Íomhá Chlúdaigh

Semen characteristics of Bornean sun bear Helarctos malayanus euryspilus

The Bornean sun bear (Helarctos malayanus euryspilus), endemic to Borneo island, is the subspecies of the Malayan sun bear. The species is at risk, not just because of anthropogenic threats, but also slow reproduction in the wild. In captivity, due to poor reproductive performance, assisted reprodu...

Cur síos iomlán

Saved in:
Sonraí Bibleagrafaíochta
Main Authors: Yeoh, Boon Nie, Zainuddin, Zainal Zahari, Hiew, Mark Wen Han, Sidik, Siti Aisyah
Formáid: Article
Teanga:English
Foilsithe: Elsevier BV 2022
Rochtain Ar Líne:http://psasir.upm.edu.my/id/eprint/103168/1/103168.pdf
Clibeanna: Cuir Clib Leis
Gan Chlibeanna, Bí ar an gcéad duine leis an taifead seo a chlibeáil!
id oai:psasir.upm.edu.my:103168
record_format eprints
spelling oai:psasir.upm.edu.my:103168 http://psasir.upm.edu.my/id/eprint/103168/ Semen characteristics of Bornean sun bear Helarctos malayanus euryspilus Yeoh, Boon Nie Zainuddin, Zainal Zahari Hiew, Mark Wen Han Sidik, Siti Aisyah The Bornean sun bear (Helarctos malayanus euryspilus), endemic to Borneo island, is the subspecies of the Malayan sun bear. The species is at risk, not just because of anthropogenic threats, but also slow reproduction in the wild. In captivity, due to poor reproductive performance, assisted reproductive technology is deemed a fundamental tool to propagate the depleting numbers of the Bornean sun bear. This is a pioneer study that presents the semen characteristics of the Bornean sun bear via conventional semen evaluation methods. Forty two semen samples from ten sun bears were collected via electroejaculation and evaluated. The electroejaculator probe (2.5 cm in diameter and 7.0 cm in length) was inserted rectally and positioned dorsal to the prostate gland. The optimum voltage used to obtain semen differed with each individual, but all showed hindlegs contraction and penile erection before ejaculation. The average combined testes volume in the Bornean sun bear was 23.37 ± 5.09 cm³ . The mean semen volume was 617.30 µL, with sperm concentration of 1034.40 × 10⁶ sperm/mL and pH 7.79. Sperm viability was 80.19% with a general motility of 79.13% and progressive movement of 70.20%. There were high sperm abnormalities at 70.67%. Sun bear sperm length was 61.28 ± 2.46 µm and consisted of an oval head, midpiece, and tail. From this study, good semen donors were identified from the captive Bornean sun bear population in Sabah, Malaysia. The fresh semen baseline data established in this study will provide crucial reference for assisted reproduction programs in the Bornean sun bear. Elsevier BV 2022 Article PeerReviewed text en cc_by_nc_nd_4 http://psasir.upm.edu.my/id/eprint/103168/1/103168.pdf Yeoh, Boon Nie and Zainuddin, Zainal Zahari and Hiew, Mark Wen Han and Sidik, Siti Aisyah (2022) Semen characteristics of Bornean sun bear Helarctos malayanus euryspilus. Theriogenology Wild, 1. art. no. 100002. pp. 1-7. ISSN 2773-093X https://www.sciencedirect.com/science/article/pii/S2773093X22000022 10.1016/j.therwi.2022.100002
institution UPM IR
collection UPM IR
language English
description The Bornean sun bear (Helarctos malayanus euryspilus), endemic to Borneo island, is the subspecies of the Malayan sun bear. The species is at risk, not just because of anthropogenic threats, but also slow reproduction in the wild. In captivity, due to poor reproductive performance, assisted reproductive technology is deemed a fundamental tool to propagate the depleting numbers of the Bornean sun bear. This is a pioneer study that presents the semen characteristics of the Bornean sun bear via conventional semen evaluation methods. Forty two semen samples from ten sun bears were collected via electroejaculation and evaluated. The electroejaculator probe (2.5 cm in diameter and 7.0 cm in length) was inserted rectally and positioned dorsal to the prostate gland. The optimum voltage used to obtain semen differed with each individual, but all showed hindlegs contraction and penile erection before ejaculation. The average combined testes volume in the Bornean sun bear was 23.37 ± 5.09 cm³ . The mean semen volume was 617.30 µL, with sperm concentration of 1034.40 × 10⁶ sperm/mL and pH 7.79. Sperm viability was 80.19% with a general motility of 79.13% and progressive movement of 70.20%. There were high sperm abnormalities at 70.67%. Sun bear sperm length was 61.28 ± 2.46 µm and consisted of an oval head, midpiece, and tail. From this study, good semen donors were identified from the captive Bornean sun bear population in Sabah, Malaysia. The fresh semen baseline data established in this study will provide crucial reference for assisted reproduction programs in the Bornean sun bear.
format Article
author Yeoh, Boon Nie
Zainuddin, Zainal Zahari
Hiew, Mark Wen Han
Sidik, Siti Aisyah
spellingShingle Yeoh, Boon Nie
Zainuddin, Zainal Zahari
Hiew, Mark Wen Han
Sidik, Siti Aisyah
Semen characteristics of Bornean sun bear Helarctos malayanus euryspilus
author_facet Yeoh, Boon Nie
Zainuddin, Zainal Zahari
Hiew, Mark Wen Han
Sidik, Siti Aisyah
author_sort Yeoh, Boon Nie
title Semen characteristics of Bornean sun bear Helarctos malayanus euryspilus
title_short Semen characteristics of Bornean sun bear Helarctos malayanus euryspilus
title_full Semen characteristics of Bornean sun bear Helarctos malayanus euryspilus
title_fullStr Semen characteristics of Bornean sun bear Helarctos malayanus euryspilus
title_full_unstemmed Semen characteristics of Bornean sun bear Helarctos malayanus euryspilus
title_sort semen characteristics of bornean sun bear helarctos malayanus euryspilus
publisher Elsevier BV
publishDate 2022
url http://psasir.upm.edu.my/id/eprint/103168/1/103168.pdf
_version_ 1819301400642846720
score 13.4562235

Míreanna Comhchosúla