کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8403806 1544682 2018 18 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Semen analysis parameters from a captive population of the endangered Chacoan peccary (Catagonus wagneri) in Paraguay
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک علوم دامی و جانورشناسی
پیش نمایش صفحه اول مقاله
Semen analysis parameters from a captive population of the endangered Chacoan peccary (Catagonus wagneri) in Paraguay
چکیده انگلیسی
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 ± 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 ± 1.8 cm3 and 2.1 ± 0.1, respectively. Mean ejaculate volume was 2.9 ± 0.7 ml with a pH of 7.7 ± 0.3. Few male peccaries had motile spermatozoa (n = 5/9) with a mean percentage and progressive motility of 18.3 ± 8.5% and 0.6 ± 0.3, respectively. The mean percentage of live spermatozoa was 25.1 ± 5.6%. Male peccaries had a low percentage of normal spermatozoa (12.4 ± 2.5%). The mean total count of spermatozoa per ejaculate was also quite low at 1.58 ± 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 ± 7.4%), diadem/crater (17.7 ± 2.8%), and excess residual cytoplasm (9.6 ± 2.5%). Male age was not correlated with semen parameters (percent live: r=-0.19; motility percentage: r = 0.01; percent normal spermatozoa: r = 0.38; total count: r = 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.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Animal Reproduction Science - Volume 195, August 2018, Pages 162-167
نویسندگان
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