Publications by authors named "I De la Riva"
The flat-headed frog, , is a poorly known, riverine species, endemic to the province of Palawan in the Philippines. We applied capture-mark-recapture (CMR) methods to follow individuals at two sites (Malbato and San Rafael) in the island of Busuanga over 10 months in 2022-2023. We used passive internal transponders (PITs) to mark adult and subadults and single-colored visual internal elastomers (VIEs) for cohorts of juveniles.
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- Male frogs use specific calls to attract mates and avoid competition, with their call characteristics influenced by their size and environment.
- The acoustic adaptation hypothesis suggests that frogs evolve their calls to improve their reach and clarity in their habitats.
- Research on Neotropical treefrogs revealed a significant relationship between body size and call frequency, but did not support the AAH claims linking calls to environmental factors, suggesting other influences like female choice may play a role.
Centrolenidae is a Neotropical family widely distributed in Central and South America, with its species richness concentrated in the tropical Andes. Several taxonomic problems have been identified within this family, mostly related to species with broad geographic distributions. In this study, we assessed and redefined the species boundaries of the species complex, and formally described two new species from the Andes of Ecuador.
View Article and Find Full Text PDFFemale and male hosts may maximise their fitness by evolving different strategies to compensate for the costs of parasite infections. The resulting sexual dimorphism might be apparent in differential relationships between parasite load and body condition, potentially reflecting differences in energy allocation to anti-parasitic defences. For example, male lacertids with high body condition may produce many offspring while being intensely parasitised.
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