Correlative Analysis of Sperm Morphology, Seminiferous Epithelial Area and Testis Weight in the Boar
Basurto-Kuba, Victor Manuel
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https://hdl.handle.net/2142/71296
Description
Title
Correlative Analysis of Sperm Morphology, Seminiferous Epithelial Area and Testis Weight in the Boar
Author(s)
Basurto-Kuba, Victor Manuel
Issue Date
1982
Department of Study
Veterinary Medical Science
Discipline
Veterinary Medical Science
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Biology, Veterinary Science
Abstract
During six collections at two month intervals, testes and epididymides of 300 boars were collected at an abattoir. Sperm samples from both right and left cauda epididymis of each boar were collected from which two groups were identified using the criterion in the frequency of sperm abnormalities. Group A (Normal) had a frequency of abnormal spermatozoa considered to be consistent with normal fertility; and Group B (Abnormal) which had a high incidence of abnormal spermatozoa that would be expected to result in decreased fertility. In each group, seminiferous epithelial area (SEA) was taken by digitizing 50 seminiferous tubules per testis. Also, different degrees of histologic changes were determined for each testis from the same tissue sections. Testicular spermiostasis was examined macro and microscopically. Chicago, Illinois was the focal point of measuring temperature differences occurring throughout the year. The primary objective was to determine the possible correlation between different frequencies of sperm abnormalities from the cauda epididymis and the relative amount of seminiferous epithelium; and also to find if there is a relationship between these two variables and testis and epididymis weights in the boar. A second objective was to determine if temperature differences have any effect on the frequency of abnormal spermatozoa. The results demonstrated that higher frequencies of proximal droplets (PD), abnormal middle-piece (AMP) and abnormal heads (AH) had a negative correlation with the amount of SEA. It also was found that normal boars exhibited a positive correlation between testicular weight (TWT) and SEA while abnormal boars did not. Therefore, it appears that the SEA may be a relatively good indicator to determine testicular function. Regarding clinical evaluation of boars, the strong correlation of PD frequency with reduced SEA and the frequent association of other morphologic defects with the higher frequencies of PD indicates that this defect should be given more attention in semen examination than has been done in the past. Seasonal temperature changes did not appear to have a uniform depressing effect on sperm morphology in the present study.
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