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Inside this Book – This book is but one of several biologies of Crustacea that might be written. The choice of material for inclusion has been a personal one, and has been biased by my own interests. It follows that no attempt has been made to be all embracing. There are, doubtless, many other topics which might justifiably have been included, hut I make no apology for their absence: the space allowed is not unlimited, and the treatment of some topics is already over- condensed. While I am not much troubled by what has been omitted, I am deeply conscious of the possibility of error in what has been included; if I have misinterpreted anyone’s work I should he grateful for being corrected.
Inside this book –A biology of Crustacea PDF Book by Green, J. (James) – Most people have seen a crustacean at one time or another; crabs, lobsters, shrimps and woodlice are common enough, but there are also myriads of smaller less conspicuous Crustacea unknown to the layman. The aquarist probably knows Daphnia as ‘ the water flea ‘ and does not consider it as a relative of the lobster. Why are such different creatures included in the same group? One answer would be that they both have external skeletons and jointed limbs — features which they share with other arthropods such as insects, spiders and centipedes; they also have other similarities such as a pair of mandibles which act as jaws, and they have two pairs of appendages in front of the mouth — characters which distinguish them from other arthropods. But such an answer, although it is technically correct, is not very satisfying. In order really to understand why water fleas and lobsters belong to the same group it is necessary to know about other creatures belonging to the group and to know about their various ways of life.
A biology of Crustacea by Green, J. (James) PDF : eBook Information
- Full Book Name – A biology of Crustacea
- Author of this Book – Green, J. (James)
- Language – English
- Book Genre – Non Fiction, Crustacea, Novel
- Download Format – PDF
- Size – 13.8 MB
- eBook Pages –208
- Price – Free