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4 results for “Anolis proboscis”
Data from: Use of a rostral appendage during social interactions in the Ecuadorian Anolis proboscis
The use of sexually selected characters in inter- and intra-sexual interactions has long been of interest to evolutionary biologists. Recently, a distinction between sexually selected traits as ornaments versus weapons has been advanced. We investigated the behaviour of an enigmatic lizard with a prominent sexually dimorphic trait in an effort to describe whether the trait was the product of sexual selection and further whether it functioned as a weapon or an ornament. The subject of our study was the Ecuadorian proboscis anole (Anolis proboscis), a slow-moving cryptic species endemic to the north-western slopes of the Andes in Ecuador. Males, but not females, of this species bear a rostral appendage that has been described as an exaggerated trait resulting from sexual selection. However, a thorough description of the use of the rostral appendage in social interactions is lacking. Here, we describe social interactions of this species during 11 male–female courtships and mating interactions, as well as three male–male agonistic interactions. We describe four types of displays by males, many involving the rostral appendage. We found that the rostral appendage is used as an ornament in social displays but not as a weapon in combat. We also show that, unlike other lizards with rostral appendages, male A. proboscis hatch with this structure already developed.
Figure 2 in Use of a rostral appendage during social interactions in the Ecuadorian Anolis proboscis
Figure 2. (a) Displays performed by male and female (fifth mating). (b) Beginning of chasing. Female approaches and runs past the male in the opposite direction to that in which he was facing. (c) Male bite and proboscis lifting. (d) Male stops biting and lower the rostral appendage after copulation begins. (e) Biting attempt from MIN5 (left) to MIN10 (right). (f) Proboscis used in physical contact, MIN5 (left), MIN10 (right). (g) Jaw locking between MIN27 (left) and MIN29 (right). (h) Body flattening against the branch and colour changing of MIN21 during approach and displays of MIN20. Photo credits: Diego Quirola.
Figure 1 in Use of a rostral appendage during social interactions in the Ecuadorian Anolis proboscis
Figure 1. (a) Newly hatched Anolis proboscis male. (b) A. proboscis juvenile. (c) A. proboscis adult male. (d) A. proboscis adult female. Photo credits: Santiago Ron (a), Diego Quirola (b–d).
Data from: Use of a rostral appendage during social interactions in the Ecuadorian Anolis proboscis
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