Reproductive biology of the amazon lava lizard (tropidurus torquatus) from the wet Chaco of Corrientes (Argentina) : congeneric comparisons of ecotypic and interspecific variations

Herein we describe the reproductive biology of a population of the Amazon Lava Lizard (Tropidurus torquatus (Wied-Neuwied, 1820)) from Corrientes, northeastern Argentina (Wet Chaco). We describe the male and female reproductive cycles, minimum body size for adults, reproductive output, mean relative...

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Detalles Bibliográficos
Autores principales: Ortíz, Martín Alejandro, Boretto, Jorgelina Mariela, Piantoni, Carla, Álvarez, Blanca Beatriz, Ibargüengoytía, Nora Ruth
Formato: Artículo
Lenguaje:Inglés
Publicado: Canadian Science Publishing 2021
Materias:
reproductive cycle
Squamata
tropidurid
cycle de reproduction
squamates
tropiduridés
Acceso en línea:http://repositorio.unne.edu.ar/handle/123456789/28590
Aporte de:
RIUNNE - Repositorio Institucional de la Universidad Nacional del Nordeste (UNNE) de Universidad Nacional del Nordeste
id I48-R184-123456789-28590
record_format dspace
institution Universidad Nacional del Nordeste
institution_str I-48
repository_str R-184
collection RIUNNE - Repositorio Institucional de la Universidad Nacional del Nordeste (UNNE)
language Inglés
topic reproductive cycle
Squamata
tropidurid
cycle de reproduction
squamates
tropiduridés
spellingShingle reproductive cycle
Squamata
tropidurid
cycle de reproduction
squamates
tropiduridés
Ortíz, Martín Alejandro
Boretto, Jorgelina Mariela
Piantoni, Carla
Álvarez, Blanca Beatriz
Ibargüengoytía, Nora Ruth
Reproductive biology of the amazon lava lizard (tropidurus torquatus) from the wet Chaco of Corrientes (Argentina) : congeneric comparisons of ecotypic and interspecific variations
topic_facet reproductive cycle
Squamata
tropidurid
cycle de reproduction
squamates
tropiduridés
description Herein we describe the reproductive biology of a population of the Amazon Lava Lizard (Tropidurus torquatus (Wied-Neuwied, 1820)) from Corrientes, northeastern Argentina (Wet Chaco). We describe the male and female reproductive cycles, minimum body size for adults, reproductive output, mean relative clutch mass, fat body cycles, and sexual dimorphism. Our results were compared with data on the reproductive biology of Brazilian populations of T. torquatus and congeneric species. In Corrientes, males of T. torquatus exhibited a continuous reproductive cycle, but with annual variation of testicular parameters associated with spermatogenic activity. In contrast, females were reproductive only from winter to summer (July–February), laying at least two clutches each of six eggs, on average, per reproductive season. The relative clutch mass and egg size values in Corrientes were the highest reported for the species. The annual cycle of energy storage (as fat bodies) was inversely correlated with reproductive activity in both sexes. Males differed from females in snout–vent length, head size, interlimb length, and tail length. We observed interpopulational differences in relative clutch mass, egg volume and mass, incubation period and hatching time, and the minimum body size for sexual maturity probably as a result of phenotypic plasticity or adaptation to local environmental conditions and likely both.
format Artículo
author Ortíz, Martín Alejandro
Boretto, Jorgelina Mariela
Piantoni, Carla
Álvarez, Blanca Beatriz
Ibargüengoytía, Nora Ruth
author_facet Ortíz, Martín Alejandro
Boretto, Jorgelina Mariela
Piantoni, Carla
Álvarez, Blanca Beatriz
Ibargüengoytía, Nora Ruth
author_sort Ortíz, Martín Alejandro
title Reproductive biology of the amazon lava lizard (tropidurus torquatus) from the wet Chaco of Corrientes (Argentina) : congeneric comparisons of ecotypic and interspecific variations
title_short Reproductive biology of the amazon lava lizard (tropidurus torquatus) from the wet Chaco of Corrientes (Argentina) : congeneric comparisons of ecotypic and interspecific variations
title_full Reproductive biology of the amazon lava lizard (tropidurus torquatus) from the wet Chaco of Corrientes (Argentina) : congeneric comparisons of ecotypic and interspecific variations
title_fullStr Reproductive biology of the amazon lava lizard (tropidurus torquatus) from the wet Chaco of Corrientes (Argentina) : congeneric comparisons of ecotypic and interspecific variations
title_full_unstemmed Reproductive biology of the amazon lava lizard (tropidurus torquatus) from the wet Chaco of Corrientes (Argentina) : congeneric comparisons of ecotypic and interspecific variations
title_sort reproductive biology of the amazon lava lizard (tropidurus torquatus) from the wet chaco of corrientes (argentina) : congeneric comparisons of ecotypic and interspecific variations
publisher Canadian Science Publishing
publishDate 2021
url http://repositorio.unne.edu.ar/handle/123456789/28590
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spelling I48-R184-123456789-285902025-03-06T11:00:37Z Reproductive biology of the amazon lava lizard (tropidurus torquatus) from the wet Chaco of Corrientes (Argentina) : congeneric comparisons of ecotypic and interspecific variations Ortíz, Martín Alejandro Boretto, Jorgelina Mariela Piantoni, Carla Álvarez, Blanca Beatriz Ibargüengoytía, Nora Ruth reproductive cycle Squamata tropidurid cycle de reproduction squamates tropiduridés Herein we describe the reproductive biology of a population of the Amazon Lava Lizard (Tropidurus torquatus (Wied-Neuwied, 1820)) from Corrientes, northeastern Argentina (Wet Chaco). We describe the male and female reproductive cycles, minimum body size for adults, reproductive output, mean relative clutch mass, fat body cycles, and sexual dimorphism. Our results were compared with data on the reproductive biology of Brazilian populations of T. torquatus and congeneric species. In Corrientes, males of T. torquatus exhibited a continuous reproductive cycle, but with annual variation of testicular parameters associated with spermatogenic activity. In contrast, females were reproductive only from winter to summer (July–February), laying at least two clutches each of six eggs, on average, per reproductive season. The relative clutch mass and egg size values in Corrientes were the highest reported for the species. The annual cycle of energy storage (as fat bodies) was inversely correlated with reproductive activity in both sexes. Males differed from females in snout–vent length, head size, interlimb length, and tail length. We observed interpopulational differences in relative clutch mass, egg volume and mass, incubation period and hatching time, and the minimum body size for sexual maturity probably as a result of phenotypic plasticity or adaptation to local environmental conditions and likely both. Nous décrivons la biologie de la reproduction d’une population de lézards Tropidurus torquatus (Wied-Neuwied, 1820) de Corrientes, dans le nord-est de l’Argentine (Chaco humide). Nous décrivons les cycles de reproduction des mâles et des femelles, la taille minimum du corps des adultes, l’efficacité de la reproduction, la masse moyenne relative des pontes, les cycles des corps adipeux et le dimorphisme sexuel. Nos résultats sont comparés a` des données relatives a` la biologie de la reproduction de populations brésiliennes de T. torquatus et d’espèces congénères. À Corrientes, les mâles de T. torquatus présentent un cycle de reproduction continu, mais des variations annuelles des paramètres testiculaires associés a` la spermatogénèse. En revanche, les femelles ne sont reproductives que de l’hiver a` l’été (de juillet a` février), produisant aux moins deux pontes de six œufs chacune en moyenne chaque saison de reproduction. Les valeurs de la masse relative des pontes et de la taille des œufs a` Corrientes étaient les plus importantes signalées pour l’espèce. Le cycle annuel de stockage d’énergie (sous forme de corps adipeux) était inversement corrélé a` l’activité de reproduction pour les deux sexes. Les mâles se distinguaient des femelles sur le plan de la longueur museau–cloaque, de la taille de la tête, de la longueur entre les membres et de la longueur de la queue. Nous avons observé des différences entre populations en ce qui concerne la masse relative des pontes, le volume et la masse des œufs, la période d’incubation et le moment de l’éclosion, ainsi que la taille minimum du corps a` maturité sexuelle, ces différences étant probablement dues a` la plasticité phénotypique, a` l’adaptation a` des conditions ambiantes locales ou, vraisemblablement, a` une combinaison de ces deux phénomènes. [Traduit par la Rédaction] 2021-09-07T14:38:42Z 2021-09-07T14:38:42Z 2014-07-07 Artículo Ortíz, Martín Alejandro, et al., 2014. Reproductive biology of the amazon lava lizard (tropidurus torquatus) from the wet Chaco of Corrientes (Argentina): congeneric comparisons of ecotypic and interspecific variations. Canadian Journal of Zoology. Ottawa: Canadian Science Publishing, vol. 92, no. 7, p. 643–655. ISSN 1480-3283. 0008-4301 http://repositorio.unne.edu.ar/handle/123456789/28590 eng openAccess http://creativecommons.org/licenses/by-nc-nd/2.5/ar/ application/pdf application/pdf Canadian Science Publishing Canadian Journal of Zoology, 2014, vol. 92, no. 7, p. 643-655.

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