Faculty Publications

Title

Good vibrations? Sibling embryos expedite hatching in a turtle

SelectedWorks Author Profiles:

J. Sean Doody

Document Type

Article

Publication Date

2012

Date Issued

January 2012

Date Available

January 2012

ISSN

0003-3472

Abstract

A rare and remarkable animal behaviour is communication among embryos within a clutch of eggs. For example, embryonic vocalizations facilitate synchronous hatching in some birds and crocodilians. Synchronous hatching in nonvocalizing turtles suggests a different mechanism of embryonic communication: vibration-induced hatching. We addressed the idea that embryos can communicate with one another via vibrations that expedite hatching in the pig-nosed turtle, Carettochelys insculpta, a species that has evolved rapid hatching in response to hypoxia during nest flooding. Laboratory experiments tested the hypotheses that groups of (sibling) embryos can hatch and emerge more rapidly than solitary embryos, and that a vibration cue can expedite hatching relative to a hypoxic cue alone. We first demonstrated a vibration cue for hatching: vibration-induced hatching latency (ca. 8 min) was shorter than the hypoxia-induced hatching latency (ca. 16 min). Second, latency to both hatching and emergence from experimental nests was significantly shorter in groups of eggs than solitary eggs, when subjected to hypoxic conditions (perfusion in gaseous nitrogen or immersion in water, respectively). Although we did not directly link vibrations and the sibling effect, leaving open the possibility of embryo vocalizations, our experiments, along with a simple mathematical model, suggest that pig-nosed turtle embryos can detect and respond to sibling vibrations, and that these embryonic signals may increase the survival of siblings by reducing the latency to hatch and emerge under flood conditions. Our results are also novel in revealing multiple hatching cues in a single species within a single environmental context. 2012 The Association for the Study of Animal Behaviour. Published by Elsevier Ltd.

Comments

Citation only. Full-text article is available through licensed access provided by the publisher. Members of the USF System may access the full-text of the article through the authenticated link provided.

Language

en_US

Publisher

ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD

Creative Commons License

Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.

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