Differential effects of ruminally protected amino acids on fattening of fallow deer in two culling periods

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00027014%3A_____%2F20%3AN0000022" target="_blank" >RIV/00027014:_____/20:N0000022 - isvavai.cz</a>

Alternative codes found

RIV/60460709:41340/20:82471

Result on the web

<a href="https://www.sciencedirect.com/science/article/pii/S1751731119002325?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S1751731119002325?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1017/S1751731119002325" target="_blank" >10.1017/S1751731119002325</a>

Result language

angličtina

Original language name

Differential effects of ruminally protected amino acids on fattening of fallow deer in two culling periods

Original language description

A well-balanced amino acid profile in the feedstuffs for livestock is essential to support adequate growth. This is well studied for monogastric species but still not well understood for ruminants and especially for the most unconventional species, like cervids. This study investigated the influence of ruminally protected lysine (Lys) and methionine (Met) supplementation during the fattening period, as well as two slaughter seasons (late autumn (LA) v. late winter (LW)), on the growth, carcass traits, body condition and blood plasma metabolites of fallow deer (Dama dama). Forty-five yearlings of fallow deer bucks were allocated into three groups, balanced by weight (40.2 +/- 2.7 kg). The deer were pasture-fed and supplemented with barley, free-choice mineral premix, silage during the winter period, and varying levels of ruminally protected Lys and Met: no amino acids (Control), 9 g/day of Lys, and 9 g/day of Lys plus 3 g/day of Met (Lys+Met). Animals were slaughtered in two separate seasons, LA (six animals per group), and LW (nine animals per group). Animals culled in LA had higher average daily weight gain than LW (P = 0.002), due to the reduced growth during winter typical for seasonal cervids in temperate zone, mediated by the photoperiod. Dressing percentage was significantly higher in LW and in the Lys+Met group (P = 0.002). Body condition score (P = 0.024), kidney fat index (KFI) (P = 0.005), and internal fat (P < 0.001) increased significantly with Lys+Met supplementation. During LW, KFI (P = 0.004) and kidney fat (P = 0.001) were also significantly higher than in LA. Blood creatinine concentration increased significantly for deer receiving Lys (P = 0.002) and Lys+Met (P < 0.001). Also, triglycerides level increased in Lys group (P < 0.001). These findings highlight the effects of Lys and Met supplementation on the growth and internal fat storage for winter survival, suggesting a different use of the supplemented resource according to the season. Also, the observed effects on protein and fat metabolism of fallow deer may influence the production of farmed animals, and offer interesting insights about the physiology of the species.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10613 - Zoology

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2020

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

animal

ISSN

1751-7311

e-ISSN

—

Volume of the periodical

14

Issue of the periodical within the volume

3

Country of publishing house

GB - UNITED KINGDOM

Number of pages

8

Pages from-to

648-655

UT code for WoS article

000513882200023

EID of the result in the Scopus database

2-s2.0-85073630091