Semen analysis parameters from a captive population of the endangered Chacoan peccary (Catagonus wagneri) in Paraguay.
Anim Reprod Sci
; 195: 162-167, 2018 Aug.
Article
en En
| MEDLINE
| ID: mdl-29807826
ABSTRACT
Baseline information about the reproductive physiology of an endangered species is vital to captive breeding programs. This study analyzed reproductive parameters from eleven captive Chacoan peccaries (Catagonus wagneri) (mean age 10.5⯱â¯1.2 years old) in Paraguay. After immobilization, testis length, width and firmness (hard to flaccid, 1-3) were assessed, followed by electroejaculation and analysis of semen. Samples were examined for percentage and progressive motility, total cell count, percentage live spermatozoa and morphology. Mean (±SEM) testis volume and firmness were 24.7⯱â¯1.8 cm3 and 2.1⯱â¯0.1, respectively. Mean ejaculate volume was 2.9⯱â¯0.7â¯ml with a pH of 7.7⯱â¯0.3. Few male peccaries had motile spermatozoa (nâ¯=â¯5/9) with a mean percentage and progressive motility of 18.3⯱â¯8.5% and 0.6⯱â¯0.3, respectively. The mean percentage of live spermatozoa was 25.1⯱â¯5.6%. Male peccaries had a low percentage of normal spermatozoa (12.4⯱â¯2.5%). The mean total count of spermatozoa per ejaculate was also quite low at 1.58⯱â¯1.01 million total spermatozoa per ejaculate. Spermatozoa defects were predominantly primary (77.7%) with the most common spermatozoa defects being tapered head (19.0⯱â¯7.4%), diadem/crater (17.7⯱â¯2.8%), and excess residual cytoplasm (9.6⯱â¯2.5%). Male age was not correlated with semen parameters (percent live r=-0.19; motility percentage râ¯=â¯0.01; percent normal spermatozoa râ¯=â¯0.38; total count râ¯=â¯0.29; p>0.05). Evaluation of additional males from this population as well as other captive populations at various time points during the year is warranted.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Artiodáctilos
/
Análisis de Semen
Límite:
Animals
País/Región como asunto:
America do sul
/
Paraguay
Idioma:
En
Revista:
Anim Reprod Sci
Año:
2018
Tipo del documento:
Article
País de afiliación:
Estados Unidos
Pais de publicación:
HOLANDA
/
HOLLAND
/
NETHERLANDS
/
NL
/
PAISES BAJOS
/
THE NETHERLANDS