Keywords :
Environmentally cued hatching,
Predator cues,
Rhacophoridae,
Chiromantis,
Katydid,
Hexacentrus
บทคัดย่อ :
Hatching, the life history switch point between
embryonic and larval or subadult stages, has traditionally been
regarded as a fixed event in an organism s development. This
notion has been challenged by reports of environmentally
cued hatching in recent years, which show embryos improve
fitness by hatching in response to mortality risks. Here, we
present evidence of accelerated hatching due to predation at
two points during embryonic development in Chiromantis
hansenae. Young embryos (0 day old) exposed to simulated
predation hatched earlier compared to undisturbed clutches.
Old embryos (4 days old) subjected to direct katydid predation
had more immediate responses, hatching <1 h after predation
on average. Hatching time was not correlated with female frog
size, egg attendance time, or other predator cues. Results
confirm predator-cued hatching in a new family of amphibians
and support hatching plasticity being a widespread and poten-
tially ancestral condition. We suggest mechanisms and eco-
logical basis of cue transmission and response in C. hansenae
and point out potential further research.
เอกสารอ้างอิง :
Poo, S., & Bickford, D. P. (2014). Hatching plasticity in a Southeast Asian tree frog. Behavioral ecology and sociobiology, 68(11), 1733-1740.
