نتایج جستجو برای: individual breeders

تعداد نتایج: 446107  

2007
Zhivko Duchev Eildert Groeneveld

RapidAPIIS is free software developed in the APIIS framework for setting up integrated databases of individual animal records. It is intended for scientists, students and breeders in the animal agriculture with no programming experience. The user can choose from variety of templates for various species and customize them by including the traits recorded within her/his their organization. Thus, ...

Journal: :Brazilian journal of biology = Revista brasleira de biologia 2012
V V Kuhnen J O Remor R E M Lima

The wildlife trade is becoming increasingly more relevant in discussions concerning conservation biology and the sustainable management of natural resources. The aim of this study was to document the trade and breeding of wildlife in Santa Catarina state, in southern Brazil. Data was collected from annual reports (1996-2008) of wildlife breeders which were sent to IBAMA. By the end of 2008, the...

Journal: :Poultry science 2013
D Yuan L Zheng X Y Guo Y X Wang X A Zhan

An 8-wk experiment using 180 Lingnan Yellow broiler breeders was conducted to investigate the effect of different sources of Se on the concentration and gene expression of selenoprotein P (SEPP1) in broiler breeders and their offspring. After receiving a low-Se basal diet for 8 wk, broiler breeders were randomly allocated to 3 treatments (6 replicates per treatment) and fed corn-soy-based diets...

2016
Penn Lloyd Thomas E. Martin Andrew Taylor Anne Braae Res Altwegg

Among cooperatively breeding species, helpers are hypothesised to increase the survival of breeders by reducingbreederworkload inoffspring care and increasedgroupvigilance against predators. Furthermore, parental nepotism or other benefits of group living may provide a survival benefit to young that delay dispersal to help. We tested these hypotheses in the Karoo Scrub-robin (Cercotrichas coryp...

Journal: :Hormones and behavior 2001
M Z Khan F M McNabb J R Walters P J Sharp

We examined the proximate causes of delayed breeding and alloparental behavior in the cooperatively breeding red-cockaded woodpecker by measuring plasma concentrations of testosterone (T) and prolactin (PRL) in female breeders, male breeders, and male helpers during different stages of the reproductive cycle. Male breeders and helpers have low T during the prebreeding period, highest T during c...

Journal: :Animal behaviour 1997
Schaffner French

In many cooperatively breeding birds and mammals, group size is positively correlated with reproductive success. In marmoset and tamarin monkeys, species that display cooperative breeding, the presence of helpers appears to be critical for offspring survival, and breeders might be expected to display social strategies that would regulate group size. This study investigated the association betwe...

Journal: :Occupational and environmental medicine 2003
K Radon C Winter

BACKGROUND The European Farmers' Study has indicated that sheep farmers might be at risk for the development of respiratory symptoms. AIMS To assess the prevalence of respiratory symptoms in sheep breeders and potential work related risk factors. METHODS All sheep breeders listed in two regions of South Germany were asked to answer a mailed questionnaire on respiratory symptoms, work relate...

1980
Konstantinos Koutoulis Konstantinos C. Koutoulis

The objective of this study was to describe two clinical cases of toxicosis by accidental administration of salinomycin in feed in broiler breeders and turkeys. In the first clinical case, a 32000 broiler breeders flock, 30 weeks of age, suffered a severe mortality during the first week, a sharp decrease in egg production and a dramatic reduction in food consumption together with an increase of...

Journal: :Biology letters 2010
Travis E Wilcoxen Raoul K Boughton Stephan J Schoech

Opportunities to investigate selection in free-living species during a naturally occurring epidemic are rare; however, we assessed innate immunocompetence in Florida scrub-jays before the population suffered the greatest over-winter mortality in 20 years of study. Propitiously, three months prior to the epidemic, we had sampled a number of male breeders to evaluate a suite of physiological meas...

2012
Annett Heise

Artificial insemination (AI) is widely used by veterinarians and veterinary specialists in most domestic as well as wild animal species. Reasons for use of AI instead of natural matings are diverse and different for individual species. As in humans, AI can be used as a tool to increase conception rate in animals that have fertility problems. This is usually performed in companion animals, like ...

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