Scientists say that in UK, the number of beetles, butterflies, bees and wasps has fallen by up to 60%. Many countries are worried about the disappearance of bees and butterflies. Scientists say the decline in insect populations will lead to many problems for humans. One of the biggest ...
根据As the world's number of bees has been falling in recent years,many countries and places are looking for methods to protect these lovely insects.The UK city of Leicester has its own plan in the works.随着近年来世界蜜蜂数量的下降,许多国家和地方都在寻找保护这些可爱昆虫的方法。英国莱斯特市...
1972. Likelihood An Account of the Statistical Concept of Likelihood and its Application to Scientific Inference. Cambridge University Press, London. Google Scholar Laidlaw, H H, Gomes, F P, and Kerr, W E. 1956. Estimation of the number of lethal alleles in a panmitic population of Apis ...
Care for bees: for many reasons and in many ways Pollinating insects are in decline, probably worldwide. This may imply a pollination crisis, for (food) crops as well as wild plants. Eventually this decline might result in great economic losses, a human food crisis and loss of natural .....
Scientists say that in the UK, the number of butterflies, bees and wasps(黄蜂) has fallen by up to 60 percent. Many countries are worried about the disappearance of them.Scientists say the decline in insect populations will lead to many problems for humans. One of the biggest dangers is ...
C As the number of bees has continue d to fall in recent years, many countries are looking for ways to protect these lovely insects. The UK city Leicester has a plan of its own.The city has begun to turn its traditional bus stops into Living Roofs or Bee Bus Stops to draw bees'an...
Sex determination in bees XXI. Number of xo-heteroalleles in a natural population of Melipona compressipes fasciculata (Apidae) 来自 掌桥科研 喜欢 0 阅读量: 689 作者: WE Kerr 摘要: Data are produced that allows estimating the number of xo-heteroalleles ofMelipona compressipes fasciculata as ...
W. E. Kerr, "Sex determination in bees XXI. Number of xo- heteroalleles in a natural population of Melipona compressipes fasciculata (Apidae)," Insectes Sociaux, vol. 34, no. 4, pp. 274- 279, 1987.Kerr, W.E. 1987 . Sex determination in bees. XXI. Number of XO-heteroalleles in ...
[translate] a我下车后 After I got out[translate] acount and compare the number of bees to the number of flowers 与花的数量计数并且比较蜂的数量[translate]
WOYKE, J; JASINSKI, Z (1990) Effect of the number of attendant worker bees on the initiation of egg laying by instrumentally inseminated queens kept in small nuclei. Journal of Apicultural Research 29(2): 101-106.Woyke J,Jasinski Z.Effect of the number of attendant worker bees on the ...