By J Stanley Cobb; Bruce F Phillips
This two-volume paintings offers a precis and overview of the present country of lobster biology, ecology, body structure, habit, and administration. It emphasizes the biology of clawed lobsters (Nephropidae) and spiny lobsters (Palinuridae), with awareness additionally given to slipper lobsters (Scyllaridae) and coral lobsters (Synaxidae).The first bankruptcy of quantity 1 offers an outline of the final features of lobster biology that serves as an advent for readers of either volumes. next chapters research the themes of progress, neurobiology, replica, food, pathology, social habit, and. Read more...
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Extra info for The Biology and Management of Lobsters: Ecology and Management Vol. 1
W . G e o r g e Optic nerve Oculomotor Tegumentary Antennary nerve I nerve nerve Oesophagus Mandible Branches of 1st pedal nerve Cerebral ganglia Circumoesophageal connectives Post-oesophageal commissure Nerves to madible, maxillae & maxillipeds Suboesophageal 1-5th Thoracic ganglion Branches Ventral 1st ganglion of nerve 5th pedal nerve cord Abdominal ganglion Pleopedal nerve Dorso- lateral Longitudinal 6th Abdominal ganglion Fig. 14. Outer nerve connectives uropedal nerve The dissected central nervous system of Homarus (right) and Jasus (left).
General B i o l o g y 41 Fig. 1 8 . Frontal view of Homarus gammarus with the chelipeds removed to show the relative positions of the mouthparts. ro,rostrum; mp,mandibular palp; oa,ocular appendage; la, labrum; md, 2 3 mandible; mx ,second maxilliped; mx ,third maxilliped; ep,exopodite of third maxilliped, pr,second pereiopod. ) passe d to the mouth is 1 mm (Thomas and Davidson , 1962). Once at the mouth , the food particle is graspe d by the mandibles , while the third maxillipedspull down and away from the mouth , tearing it.
Long sarcomer e fibers are called "slow" and produc e slow, powerfu l contraction s that can be maintaine d over a considerabl e length of time, such as in the close r muscl e of the crushe r claw of Homarus. The muscle s are innervate d by one to eight axons , up to six of which may be excitator y and one or two inhibitory . The excitator y axons innervatin g slow fibers generall y are of small diamete r and show little fatigue during sustaine d nerve stimulation . Con versely , the axons innervatin g the fast fibers are generall y larger in diameter , fatigue rapidly upon stimulation , and have a large complemen t of synapti c vesi cles.