Results 121 to 130 of about 70,872 (279)
Genetics and Molecular Biology, 2005 The genetic diversity of 277 nucleotides in the mitochondrial DNA control region (nt 15,964 to 16,240 in reference sequence) was analyzed in crossbreed beef cattle (Brangus-Ibage, 5/8 Bos primigenius taurus x 3/8 Bos primigenius indicus) as well as in ...
Luiz Ernani Henkes +3 more
doaj +1 more source
The Trypanotolerant Livestock Network in West and Central Africa [PDF]
, 2011 Describes the background to the problem of trypanosomiasis in Africa, identifying Bos taurus & Bos indicus types of trypanotolerant breeds & discussing the importance of their use in the exploitation of tsetse-infested areas of Africa.
Murray, M., Trail, J.C.M., Wissocq, Y.J.
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Brazilian Journal of Veterinary Research and Animal Science, 2002 O objetivo deste trabalho foi estudar os efeitos da idade, do grupo genetico e da interacao entre idade e grupo genetico, sobre as biometrias testiculares (circunferencia escrotal e consistencia testicular) Foram avaliados, aos 20 e 24 meses de idade, 190 touros Nelore e 447 touros cruzados Nelore-europeu. Aos 24 meses os exames foram repetidos.
Valentim, Renato +3 more
openaire +3 more sources
Journal of Animal Ecology, EarlyView.For the first time, predation and scavenging networks are directly compared within a single ecosystem. Using an 8‐year dataset of African mammals, including megaherbivores, this study reveals distinct structural rules and body mass constraints, providing a scalable framework for studying consumer–resource dynamics and ecosystem function.
Solange Alexandra Batista‐Nunes +5 more
wiley +1 more source
Revista Brasileira de Parasitologia Veterinária, 2012 Severe infestation with lice was observed on crossbred cattle (Bos taurus indicus ×Bos taurus taurus) in the municipality of São Domingos do Capim, state of Pará, Brazil.
Alessandra Scofield +5 more
doaj +1 more source
Russian wheat aphid: a model for genomic plasticity and a challenge to breeders
Insect Science, EarlyView.Invasive foundress finds suitable habitat and reproduces through pathogenesis. Wingless females produce life offspring quickly, which leads to high population densities. High population densities result in competition, which may induce epigenetic changes and wing development for dispersal.
Astrid Jankielsohn +8 more
wiley +1 more source
Investigation of the effects of weight loss on Ovis aries muscle: a proteomic study on three breeds with different levels of adaptation to nutritional stress [PDF]
, 2011 Tese de mestrado. Biologia (Biologia Celular e Biotecnologia). Universidade de Lisboa, Faculdade de Ciências, 2011Nos trópicos, a produção animal em regime extensivo enfrenta grandes obstáculos, talvez o maior dos quais é a perda de peso sazonal, devida ...
Palhinhas, Rui MIguel Guerreiro, 1988-
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Cardiovascular Plasticity and Adaptation of High‐Altitude Birds and Mammals
Integrative Zoology, EarlyView.This schematic depicts the cardiovascular adaptations of mammals and birds to high‐altitude hypoxia. It highlights key phenotypic changes in oxygen transport and cardiac responses, driven by molecular mechanisms including transcriptional regulation and genetic modifications.
Huishang She, Yanhua Qu
wiley +1 more source
Genetic diversity among bovine racial subpopulations of Costa Rica
Agronomía Costarricense, 2015 Genetic diversity among bovine racial subpopulations of Costa Rica. The objetive of this study was to quantify the genetic diversity among 16 bovine racial subpopulations of Costa Rica, based on 1412 samples of bovine DNA from around the country, which ...
Marco Martínez +4 more
doaj
Integrative Zoology, EarlyView.The transition of cetaceans from a terrestrial to an aquatic environment involved a crucial sensory adaptation to environments with limited visibility. Vibrissae, important mechanoreceptors, undergo an ontogenetic transformation in odontocetes. This research describes the histomorphology of vibrissae and crypts at different developmental stages ...
Cecilia Mariana Krmpotic +10 more
wiley +1 more source