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Structure and function of the chelate pereiopods of the banana prawn Penaeus merguiensis

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Abstract

Penaeus merguiensis de Man systematically searches the substratum and removes small particles of food from it using the small chelae of the first three pairs of pereiopods. One or more chelae are used to transfer food particles to the mouth. The propus and dactylus of these limbs bear numerous setae arranged in discrete groups along the length of the segments. The tip of each seta is elaborately sculptured and has a large sub-terminal pore. It is probable that these are chemosensory organs responsible for discriminating edible from non-edible material. Proximal to almost every setal group is a much-branched seta (rarely two) which probably measures the depth to which the chela has been inserted into the substratum. At the articulation of the propus and carpus of the first pereiopod are three groups of differently sculptured setae, whose function is to clean the other chelate pereiopods. An elaborate system of pegs and a ridge on the apposable fringes of the chelae might be a mechano-receptive device with a particle size discriminating function. The ridges merge into opposable terminal denticulate pads whose function is to grasp food and other particles, which may be quite small (10 to 20 μm upwards).

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Communicated by G.F. Humphrey, Sydney

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Hindley, J.P.R., Alexander, C.G. Structure and function of the chelate pereiopods of the banana prawn Penaeus merguiensis . Mar. Biol. 48, 153–160 (1978). https://doi.org/10.1007/BF00395015

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  • DOI: https://doi.org/10.1007/BF00395015

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