Filling some of the gap of ecological information’s of a Brazilian Vulnerable lizard (Tropidurus hygomi)
We studied a population of Tropidurus hygomi in an area of geographic disjunction located in Brazil’s Northeast, investigating how individuals use the microhabitats, what is their daily activity in different seasons, how does growth and mass gain occur and what is the sex ratio, besides analyzing th...
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| Autores principales: | , , , |
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| Formato: | Articulo |
| Lenguaje: | Inglés |
| Publicado: |
2021
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| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/168040 |
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I19-R120-10915-168040 |
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dspace |
| institution |
Universidad Nacional de La Plata |
| institution_str |
I-19 |
| repository_str |
R-120 |
| collection |
SEDICI (UNLP) |
| language |
Inglés |
| topic |
Zoología Iguania Lizards Relictual Distribution Sergipe Serra de Itabaiana National Park Lagartos Distribuição Relictual Parque Nacional Serra de Itabaiana |
| spellingShingle |
Zoología Iguania Lizards Relictual Distribution Sergipe Serra de Itabaiana National Park Lagartos Distribuição Relictual Parque Nacional Serra de Itabaiana Santos Caldas, Francis Luiz Alves dos Santos, Rafael Oliveira Santana, Daniel Gomes Faria, Renato Filling some of the gap of ecological information’s of a Brazilian Vulnerable lizard (Tropidurus hygomi) |
| topic_facet |
Zoología Iguania Lizards Relictual Distribution Sergipe Serra de Itabaiana National Park Lagartos Distribuição Relictual Parque Nacional Serra de Itabaiana |
| description |
We studied a population of Tropidurus hygomi in an area of geographic disjunction located in Brazil’s Northeast, investigating how individuals use the microhabitats, what is their daily activity in different seasons, how does growth and mass gain occur and what is the sex ratio, besides analyzing the population dynamics and the recruitment period. We collected data patch between January and December 2008 from 6:00 to 18:00 h combining active search techniques, pitfall traps and markings on animals. We observed lizards mainly on sunny days, motionless on the sand near bushes that formed sun and shade mosaic. Sit-and-wait foraging and preference for adequate light supply are conservative behaviors for Tropidurus. The sand allows to quickly achieve optimal thermal conditions. The lizards presented extended activities, with some seasonal differences, but with a more uniformity compared to congeners in other biomes demonstrating influence of local characteristics. We observe sexual dimorphism with larger and heavier males. Distinctions in growth were noticeable between males, females and juveniles (historical influence) but not for mass gain. Sex ratio was displaced in favor of males. This is not common in the genus but could be advantageous for females in choosing better partners. There were fluctuations in population growth, probably related to climate seasonality and mortality in the juvenile phases. Tropidurus hygomi recruitment begins in the rainy season and continues until the beginning of the dry season, unlike other congeners, suggesting the action of ecological effects. We hope that our results will assist in the development of conservation strategies for the populations of T. hygomi that live on the coast (continuous distribution), besides to guiding the execution of new studies. |
| format |
Articulo Articulo |
| author |
Santos Caldas, Francis Luiz Alves dos Santos, Rafael Oliveira Santana, Daniel Gomes Faria, Renato |
| author_facet |
Santos Caldas, Francis Luiz Alves dos Santos, Rafael Oliveira Santana, Daniel Gomes Faria, Renato |
| author_sort |
Santos Caldas, Francis Luiz |
| title |
Filling some of the gap of ecological information’s of a Brazilian Vulnerable lizard (Tropidurus hygomi) |
| title_short |
Filling some of the gap of ecological information’s of a Brazilian Vulnerable lizard (Tropidurus hygomi) |
| title_full |
Filling some of the gap of ecological information’s of a Brazilian Vulnerable lizard (Tropidurus hygomi) |
| title_fullStr |
Filling some of the gap of ecological information’s of a Brazilian Vulnerable lizard (Tropidurus hygomi) |
| title_full_unstemmed |
Filling some of the gap of ecological information’s of a Brazilian Vulnerable lizard (Tropidurus hygomi) |
| title_sort |
filling some of the gap of ecological information’s of a brazilian vulnerable lizard (tropidurus hygomi) |
| publishDate |
2021 |
| url |
http://sedici.unlp.edu.ar/handle/10915/168040 |
| work_keys_str_mv |
AT santoscaldasfrancisluiz fillingsomeofthegapofecologicalinformationsofabrazilianvulnerablelizardtropidurushygomi AT alvesdossantosrafael fillingsomeofthegapofecologicalinformationsofabrazilianvulnerablelizardtropidurushygomi AT oliveirasantanadaniel fillingsomeofthegapofecologicalinformationsofabrazilianvulnerablelizardtropidurushygomi AT gomesfariarenato fillingsomeofthegapofecologicalinformationsofabrazilianvulnerablelizardtropidurushygomi |
| _version_ |
1807223617093632000 |
| spelling |
I19-R120-10915-1680402024-07-19T20:02:52Z http://sedici.unlp.edu.ar/handle/10915/168040 Filling some of the gap of ecological information’s of a Brazilian Vulnerable lizard (Tropidurus hygomi) Santos Caldas, Francis Luiz Alves dos Santos, Rafael Oliveira Santana, Daniel Gomes Faria, Renato 2021-09 2024-07-19T16:42:05Z en Zoología Iguania Lizards Relictual Distribution Sergipe Serra de Itabaiana National Park Lagartos Distribuição Relictual Parque Nacional Serra de Itabaiana We studied a population of Tropidurus hygomi in an area of geographic disjunction located in Brazil’s Northeast, investigating how individuals use the microhabitats, what is their daily activity in different seasons, how does growth and mass gain occur and what is the sex ratio, besides analyzing the population dynamics and the recruitment period. We collected data patch between January and December 2008 from 6:00 to 18:00 h combining active search techniques, pitfall traps and markings on animals. We observed lizards mainly on sunny days, motionless on the sand near bushes that formed sun and shade mosaic. Sit-and-wait foraging and preference for adequate light supply are conservative behaviors for Tropidurus. The sand allows to quickly achieve optimal thermal conditions. The lizards presented extended activities, with some seasonal differences, but with a more uniformity compared to congeners in other biomes demonstrating influence of local characteristics. We observe sexual dimorphism with larger and heavier males. Distinctions in growth were noticeable between males, females and juveniles (historical influence) but not for mass gain. Sex ratio was displaced in favor of males. This is not common in the genus but could be advantageous for females in choosing better partners. There were fluctuations in population growth, probably related to climate seasonality and mortality in the juvenile phases. Tropidurus hygomi recruitment begins in the rainy season and continues until the beginning of the dry season, unlike other congeners, suggesting the action of ecological effects. We hope that our results will assist in the development of conservation strategies for the populations of T. hygomi that live on the coast (continuous distribution), besides to guiding the execution of new studies. Nós estudamos uma população de Tropidurus hygomi em uma área de disjunção geográfica localizada no Nordeste brasileiro investigando como os indivíduos utilizam os microhabitats, como é a atividade diária nas diferentes estações do ano, de que maneira ocorre o crescimento e o ganho de massa e qual a razão sexual, além de analisar a dinâmica populacional e o período de recrutamento. Coletamos dados entre janeiro e dezembro de 2008 das 6:00 às 18:00 h, combinando técnicas de busca ativa, armadilhas de queda e marcações nos animais. Observamos lagartos principalmente em dias ensolarados, imóveis próximos a arbustos na areia em mosaico de sol e sombra. O tipo de forrageio senta-e-espera e a preferência por suprimento adequado de luz são comportamentos conservativos para Tropidurus. A areia permite atingir rapidamente a condição térmica ótima. Os lagartos apresentaram atividades prolongadas, com algumas diferenças sazonais, mas com padrão mais uniforme em comparação com congêneres de outros biomas, demonstrando influência de características locais. Observamos dimorfismo sexual, com machos maiores e mais pesados. As distinções no crescimento foram perceptíveis entre machos, fêmeas e juvenis (influência histórica), mas não para o ganho de massa. A razão sexual foi deslocada em favor dos machos. Isso não é comum no gênero, mas pode ser vantajoso para as fêmeas na escolha de melhores parceiros. Ocorreram flutuações no crescimento populacional, provavelmente relacionadas à sazonalidade climática e mortalidade nas fases juvenis. O recrutamento de Tropidurus hygomi começa no período chuvoso e adentra o início da estação seca, diferente de outros congêneres, sugerindo ação de efeitos ecológicos. Esperamos que nossos resultados auxiliem no desenvolvimento de estratégias de conservação para as populações de T. hygomi que vivem no litoral (distribuição contínua), além de nortear a execução de novos estudos. Asociación Herpetológica Argentina Articulo Articulo http://creativecommons.org/licenses/by-nc-nd/4.0/ Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) application/pdf 207-222 |