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Tropical Animal Health andProduction

ISSN 0049-4747

Trop Anim Health Prod

DOI 10.1007/s11250-011-9956-4

Effect of ruminally protected methionine

on body weight gain and growth of antlers

in red deer (Cervus elaphus) in the humid

tropics

Paula Mendoza-Nazar, Germn David

Mendoza-Martnez, Jos Herrera-Haro,

Benigno Ruiz-Sesma, Ricardo Brcena-Gama & Luis Tarango-Armbula


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BRIEF COMMUNICATION

Effect of ruminally protected methionine on body weight

gain and growth of antlers in red deer (Cervus elaphus)

in the humid tropics

Paula Mendoza-Nazar & Germn David Mendoza-Martnez & Jos Herrera-Haro &

Benigno Ruiz-Sesma & Ricardo Brcena-Gama & Luis Tarango-Armbula

Accepted: 8 August 2011# Springer Science+Business Media B.V. 2011

Abstract Sixteen male red deer (Cervus elaphus), with aninitial weight of 93.83 4.38 kg were used to study the

effect of the dietary level of ruminally protected methionine

(RPM) on growth, antler morphometry and serum metab-

olites. The deer were allowed to graze and were individu-

ally supplemented with concentrate to provide 0, 2.5, 3.5 or

4.5 g/day of RPM for 65 days. There was a quadratic effect

on daily weight gain (0.163, 0.098, 0.147 and 0.172 kg/

day; P


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Materials and methods

The study was conducted from April 20 through June 25,

2007, during the dry season at the Grazing Research Deer

Unit Tantankin of the Fideicomisos Instituidos con Relacin

a la Agricultura, Yucatn State, Mxico, which is located at

1938 and 2009N and 8859 and 8914W, 36 m above

sea level. The climate is warm and subhumid, with summerrains. The average rainfall and temperature are 1,100 mm

and 25.8C, respectively.

Sixteen male red deer (Cervus elaphus) with an initial

weight of 93.834.38 kg and an initial age of 2.8 years

were randomly assigned to four treatments (in groups of

four deer each) to receive a concentrate providing 0, 2.5,

3.5 or 4.5 g/day of RPM (Mepron M85, Degussa-Hlls).

The animals were adapted to the concentrate during a 15-

day period, and the experiment lasted 50 days. The

concentrate was offered in individual feeders at a fixed

amount of 900 g/day (11.9% CP and 3.03.12 Mcal ME/kg

DM) and was compounded with ground corn (77%), canemolasses (10%), soybean meal (10%) and minerals (3%).

The deer were allowed to graze in a 1-ha irrigated sward of

Brachiaria spp. divided into two paddocks.

The data recorded at the beginning and end of the trial

included the antler beam length, the brow tine length and

the number of points, as described by Azorit et al. (2002).

The weight of the deer was also recorded. Samples of

jugular blood were collected with vacuum tubes from all of

the deer at the end of the experiment. The deer were

previously immobilised with 10% xylazine at 1.2 mg/kg

body weight (Clemente et al. 2005). The serum was

separated by centrifugation of clotted blood samples and

refrigerated until analysis. Glucose, cholesterol, urea,

creatinine, serum glutamic pyruvate transaminase (SGPT),

serum glutamic oxaloacetic transaminase (SGOT) and totalproteins (TP) were determined with a spectrophotometer

(Thermospectronic Genesys 20, Madison, WI) using the

procedures described by Coles (1989). The plasma was

analysed for TP by the Biuret method, according to Gornall

et al. (1949).

The data were analysed according to a completely

randomised layout (four deer per treatment). The analysis

used the mixed procedure of SAS (2002) to test the linear

and quadratic effects of the methionine level. Treatment

means were compared using the Tukey test at P


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only blood metabolite that decreased in response to

methionine supplementation (quadratic effect P


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Landete-Castillejos, T., Garca, A., Gallego, L. (2007). Body weight,early growth and antler size influence antler bone mineralcomposition of Iberian red deer (Cervus elaphus hispanicus).

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Vanp, C., Gaillard, J.M., Kjellander, P., Mysterud, A., Magnien, P.,Delorme, D., Van Laere, G., Klein, F., Liberg, O., Hewison, A.J.M. (2007). Antler size provides an honest signal of malephenotypic quality in roe deer. The American Naturalist, 169,481493.

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