Results 61 to 70 of about 2,941 (182)

Morphological characterization of the gonads of bullfrog tadpoles (Lithobates catesbeianus) [PDF]

Journal of Morphological Sciences, 2015
Abstract Introduction: This work describes various aspects of early gonadal development of female and male in pre-metamorphic tadpoles (Lithobates catesbeianus) at Gosner stage 25. Materials and Methods: Ovaries and testicles were prepared for routine light microscopy for morphological study and for acridine orange technique fluroescent ...
Rizzi, G. M., Silva-Zacarin, E. C.M., Oliveira, C. R., Costa, M. J., Salla, R. F., Abdalla, F. C.   +5 more
openaire   +2 more sources

Differential Susceptibility May Not Drive Chytridiomycosis Related Declines in Multi‐Host Amphibian Communities

Ecology and Evolution, Volume 16, Issue 3, March 2026.
We investigated how Batrachochytrium dendrobatidis (Bd) affects multi‐host amphibian communities in Tasmania, Australia. Despite differential susceptibility, we found no evidence of population declines in susceptible species, suggesting that current environmental conditions may buffer communities against Bd impacts.
Elise Ringwaldt, Shannon Troy, Annie Philips, Scott Carver   +3 more
wiley   +1 more source

Many roads to reservoirs? How susceptibility and shedding shape host competence in amphibians

Functional Ecology, Volume 40, Issue 3, Page 585-598, March 2026.
Read the free Plain Language Summary for this article on the Journal blog. Abstract Host competence—the ability to acquire, harbour and transmit infections—drives pathogen spread and persistence in multi‐host communities. Evaluating species‐specific competence is critical for predicting transmission, particularly for generalist fungal pathogens like ...
Joseph A. DeMarchi, Edward D. Carter, Matthew J. Gray, Kurt R. Lutz, Sarah A. R. Schrock, Catherine L. Searle, Cassidy L. Wallace, Mark Q. Wilber   +7 more
wiley   +1 more source

Oviduct topography and irrigation in the bullfrog Lithobates catesbeianus (Shaw, 1802)

Biotemas, 2014
The bullfrog (Lithobates catesbeianus) is a species native to North America. It can reach about 20 cm in length and a body weight of 500 g. We used 30 adult frogs of the species Lithobates catesbeianus laying eggs to observe the oviduct. The animals were
Marcela Cristina Lisboa, Caio Henrique de Oliveira Carniatto, Rosângela Felipe Rodrigues, Alan Peres Ferraz de Melo   +3 more
doaj  

Performance of bullfrog tadpoles (Lithobates catesbeianus) fed balanced diets using alternative energy ingredients containing vegetable mesocarp

Revista Brasileira de Saúde e Produção Animal, 2022
The objective of this study was to evaluate the performance and metamorphosis of bullfrog tadpoles (Lithobates catesbeianus) fed balanced diets, wherein corn flour was replaced with banana, avocado, and pumpkin meal (all made without the epicarp).
J. T. S. Seixas Filho, Diego dos Santos Mello, S.C.R.P. Mello, Giselle Eler Amorim Dias, E. R. C. Pinto, William Nascimento Silva, M. M. Pereira   +6 more
semanticscholar   +1 more source

Aquatic Biodiversity of the Pampa Biome: Insights From a Scientometric and Systematic Perspective

Austral Ecology, Volume 51, Issue 3, March 2026.
ABSTRACT The Pampa biome, in South America, covers parts of Brazil, Uruguay, and Argentina. Its main characteristic is the predominance of grassland areas. The Pampa biome supports high biological diversity and a wide variety of ecosystems. In this study, we provide a comprehensive overview of biodiversity studies focusing on freshwater ecosystems of ...
Ana Paula Tavares Costa, Claudio Rossano Trindade Trindade, Isabella Menezes Pinzon, Julia Silva da Silva, Maria Gabrielle Rodrigues‐Maciel, Vitória Lima da Costa, Fabiana Schneck   +6 more
wiley   +1 more source

Nutrient enrichment alters the microbiome and increases chytrid load in the American bullfrog Lithobates catesbeianus.

Diseases of Aquatic Organisms
Agricultural practices have a profound impact on watershed dynamics, water quality, and the well-being of aquatic life. One major concern is agricultural pollution, particularly the excess of nutrients, which can elevate disease risks in various host ...
Kathy Pincus, Patrick J. Kearns, Kaitlyn Williams, D. Woodhams   +3 more
semanticscholar   +1 more source

Simulated soundscapes and transfer learning boost the performance of acoustic classifiers under data scarcity

Methods in Ecology and Evolution, Volume 17, Issue 2, Page 322-338, February 2026.
Abstract The biodiversity crisis necessitates spatially extensive methods to monitor multiple taxonomic groups for evidence of change in response to evolving environmental conditions. Programs that combine passive acoustic monitoring and machine learning are increasingly used to meet this need. These methods require large, annotated datasets, which are
Matthew J. Weldy, Damon B. Lesmeister, Tom Denton, Adam Duarte, Ben J. Vernasco, Amandine Gasc, Jennifer C. Rowe, Michael J. Adams, Matthew G. Betts   +8 more
wiley   +1 more source

Landscape‐Driven Isolation Among, but High Genetic Diversity Within, Peripheral Populations of a Threatened Frog

Diversity and Distributions, Volume 32, Issue 2, February 2026.
ABSTRACT Aim Many amphibians are experiencing declines, which are exacerbated for populations near range edges. To inform conservation strategies, we sampled sites of Blanchard's Cricket Frog (Acris blanchardi) at the northern periphery of their range to determine if modern declines are associated with genetic factors, delineate management units, and ...
Travis A. Rainey, Kirsten E. Nicholson, Caitlin P. Wells, Bradley J. Swanson   +3 more
wiley   +1 more source

The behavioral response of larval amphibians (Ranidae) to threats from predators and parasites. [PDF]

PLoS ONE, 2012
Organisms are exposed to strong selective pressures from several sources, including predators and pathogens. Response to such interacting selective pressures may vary among species that differ in life history and ecology in predictable ways.
Dorina Szuroczki, Jean M L Richardson
doaj   +1 more source