Results 21 to 30 of about 4,407 (178)

THE METAMORPHOSIS OF HEMOGLOBIN IN THE BULLFROG [PDF]

Journal of General Physiology, 1951
1. Tadpole and adult hemoglobin do not differ significantly in molecular weight. The molecular weight of both is in the neighborhood of 68,000. 2. Heme-heme interaction as measured by the value of n in Hill's equation is virtually the same—about 2.8—in both tadpole and adult. 3. There appears to be no significant effect of
openaire   +2 more sources

Effects of elevated temperature, reduced hydroperiod, and invasive bullfrog larvae on pacific chorus frog larvae.

PLoS ONE, 2022
Climate change and invasive species threaten many ecosystems, including surface freshwater systems. Increasing temperatures and reduced hydroperiod due to climate change may promote the persistence of invasive species and facilitate new invasions due to ...
Bailey R Tasker, Karli N Honebein, Allie M Erickson, Julia E Misslin, Paul Hurst, Sarah Cooney, Skylar Riley, Scott A Griffith, Betsy A Bancroft   +8 more
doaj   +2 more sources

Amino acid digestibility of protein and energy ingredients of plant origin in bullfrog (Lithobates catesbeianus)

Aquaculture Reports, 2020
Due to increasing demand of ingredients of animal origin, studies on the availability of nutrients in ingredients of plant origin are worthy in carnivorous species including bullfrog.
Cleber Fernando Menegasso Mansano, Beatrice Ingrid Macente, Thiago Matias Torres do Nascimento, Marcelo Maia Pereira, Kifayat Ullah Khan, Edney Pereira da Silva, Leonardo Sussumu Takahashi, Marta Verardino de Stéfani   +7 more
doaj   +1 more source

Histocompatibility Genetics of Bullfrog Populations [PDF]

Evolution, 1961
Genetic studies of anuran species have been limited for the most part by failure of the F1 generation to reach maturity under laboratory conditions. Thus data on backcross and F2 progenies are not available and the mode of inheritance even of overt traits such as pigment patterns remains problematical (Anderson and Volpe, 1958).
W. H. Hildemann, R. Haas
openaire   +1 more source

Ranavirosis in Invasive Bullfrogs, Belgium

Emerging Infectious Diseases, 2011
To the Editor: Massive global declines in amphibians have been attributed to various causes, including infectious diseases such as chytridiomycosis and ranavirosis. Chytridiomycosis and ranaviral disease are international notifiable diseases because they have been listed by the World Organisation for Animal Health in its Animal Health Code ...
Sharifian Fard, Mojdeh, Pasmans, Frank, Adriaensen, Connie, Devisscher, Sander, Adriaens, Tim, Louette, Gerald, Martel, An   +6 more
openaire   +4 more sources

Efeito da temperatura sobre o desempenho da rã-touro (Rana catesbeiana Shaw, 1802) Temperature effect on performance of bull-frog (Rana catesbeiana Shaw, 1802)

Revista Brasileira de Zootecnia, 1999
Este estudo foi realizado para avaliar os efeitos do ambiente sobre a performance de rã-touro (Rana catesbeiana Shaw, 1802), criada em gaiolas de fibra de vidro instaladas no interior de estufas climatizadas.
Mario Roberto Chim Figueiredo, Claudio Angelo Agostinho, Fernando da Costa Baêta, Samuel Lopes Lima   +3 more
doaj   +1 more source

Spillover dynamics and asynchronous temporal fluctuations in host density and competence drive fungal parasite persistence in multi‐host, seasonal communities

Journal of Animal Ecology, EarlyView.
In this study, the authors develop a new model to show that species contributions to parasite persistence can have strong, asynchronous temporal variability, often limiting the effectiveness of targeted seasonal parasite control. The model is broadly applicable for partitioning who, when, and what drive parasite persistence in multi‐host seasonal ...
Sarah A. R. Schrock, Joseph A. DeMarchi, Billy J. Gardner, Matthew J. Gray, Michel E. B. Ohmer, Mark Q. Wilber   +5 more
wiley   +1 more source

Efeito do fotoperíodo sobre o desenvolvimento de girinos de rã-touro (Rana catesbeiana Shaw, 1802) Effect of the photoperiod on bullfrog (Rana catesbeiana Shaw, 1802) tadpoles development

Revista Brasileira de Zootecnia, 2004
O objetivo deste trabalho foi avaliar o efeito de diferentes fotoperíodos sobre o peso, comprimento e a metamorfose de girinos de rã-touro (Rana catesbeiana Shaw, 1802).
Andrea Cecchetto Bambozzi, José Teixeira de Seixas Filho, Luciana Almada Thomaz, Lídia Miyako Yoshii Oshiro   +3 more
doaj   +1 more source

Assessing the Presence, Pattern, and Environmental Correlates of Seasonal Skin Thickening in Anurans

Integrative Zoology, EarlyView.
Histological sections, like that of the ventral pectoral skin of Lithobates pipiens, were measured to assess variation in skin thickness throughout the year in three North American anuran species. After correcting for individual body size, we test whether skin thickness changes throughout the year and which factors (environment or life history) explain
Collin S. VanBuren, Lily K. Bentley, David B. Norman, Nadia B. Fröbisch   +3 more
wiley   +1 more source

Changes in Site Occupancy of Marsh‐Breeding Frogs Are Associated With Surrounding Land Cover: Implications for Conservation Planning

Animal Conservation, EarlyView.
To help ensure the growth and persistence of frog populations, we quantified changes in frog occurrence as a function of concurrent changes in land cover in the surrounding landscape of eight marsh‐breeding frog species, or groups of species. We used data from the Great Lakes Marsh Monitoring Program delivered by Birds Canada at 377 sites across four ...
Douglas C. Tozer, Simon T. Denomme‐Brown, Giuseppe E. Fiorino, Pauline E. Quesnelle, Greg P. Grabas   +4 more
wiley   +1 more source