J. Anim Sci.
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

This Article
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Booth, P. J.
Right arrow Articles by Foxcroft, G. R.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Booth, P. J.
Right arrow Articles by Foxcroft, G. R.

Journal of Animal Science, Vol 72, Issue 9 2415-2424, Copyright © 1994 by American Society of Animal Science

JOURNAL ARTICLE

Nutritional manipulation of growth and metabolic and reproductive status in prepubertal gilts

P. J. Booth, J. Craigon and G. R. Foxcroft
AFRC Research Group on Hormones and Farm Animal Reproduction, University of Nottingham Faculty of Agricultural and Food Sciences, Sutton Bonington, Loughborough, Leics, U.K.

Reproductive status, metabolic state, and carcass composition were compared in prepubertal littermate gilts of 85 kg BW and identical ages after allocation to one of two feeding regimens at 75 kg, either twice-daily feeding to appetite up to 85 kg and then maintenance feeding until slaughter (Group 85AR) or an initial period of maintenance feeding at 75 kg and then feeding to appetite to reach 85 kg (Group 85RA). Other littermates were studied at the start of treatment (Group 75C) and after the initial period of feeding to appetite (Group 85A) or maintenance feeding (Group 75R). In the absence of differences in backfat depth or longissimus muscle area, Group 85RA gilts showed increased follicular development (P < .001) compared with their feed-restricted Group 85AR littermates. Plasma LH (P < .001) and FSH (P < .02) responses to an LHRH challenge differed between these same groups. Feed restriction reduced preprandial glucose, postprandial cortisol, and insulin (P < .05), total plasma IGF-I, and basal and postprandial free triiodothyronine (T3; all P < .001) at all stages of the experiment. Postprandial insulin, pre- (P < .001) and postprandial free T3, and plasma IGF-I (P < .001) increased in response to refeeding (Group 75R vs 85RA). These data indicate that changes in metabolic status can mediate short-term nutritional effects on reproductive function, in the absence of changes in age, weight, and widely used indices of body composition, and also establish the short-term, feed-restricted, prepubertal gilt as an effective model for studying the mechanisms mediating nutrition-reproduction interactions.


This article has been cited by other articles:


Home page
 ReproductionHome page
S. Aquila, V. Rago, C. Guido, I. Casaburi, S. Zupo, and A. Carpino
Leptin and leptin receptor in pig spermatozoa: evidence of their involvement in sperm capacitation and survival
Reproduction, July 1, 2008; 136(1): 23 - 32.
[Abstract] [Full Text] [PDF]

Home page
 Am. J. Physiol. Regul. Integr. Comp. Physiol.Home page
G. N. Wade and J. E. Jones
Neuroendocrinology of nutritional infertility
Am J Physiol Regulatory Integrative Comp Physiol, December 1, 2004; 287(6): R1277 - R1296.
[Abstract] [Full Text] [PDF]


HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
Copyright © 1994 by the American Society of Animal Science.