Body mass index, energy reserves, and tissue composition of cuts of Corriedale lambs

The objective of this work was to identify relationships of the body mass index (BMI) with the body energy reserves and tissue composition of shoulder and leg cuts of Corriedale lambs. Twenty-two sheep with average age of 18 months were used. Linear regressions were determined between the studied characteristics. The mean body mass, body condition score (BCS), and BMI were 49.09±7.8 kg, 2.69±0.81, and 10.66±0.99, respectively. The BMI was correlated with the BCS (r = 0.51) and internal fat (r = 0.81). Multiple linear equations, involving BMI and BCS, yielded correlation coefficients between 0.50 and 0.76, with significant values for all studied characteristics. The body mass index allows estimating the body energy reserves of Corriedale sheep.

Index terms:
Ovis aries; body condition score; body fat; body measurements

Authorship

Pablo Tavares Costa ^**Corresponding author: pablocostta@hotmail.com

Universidade Federal de Pelotas, Faculdade de Agronomia Eliseu Maciel, Departamento de Zootecnia, Campus Universitário, Avenida Eliseu Maciel, s/no, CEP 96010-900 Capão do Leão, RS, Brazil. E-mail: pablocostta@hotmail.comUniversidade Federal de PelotasBrazilCapão do Leão, RS, Brazil Universidade Federal de Pelotas, Faculdade de Agronomia Eliseu Maciel, Departamento de Zootecnia, Campus Universitário, Avenida Eliseu Maciel, s/no, CEP 96010-900 Capão do Leão, RS, Brazil. E-mail: pablocostta@hotmail.com

http://orcid.org/0000-0002-2320-7843

Gilson de Mendonça

Universidade Federal de Pelotas, Faculdade de Agronomia Eliseu Maciel, Instituto de Biologia, Campus Universitário, Avenida Eliseu Maciel, s/no, CEP 96010-900 Capão do Leão, RS, Brazil. E-mail: gilsondemendonca@gmail.comUniversidade Federal de PelotasBrazilCapão do Leão, RS, Brazil Universidade Federal de Pelotas, Faculdade de Agronomia Eliseu Maciel, Instituto de Biologia, Campus Universitário, Avenida Eliseu Maciel, s/no, CEP 96010-900 Capão do Leão, RS, Brazil. E-mail: gilsondemendonca@gmail.com

http://orcid.org/0000-0002-4728-0236

Larissa Picada Brum

Universidade Federal do Pampa, Departamento de Zootecnia, Campus Dom Pedrito, Rua 21 de abril, no 80, CEP 96450-000 Dom Pedrito, RS, Brazil. E-mail: lpbrum@hotmail.comUniversidade Federal do PampaBrazilDom Pedrito, RS, Brazil Universidade Federal do Pampa, Departamento de Zootecnia, Campus Dom Pedrito, Rua 21 de abril, no 80, CEP 96450-000 Dom Pedrito, RS, Brazil. E-mail: lpbrum@hotmail.com

http://orcid.org/0000-0002-9088-3913

Thiago Pereira Vieira

Cooperativa Central Gaúcha Ltda., Rua Marquês do Pombal, no 1.854, CEP 90540-000 Porto Alegre, RS, Brazil. E-mail: thiagopereira@zootecnista.com.brCooperativa Central Gaúcha LtdaBrazilPorto Alegre, RS, Brazil Cooperativa Central Gaúcha Ltda., Rua Marquês do Pombal, no 1.854, CEP 90540-000 Porto Alegre, RS, Brazil. E-mail: thiagopereira@zootecnista.com.br

http://orcid.org/0000-0002-7779-0472

Fernanda Dornelles Feijó

Universidade Federal do Rio Grande do Sul, Departamento de Zootecnia, Faculdade de Agronomia, Rua Bento Gonçalves, no 7.712, CEP 91540-000 Porto Alegre, RS, Brazil. E-mail: feijo.fernanda@gmail.comUniversidade Federal do Rio Grande do SulBrazilPorto Alegre, RS, Brazil Universidade Federal do Rio Grande do Sul, Departamento de Zootecnia, Faculdade de Agronomia, Rua Bento Gonçalves, no 7.712, CEP 91540-000 Porto Alegre, RS, Brazil. E-mail: feijo.fernanda@gmail.com

http://orcid.org/0000-0002-3952-3074

Ricardo Zambarda Vaz

Universidade Federal de Santa Maria, Departamento de Zootecnia e Ciências Biológicas. Campus Palmeira das Missões, Avenida Independência, no 3,751, CEP 98300-000 Palmeira das Missões, RS, Brazil. E-mail: rzvaz@terra.com.brUniversidade Federal de Santa MariaBrazilPalmeira das Missões, RS, Brazil Universidade Federal de Santa Maria, Departamento de Zootecnia e Ciências Biológicas. Campus Palmeira das Missões, Avenida Independência, no 3,751, CEP 98300-000 Palmeira das Missões, RS, Brazil. E-mail: rzvaz@terra.com.br

http://orcid.org/0000-0003-4505-1277

*Corresponding author: pablocostta@hotmail.com

SCIMAGO INSTITUTIONS RANKINGS

Tables | Formulas

Tables (2)
Formulas (15)

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Table 1.
Descriptive analysis of data of Corriedale sheep.

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Table 2.
Regression equations developed for the relationships of body mass index (BMI) and body condition score (BCS) with the constituents of shoulders and legs in Corriedale sheep.

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Table 1. Descriptive analysis of data of Corriedale sheep.

Variable	Description	Mean (± SD)⁽¹⁾	Maximum	Minimum
BMI	Body mass index (kg m^-2)	10.66 (±0.99)	12.42	8.46
BW	Body weight (kg)	49.09 (±7.8)	60.00	31.20
BCS	Body condition score (1-5)	2.69 (±0.81)	4.0	1.0
SW	Shoulder weight (kg)	2.08 (±0.51)	3.01	1.11
SM	Shoulder muscle (kg)	1.07 (±0.27)	1.57	0.72
SF	Shoulder fat (kg)	0.39 (±0.17)	0.72	0.12
SB	Shoulder bone (kg)	0.33 (±0.11)	0.45	0.25
LO	Other shoulder tissues (kg)	0.26 (±0.17)	0.34	0.17
LW	Leg weight (kg)	2.74 (±0.57)	4.4	1.68
LM	Leg muscle (kg)	1.49 (±0.32)	2.28	0.94
LF	Leg fat (kg)	0.44 (±0.15)	0.76	0.13
LB	Leg bones (kg)	0.49 (±0.18)	0.56	0.34
LO	Other leg tissues (kg)	0.29 (±0.21)	0.38	0.21
IF	Internal fat (kg)	2.12 (±0.97)	3.76	0.12

⁽¹⁾
SD, standard deviation.

Table 2. Regression equations developed for the relationships of body mass index (BMI) and body condition score (BCS) with the constituents of shoulders and legs in Corriedale sheep.

Linear regression	R²	p-value
$B C S = - 1.7888 + (0.42 \times B M I)$	0.26	0.0176
$S W = - 0.9433 + (0.2838 \times B M I)$	0.30	0.0103
$S W = - 0.0564 + (0.0753 \times B M I) + (0.4964 \times B C S)$	0.76	<0.0001
$S M = - 0.2453 + (0.1234 \times B M I)$	0.20	0.0403
$S M = 0.2471 + (0.0078 \times B M I) + (0.2753 \times B C S)$	0.70	<0.0001
$S F = - 0.7160 + (0.1034 \times B M I)$	0.34	0.0037
$S F = - 0.5083 + (0.0547 \times B M I) + (0.1161 \times B C S)$	0.60	0.0004
$L W = 0.6706 + (0.1944 \times B M I)$	0.11	0.1350
$L W = 1.5836 + (- 0.02 \times B M I) + (0.5104 \times B C S)$	0.50	0.0022
$L M = 0.2511 + (0.1226 \times B M I)$	0.15	0.0790
$L M = 0.7692 + (0.0009 \times B M I) + (0.2896 \times B C S)$	0.57	0.0007
$L F = - 0.4250 + (0.0948 \times B M I)$	0.28	0.0134
$L F = - 0.1692 + (0.0348 \times B M I) + (0.1430 \times B C S)$	0.60	0.0005
$I F = - 6.8157 + (0.8384 \times B M I)$	0.65	<0.0001
$I F = - 6.1167 + (0.6742 \times B M I) + (0.3907 \times B C S)$	0.72	<0.0001

SW, shoulder weight; SM, shoulder muscle; SF, shoulder fat; LW, leg weight; LM, leg muscle; LF, leg fat; IF, internal fat; and R², determination coefficient.

B C S = - 1.7888 + (0.42 \times B M I)

S W = - 0.9433 + (0.2838 \times B M I)

S W = - 0.0564 + (0.0753 \times B M I) + (0.4964 \times B C S)

S M = - 0.2453 + (0.1234 \times B M I)

S M = 0.2471 + (0.0078 \times B M I) + (0.2753 \times B C S)

S F = - 0.7160 + (0.1034 \times B M I)

S F = - 0.5083 + (0.0547 \times B M I) + (0.1161 \times B C S)

L W = 0.6706 + (0.1944 \times B M I)

L W = 1.5836 + (- 0.02 \times B M I) + (0.5104 \times B C S)

L M = 0.2511 + (0.1226 \times B M I)

L M = 0.7692 + (0.0009 \times B M I) + (0.2896 \times B C S)

L F = - 0.4250 + (0.0948 \times B M I)

L F = - 0.1692 + (0.0348 \times B M I) + (0.1430 \times B C S)

I F = - 6.8157 + (0.8384 \times B M I)

I F = - 6.1167 + (0.6742 \times B M I) + (0.3907 \times B C S)

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Body mass index, energy reserves, and tissue composition of cuts of Corriedale lambs

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[1] *Corresponding author: pablocostta@hotmail.com