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Temperaturas del suelo atípicas en áreas comunales de anidación de la iguana verde (Iguana iguana) en Colombia y Panamá

Authors: Páez Nieto, Vivian Patricia; Bok Garnier, Brian Carl; Rand, Stand;

Temperaturas del suelo atípicas en áreas comunales de anidación de la iguana verde (Iguana iguana) en Colombia y Panamá

Abstract

RESUMEN: La iguana verde (Iguana iguana) se diferencia de las otras iguanas en su capacidad de ocupar las áreas mésicas del neotrópico. Sin embargo, aún en el bosque húmedo tropical, las hembras de la iguana verde generalmente exhiben el comportamiento típico de otras especies de la familia de anidar durante la estación seca en suelos que reciben la luz directa del sol. Los estudios de laboratorio sugieren que los huevos de la iguana verde requieren temperaturas de incubación cercanas a los 30 °C. En el presente estudio, presentamos evidencias obtenidas de dos poblaciones de iguana verde que demuestran que los requerimientos de incubación de esta especie no son tan limitados como se creía anteriormente. Una de las poblaciones de estudio se encuentra en la región del Amazonas Colombiano, en la cual esencialmente no hay estación seca. En promedio, cada dos días durante el período de incubación ocurren aguaceros considerables que disminuyen significativamente las temperaturas de los nidos. La segunda población habita el bosque húmedo de Panamá central, el cual experimenta una estación seca pronunciada. Sin embargo, la escasez de áreas expuestas para la anidación en esta zona, obliga a algunas hembras a anidar dentro del bosque, pero sólo en sitios que presentan pequeñas aperturas en el dosel a través de las cuales durante períodos cortos, el suelo recibe radiación solar directa. Se comparan los períodos y temperaturas de incubación, así como el éxito de eclosión de estos sitios de anidación en sombra, con sitios de anidación más típicos para la iguana verde.

ABSTRACT: The green iguana (Iguana iguana) differs from other iguanas in its ability to inhabit mesic areas of the neotropics. Yet even in rain forest habitats, female green iguanas generally exhibit the behavior typical of the remaining species in the family of ovipositing during the dry season in soils which receive direct sunlight. Laboratory studies have suggested that green iguana eggs require incubation temperatures near 30 °C to successfully incubate. We present evidence obtained from two green iguana populations which demonstrates that the incubation requirements of this species are not as restrictive as previously believed. One population inhabits a region in the Colombian Amazon which essentially lacks a dry season. Measurable rains fall on average once every two days throughout the incubation period, significantly lowering nest temperatures. The second population inhabits rain forest in Panama which experiences a pronounced dry season. However, there is a scarcity of open areas for nesting in this area, so some females nest within the forest, but only at sites where small gaps in the canopy expose soils to short periods of direct sunlight each day. Incubation temperatures, incubation periods, and hatching success at these sites are compared to more typical green iguana nesting areas.

COL0007373

Country
Colombia
Keywords

590, Incubación de huevos, Temperaturas altas, High temperatures, http://aims.fao.org/aos/agrovoc/c_915, Eclosión, Hatching, Biogeography, Iguanidae, Construcción de nidos, Iguanas, Eggs - Incubation, Biogeografía, http://aims.fao.org/aos/agrovoc/c_32563, Nest building

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
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