Habitat size changes morphological traits of Physalaemus albonotatus tadpoles

Desiccation exposes tadpoles to a decrease in habitat size due to a reduction in water depth and surface area. We tested the effect of surface area and water depth on growth and development of tadpoles of Physalaemus albonotatus and whether habitat size effects are constant over the larval period. We performed a 2 × 2 factorial design: two water depths and two surface areas. We measured tadpoles at 15 and 30 days after starting the experiment, and recorded weight and time to metamorphosis. Our results indicate that habitat size influences the morphology, growth, and development of tadpoles and that the response changes during development. At 15 days, tadpoles reared in shallow water had reduced their morphological variables and developmental stage, whereas tadpoles reared in enclosures with different surface areas showed no differences. At 30 days, tadpoles reared in enclosures with small surface areas had increased their body length, body height, and developmental stage, whereas tadpoles reared in different water depths showed no differences. Tadpoles reared in small surface areas reached metamorphosis earlier than tadpoles reared in large surface areas. The results suggest that during ontogeny the surface area and water depth had different influence in the phenotypic plasticity of tadpoles.

[1]  R. Wassersug,et al.  The Architecture of the Aquatic Environment and Its Influence on the Growth and Development of Tadpoles (Xenopus laevis) , 2012, Copeia.

[2]  A. I. Kehr,et al.  The effect of chemical signal of predatory fish and water bug on the morphology and development of Elachistocleis bicolor tadpoles (Anura: Microhylidae) , 2012, Biologia.

[3]  S. K. Saidapur,et al.  Receding water levels hasten metamorphosis in the frog, Sphaerotheca breviceps (Schneider, 1799): a laboratory study , 2011 .

[4]  E. Rezende,et al.  Evolution and plasticity of anuran larval development in response to desiccation. A comparative analysis , 2011, Ecology and evolution.

[5]  A. I. Kehr,et al.  Morphological and Developmental Responses of Anuran Larvae (Physalaemus albonotatus) to Chemical Cues from the Predators Moenkhausia dichoroura (Characiformes: Characidae) and Belostoma elongatum (Hemiptera: Belostomatidae) , 2011 .

[6]  P. Eterovick,et al.  Seasonal variation of tadpole spatial niches in permanent streams: The roles of predation risk and microhabitat availability , 2010 .

[7]  M. Méndez,et al.  Life‐history trait variation in tadpoles of the warty toad in response to pond drying , 2010 .

[8]  J. Buskirk.  Natural variation in morphology of larval amphibians: Phenotypic plasticity in nature? , 2009 .

[9]  F. Juncá,et al.  Effects of temperature and volume of water on the growth and development of tadpoles of Pleurodema diplolister and Rhinella granulosa (Amphibia: Anura) , 2009 .

[10]  R. Wassersug,et al.  Can Visual Stimulation Alone Induce Phenotypically Plastic Responses in Rana sylvatica Tadpole Oral Structures , 2009 .

[11]  C. N. Taylor,et al.  The role of images of conspecifics as visual cues in the development and behavior of larval anurans , 2006, Behavioral Ecology and Sociobiology.

[12]  J. R. Auld,et al.  PREDATOR- AND COMPETITOR-INDUCED PLASTICITY: HOW CHANGES IN FORAGING MORPHOLOGY AFFECT PHENOTYPIC TRADE-OFFS , 2005 .

[13]  C. Bridges.  Tadpoles Balance Foraging and Predator Avoidance: Effects of Predation, Pond Drying, and Hunger , 2002 .

[14]  R. Relyea.  COMPETITOR-INDUCED PLASTICITY IN TADPOLES: CONSEQUENCES, CUES, AND CONNECTIONS TO PREDATOR-INDUCED PLASTICITY , 2002 .

[15]  R. Griffiths,et al.  Developmental responses to pond desiccation in tadpoles of the British anuran amphibians (Bufo bufo, B. calamita and Rana temporaria) , 2000 .

[16]  P. Pearman.  Effects of pond size and consequent predator density on two species of tadpoles , 1995, Oecologia.

[17]  P. Pearman.  Effects of Habitat Size on Tadpole Populations , 1993 .

[18]  R. D. Semlitsch,et al.  EFFECTS OF EGG SIZE ON SUCCESS OF LARVAL SALAMANDERS IN COMPLEX AQUATIC ENVIRONMENTS , 1990 .

[19]  P. Pearman,et al.  Changes in Population Dynamics Resulting from Oviposition in a Subdivided Habitat , 1990, American Naturalist.

[20]  M. L. Crump.  Effect of habitat drying on developmental time and size at metamorphosis in Hyla pseudopuma , 1989 .

[21]  R. D. Semlitsch,et al.  Effects of pond drying time on metamorphosis and survival in the salamander: Ambystoma talpoideum , 1988 .

[22]  K. John,et al.  Growth and Metamorphosis of Solitary Rana pipiens Tadpoles in Confined Space , 1981 .

[23]  K. Gosner,et al.  A simplified table for staging anuran embryos and larvae with notes on identification , 1960 .

[24]  E. Adolph.  THE SIZE OF THE BODY AND THE SIZE OF THE ENVIRONMENT IN THE GROWTH OF TADPOLES , 1931 .

[25]  C. Úbeda,et al.  Adaptive plasticity of life-history traits to pond drying in three species of Patagonian anurans , 2011 .

[26]  Marta Duré,et al.  Utilización de un modelo simple de remoción para estimar el tamaño poblacional en larvas de anfibios , 2009 .

[27]  K. Wells.  The Ecology and Behavior of Amphibians , 2007 .

[28]  R. Relyea.  FINE‐TUNED PHENOTYPES: TADPOLE PLASTICITY UNDER 16 COMBINATIONS OF PREDATORS AND COMPETITORS , 2004 .

[29]  Polska Akademia Nauk. Komitet Ekologiczny.  General remarks on the productivity of confined populations , 1997 .

[30]  Polska Akademia Nauk. Komitet Ekologiczny.  The influence of the size of the cage on the numbers and density of a self-ranging popuylatrion of white mice , 1997 .

[31]  K. John,et al.  The Effects of Partitions on the Growth Rates of Crowded Rana pipiens Tadpoles , 1975 .