The Plankton of the SeaAmerican Elsevier Publishing Company, 1966 - 426 pagine |
Dall'interno del libro
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Pagina 79
R. S. Wimpenny. adult and is known as the ' ratarula ' larva . This has a simple small float with a rudimentary sail and eventually develops into the adult . Speculations on the origin of the siphonophoran body are quite confused . There ...
R. S. Wimpenny. adult and is known as the ' ratarula ' larva . This has a simple small float with a rudimentary sail and eventually develops into the adult . Speculations on the origin of the siphonophoran body are quite confused . There ...
Pagina 106
... adult which quite quickly succeeds it in a sudden metamorphosis . For most echino- Figure 47. The planktonic adult sea - cucumber Pelagothuria ludwigi Chun . Length of body about 40 mm . derms planktonic life only occurs in the larval ...
... adult which quite quickly succeeds it in a sudden metamorphosis . For most echino- Figure 47. The planktonic adult sea - cucumber Pelagothuria ludwigi Chun . Length of body about 40 mm . derms planktonic life only occurs in the larval ...
Pagina 113
... adult at that stage . By this process , known to zoologists as ' neoteny ' , it misses out the adult stage it formerly possessed . Garstang considered that in this case the adult would not have been fixed but a pelagic one of the ...
... adult at that stage . By this process , known to zoologists as ' neoteny ' , it misses out the adult stage it formerly possessed . Garstang considered that in this case the adult would not have been fixed but a pelagic one of the ...
Sommario
PREFACE page | 13 |
INTRODUCTION | 17 |
THE FIELDS of the Sea | 43 |
Copyright | |
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adult Algae algal amphipod Antapical Antarctic Appendicularia Arctic arrow worm auxospore Biddulphia biol Biological body bottom Calanus Calanus finmarchicus called carbon cells Ceratium Chaetoceros Chaetognatha ciliated Cleve coast coastal copepods Coscinodiscus Crustacea deep water depth diameter diatoms distribution Dorsal eggs Ehbg elegans euphausid Expedition female Figure fish Fisheries flagellated floating G. O. Sars genera genus gonozooid growth Grun hauled Hensen individuals jelly-fish Laboratory larva latitudes latter layer light living lower marine medusa mentioned mouth Mysidae neritic North Atlantic North Sea Norwegian Sea number of species nutrients occur oceanic organic matter oxygen parasite pelagic peridinians Peridinium photophores photosynthesis phyto phytoplankton plankton plankton organisms plants Plate polyp population produced Rhizosolenia round Sagitta samples Sars sea water seasonal segments shell shrimps spores stage standing crop stations Steemann Nielsen surface water swimming temperature thoracic Thysanoessa tion tropical tube Uropod Ventral vertical warmer zone zooplankton