oestrum

简明释义

英[ˈiːstrəm]美[ˈestrəm]

n. 牛虻；刺激；（雌性动物的）[动] 发情期

英英释义

单词用法

同义词

反义词

例句

1.The rate of cow's oestrum fecundation is one key factor of cattle's breeding rate.

奶牛情期受胎率是影响奶牛繁育率的重要因素之一。

2.The rate of cow's oestrum fecundation is one key factor of cattle's breeding rate.

奶牛情期受胎率是影响奶牛繁育率的重要因素之一。

3.During the mating season, many female mammals experience a heightened state known as oestrum.

在交配季节，许多雌性哺乳动物经历一种称为oestrum的高度状态。

4.Veterinarians monitor the signs of oestrum to determine the best time for breeding.

兽医监测oestrum的迹象，以确定最佳繁殖时间。

5.The oestrum cycle can vary significantly between different species.

不同物种之间的oestrum周期可能会有显著差异。

6.The hormonal changes during oestrum prepare the body for potential pregnancy.

在oestrum期间的激素变化为潜在的怀孕做好准备。

7.In dogs, the oestrum phase is often referred to as being 'in heat'.

在狗中，oestrum阶段通常被称为“发情”。

作文

In the study of animal behavior and reproductive cycles, the term oestrum (发情期) plays a crucial role. It refers to a specific phase in the reproductive cycle of female mammals during which they are receptive to mating and can conceive. This period is characterized by various physiological and behavioral changes that signal fertility. Understanding oestrum is essential not only for biologists but also for those involved in animal husbandry and veterinary medicine. The duration and nature of oestrum can vary significantly among different species. For instance, in dogs, this cycle occurs approximately twice a year, while in cows, it may happen every 21 days. During oestrum, females exhibit signs such as increased vocalization, restlessness, and a willingness to mate. These changes are driven by hormonal fluctuations, primarily the increase in estrogen levels, which prepare the body for potential pregnancy. From an ecological perspective, oestrum is vital for species survival. It ensures that mating occurs at optimal times, often coinciding with environmental conditions that favor the survival of offspring. For example, many animals give birth in spring when food is abundant. This synchronization of reproductive cycles with seasonal changes exemplifies the intricate relationships between organisms and their habitats. Moreover, understanding the mechanisms behind oestrum has practical applications. In agriculture, farmers monitor the oestrum cycles of livestock to optimize breeding schedules, enhance productivity, and improve herd genetics. Techniques such as artificial insemination are often timed to coincide with the peak of oestrum, maximizing the chances of successful conception. In wildlife conservation, knowledge of oestrum patterns can aid in the management of endangered species. By understanding their reproductive cycles, conservationists can implement strategies that support breeding programs, ensuring the continuation of vulnerable populations. However, it's important to note that the concept of oestrum is not limited to mammals alone. Some reptiles and birds also experience similar reproductive phases, although the terminology and specifics may differ. The study of oestrum across species highlights the diversity of reproductive strategies in the animal kingdom. In conclusion, the term oestrum (发情期) encapsulates a critical aspect of reproductive biology. Its implications extend beyond mere definitions, influencing agricultural practices, conservation efforts, and our understanding of animal behavior. As we continue to explore the complexities of life, the significance of oestrum remains a testament to the intricate balance of nature and the importance of reproduction in sustaining biodiversity.