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Endocrine causes of seasonal and lactational anestrus in farm animals

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252 pages
Proceedings of a seminar held at Mariensee (D) on 2-3 October 1984
Medical and biological research
Veterinary sector and animal health
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F. ELLENDORFF/F. ELSAESSER
(EDITORS)
ENDOCRINE CAUSES OF
SEASONAL AND LACTATIONAL
ANESTRUS IN FARM ANIMALS ENDOCRINE CAUSES OF SEASONAL AND LACTATIONAL ANESTRUS
IN FARM ANIMALS CURRENT TOPICS IN VETERINARY MEDICINE AND ANIMAL SCIENCE
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tion, edited by J.W.B. King and F. Menissier ENDOCRINE CAUSES
OF SEASONAL AND
LACTATIONAL ANESTRUS
IN FARM ANIMALS
A Seminar in the CEC Programme of Co-ordination of Research
on Livestock Productivity and Management, held at the Institut
fur Tierzucht und Tierverhalten, Mariensee,
Bundesforschungsanstalt fur Landwirtschaft (FAL),
October 2-3, 1984
Sponsored by the Commission of the European Communities,
Directorate-General for Agriculture, Co-ordination of Agricultural
Research
Edited by
F. Ellendorff, F. Elsaesser
Institut fur Tierzucht und Tierverhalten, Mariensee
Federal Republic of Germany
1985 MARTINUS NIJHOFF PUBLISHERS WJ
a member of the KLUWER ACADEMICS GROUP BB
DORDRECHT / BOSTON / LANCASTER *^
for
THE COMMISSION OF THE EUROPEAN COMMUNITIES
CL Distributors
for the United States and Canada: Kluwer Academic Publishers, 190 Old Derby
Street, Hingham, MA 02043, USA
for the UK and Ireland: Kluwer Academic Publishers, MTP Press Limited,
Falcon House, Queen Square, Lancaster LAI 1RN, UK
for all other countries: Kluwer Academic Publishers Group, Distribution Center,
P.O. Box 322, 3300 AH Dordrecht, The Netherlands
Library of Congress Cataloging in Publication Data
Main entry under title:
Endocrine causes of seasonal and lactational anestrus
in farm animals.
(Current topics in veterinary medicine and animal
sc ience)
1. Anestrus—Congresses. 2. Veterinary
endocrinology—Congresses. 1. Ellendorff, F.
II. Elsaesser, F. III. C.E.C. Programme of Coordination
of Research on Livestock Productivity and Management.
IV. Commission of the European Communities.n
of Agricultural Research. V. Series.
SF768.3.E54 1985 636.089'8172 85-10646
ISBN 0-89838-738-8
ISBN8
EUR 9554 EN
Book information
Publication arranged by: Commission of the European Communities, Direc­
torate-General Information Market and Innovation, Luxembourg
Copyright/legal notice
© 1985 by ECSC, EEC, EAEC, Brussels-Luxembourg.
All rights reserved. No part of this publication may be reproduced, stored in a
retrieval system, or transmitted in any form or by any means, mechanical,
photocopying, recording, or otherwise, without prior written permission of the
publishers,
Martinus Nijhoff Publishers, P.O. Box 163, 3300 AD Dordrecht,
The Netherlands.
Neither the Commission of the European Communities nor any person acting on
behalf of then is responsible for the use which might be made of the
following information.
PRINTED IN THE NETHERLANDS CONTENTS Page
PREFACE 1
SESSION I: SEASONAL ANESTRUS IN THE EWE
SEASONAL ANESTRUS - PROBLEMS AND PERSPECTIVES 3
G.E. Lamming
ENDOCRINE BASIS OF SEASONAL ANESTRUS IN SHEEP 6
W. Haresign, B.J. McLeod, G.M. Webster, K. Worthy
GENETICS AND PHYSIOLOGY OF FOLLICLE RECRUITMENT 19
AND MATURATION DURING SEASONAL ANESTRUS
R. Webb, I.K. Gauld
BREED DIFFERENCES IN THE BREEDING SEASON IN SHEEP 2
J.F. Quirke, J.P. Hanrahan
LIGHT CONTROL OF REPRODUCTION IN THE EWE 44
J. Thimmonier, R. Ortavant
EFFECTS OF MELATONIN ON THE TIME OF ONSET OF THE 55
BREEDING SEASON IN DIFFERENT BREEDS OF SHEEP
J.F. Roche, J.P. Hanrahan, J.F. Quirke, E. Ronayne
INDUCTION OF OVULATION IN ANESTROUS EWES 66
USING GONADOTROPHINS
A.A. McNeilly, J.M. Wallace and D.T. Baird
INDUCED BREEDING IN ANESTROUS MILKING EWES OF DAIRY 7
BREEDS: COMPARISON OF NORGESTOMET, MEDROXYPROGESTERONE
AND FLUOROGESTONE IN TWO REGIMES OF PMSG
T. AliFakiotis
DISCUSSION 83
SESSION II: SEASONAL ANESTRUS IN THE SOW AND MARE
STIMULATION OF OVARIAN ACTIVITY IN THE PONY MARE 85
DURING WINTER ANESTRUS
B. Bour, E. Palmer, M.A. Driancourt
PRACTICAL CONTROL OF ANESTRUS IN THOROUGHBRED 98
BROODMARES
W.A. Allen
SEASONAL ANESTRUS IN WILD SOWS 10
R. Mauget
PHOTOPERIOD AND FERTILITY IN THE PIG 119
C. Claus, U. Weiler, R. Hahn
DISCUSSION 131 VI
Page
SESSION III: LACTATIONAL ANESTRUS IN THE PIG
HYPOTHALAMIC-PITUITARY-OVARIAN RESPONSES TO WEANING - 133
RETROSPECTIVE EVIDENCE EOR THE CAUSE OF LACTATIONAL
ANESTRUS?
G.R. Foxcroft
ENDOCRINE INTERACTIONS DURING LACTATIONAL 145
ANESTRUS IN SOWS
F. Ellendorff, F. Elsaesser, N. Parvizi,
D. Smidt
RELEVANCE OF PROLACTIN TO LACTATIONAL AND POST- 154
WEANING ANESTRUS IN THE SOWS
D.F.M. van de Wiel, P. Booman, A.H. Willemse and
M.M. Bevers
EFFECTS OF BROMOCRIPTINE TREATMENT DURING 165
LACTATIONAL ANESTRUS IN PIGS
E. Mattioli, E. Seren
DISCUSSION 179
SESSION IV: POST PARTUM ANESTRUS
POST PARTUM ANESTRUS, PROBLEMS AND PERSPECTIVES 181
H. Karg
COMPARATIVE ASPECTS OF THE POSTPARTUM PERIOD IN6
DOMESTIC ANIMALS
M. Vandeplassche
REPRODUCTIVE POTENTIAL DURING THE POST PARTUM 19
PERIOD IN COWS
M. Terqui
ENDOCRINE MECHANISMS CONTRIBUTING TO POST PARTUM 206
ANESTRUS IN DAIRY AND BEEF CATTLE
E. Schallenberger, D.L. Walters
STUDIES ON THE ENDOCRINE AND ENVIRONMENTAL FACTORS 221
INFLUENCING POST PARTUM ACYCLICITY IN DAIRY COWS
BASED ON PROGESTERONE PROFILES
J. Henriksen, A. Mikel Jensen
DISCUSSION 233
GENERAL CONCLUSIONS4
LIST OF PARTICIPANTS6

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