Problems attributable to long-term captivity have been identified and are responsible for the
difficulties in establishing successful reproduction in captive populations of wildlife …

Abstract Currently, more than 16,000 plant and animal species are imminently threatened by
extinction, often as a direct consequence of anthropogenic influences. One of the measures …

The northern white rhinoceros (NWR, Ceratotherium simum cottoni) is the most endangered
mammal in the world with only two females surviving. Here we adapt existing assisted …

White rhinoceroses suffer from a low reproductive rate in captivity. Intensive efforts to
propagate specifically the northern white rhinoceros have been very limited. The dismal …

When females copulate with multiple males, paternity is determined by the competitive
ability of a male to access females and by the ability of its ejaculates to out-compete those of …

This comparative analysis evaluated endocrine profiles and gestation length data of captive
pregnant black rhinoceros (Diceros bicornis), white rhinoceros (Ceratotherium simum), and …

The first successful artificial insemination (AI) in a rhinoceros was reported in 2007 using
fresh semen. Following that success, we decided to evaluate the possibility of using frozen …

The objective of this study was to develop AI and to achieve first time pregnancy in a
nulliparous rhinoceros. For this, one 24-year-old irregular cycling female white rhinoceros …

Extinction of a species represents the loss of a resource evolved through eons of mutations
and natural selection. Reproductive technologies, including artificial insemination, embryo …

This study examines (1) the effectiveness of transrectal, ultrasound-guided massage of the
accessory sex glands (TUMASG) combined with electroejaculation for obtaining aoudad …