Results 61 to 70 of about 99,660 (206)

Parallel Morphological and Functional Development in the Xenopus Retinotectal System

open access: yesDevelopmental Neurobiology, Volume 86, Issue 1, January 2026.
ABSTRACT The retinotectal projection in Xenopus laevis is topographically organized. During the early development of the Xenopus visual system, the optic tectum increases considerably in volume, and retinotectal axons and dendrites undergo extensive activity‐dependent remodeling.
Vanessa J. Li   +3 more
wiley   +1 more source

Monitoring the Prevalence and Distribution of Chytrid Fungus (Batrachochytrium dendrobatidis) in the Kihansi Spray Toad (Nectophrynoides asperginis) Population in the Kihansi Gorge Spray Wetlands, Tanzania

open access: yesEcology and Evolution, Volume 16, Issue 1, January 2026.
How to manage the continued impact of Chytrid fungus on Kihansi Spray Toad population in the wild. ABSTRACT Chytridiomycosis, caused by the fungus Batrachochytrium dendrobatidis (Bd), is fatal to some amphibian species, whereas others can carry the pathogen without developing disease.
Devolent T. Mtui   +16 more
wiley   +1 more source

Brief Note: Helminths of the Frogs, Rana catesbeiana, Rana clamitans, and Rana palustris, from Coshocton County, Ohio [PDF]

open access: yes, 1998
Author Institution: Biology, Shenango Campus, Pennsylvania State UniversityForty-three Rana catesbeiana, 120 Rana clamitans, and 5 Ranapalustris from the Wills Creek drainage system in Coshocton County, OH, were examined for helminths.
DeWolf, William F., II   +1 more
core   +1 more source

Evaluating the Use of Environmental DNA as a Method to Determine Occupancy and Distribution of Coeur d'Alene Salamanders in Montana

open access: yesEcology and Evolution, Volume 16, Issue 1, January 2026.
The purpose of this project was to evaluate the efficacy of eDNA sampling to determine occupancy of Coeur d'Alene salamanders, an “imperiled” species in Montana. Previous methods used to identify occupied sites were haphazard with no measure of detection probability. Due to the unique habitat used by these salamanders (seeps and waterfall spray zones),
Jessica A. Coltrane   +5 more
wiley   +1 more source

Omega-3 fatty acids in muscle from Rana catesbeiana : Shaw, 1802, “bullfrog” [PDF]

open access: yes, 2023
Introduction: According to international health organizations, human diet should be poor in salt, sugar, saturated (SFA) and hydrogenated (trans) fatty acids and rich in unsaturated fatty acids (UFA, particularly omega-3) and fiber.
Martínez Zabala, S.   +4 more
core  

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

open access: yesRevista 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   +3 more
doaj   +1 more source

The Evolution of Mating Strategies in Bullfrogs, Rana catesbeiana [PDF]

open access: yesEvolution, 1978
Mating system theory is undergoing considerable revision and elaboration (for example: Fisher, 1958; Brown, 1964; Williams, 1966, 1975; Orians, 1969; Cody, 1971; Trivers, 1972; Alexander, 1975; Emlen and Oring, 1977; Alexander and Borgia, 1978). These theories are based upon Darwin's (1871) concept of how natural selection acts within and between the ...
openaire   +3 more sources

Conjugated Bile Acids Enhance Growth Performance, Liver Health, and Bile Acid Metabolism in Pearl Gentian Grouper Fed a High Plant‐Protein Diet

open access: yesAquaculture Nutrition, Volume 2026, Issue 1, 2026.
The conjugation states of bile acids (BAs) have been demonstrated to affect BAs regulatory functions. This study aimed to investigate the effects of conjugated or non‐conjugated BA additions on growth performance, liver health, and BA metabolism in pearl gentian grouper (Epinephelus lanceolatus♂ × E.
Fan Wang   +12 more
wiley   +1 more source

Systematics of the Rana catesbeiana species group and the phylogenetic informativeness of anuran vocalizations.

open access: yes, 1996
The Rana catesbeiana group, commonly known as bullfrogs, is a small group found in Eastern North America. It is diagnosed from other Rana by the presence of sexually dimorphic tympana, post-tympanic folds, over wintering tadpoles, submetacentric ...
Wolf, Alan Jeffrey
core   +5 more sources

ESTAÇÃO DE REPRODUÇÃO DA Rana catesbeiana Shaw, 1802 , CRIADO EM RANÁRIO COMERCIAL E A INFLUí­Å NCIA DE FATORES CLIMÁTICOS SOBRE O Ní­Å¡MERO DE RESERVAS

open access: yesBoletim do Instituto de Pesca, 2018
Foram determinados a época de reprodução e os efeitos de fatores climáticos sobre o número de desovas diárias em 2000 casais de "rã-touro", Rana catesbeiana Shaw, 1802, criados em ranário comercial, nos anos de 1978 a 1979 e 1981 a 1982. A reprodução da
Dorival FONTANELLO   +6 more
doaj  

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