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Octopus

Physiology and Behaviour of an Advanced Invertebrate

  • M. J. Wells

Table of contents

  1. Front Matter
    Pages N2-xiv
  2. M. J. Wells
    Pages 1-10
  3. M. J. Wells
    Pages 11-23
  4. M. J. Wells
    Pages 24-62
  5. M. J. Wells
    Pages 63-81
  6. M. J. Wells
    Pages 82-110
  7. M. J. Wells
    Pages 111-140
  8. M. J. Wells
    Pages 141-177
  9. M. J. Wells
    Pages 178-216
  10. M. J. Wells
    Pages 246-291
  11. M. J. Wells
    Pages 292-331
  12. M. J. Wells
    Pages 332-368
  13. Back Matter
    Pages 369-417

About this book

Introduction

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.

Keywords

aging anatomy behavior blood vessel brain fish growth learning physiology predator reproduction solution sorption system transport

Authors and affiliations

  • M. J. Wells
    • 1
  1. 1.Department of ZoologyUniversity of CambridgeUK

Bibliographic information

  • DOI https://doi.org/10.1007/978-94-017-2468-5
  • Copyright Information Springer Science+Business Media B.V. 1978
  • Publisher Name Springer, Dordrecht
  • eBook Packages Springer Book Archive
  • Print ISBN 978-94-017-2470-8
  • Online ISBN 978-94-017-2468-5
  • Buy this book on publisher's site