Título
Congenital feeding response to a novel prey in a Mexican gartersnake
Autor
FRANCISCO JAVIER MANJARREZ SILVA
CONSTANTINO DE JESUS MACIAS GARCIA
HUGH MICHAEL DRUMMOND DUREY
Nivel de Acceso
Acceso Abierto
Materias
Resumen o descripción
Articulo de investigación científica publicado en revista indizada
In this study, we explored chemosensory, ingestive and prey-catching responses of neonate Mexican Black-bellied Gartersnakes (Thamnophis melanogaster) to crayfish (Cambarellus montezumae). By comparing snakes from a recently discovered crayfisheating population and a typical non-crayfish-eating population, we asked which behavioral components change as a species enlarges its feeding niche. In the crayfisheating population chemosensory responsiveness to crayfish was not enhanced but its heritability was higher. Neonates of both populations showed similar preference for freshly-molted versus unmolted crayfish, and whereas the tendency to ingest both crayfish stages remained stable between ages 15 and 90 days in the non-crayfisheating population, in the crayfish-eating population it actually decreased. Techniques to catch and manipulate molted crayfish were similar in the two populations. We discuss the possibility that there is no increase in the behavioral response to eat crayfish by the neonates of the crayfish-eating populations, possibly due to the absence of ecological and spatial isolation between the two T. melanogaster populations. The crayfish ingestion in some population of T. melanogaster can be explained by environmental differences between populations, or by recent origin of crayfish ingestion in T. melanogaster.
Universidad Autónoma del Estado de México (3589/2013SF, 4047/2016SF, 4865/2019SF).
Editor
PeerJ
Fecha de publicación
5 de marzo de 2020
Tipo de publicación
Artículo
Recurso de información
Fuente
2167-8359
Idioma
Inglés
Relación
10.7717/peerj.8718
Audiencia
Estudiantes
Investigadores
Repositorio Orígen
REPOSITORIO INSTITUCIONAL DE LA UAEM
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