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Mostrando ítems 1-10 de 2021
Phenotypic plasticity of composite beef cattle performance using reaction norms model with unknown covariate
(2013-02-01)
The objective of the present study was to determine the presence of genotype by environment interaction (G × E) and to characterize the phenotypic plasticity of birth weight (BW), weaning weight (WW), postweaning weight ...
Ticks (Acari: Ixodidae) on Wild Marsh-Deer (Blastocerus dichotomus) from Southeast Brazil: Infestations before and after Habitat Loss
(2003-05-01)
The lake from Porto-Primavera hydroelectric power station inundated an area of 2,200 km2 at the border of São Paulo and Mato-Grosso do Sul States, Brazil. Infestations by ticks were evaluated on 135 marsh deer, Blastocerus ...
Laboratory animals and respiratory allergies: The prevalence of allergies among laboratory animal workers and the need for prophylaxis
(Hospital Clinicas, Univ Sao PauloSao PauloBrasil, 2013)
Genotype x environment interaction for age at first calving in Brazilian and Colombian Holsteins
(2004-08-01)
The objective was to determine whether there is a genotype x environment interaction for age at first calving (AFC) in Holstein cattle in Brazil and Colombia. Data included 51,239 and 25,569 first-lactation records from ...
Computer-Vision-Based Indexes for Analyzing Broiler Response to Rearing Environment: A Proof of Concept
(2022-04-01)
Computer-vision systems for herd detection and monitoring are increasingly present in precision livestock. This technology provides insights into how environmental variations affect the group’s movement pattern. We hypothesize ...
Repeatability and heritability of response to superovulation in Holstein cows
(1999-04-15)
The objective of this study was to estimate the relative effects of genetic and phenotypic factors on the efficacy and efficiency of superovulation for Holstein-Friesian cows reared in Brazil. A database, established by ...
Ações de vigilância continuada, papel do cão como animal sentinela para toxoplasmose.
(2008-09-01)
Toxoplasmosis is a worldwide zoonosis caused by Toxoplasma gondii and its definitive host is the domestic and wild felids infecting human beings and other warmblooded animals. Dogs are considered a potential risk on the ...
A place preference test in the fish Nile tilapia
(2006-12-12)
The Nile tilapia fish (Oreochromis niloticus) has a high potential to be used as a model in neuroscience studies. In the present study, the preference of the Nile tilapia between a gravel-enriched (GEE), a shelter-enriched ...
Living with low environmental complexity increases fear indicators in Nile tilapia
(2021-04-01)
Animals are often kept in conditions with low environmental complexity and for long periods in barren artificial environments. This has been shown to lead to poor welfare in many species of animals. We assessed the emotional ...
Environmental enrichment techniques and tryptophan supplementation used to improve the quality of life and animal welfare of Nile tilapia
(2020-07-01)
The adoption of high standards of animal welfare improves the quality of life for animals being reared and produces improved end products for consumers. In this study, we investigate the role of environmental enrichment ...