Combined effects of supplementation of amino acids and immunocastration in first antler growth of farmed fallow deer (Dama dama) DOI
Francisco Ceacero, Veit Ny, Radim Kotrba

et al.

Animal Production Science, Journal Year: 2023, Volume and Issue: 63(16), P. 1583 - 1593

Published: Jan. 8, 2023

Context Amino acid supplementation and immunocastration are two husbandry practices with an increasing interest in the worldwide growing industry of deer farming. acids (AAs) optimise nutrition feed costs improve quality products such as venison, velvet or antlers. Immunocastration (IC) reduces agonistic behaviours, which produce carcass damage reduced growth. Thus, both treatments have positive effects on body growth, but may interfere hormonal regulation, subsequently affecting antler Aims This study aimed to evaluate combined use their impact Methods Forty-four yearling male fallow deer, approximate 10 months old, were subjected following four combinations based treatments: control–control, AA–control, IC–control, AA–IC. treatment started March 2020 was repeated after 50 130 days. All groups received 250 g per animal day grains, those under AA ruminally protected lysine 6.3 methionine 2.1 day. Biometric data, antlers metatarsus collected at slaughter November. Antlers analysed through computer-tomography scanning mineral spectrometry. Key results Supplementation AAs scarcely affected although indirect effect improved condition cannot be rejected. showed significant not dramatic effects: IC animals had lighter antlers, a lower amount cortical bone less mineralisation (density calcium phosphorus concentrations) base than did control animals. In contrast, scarce top metatarsus. Conclusions The suggest reduction total suppression testosterone, almost negligible growth internal bones, thus raising welfare issues. Implications Both techniques can used simultaneously farming, especially farms venison-production goals. Future research should focus optimising vaccination schedule for main farmed species ensure that benefits well balanced productivity.

Language: Английский

GnRH-immunocastration: an alternative method for male animal surgical castration DOI Creative Commons
Chun Wang,

Cuiting Yang,

Yutian Zeng

et al.

Frontiers in Veterinary Science, Journal Year: 2023, Volume and Issue: 10

Published: Oct. 31, 2023

Castration of male animals is intended to produce high-enhance quality animal meat, prevent unpleasant taste, reduce aggressive behavior, and manage overbreeding. Over the years, Tranditional methods mechanical surgical castration have been employed over but they fall short meeting welfare requirements due associated risk infection, pain, stress. Immunocastration, specifically Gonadotropin-releasing hormone (GnRH)-immunocastration, targeting hypothalamic–pituitary-testis (HPT) axis, has emerged as an animal-friendly alternative castration, effectively addressing these issues. This review seeks systematically summarize principles, development, current applications challenges GnRH-immunocastration, offering insights into its role in promoting welfare.

Language: Английский

Citations

9
Contraceptive effect of a gonadotropin‐releasing hormone vaccine on captive male brown bears (Ursus arctos) DOI
Naoya Matsumoto, Jumpei Tomiyasu,

Kyogo Hagino

et al.

Reproduction in Domestic Animals, Journal Year: 2024, Volume and Issue: 59(9)

Published: Aug. 28, 2024

Abstract Fertility control has traditionally been applied in zoos to captive populations, and reversible contraception is important. However, contraceptive methods for male bears have not reported. We aimed establish a brown by investigating the effects of gonadotropin‐releasing hormone (GnRH) vaccine (Improvac®) that was developed immune castration pigs. vaccinated six with two sequential doses 400 ( n = 2) or 600 μg Improvac® 4) 1‐month interval during pre‐breeding season (February April). compared reproductive parameters (testosterone levels semen parameters) four non‐vaccinated (control) once breeding (May June). To investigate whether performance could be restored following year contraception, we also between GnRH vaccination without vaccination. Vaccination treatments suppressed 5 bears, although effective one bear. Testosterone rate progressive sperm motility were significantly lower, total count testis size tended lower controls. Blood biochemical findings direct observations after did reveal side effects. Moreover, testosterone spermatogenic scores year. confirmed elicited effect bears.

Language: Английский

Citations

1
Combined effects of supplementation of amino acids and immunocastration in first antler growth of farmed fallow deer (Dama dama) DOI
Francisco Ceacero, Veit Ny, Radim Kotrba

et al.

Animal Production Science, Journal Year: 2023, Volume and Issue: 63(16), P. 1583 - 1593

Published: Jan. 8, 2023

Context Amino acid supplementation and immunocastration are two husbandry practices with an increasing interest in the worldwide growing industry of deer farming. acids (AAs) optimise nutrition feed costs improve quality products such as venison, velvet or antlers. Immunocastration (IC) reduces agonistic behaviours, which produce carcass damage reduced growth. Thus, both treatments have positive effects on body growth, but may interfere hormonal regulation, subsequently affecting antler Aims This study aimed to evaluate combined use their impact Methods Forty-four yearling male fallow deer, approximate 10 months old, were subjected following four combinations based treatments: control–control, AA–control, IC–control, AA–IC. treatment started March 2020 was repeated after 50 130 days. All groups received 250 g per animal day grains, those under AA ruminally protected lysine 6.3 methionine 2.1 day. Biometric data, antlers metatarsus collected at slaughter November. Antlers analysed through computer-tomography scanning mineral spectrometry. Key results Supplementation AAs scarcely affected although indirect effect improved condition cannot be rejected. showed significant not dramatic effects: IC animals had lighter antlers, a lower amount cortical bone less mineralisation (density calcium phosphorus concentrations) base than did control animals. In contrast, scarce top metatarsus. Conclusions The suggest reduction total suppression testosterone, almost negligible growth internal bones, thus raising welfare issues. Implications Both techniques can used simultaneously farming, especially farms venison-production goals. Future research should focus optimising vaccination schedule for main farmed species ensure that benefits well balanced productivity.

Language: Английский

Citations

2