The Resource Transgenerational effects of in utero heat stress on reproduction in pigs, by Cathy J. Bernhard

Transgenerational effects of in utero heat stress on reproduction in pigs, by Cathy J. Bernhard

Label
Transgenerational effects of in utero heat stress on reproduction in pigs
Title
Transgenerational effects of in utero heat stress on reproduction in pigs
Statement of responsibility
by Cathy J. Bernhard
Creator
Contributor
Author
Degree supervisor
Subject
Genre
Language
eng
Summary
Seasonal infertility caused by high ambient temperatures and humidity during the summer months can have negative effects on the reproduction of female swine. These conditions may cause heat stress leading to large economic losses for swine producers. The objective of this project was to assess fetal and placental development and the development of gonads in conceptuses whose mother was either subjected to gestational heat stress (GHS; n=16) or gestational thermoneutral (GTN; n=14) conditions during pregnancy or in utero as a developing fetus. Gilts were housed in the Brody Environmental Chambers from weeks 4 to 8 of pregnancy before sacrifice during the 8th week of gestation for the collection of the reproductive tracts and fetal tissues, and a subset of gilts (GHS n=23; GTN n=25) were moved to the University of Missouri Swine Teaching Farm to farrow at approximately day 114 of gestation. No differences were observed between GHS and GTN females at the 8th week of gestation. Similarly, no differences were found between litters born to GHS or GTN females at the University of Missouri Swine Teaching Farm. Female progeny (generation 1; G1) from both GTN and GHS mothers remained on farm and were artificially inseminated at second estrus. During the 8th week of gestation, gilts that came from GTN (GTN-G1; n=55) and GHS (GHSG1; n=50) dams were sacrificed for the collection of the reproductive tracts and fetal tissues. No significant effects of treatment were observed between GHS-G1 and GTN-G1 females, but a sex-specific transgenerational effect on fetal weight was observed. Male fetuses from GHS-G1 females had increased weight, while female fetuses were similar. The conclusion was that heat stress from weeks 4 to 8 of gestation in gilts did not change the growth of the fetus, placenta, ovary or testis at mid-gestation, and in utero heat stress from weeks 4 to 8 of gestation had gender-specific transgenerational (first generation) effects. These results will allow producers to better manage gilts during periods of high ambient temperatures
Cataloging source
MUU
http://library.link/vocab/creatorName
Bernhard, Cathy J
Degree
M.S.
Dissertation note
Thesis
Dissertation year
2017.
Government publication
government publication of a state province territory dependency etc
Granting institution
University of Missouri--Columbia
Illustrations
illustrations
Index
no index present
Literary form
non fiction
Nature of contents
  • dictionaries
  • bibliography
  • theses
http://library.link/vocab/relatedWorkOrContributorDate
  • 1965-
  • 1960-
http://library.link/vocab/relatedWorkOrContributorName
  • Safranski, Timothy Jon
  • Lucy, Matthew C.
Label
Transgenerational effects of in utero heat stress on reproduction in pigs, by Cathy J. Bernhard
Instantiates
Publication
Note
  • Field of study: Animal sciences
  • Drs. Timothy J. Safranski and Matthew C. Lucy, Thesis Advisors
  • Includes vita
Bibliography note
Includes bibliographical references (pages 84-87)
Carrier category
online resource
Carrier category code
  • cr
Carrier MARC source
rdacarrier
Content category
text
Content type code
  • txt
Content type MARC source
rdacontent
Control code
1099281875
Extent
1 online resource (xii, 88 pages)
Form of item
online
Media category
computer
Media MARC source
rdamedia
Media type code
  • c
Other physical details
illustrations
Specific material designation
remote
System control number
(OCoLC)1099281875
Label
Transgenerational effects of in utero heat stress on reproduction in pigs, by Cathy J. Bernhard
Publication
Note
  • Field of study: Animal sciences
  • Drs. Timothy J. Safranski and Matthew C. Lucy, Thesis Advisors
  • Includes vita
Bibliography note
Includes bibliographical references (pages 84-87)
Carrier category
online resource
Carrier category code
  • cr
Carrier MARC source
rdacarrier
Content category
text
Content type code
  • txt
Content type MARC source
rdacontent
Control code
1099281875
Extent
1 online resource (xii, 88 pages)
Form of item
online
Media category
computer
Media MARC source
rdamedia
Media type code
  • c
Other physical details
illustrations
Specific material designation
remote
System control number
(OCoLC)1099281875

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