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Octopus: physiology and behaviour of an advanced invertebrate / M. J. Wells

Por: Wells, Martin John [autor/a].
Tipo de material: Libro
 impreso(a) 
 Libro impreso(a) Editor: Dordrecht, The Netherlands: Chapman and Hall Springer Science+Business Media, 1978Descripción: xiii, 417 páginas : fotografías, ilustraciones ; 22 centímetros.ISBN: 9401724709; 9789401724708.Otro título: Octopus [Título de cubierta].Tema(s): Pulpos | Conducta animalClasificación: 594.56 / W4 Nota de bibliografía: Incluye bibliografía: páginas 369-398 e índice: páginas 399-417 Número de sistema: 617Contenidos:Mostrar Resumen:
Inglés

Between the organ systems of cephalopods and those of less ambitious molluscs. Octopus does, as we would predict, live close to the limits set by its own physiology. The circulation, to take one example, is barely adequate for such an active animal, mainly because of the absence of any system for pack­ aging the blood pigment; haemocyanin in solution is a poor oxygen carrier. Cephalopod blood can transport less than 5 millilitres of oxygen per 100 ml of blood (compared with about 15 vol% in fish) and the whole supercharged system of triple hearts, high blood pressure and pulsating blood vessels succeeds only in returning blood that retains less than 30% of its dissolved oxygen by the time it reaches the gills. This at rest; the effect of exercise is immediate and surprisingly long­ lasting even in octopuses as small as 300 g, which must very swiftly run into oxygen debt when they flee from predators or pursue their prey (Sections 3.2.2, 3.2.4). Digestion, too would seem to be limiting. As with other molluscs, digestion in Octopus is based on secretion­ absorption cycles by a massive diverticulum of the gut, an adequate system in a less hectic past, but scarcely appropriate in a predator that must be an opportunist in the matter of feeding. Octopus feeds mainly at night, and spends a great deal of every day sitting at home.

Lista(s) en las que aparece este ítem: Cefalopodos del Golfo de México
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Acervo General 594.56 W4 Disponible ECO040006450

Incluye bibliografía: páginas 369-398 e índice: páginas 399-417

Acknowledgements.. 1. Introduction.. 2. An outline of the anatomy.. 3. Respiration, circulation and excretion.. 4. Feeding and digestion.. 5. Reproduction and growth.. 6. Endocrinology.. 7. An inventory of the sense organs.. 8. What an octopus sees.. 9. Touch and the role of proprioception in learning.. 10. Effectors and motor control.. 11. Learning and brain lesions: 1: Mainly tactile learning.. 12. Learning and brain lesions: 2: Visual learning.. References.. Author index.. Subject index

Between the organ systems of cephalopods and those of less ambitious molluscs. Octopus does, as we would predict, live close to the limits set by its own physiology. The circulation, to take one example, is barely adequate for such an active animal, mainly because of the absence of any system for pack­ aging the blood pigment; haemocyanin in solution is a poor oxygen carrier. Cephalopod blood can transport less than 5 millilitres of oxygen per 100 ml of blood (compared with about 15 vol% in fish) and the whole supercharged system of triple hearts, high blood pressure and pulsating blood vessels succeeds only in returning blood that retains less than 30% of its dissolved oxygen by the time it reaches the gills. This at rest; the effect of exercise is immediate and surprisingly long­ lasting even in octopuses as small as 300 g, which must very swiftly run into oxygen debt when they flee from predators or pursue their prey (Sections 3.2.2, 3.2.4). Digestion, too would seem to be limiting. As with other molluscs, digestion in Octopus is based on secretion­ absorption cycles by a massive diverticulum of the gut, an adequate system in a less hectic past, but scarcely appropriate in a predator that must be an opportunist in the matter of feeding. Octopus feeds mainly at night, and spends a great deal of every day sitting at home. eng

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