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Administration of a long-acting antiparasitic to pre-pubertal ewe-lambs in Greece results in earlier reproductive activity and improved reproductive performance
dc.creator | Mavrogianni, V. S. | en |
dc.creator | Papadopoulos, E. | en |
dc.creator | Fragkou, I. A. | en |
dc.creator | Gougoulis, D. A. | en |
dc.creator | Valasi, I. | en |
dc.creator | Orfanou, D. C. | en |
dc.creator | Ptochos, S. | en |
dc.creator | Gallidis, E. | en |
dc.creator | Fthenakis, G. C. | en |
dc.date.accessioned | 2015-11-23T10:39:10Z | |
dc.date.available | 2015-11-23T10:39:10Z | |
dc.date.issued | 2011 | |
dc.identifier | 10.1016/j.vetpar.2010.11.045 | |
dc.identifier.issn | 0304-4017 | |
dc.identifier.uri | http://hdl.handle.net/11615/30824 | |
dc.description.abstract | We studied the reproductive effects of administration of a long-acting antiparasitic (moxidectin) given to pre-pubertal ewe-lambs in Greece at the beginning of the reproductive season. 45 animals, naturally infected with trichostrongylids, were allocated into treated (n = 30, treatment on DO, 21 June) or control (n = 15) group. Rams of confirmed fertility, were introduced from 15 August (D55) to 20 December (D182) into the ewe-lambs. Throughout the study (performed at latitude N 36 degrees 26', in a flock free from brucellosis, Chlamydophila infection and toxoplasmosis), epg counts were monitored and reproductive performance of ewes was assessed. Up to D112, arithmetic mean epg counts in treated animals were 0; thereafter and up to D350, they were 23-473. Respective figures for controls were 190-977 epg. Reproductive performance parameters for treated and control animals respectively, were as follows; median 'Interval to first mating after ram introduction': 36.5 d and 71.0 (P = 0.04); median 'Age at first mating': 8.5 m and 10.0 m (P = 0.045); 'Cycling rate': 20.0% and 6.7% (P = 0.03); 'Mating rate': 86.7% and 66.7%; 'Return-to-oestrus rate': 26.7% and 26.7%; 'Abortion rate': 3.3% and 0%; 'Lambing rate': 83.3% and 66.7%; 'Total lambs born per ewe' and liveborn lambs born per ewe': 1.5 and 1.1 (P = 0.01): 'Stillbirth rate' 0% and 0% and 'Lamb bodyweight per ewe': 5.0 kg and 3.8 kg (P = 0.005). Anthelmintic treatment of pre-pubertal ewes, in order to maximise reproductive performance may be employed as a management strategy according to targets set in individual flocks. (C) 2010 Elsevier B.V. All rights reserved. | en |
dc.source | Veterinary Parasitology | en |
dc.source.uri | <Go to ISI>://WOS:000290184400021 | |
dc.subject | Sheep-reproduction | en |
dc.subject | Puberty | en |
dc.subject | Reproductive performance | en |
dc.subject | Parasitism | en |
dc.subject | Anthelmintic | en |
dc.subject | Moxidectin | en |
dc.subject | OSTERTAGIA-CIRCUMCINCTA | en |
dc.subject | SMALL RUMINANTS | en |
dc.subject | OVULATION RATE | en |
dc.subject | GROWING LAMBS | en |
dc.subject | NUTRITION | en |
dc.subject | SHEEP | en |
dc.subject | CHALLENGE | en |
dc.subject | QUALITY | en |
dc.subject | GROWTH | en |
dc.subject | LARVAE | en |
dc.subject | Parasitology | en |
dc.subject | Veterinary Sciences | en |
dc.title | Administration of a long-acting antiparasitic to pre-pubertal ewe-lambs in Greece results in earlier reproductive activity and improved reproductive performance | en |
dc.type | journalArticle | en |
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