. A biology of Crustacea. Crustacea. FEEDING, LOCOMOTION AND RESPIRATION 23 pair of legs for holding on to its victim. A more active predatory mode of life has been adopted by Leptodora and Bythotrephes; in these genera the limbs have lost the filtering mechanism altogether and have become modified for grasping. The Notostraca feed on larger particles than most other Branchiopoda. Moderate sized particles are passed backwards by the tips of the beating limbs, and as the food travels backwards it is gradually brought nearer to the body, so that when it reaches the hind limbs it is down between
. A biology of Crustacea. Crustacea. FEEDING, LOCOMOTION AND RESPIRATION 23 pair of legs for holding on to its victim. A more active predatory mode of life has been adopted by Leptodora and Bythotrephes; in these genera the limbs have lost the filtering mechanism altogether and have become modified for grasping. The Notostraca feed on larger particles than most other Branchiopoda. Moderate sized particles are passed backwards by the tips of the beating limbs, and as the food travels backwards it is gradually brought nearer to the body, so that when it reaches the hind limbs it is down between their bases. The hind limb bases COMPOUND £YE. 3RD TRUNK Fig. 18. Head of a male Artemia salina (Anostraca). The large antennae are used to clasp the females. Note the forwardly directed spines on the maxillae, and the way in which the labrum overlaps the mandibles. Notice also the way in which the filter setae form walls to the median space between the two rows of limbs. break up the food to some extent—a feature reminiscent of the Conchostraca, and it is then passed forwards by the spiny inward projecting bases of the limbs. Each inward projection passes the food to the limb in front, and so ultimately to the mouth. There are no water currents of the type found in the Anostraca, and true filtratory setae are absent. Large food masses are sometimes held against the mouthparts by the front limbs and bitten into by the spiny bases of these limbs and the first maxillae. In spite of the. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Green, J. (James), 1928-. Chicago, Quadrangle Books
Size: 1655px × 1509px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookcollectionbiodiversit, booksubjectcrustacea
