نتایج جستجو برای: individual breeders

تعداد نتایج: 446107  

ژورنال: توسعه آبزی پروری 2020

This research was carried out with the aim of analyzing the training needs of trout breeders in Arak city. The statistical population of this study was trout breeders in Markazi province, Arak city (N = 70). Sampling was done using simple random sampling method. Sixty trout farmers were selected in Arak city. The research instrument was a questionnaire which verified its reliability and validit...

K. Nenadović P. Stepanović, S. Dimitrijević T. Ilić

A study was made on the prevalence of some parasitic infections appearing in domestic rabbits obtained from individual breeders in Serbia in order to improve the agricultural production of these animals. Aside from economic reasons (meat production and reproduction) rabbits are bred for the research purposes, and races are kept as household pets. For these reasons, among others, it is imp...

Journal: :iranian j. of fisheries science 0

the maintenance of the endangered caspian brown trout salmo trutta caspius populations in iran depends on its artificial breeding. there is no information on how current hatchery breeding protocol influences effective population size of breeders (ne), which is a critical parameter to maintain genetic diversity in future generations. the current hatchery protocol (chp) was comparatively evaluate...

I Sourinejad, M.R Kalbassi, P Martinez

The maintenance of the endangered Caspian brown trout Salmo trutta caspius populations in Iran depends on its artificial breeding. There is no information on how current hatchery breeding protocol influences effective population size of breeders (Ne), which is a critical parameter to maintain genetic diversity in future generations. The current hatchery protocol (CHP) was comparatively evaluate...

I Sourinejad, M.R Kalbassi , P Martinez ,

The maintenance of the endangered Caspian brown trout Salmo trutta caspius populations in Iran depends on its artificial breeding. There is no information on how current hatchery breeding protocol influences effective population size of breeders (Ne), which is a critical parameter to maintain genetic diversity in future generations. The current hatchery protocol (CHP) was comparatively evaluate...

2017
Stephen C Votier Annette L Fayet Stuart Bearhop Thomas W Bodey Bethany L Clark James Grecian Tim Guilford Keith C Hamer Jana W E Jeglinski Greg Morgan Ewan Wakefield Samantha C Patrick

Individual foraging specializations, where individuals use a small component of the population niche width, are widespread in nature with important ecological and evolutionary implications. In long-lived animals, foraging ability develops with age, but we know little about the ontogeny of individuality in foraging. Here we use precision global positioning system (GPS) loggers to examine how ind...

2016
Z Ibarra-Zatarain E Fatsini S Rey O Chereguini I Martin I Rasines C Alcaraz N Duncan

The aim of this work was to characterize stress coping styles of Senegalese sole (Solea senegalensis) juveniles and breeders and to select an operational behavioural screening test (OBST) that can be used by the aquaculture industry to classify and select between behavioural phenotypes in order to improve production indicators. A total of 61 juveniles and 59 breeders were subjected to five indi...

Journal: :Avian diseases 2007
Niwat Chansiripornchai Wisanu Wanasawaeng Jiroj Sasipreeyajan

Ornithobacteriosis is an infectious disease of avian species that has been reported in almost all countries around the world, except Thailand. The objectives of this study were to determine the seroprevalence of Ornithobacterium rhinotracheale (ORT) and to isolate and identify ORT in broilers and broiler breeders in Thailand. Chicken antibodies had been randomly checked from 17 farms (19 flocks...

Journal: :Ecology 2010
Amélie Lescroël Grant Ballard Viola Toniolo Kerry J Barton Peter R Wilson Philip O'B Lyver David G Ainley

In animal populations, a minority of individuals consistently achieves the highest breeding success and therefore contributes the most recruits to future generations. On average, foraging performance is important in determining breeding success at the population level, but evidence is scarce to show that more successful breeders (better breeders) forage differently than less successful ones (po...

2016
Angelica Garcia Montero Christiane Vole Hynek Burda Erich Pascal Malkemper Susanne Holtze Michaela Morhart Joseph Saragusty Thomas B. Hildebrandt Sabine Begall

Ansell's mole-rats (Fukomys anselli) are subterranean rodents living in families composed of about 20 members with a single breeding pair and their non-breeding offspring. Most of them remain with their parents for their lifetime and help to maintain and defend the natal burrow system, forage, and care for younger siblings. Since incest avoidance is based on individual recognition (and not on s...

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