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Registros recuperados: 11
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AMBITO DE HOGAR DE LIOLAEMUS MELANOPS BURMEISTER, 1888 (Squamata: Liolaemini) EN EL CENTRO DE CHUBUT, ARGENTINA Gayana
Frutos,Nicolás; Camporro,Leonardo A; Avila,Luciano J.
Liolaemus melanops es un lagarto de mediano tamaño (hasta 90 mm LHC), que habita zonas arenosas bajas y dunas costeras en las provincias argentinas de Río Negro y Chubut. En este estudio se analizó el ámbito de hogar de una población de L. melanops en el centro de Chubut, durante el período febrero a mayo de 2005. En una cuadrícula de 100 x 100 m, todos los individuos observados fueron capturados, sexados, medidos, marcados y liberados en el mismo sitio. Mediante transectas de rumbo fijo, realizadas a intervalos regulares entre las 8:00 y las 19:00 h, fue registrada la posición de todos los individuos observados. El ámbito de hogar de cada ejemplar fue calculado utilizando el método del polígono convexo mínimo. El área promedio para los machos no fue...
Tipo: Journal article Palavras-chave: Liolaemus; Patagonia; Polígono Convexo Mínimo; Liolaemini.
Ano: 2007 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382007000200002
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Annual activity of the lizard Liolaemus occipitalis (Squamata, Liolaemidae) in the coastal sand dunes of southern Brazil Iheringia, Sér. Zool.
Bujes,Clóvis S.; Verrastro,Laura.
The activity pattern of the small sand lizard, Liolaemus occipitalis Boulenger, 1885, was investigated in the coastal sand dunes at Quintão beach (Palmares do Sul, southern, Brazil), between September 1998 and August 1999. The results showed that L. occipitalis is active all along the year, but with variations in its daily and seasonal activity patterns associated to climatic changes in the habitat. Lizard activity pattern was distributed as follows: under the sand, burrowed (73%), under vegetation (14%), dislocation (7%) and basking (6%). Mean habitat temperatures (air and substrate) were significantly different. The results indicate that L. occipitalis is a thigmothermic and heliothermic species that regulates its body temperature through behavioral...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Liolaemus; Microhabitat use; Sand dunes.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212008000100020
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Ciclo reprodutivo de machos de Liolaemus occipitalis Boulenger (Sauria, Tropiduridae) Zoologia
Verrastro,Laura; Krause,Lígia.
The aim of this work is to describe the reprodutive cycle of the males of L. occipitalis from the coastal sand-dunes of Rio Grande do Sul State, Brazil. It was carried out between April/86 and March/88, at Jardim Atlântico Beach, Tramandaí, Rio Grande do Sul. These lizards showed reprodutive activity between September and December, with a retreat period during January and February. The seasonality of the reprodutive cycle became fully evident by the monthly variation of the testicular mass, showing an inverse relation with the temperature along the year.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Tropiduridae; Liolaemus; Neotropical lizards; Reproductive cycle.
Ano: 1999 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751999000100019
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Historical Biogeography of a Clade of Liolaemus (Iguania: Liolaemidae) based on ancestral areas and dispersal-vicariance analysis (DIVA) Pap. Avulsos de Zool. (São Paulo)
Díaz Gómez,Juan Manuel; Lobo,Fernando.
Although many phylogenetic studies have been made on the genus Liolaemus, they are inappropriate for a biogeographic study because of incomplete taxon sampling. Here we develop a biogeographic analysis using a new phylogenetic study of the chiliensis group, which differs from the other studies in having his members fully represented. The biogeographic analysis presented here consists in reconstructing the ancestral area of this clade, under three different methods of analysis: Fitch Optimisation, Dispersal Vicariance Analysis and Weighted Ancestral Area Analysis. The analyses were made on phylogenies from parsimony under equally weighted characters, as well as under implied weighting. The equally weighted tree recovers most of the groupings proposed in...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Liolaemus; Chiliensis-group; Biogeography; Ancestral area; DIVA; Fitch; Patagonia; Andes.
Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0031-10492006002400001
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Lagartos iguanios del Colhuehuapense (Mioceno Temprano) de Gaiman (provincia del Chubut, Argentina) Ameghiniana
Albino,Adriana M.
Los sedimentos del Mioceno Temprano de la Formación Sarmiento en Gaiman, provincia del Chubut (Argentina) han provisto una de las más importantes colecciones de escamosos del Mioceno, incluyendo iguanios, teidos, boideos y colúbridos. En este trabajo se describen restos fragmentarios de iguanios asignados a los actuales Pristidactylus y Liolaemus, constituyendo los registros más antiguos para estos géneros. Los cambios climáticos y ambientales ocurridos durante el Neógeno en las áreas patagónicas habrían impactado diferencialmente sobre la fauna de escamosos, produciendo la retracción en la distribución de los teidos tupinambinos y las serpientes boideas y, contrariamente, la diversificación de los iguanios a ambos lados de los Andes.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Iguania; Mioceno; Patagonia; Pristidactylus; Liolaemus.
Ano: 2008 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0002-70142008000400010
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Observações sobre o comportamento de Liolaemus occipitalis em cativeiro (Sauria, Tropiduridae) Zoologia
Bujes,Clóvis Souza; Verrastro,Laura.
Liolaemus occipitalis (Boulenger, 1885) is an abundant lizard lbundalong lhe coastal dunes of Rio Grande do Sul, Brazil. Fourteen individuais were manually captured in the dunes of Quintão beach (Palmares do Sul, Rio Grande do Sul) and studied in captivity from 23/VII/92 to 30/VII/93. They were kept in a terrarium with sand substrate and vegetation collected in their habitat. Snout-vent length (SVL) and wcighted were measured weekly. They received Tenebrio molitor (Linnaeus, 1758) worms as food; water was abundant. Combats between males for food and territory, and other behavioral displays were observed, like copulation and nesting behaviors. Growth curves for each lizard were analyzed.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Tropiduridae; Liolaemus; Agonistic behavior; Captivity; Growing rate; Reproductive behavior.
Ano: 1998 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751998000400008
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REPTILES EN EL MONUMENTO NATURAL EL MORADO (REGION METROPOLITANA, CHILE): ABUNDANCIA RELATIVA, DISTRIBUCION ALTITUDINAL Y PREFERENCIA POR ROCAS DE DISTINTO TAMAÑO Gayana
Mella,Jorge E.
En este estudio se caracterizó la fauna de reptiles presentes en el Monumento Natural El Morado, Región Metropolitana, Chile. Se encontraron seis especies (cuatro lagartijas y dos culebras), cuyas abundancias fueron: Liolaemus moradoensis (40,9%), L. nigroviridis (37,7%), L. valdesianus (17,1%), L. nitidus (2,7%), Tachymenis chilensis (1,2%) y Philodryas chamissonis (0,4%). A pesar del estrecho rango altitudinal estudiado (cerca de 600 m), las distintas especies presentaron diferentes patrones de distribución: L. nitidus se encontró sólo en el piso altitudinal más bajo (menor a 1.900 msnm), mientras que L. moradoensis y L. valdesianus se encuentran sobre los 2.150 msnm (alcanzando esta última especie los 2.450 msnm, con lo que se amplía el rango...
Tipo: Journal article Palavras-chave: Reptiles saxicolas; Liolaemus; Preferencia por rocas; Nicho; Chile central.
Ano: 2007 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382007000100003
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SEXUAL AND GEOGRAPHIC VARIATION OF COLOR PATTERNS IN LIOLAEMUS TENUIS (SQUAMATA, LIOLAEMINAE) Gayana
Vidal,Marcela A; Ortiz,Juan Carlos; Labra,Antonieta.
We studied sexual and geographic variation of color patterns in the lizard Liolaemus tenuis. We counted the number of scales with different colors in two body regions, in individuals of both sexes, from three groups of populations along a latitudinal range. Color patterns showed sexual and geographic variations; females and the northern group were the darkest. The selective pressures of these color pattern variations are unclear. However, considering that L. tenuis males are territorial and polygamous, we postulate that sexual variation in color would be consequence of sexual selection involving female choice and male-male interactions (e.g. agonistic displays among males). Geographic variation may be determined by predation pressure, as there is a...
Tipo: Journal article Palavras-chave: Chromatophores; Sexual dimorphism; Lizard; Liolaemus; Chile.
Ano: 2007 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382007000100004
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Sexual dimorphism in Liolaemus occipitalis (Iguania, Tropiduridae) Iheringia, Sér. Zool.
Verrastro,Laura.
The sexual dimorphism in size, morphology and color of the lizard Liolaemus occipitalis Boulenger, 1885 was studied. Thirty-two adult males and twenty-eight adult females were sampled from a population in the Jardim do Éden beach, near Tramandaí, Rio Grande do Sul, Brazil. Size related sexual dimorphism occurred in all compared body dimensions. The largest female was 59.6 mm in snout-vent length, and the largest male was 69.3 mm. Males and females also presented differences in ventral and dorsal color pattern, and in the presence of pre-cloacal pores. The results suggest that, in Liolaemus occipitalis, sexual dimorphism in size is determined by sexual selection, competition between males and by the high energetic cost for females a few months after hatching.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Sauria; Liolaemus; Sexual dimorphism; Sexual selection.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212004000100007
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Sources of pheromones in the lizard Liolaemus tenuis RChHN
Labra,Antonieta; Escobar,Carlos A.; Aguilar,Paz M.; Niemeyer,Hermann M..
Experimental tests were conducted with the lizard Liolaemus tenuis (Tropiduridae), to determine the potential sources of pheromones used in its chemical communication, centered in the phenomenon of self-recognition. During the post-reproductive season, feces of both sexes and secretions of precloacal pores (present only in males) were tested. Stimuli were presented to lizards spread on rocks, and the number of tongue-flicks (TF) to the rocks was used as a bioassay to determine pheromone recognition. Feces contained pheromones involved in self-recognition, since lizards showed less TF confronted to rocks with suspensions of their own feces than with suspensions of feces of conspecifics or with water (control). In order to assess the chemical nature of...
Tipo: Journal article Palavras-chave: Self-recognition; Liolaemus; Precloacal secretions; Lizards; Chemical discrimination; Semiochemicals.
Ano: 2002 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2002000100013
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Utilización de marcas electrónicas "PIT tags" en Liolaemusy descripción de una técnica de implante para especies de pequeña y mediana talla Gayana
Lobos,Gabriel; Méndez,Constanza; Alzamora,Alejandra.
Los estudios de campo con reptiles, requieren en muchas oportunidades de poder contar con métodos de mareaje que permitan el seguimiento de los animales en el mediano y largo plazo y que ellos sean válidos desde la perspectiva bioética. En este trabajo, validamos la utilización de marcas electrónicas "PIT tags" (Passive Integrated Transponder) para el género Liolaemusen Chile. Nuestros resultados muestran que el uso de estas marcas fue satisfactorio en al menos 6 especies de saurios, registrándose recapturas variables según especies y un incremento importante del peso en aquellos animales recapturados. Esta técnica, representa un método de marcaje de baja invasividad en relación a otros métodos clásicos como las mutilaciones.
Tipo: Journal article Palavras-chave: PIT tags; Liolaemus; Chile; Marcaje-recaptura; Microchips.
Ano: 2013 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382013000100004
Registros recuperados: 11
Primeira ... 1 ... Última
 

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