Seasonal emission of seminal coagulum and in vivo sperm dynamics in the black-handed spider monkey ( Ateles geoffroyi)

The ejaculate of diverse primate species consists of two portions, liquid and solid; the latter, known as the seminal coagulum, is thought to sequester large numbers of sperm. In the black-handed spider monkey ( Ateles geoffroyi), ejaculates collected by electroejaculation did not always contain sem...

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Bibliographic Details
Published in:Theriogenology 2008-03, Vol.69 (4), p.466-472
Main Authors: Hernández-López, L., Cerda-Molina, A.L., Páez-Ponce, L.D., Mondragón-Ceballos, R.
Format: Article
Language:English
Subjects:
Animals
Ateles
Atelinae - physiology
dry season
Ejaculation
Electric Stimulation
Female
female fertility
Female reproductive tract
Fertility
Insemination, Artificial - veterinary
Male
male fertility
monkeys
reproductive synchrony
seasonal variation
Seasonality
Seasons
Semen
Semen - physiology
semen quality
Seminal coagulum
sperm concentration
Sperm Count
Sperm Motility
sperm quality
sperm transport
spermatozoa
Spermatozoa - physiology
Spider monkey
Uterus - cytology
wet season
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Summary:The ejaculate of diverse primate species consists of two portions, liquid and solid; the latter, known as the seminal coagulum, is thought to sequester large numbers of sperm. In the black-handed spider monkey ( Ateles geoffroyi), ejaculates collected by electroejaculation did not always contain seminal coagulum. The objective of the present study was to determine seasonal emission of seminal coagulum and in vivo sperm dynamics in the black-handed spider monkey. Seminal coagulum emission was related to season; it was more frequent in the dry season, coincident with maximal female fertility. Sperm concentration was higher ( P = 0.02) in the dry season (dry vs. rainy season: 137.9 ± 15.7 sperm/mL vs. 82.56 ± 14.7 × 10 6 sperm/mL; mean ± S.E.M.) but also in ejaculates (collected during the rainy season) that had seminal coagulum (coagulum vs. no coagulum: 140.0 ± 29.3 sperm/mL vs. 31.2 ± 0.1 × 10 6 sperm/mL, P < 0.001). In semen samples collected from the uterus after AI, the percentage of linearly motile sperm was higher during the dry season (dry vs. rainy: 9.1 ± 2.1% vs. 5.9 ± 2.5%), as well as whenever coagulum was present (coagulum vs. no coagulum: 13.0 ± 3.2% vs. 2.0 ± 0.9%, P < 0.001).
ISSN:0093-691X
1879-3231
DOI:10.1016/j.theriogenology.2007.10.016