Endoparasite and nutritional status of Suffolk lambs in seven production systems
Jordana Andrioli Salgado A , Marcelo Beltrão Molento B C , Cristina Santos Sotomaior D , Laila Talarico Dias E , Luciana Laitano Dias de Castro F , Laura Derenevicz Faisca G and Alda Lúcia Gomes Monteiro H I
+ Author Affiliations
- Author Affiliations
A Doctor in Biosciences and Biotechnology, North Fluminense State University, Darcy Ribeiro, UENF, 28013-602, Campos dos Goytacazes (RJ), Brazil.
B Associate Professor, Department of Veterinary Medicine, Federal University of Paraná, UFPR, 80035-050, Curitiba (PR), Brazil.
C National Institute of Science and Technology, INCT/Livestock, Brazil.
D Professor, Catholic University of Paraná, PUC-PR, 80215-901, Curitiba (PR), Brazil.
E Associate Professor, Department of Animal Science, Federal University of Paraná, UFPR, 80035-050, Curitiba (PR), Brazil.
F Doctorate student in Veterinary Science, Federal University of Paraná, UFPR, Brazil.
G MSc Student, Agronomical Sci., Federal University of Paraná, UFPR, Brazil.
H Associate Professor, Sheep and Goat Production and Research Center, Department of Animal Science, Federal University of Paraná, UFPR, 80035-050, Curitiba (PR), Brazil.
I Corresponding author. Email: aldaufpr@gmail.com
Animal Production Science 58(9) 1667-1676 https://doi.org/10.1071/AN16437
Submitted: 13 July 2016 Accepted: 23 March 2017 Published: 29 May 2017
Abstract
Lambs are the most susceptible category for parasite infections; therefore, the choice of the production system can influence nutritional status and reduce parasite infections. The present study aimed to evaluate the endoparasites and nutritional status of meat lambs in seven production systems. In the feedlot, they were (S1) early weaned lambs in feedlot and (S2) unweaned lambs in feedlot with controlled suckling. On pasture, they were (S3) early weaned lambs on pasture without supplementation, (S4) early weaned lambs on pasture with concentrate supplementation post-weaning, (S5) unweaned and unsupplemented lambs on pasture, (S6) unweaned lambs on pasture with concentrate supplementation and creep-feeding and (S7) unweaned lambs on pasture with free access to creep-grazing on white clover (Trifolium repens). Suffolk lambs (n = 132) were evaluated from 45 to 101 days of age, at 14-day intervals (0, 14, 28, 42 and 56 days). Parasite faecal egg count (FEC), FAMACHA score (FMC), average daily weight-gain and body condition score (BCS) were evaluated. The animals were treated with anthelmintics when they had FMC 3, 4 or 5 and/or FEC above 700. BCS and FEC (r = –0.361) and BCS and FMC variables (r = –0.313) were negatively correlated (P ≤ 0.01). FEC was lower in feedlot and in creep-feeding animals than in the other systems after the second evaluation (28 days). The weaned feedlot-lamb and controlled-suckling systems presented the best performance. On pasture, the animals in creep-feeding and creep-grazing had the best performance. Weaned and unsupplemented lambs on pasture had the lowest daily weight-gain (63 g/day) and the highest FMC scores (43% of animals) and the lowest BCS (mean 1.5). The endoparasite and nutritional statuses of the lambs were strongly correlated and were influenced by the production system, mainly when the ewes were present and the lambs received supplementation on pasture.
Additional keywords: breeding, gastrointestinal nematodes, sheep, supplementation, weaning.
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