Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
The effect of oestrous cycle number, at constant age, on gilt reproductionin a dynamic service system
Autore:
Grigoriadis, DF; Edwards, SA; English, PR; Davidson, F;
Indirizzi:
Univ Aberdeen, Dept Agr, Aberdeen AB24 5UA, Scotland Univ Aberdeen Aberdeen Scotland AB24 5UA gr, Aberdeen AB24 5UA, Scotland ScotPig Ltd, Whiterashes AB2 0QU, Aberdeen, Scotland ScotPig Ltd Whiterashes Aberdeen Scotland AB2 0QU 0QU, Aberdeen, Scotland
Titolo Testata:
ANIMAL SCIENCE
, volume: 72, anno: 2001,
parte:, 1
pagine: 11 - 17
SICI:
1357-7298(200102)72:<11:TEOOCN>2.0.ZU;2-G
Fonte:
ISI
Lingua:
ENG
Soggetto:
PREPUBERAL GILTS; 3RD ESTRUS; PERFORMANCE; 1ST; INSEMINATION; EMBRYOS; WEIGHT; PIGS; 2ND;
Keywords:
gilts; litter size; mating; oestrus; sexual behaviour;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
28
Recensione:
Indirizzi per estratti:
Indirizzo: Grigoriadis, DF Univ Aberdeen, Dept Agr, 581 King St, Aberdeen AB24 5UA, Scotland Univ Aberdeen 581 King St Aberdeen Scotland AB24 5UA land
Citazione:
D.F. Grigoriadis et al., "The effect of oestrous cycle number, at constant age, on gilt reproductionin a dynamic service system", ANIM SCI, 72, 2001, pp. 11-17

Abstract

Previous studies examining the effect of age on gilt reproduction have generally failed to discriminate between chronological (i.e. days) and physiological age (i.e. number of oestrous cycles experienced) and the importance of each factor remains unclear in the pig. The present investigation testedthe hypothesis that the physiological age at which gilts are bred in a dynamic service system (DSS) affects their reproductive behavior and performance. A hundred and ninety gilts were randomly allocated between tow treatments. They were introduced int the service pens of a DSS to be bred at the same age (215 days) but either at second (2H; no. = 96) or third (3H; no. = 94) postpubertal heat period. the sexual behaviour of half of them was continuously recorded over a 13-week period and reproductive data from all the gilts were collected. Gilts of 2H treatment were significantly heavier at entry into the service pens (123 v. 119 kg; P<0.05) than 3H gilts, but there was no significant difference in their backfat thickness. Treatment failed to affect the quality and frequency of mating attempts (MAs) gilts receivedor oestrus duration. Conception rate to first oestrus in the DSS (82%) wasnot affected by treatment. Litter size and number of piglets born alive was similar for 3H and 2H gilts (12.0 v 11.7, s.e.d. 0.40 and 11.5 v. 11.0, s.e.d. 0.4 respectively; all P>0.05). It is concluded that the reproductive behaviour and performance of gilts that had experienced either two or threeoestrous cycles prior to mating at a constant age does not differ significantly in a DSS. More studies are needed in order to clarify the possible interactive influence of repeated and frequent services, which are common in a DSS, on gilt reproduction.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 01/04/20 alle ore 20:52:02