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Alireza Shayestehfar

Alireza Shayestehfar

Academic rank: Assistant Professor
ORCID: https://orcid.org/0000-0002-5047-3303
Education: PhD.
ScopusId: 6507091716
Faculty: Science
Address: Arak University
Phone:

Research

Title
Interactive effects of temperature and food availability on the Marsh Frog (Pelophylax ridibundus) tadpoles in Western Iran
Type
JournalPaper
Keywords
Key words: Constant food; Development; Growth; Metamorphosis; Stochastic food; Survivorship.
Year
2015
Journal Asian Journal of conservation biology
DOI
Researchers Alireza Pesarakloo ، Nasrullah Rastegar Puyani ، Alireza Shayestehfar ، اسکندر Rastegar Poyani ، Masoumeh Najibzadeh ، Ahmeh Gharezi

Abstract

Knowledge of how interactions between food availability and temperature influence larval growth, development and survivorship may also be of value to amphibian conservation. In the present study, to examine the effect of temperature and food availability on larval survival, growth and development, a 2 × 2 factorial design was used. The experiment involved two rearing temperatures (20 and 27°C) and two feeding regimens (constant and stochastic food availabilities). The effects of food availability and water temperature on tadpole size were determined by measuring individual body length and photo-graphed by Stereo microscope equipped with a digital camera. Based on our results, larval growth rate was highest at the constant food and warmer temperature (27°C) treatment, whilst larval survivorship rate was highest at the constant food and cooler temperature (20°C). Furthermore, the longest meta-morphosis time was observed on constant food and temperature (20°C) whilst the shortest metamor-phosis time occurred on stochastic food and temperature (27°C). These results study strongly suggest that, environmental differences in food availability and water temperature and their interactions, cause differences in growth, development and survivorship of tadpoles in marsh frog.