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【新书出版】Crabs of Marine and Freshwater
作   者: Jawad  
印刷版ISBN:978-1-987842-04-3
电子版ISBN:978-1-987842-05-0
出版社:加拿大索菲雅出版集团
 
  • Crabs are crustaceans’ animals, which typically have a very short projecting tail or abdomen, usually entirely hidden under the thorax. There are thousands of species of crabs inhabiting all the world's oceans, fresh water, and on land. They characterised in having a thick exoskeleton covering their body and have a single pair of claws.  Sexes of crabs can be differentiated in morphological features with males often have larger claws. These claws are usually used in communication during mating season. The end of the abdomen is narrow and triangular in male, while it is broad in female. The crabs play an important role in the marine and freshwater ecosystems and in the recent years large number of the crab’s species became endangered. Therefore, conservation man...
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