Results 21 to 30 of about 18,710 (195)
BULLFROG HEMOGRAM UNDER MANAGEMENT STRESS [PDF]
Ciência e Agrotecnologia, 2015 Stress is one of the major obstacles in frog culture and can be caused by factors such as inappropriate farming systems; inadequate management among other situations. The objective of the present study was to assess the hemogram, erythrogram and leukogram of bullfrogs (L.
Teixeira, Patricia Coelho +5 more
openaire +6 more sources
Pathogenic fungus in feral populations of the invasive North American bullfrog in Argentina [PDF]
, 2017 Nearly a third (32.4%) of the world?s amphibian species are either threatened with extinction or already extinct (1). The chytrid fungus Batrachochytrium dendrobatidis (Bd) (Chytridiomycetes: Ryzophydiales) (2) has been recognized as responsible for mass
Ghirardi, Romina +4 more
core +1 more source
Acta Scientiarum: Biological Sciences, 2013 Evaluation of semen characteristics after hormonal induction of the bullfrog could provide valuable information on the gametes of this species, which may be useful for projects related to artificial fertilization, animal improvement, and cryopreservation.
Marcelo Maia Pereira +5 more
doaj +1 more source
Climate change and American Bullfrog invasion: what could we expect in South America? [PDF]
PLoS ONE, 2011 BACKGROUND: Biological invasion and climate change pose challenges to biodiversity conservation in the 21(st) century. Invasive species modify ecosystem structure and functioning and climatic changes are likely to produce invasive species' range shifts ...
Javier Nori +4 more
doaj +1 more source
Molecules, 2016 Bullfrog oil is a natural product extracted from the Rana catesbeiana Shaw adipose tissue and used in folk medicine for the treatment of several diseases. The aim of this study was to evaluate the extraction process of bullfrog oil, to develop a suitable
Lucas Amaral-Machado +11 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
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Population Responses of Wood Frog (Rana Sylvatica) Tadpoles to Overwintered Bullfrog (Rana Catesbeiana) Tadpoles [PDF]
, 2007 A fundamental goal in ecology is to understand how environmental variation influences the distribution of individuals within a population. In this study, we used laboratory experiments to examine the population responses of sympatric Wood Frog (Rana ...
Mullin, Stephen J., Walston, Leroy J.
core +2 more sources
AMPHIBIAN RESPONSE TO A LARGE-SCALE HABITAT RESTORATION IN THE PRAIRIE POTHOLE REGION [PDF]
, 2016 Over the next half-century, scientists anticipate that nearly one third of the currently recognized 7,450 amphibian species will become extinct. Many organizations have responded to the challenge of conserving amphibian biodiversity, some indirectly ...
Hawkins, Michael J. +4 more
core +2 more sources
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 +3 more
doaj +1 more source
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 +7 more
doaj +1 more source