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Aberrant estrous cycles in goats (Capra hircus) / by Jureerat Eiamvitayakorn.

By:

Eiamvitayakorn, Jureerat [author]

Contributor(s):

Rigor, Ernesto M [adviser]

Material type: Text

TextLanguage: English Publication details: Los Ba�os, Laguna, 1986. Cavite State University- Main Campus,Description: 48 pages : illustrations ; 28 cmContent type:

text

Media type:

unmediated

Carrier type:

volume

Subject(s):

DDC classification:

636.39 Ei1 1986

Online resources:

Click here to view thesis abstract and table of contents

Production credits:

College of Agriculture, Food, Environment and Natural Resources (CAFENR)

Abstract: JUREERAT EIAMVITAYAKORN. University of the Philippines at Los Banos, College, Laguna. December, 1986. Aberrant Estrous Cycles in Goats (Capra hircus). Major Professor: Dr. Ernesto M. Rigor Aberrant estrous cycles have been reported in goats. This study was conducted to determine the ovarian structures present in short and long cycles. Laparotomy was conducted on does that exhibited estrus approximately 60 hours after onset. Those that did not exhibit estrus were approximately 30 days after the last heat. Of the 30 does used for the experiment, 26 were cycling and 4 were non-cycling. Twenty 22.2%) out of 90 cycles observed were short cycles with a mean length of 7.0 + 0.7 and a range of 4-16 days, Fifty eight (64.4%) were normal: cycles with a mean length of 20.6 + 0.4 days and a range of 18-25 days. :twelve (13.3%) were long with a mean length of 45.4 + 0.5 days and range of 31-79 days. The overall mean for all cycles was 21.1 + 1.3 fays with a range of 4-79 days. Mean estrous duration of all observe was 1.6 + 081 days, 1.6 + 0.2 days for short cycles, 1,7 + 0.2 for n a1 and 1.4 + 0.4 days for long cycles. The mean numbers of ovulations -- short, normal and long cycles were 1.5 + 0.1, 1.6 + 0.2 and 1.1 + respective. Xy, and the number of silent ovulations had a mean of + 0.4. The overall mean was 1.4 + 0.1. There was a mean of 11.5 + 1 2 4 5 follicles present in short cycles, 10.8 + 3.3 for normal, 12.7 + for long cycles and 15.2 + 0.5 in silent ovulations. The overall mean was 12.2 + 0.9 follicles. Five does (41.6%) that exhibited long cycles had silent estrus in between; 5 (51.6%) were true long cycles and2 (16.8%) had slow regression of the corpus luteum. All short and normal cycles were accompanied by ovulation. Nine out of 10 long cycles had ovulation, one doe had cystic follicles (0 > 1.0 cm). Results showed that there was a high incidence of aberrant estrous cycles both short and long accompanied by ovulation. The implication on fertility of does with aberrant estrous cycles is discussed.

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Holdings ( 1 )
Title notes ( 5 )

Holdings
Item type	Current library	Collection	Call number	Materials specified	URL	Status	Notes	Date due	Barcode
Theses / Manuscripts	Ladislao N. Diwa Memorial Library Theses Section	Non-fiction	636.39 Ei1 1986 (Browse shelf(Opens below))		Link to resource	Room use only	T-1327		00006193

Thesis (M.S.--Animal Science) University of the Philippines

Includes bibliographical references.

College of Agriculture, Food, Environment and Natural Resources (CAFENR)

JUREERAT EIAMVITAYAKORN. University of the Philippines at Los Banos, College, Laguna. December, 1986. Aberrant Estrous Cycles in Goats (Capra hircus). Major Professor: Dr. Ernesto M. Rigor
Aberrant estrous cycles have been reported in goats. This study was conducted to determine the ovarian structures present in short and long cycles. Laparotomy was conducted on does that exhibited estrus approximately 60 hours after onset. Those that did not exhibit estrus were approximately 30 days after the last heat. Of the 30 does used for the experiment, 26 were cycling and 4 were non-cycling. Twenty 22.2%) out of 90 cycles observed were short cycles with a mean length of 7.0 + 0.7 and a range of 4-16 days, Fifty eight (64.4%) were normal: cycles with a mean length of 20.6 + 0.4 days and a range of 18-25 days. :twelve (13.3%) were long with a mean length of 45.4 + 0.5 days and range of 31-79 days. The overall mean for all cycles was 21.1 + 1.3 fays with a range of 4-79 days. Mean estrous duration of all observe was 1.6 + 081 days, 1.6 + 0.2 days for short cycles, 1,7 + 0.2 for n a1 and 1.4 + 0.4 days for long cycles. The mean numbers of ovulations -- short, normal and long cycles were 1.5 + 0.1, 1.6 + 0.2 and 1.1 + respective. Xy, and the number of silent ovulations had a mean of + 0.4. The overall mean was 1.4 + 0.1. There was a mean of 11.5 + 1 2 4 5 follicles present in short cycles, 10.8 + 3.3 for normal, 12.7 + for long cycles and 15.2 + 0.5 in silent ovulations. The overall mean was 12.2 + 0.9 follicles. Five does (41.6%) that exhibited long cycles had silent estrus in between; 5 (51.6%) were true long cycles and2 (16.8%) had slow regression of the corpus luteum. All short and normal cycles were accompanied by ovulation. Nine out of 10 long cycles had ovulation, one doe had cystic follicles (0 > 1.0 cm). Results showed that there was a high incidence of aberrant estrous cycles both short and long accompanied by ovulation. The implication on fertility of does with aberrant estrous cycles is discussed.

Submitted to the University Library 07/18/2007 T-1327