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Growth in amphibians
1School of Life Sciences, Sambalpur University, India.
Gerontology
|January 1, 1994
Summary
Amphibian growth involves two distinct phases: aquatic larval and terrestrial adult. Different growth models describe each phase, highlighting unique endocrine regulation during amphibian development.
Area of Science:
- Amphibian biology
- Developmental biology
- Comparative physiology
Background:
- Amphibians exhibit complex life cycles with aquatic larvae and terrestrial adults.
- These distinct life stages possess unique morphologies, physiologies, and behaviors.
- This necessitates understanding discontinuous growth patterns in amphibians.
Purpose of the Study:
- To analyze the distinct growth phases in amphibians.
- To identify appropriate growth models for larval and adult stages.
- To investigate the endocrine regulation of amphibian growth across habitats.
Main Methods:
- Application of sigmoid growth models.
- Utilizing the double exponential Gompertz equation for larval growth.
- Employing the von Bertalanffy growth model for terrestrial growth.
Main Results:
- Amphibian growth occurs in two discontinuous phases, fitting sigmoid models.
- Larval growth is rapid, described by the Gompertz equation.
- Adult terrestrial growth is slower, described by the von Bertalanffy model, and influenced by environmental factors.
Conclusions:
- Amphibian growth is characterized by two distinct stages, each requiring specific growth models.
- The majority of amphibian growth occurs during the terrestrial phase.
- Pituitary action in growth regulation differs between aquatic and terrestrial amphibian phases.