) differentiation takes place at stage 25 (stages; Echeverría et al., 1981). Oogonia and young oocytes (a and b) are placed at BO periphery. During the larval period the BO grows faster than the pregonad (=previous gonad), until the metamorphosis period occurs. On young toads (from one to three years) and on adult male toads (fourth year) the BO shows celular seasonal cycles. The celular cycles shows to steps: a) partial oogenesis in the peripherical surface with prolific and development celular process (proliferation and growth) of the oogonias and small oocytes. b) Development of the oocytes inside the organ: development up to their hypertrophy that finish in degeneration of the oldest oocytes. After that, the empty and atresic folicles take place. There is a comparision between the male and female BO development in young toads