Alister Hardy - The Open Sea - The World of Plankton

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The New Naturalist editors believe this to be the greatest general work on the subject ever written.Professor Alistair Hardy is truly obsessed by animals of the sea – devotedly enthusiastic about the nature of their adaptations and life histories, brilliantly critical in the examination of their mysteries, acutely lucid (and at the same time highly artistic) in his descriptions of them in his arresting plates.To describe the relatively unknown and mysterious world of plankton is a task that the greatest of marine zoologists might boggle at. Yet the plankton is to the sea what vegetation is to the land. The study of plankton is a complex discipline which few amateur naturalists have had the privilege to enjoy. Never before has such a synthesis of knowledge been attempted in a community of animals so mysterious, yet so important. Professor Hardy has grasped this problem in a new and exciting way; and at least the common reader can discern the pattern of life that dominates two-thirds of the world’s surface.

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Collins New Naturalist Library

34

The Open Sea – Its Natural History:

The World of Plankton

Alister C. Hardy

EDITORS JAMES FISHER MA JOHN GILMOUR MA JULIAN HUXLEY MA DSC - фото 1

EDITORS:

JAMES FISHER, M.A.

JOHN GILMOUR, M.A.

JULIAN HUXLEY, M.A., D.SC, F.R.S.

L. DUDLEY STAMP, G.B.E., D.LITT., D.SC.

PHOTOGRAPHIC EDITOR:

ERIC HOSKING, F.R.P.S.

The aim of this series is to interest the general reader in the wild life of Britain by recapturing the inquiring spirit of the old naturalists. The Editors believe that the natural pride of the British public in the native fauna and flora, to which must be added concern for their conservation, is best fostered by maintaining a high standard of accuracy combined with clarity of exposition in presenting the results of modern scientific research. The plants and animals are described in relation to their homes and habitats and are portrayed in the full beauty of their natural colours.

Table of Contents

Cover

Title Page

Editors

Editors’ Preface

Author’s Preface

CHAPTER 1

INTRODUCTION

CHAPTER 2

THE MOVEMENT OF THE WATERS

CHAPTER 3

PLANTS OF THE PLANKTON

CHAPTER 4

SEASONS IN THE SEA

CHAPTER 5

INTRODUCING THE ZOOPLANKTON

CHAPTER 6

LITTLE JELLY-FISH AND LESSER FORMS OF LIFE

CHAPTER 7

SIPHONOPHORES AND THE LARGER JELLY-FISH

CHAPTER 8

MORE ANIMALS OF THE PLANKTON—BUT NOT THE CRUSTACEANS

CHAPTER 9

THE PLANKTONIC CRUSTACEA

CHAPTER 10

PELAGIC LARVAL FORMS

CHAPTER 11

THE PUZZLE OF VERTICAL MIGRATION

CHAPTER 12

LIFE IN THE DEPTHS

CHAPTER 13

PHOSPHORESCENCE AND PHOTOPHORES

CHAPTER 14

SQUIDS, CUTTLEFISH AND KIN

CHAPTER 15

PLANKTON AND THE FISHERIES

Glossary

Bibliography

Index

Colour Plates

Plates in Black and White

Copyright

About Publisher Page

EDITORS’ PREFACE

PROFESSOR HARDY began his marine biologist’s life over a third of a century ago on his return from service in the first world war. After Oxford and a scholarship to the Stazione Zoologica at Naples, he soon became a member of the Fisheries Department in the Ministry of Agriculture and Fisheries; and, in the middle ‘twenties, served as Chief Zoologist to the R.R.S. Discovery expedition, to the Antarctic seas, making a special study of plankton. His subsequent professorships—first at University College (now the University of) Kingston-upon-Hull; next at Aberdeen; and since 1945 at the University of Oxford—have brought him the highest academic status and honours, but have not kept him away from his beloved sea. In the closing stages of the writing of this volume, as the editors well remember, he was correcting the typescript, and completing his unique and wonderful colour illustrations, on the deck of the latest Royal Research Ship, Discovery II , scanning the contents of each netting or dredging, sketching new or rare creatures of the sea before their colour faded, applying himself to his research with an enthusiasm excelling that of most naturalists of half his age.

If the editorial board were asked to select from Professor Hardy’s many scientific qualities that which has contributed most to the creation of this extraordinary book, they would perhaps settle for enthusiasm. Throughout The Open Sea it is quite apparent that he is devotedly obsessed by, and interested in, animals; he is eternally curious about the nature of their adaptations and lives, brilliantly critical in the examination of their mysteries, acutely lucid and at the same time highly artistic in his depiction of them in his remarkable plates. It was a welcome burst of enthusiasm that caused Professor Hardy to write so much and so well of the life of the sea that he has written us two books instead of one. It is the first of these, concerned with the general natural history of the open sea and the world of its plankton, that we here welcome. The second part of The Open Sea concerns the open sea’s fish and fisheries, and will be published some time in 1957 or early 1958; like the present book, it will be illustrated by Professor Hardy’s own colour paintings, which represent what no colour-camera has yet been able to catch, and by black and white photographs by that most distinguished marine biologist and skilful photographer, Douglas P. Wilson.

To most readers the subject of this first of Professor Hardy’s two contributions to our series—the world of Plankton—will be relatively unknown and mysterious; but here the enlightened amateur naturalist is shown how, with modest equipment he may investigate it himself. The world of plankton is a world of complex anatomy, much of which can be understood only with the lens of the microscope. The life-histories of the animals are also complicated; some of them are extraordinary. To describe the plankton of our seas, and to set it in its pattern of community, climate, sea-scene and season is a major task. Professor Hardy has brought vast knowledge and experience and scholarship to a synthesis never before attempted.

THE EDITORS

AUTHOR’S PREFACE

ORIGINALLY it had been intended that the whole natural history of the sea, apart from that of the sea-shore and of the sea-birds already dealt with in the New Naturalist series, should be treated in one general volume. As the writing proceeded, however, it became clear that to do justice to the subject it would be impossible to include all its different elements within a single cover. There is the life of the plankton in almost endless variety; there are the many kinds of fish, both surface and bottom living; there are the hosts of different invertebrate creatures on the sea-floor; and there are those almost grotesque forms of pelagic life in the oceans depths. Then there are the squids and cuttlefish, and the porpoises, dolphins and great whales. In addition man’s fisheries now play such an important part in the ecology of our waters that they also must form a part of any general natural history of the sea.

Certainly there is too much material to go into one volume. There occurs, however, a fairly natural division between the teeming planktonic world and the other categories of life it supports: the fish, the whales and the animals of the sea-bed. This first book on the open sea deals mainly with the plankton; it aims at giving the general reader a non-technical account, save for the necessary scientific names, of its many remarkable animals and showing how, with only a little trouble, quite a lot of them may be seen and studied alive. Perhaps to some it may introduce a new world of life—a world so unusual that few of its inhabitants have homely English names at all. It is hoped, too, that it may be a guide to the plankton for university students who are beginning their studies in marine biology. The book also deals with the water-movements and the seasons in the sea; and it contains an account of the squids and cuttlefish, and of those queer creatures, including the deep-water (and often luminous) fish, swimming in the great depths only a little way beyond our western coasts. It will conclude by showing how a study of the plankton is helping us to have a better understanding of the lives of our commercially important fish. Later, and before very long, will come the sequel: a separate volume devoted mainly to fish and fisheries, but also including whales, turtles and other marine animals which are likewise, directly or ultimately, dependent on the plankton for food.

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