繁殖年限 的英文怎麼說
中文拼音 [fánzhíniánxiàn]
繁殖年限
英文
breeding age-
Our findings about reproductive biology are still limited, but they indicate that females have their first foal at five or six years of age, rather than the more common four or five years, and then may give birth every other year
對于非洲野驢的繁殖，我們的研究仍然有限，但是已經觀察到雌驢產下第一胎的年齡，並非一般常見的4 ~ 5歲，而是在5 ~ 6歲左右，之後則是每隔一年生產一次。Good dams ? the gos is a milky breed and a good dam. in many cases, sows will continue breeding at a greater age than many breeds and hybrids
繁殖率高- - - - - - - - - -格洛斯特郡斑點豬的繁殖性能非常好。無論在什麼情況下，母豬比其它的品種和雜交豬種使用年限長。Crested ibis ( nipponia nippori ), a kind of peculiar wading bird in east asians facing its extinction because of humanbeings " economic activities. seven crested ibises found at yong county shaanxi province in 1981 were the all wild individuals left in the world then. to protect this rare bird, scholars have carried out a great deal of researches on it in many areas. however, till now, studies is mainly confined to some areas such as ecology and morphology, little was done in the area of molecular biology. phenomina such as disable individuals increasing and adults " producing ability decreasing occurred more frequent in recent years. these badly affected the existence and development of this species. so, getting the information about crested ibis " gene and genetic diversity through studies at molecular level and setting up scientific producing and protecting projections are becoming urgent tasks
為保護這?瀕危鳥類，我國學者對朱?展開了多方位的研究。然而迄今為止，這些研究主要限於生態學、形態學等方面，分子生物學領域則很少涉及。近年來朱?種群頻繁出現諸如殘疾幼鳥增多、成鳥繁殖力下降等問題，已嚴重影響到種群的生存與發展，因此，從分子水平對朱?進行研究，了解其基因信息和遺傳多樣性，並確定個體之間的親緣關系，從而制定科學、合理的繁殖計劃與保護對策，已成為當務之急。
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