Zeng, Chaoshu, Lucas, John, and Southgate, Paul C. (2019) Freshwater decapod crustaceans. In: Lucas, John S., Southgate, Paul C., and Tucker, Craig S., (eds.) Aquaculture: farming aquatic animals and plants. John Wiley & Sons., Hoboken, NJ, USA, pp. 527-548.

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Abstract

[Extract] The crustacean order Decapoda is characterised by having five pairs of legs, as its name describes. The pairs of legs of a decapod often vary in form and function from anterior to posterior, with the anterior legs typically being more involved in feeding. Often one or more pairs of legs have chelae: pincer‐like structures at the appendage tip that are formed by the terminal segment articulating with a projecting 'finger' from the second last segment (Figure 23.1). These anterior chelipeds (legs with chelae) are enlarged in many species, with one of the pair being larger than the other. They may also be larger in males than females and of a different shape. Large chelipeds may be used in crushing robust prey such as bivalves, e.g., feeding by portunid crabs such as the mud crab (Figure 23.1), or in aggression and display by males, e.g., Macrobrachium rosenbergii (section 23.5). Where the anterior legs are highly specialised for feeding or display, it is left to the posterior legs to carry the role of locomotion. These walking legs may also be specialised, e.g., in swimming crabs the last pair of legs is specialised as paddles and the crabs swim laterally when moving rapidly. In other cases, the legs are adapted for digging into the substrate, as in shrimps.

Item ID:	62823
Item Type:	Book Chapter (Scholarly Work)
ISBN:	978-1-119-23086-1
Copyright Information:	© 2019 John Wiley & Sons Ltd
Date Deposited:	03 Sep 2020 00:22
FoR Codes:	07 AGRICULTURAL AND VETERINARY SCIENCES > 0704 Fisheries Sciences > 070401 Aquaculture @ 100%
SEO Codes:	83 ANIMAL PRODUCTION AND ANIMAL PRIMARY PRODUCTS > 8301 Fisheries - Aquaculture > 830101 Aquaculture Crustaceans (excl. Rock Lobster and Prawns) @ 100%
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