Effect of Testosterone Administration and Spiking on Reproductive Success of Broiler Breeder Flocks

Ordás, Bernardo; Vahedi, Seyed Milad; Seidavi, Alireza; Rahati, Maliheh; Laudadio, Vito; Tufarelli, Vincenzo

doi:10.1111/rda.12595

Cited by 9 publications

(4 citation statements)

References 31 publications

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“…Male fertility declines with age. Restoring male fertility beyond 40 WOA can be achieved by either spiking (exchange of old males by young males) or administration of testosterone to old males (Ordas et al., 2015 ). Injections of testosterone are only feasible for caged males and are stressful.…”

Section: Assessmentmentioning

confidence: 99%

Welfare of broilers on farm

Nielsen¹,

Álvarez²,

Bicout³

et al. 2023

EFS2

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This Scientific Opinion considers the welfare of domestic fowl (Gallus gallus) related to the production of meat (broilers) and includes the keeping of day-old chicks, broiler breeders, and broiler chickens. Currently used husbandry systems in the EU are described. Overall, 19 highly relevant welfare consequences (WCs) were identified based on severity, duration and frequency of occurrence: 'bone lesions', 'cold stress', 'gastro-enteric disorders', 'group stress', 'handling stress', 'heat stress', 'isolation stress', 'inability to perform comfort behaviour', 'inability to perform exploratory or foraging behaviour', 'inability to avoid unwanted sexual behaviour', 'locomotory disorders', 'prolonged hunger', 'prolonged thirst', 'predation stress', 'restriction of movement', 'resting problems', 'sensory under-and overstimulation', 'soft tissue and integument damage' and 'umbilical disorders'. These WCs and their animal-based measures (ABMs) that can identify them are described in detail. A variety of hazards related to the different husbandry systems were identified as well as ABMs for assessing the different WCs. Measures to prevent or correct the hazards and/or mitigate each of the WCs are listed. Recommendations are provided on quantitative or qualitative criteria to answer specific questions on the welfare of broilers and related to genetic selection, temperature, feed and water restriction, use of cages, light, air quality and mutilations in breeders such as beak trimming, de-toeing and comb dubbing. In addition, minimal requirements (e.g. stocking density, group size, nests, provision of litter, perches and platforms, drinkers and feeders, of covered veranda and outdoor range) for an enclosure for keeping broiler chickens (fast-growing, slower-growing and broiler breeders) are recommended. Finally, 'total mortality', 'wounds', 'carcass condemnation' and 'footpad dermatitis' are proposed as indicators for monitoring at slaughter the welfare of broilers on-farm.

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Section: Assessmentmentioning

confidence: 99%

Welfare of broilers on farm

Nielsen¹,

Álvarez²,

Bicout³

et al. 2023

EFS2

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“…Nas criações de aves industriais, algumas formas de se avaliar o desempenho reprodutivo e a qualidade dos reprodutores são números de ovos e pintinhos produzidos, capacidade fecundante dos espermatozoides, sobrevivência dos embriões durante o período de incubação, entre outros (Ordas et al, 2015). Contudo, o envelhecimento exerce efeitos negativos na produção e aptidão das aves, sendo frequentemente correlacionadas com alterações nos padrões hormonais (Avital-Cohen et al, 2013), queda da qualidade do sêmen (Khan et al, 2012), redução de comportamentos sexuais (Mauldin, 1992), aumento do peso corporal e lesões musculoesqueléticas, assim como, queda na produção de ovos (Hocking & Duff, 1989).…”

Section: Fertilidadeunclassified

História, evolução e perspectivas futuras da inseminação artificial em aves domésticas: Revisão de literatura

Almeida

Resende

2023

RSD

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A inseminação artificial (IA) é a biotecnia da reprodução mais utilizada nas espécies de animais domésticos. O uso dessa técnica na reprodução avícola tem possibilitado a rápida disseminação do material genético de machos superiores para um elevado número de fêmeas. Os primeiros estudos com IA em aves iniciaram a mais de um século com Ivanoff, na Rússia, sendo considerado pioneiro, após obter ovos férteis de galinhas usando sêmen coletado do canal deferente de galos. Posteriormente, Burrows e Quinn desenvolveram a técnica de massagem lombo-sacral para a coleta de sêmen, a qual é utilizada até os dias atuais. No entanto, a IA só deslanchou a partir do momento em que as aves passaram dos sistemas de criação extensivo para o intensivo, quando saíram do chão para gaiolas suspensas, principalmente em aves de postura, permitindo maior controle e otimização das inseminações. Mas foi a partir da década de 50 que a IA passou a ser utilizada na avicultura comercial, inicialmente em Israel e na Austrália, seguido por Estados Unidos e por outros países como o Brasil. A viabilidade técnico-econômica da utilização da IA, como método reprodutivo em aves, já está comprovada por diversos trabalhos publicados na literatura nacional e internacional, em diversas espécies. No Brasil, apesar da tecnologia da IA em aves ser pouco difundida, algumas atividades, vem sendo desenvolvidas no campo experimental e na rotina da reprodução avícola de empresas privadas, criadores particulares “hobby” e algumas Universidades, mas com uma aplicação bem aquém daquela realizada para outras espécies.

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“…Prevailing temperature in the tropics is usually too high for productivity in chickens (Abioja et al, 2012). High environmental temperature negatively affects spermatogenesis in both mammalian (Bah, Chaughari, & Al-Amin, 2001;Ordas, Vahedi, Seidavi, & Rahati, 2015;Garcia-Oliveros et al, 2020) and avian species (Karaca, Parker, & McDaniel, 2002;Attia, El-Naggar, Abou-Shehema, & Abdella, 2019) during heat stress (HS). Poor fertility in broiler breeder eggs is mostly related to male birds, even though females may be responsible for the flock fertility decline (Hocking & Bernard, 2000;Habibian, Ghazi, Moeini, & Abdolmohammadi, 2014).…”

Section: Introductionmentioning

confidence: 99%

Semen quality and sperm characteristics in broiler breeder cockerels fed vitamin E during hot season

Abioja

Apuu

Daramola

et al. 2022

Acta Sci. Anim. Sci.

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Thirty-two Arbor Acres (AA) cockerels aged 27 weeks were used to determine the effect of vitamin E (VE) on the semen characteristics and sperm quality during hot season. The birds were fed diets containing 0, 50, 100 and 150mg VE kg-1 feed. There were 4 replicates and two birds per replicate. Semen collection was done thrice a week for three weeks in all birds. Dietary vitamin E significantly (p < 0.05) increased the semen volume (SV) and number of sperm cells (NS) in AA cockerels. CONTROL birds (0.71 mL) had lower SV than birds fed 150 mg VE (0.94 mL). Birds on 100 and 150 mg VE recorded similar NS, which was higher than 0 and 50 mg VE groups. The least NS was in the CONTROL group. Sperm abnormality gradually (p < 0.05) decreased as dietary VE increased from 0 to 150 mg. Significant (p < 0.01) effect of dietary VE was recorded in percentage live sperm (PLS). Semen from cockerels on VE treatment had higher PLS than the CONTROL. In conclusion, it may be beneficial to supplement the broiler breeder cockerel diet with VE up to 150 mg kg-1 feed during hot season as it increased SV, NS and PLS and decreased sperm abnormality.

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Effect of Testosterone Administration and Spiking on Reproductive Success of Broiler Breeder Flocks

Cited by 9 publications

References 31 publications

Welfare of broilers on farm

Welfare of broilers on farm

História, evolução e perspectivas futuras da inseminação artificial em aves domésticas: Revisão de literatura

Semen quality and sperm characteristics in broiler breeder cockerels fed vitamin E during hot season

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