Fourth European Marine Biology Symposium

The two themes of the Fourth European Symposium on Marine Biology, which took place in Bangor, North Wales, in September 1969, were Larval Biology and Light in the Marine Environment. Originally published in 1971, this volume of edited proceedings from the symposium gives specialist information on the behaviour and structure of larvae of animals that attach themselves to rocks, pilings, ships' hulls, etc. The biology of these organisms is important, both in relation to ship fouling and to mariculture (farming of the sea). It is the larval stage that is vitally important because this is the disseminating phase which enables the organism to find a suitable habitat. The second part of the volume is concerned with the measurement of light in the sea and its effect on the growth of marine algae, and on the behaviour and reproduction of marine animals.

Editor's foreword and opening address; Part I. Theme A: The Biology of Marine Invertebrate Larvae; Section 1. Field Observations: 1. The dispersal of the larvae of shoal-water benthic invertebrate species over long distances by ocean currents; 2. Transport of bivalve larvae in a tidal estuary; 3. Observations on the occurrence of planktonic larvae of several bivalves in the Northern Adriatic Sea; 4. Comparative investigations of the development of epibenthic communities from Gloucester, Massachusetts to St Thomas, Virgin Islands; 5. Settlement of mussel larvae, Mytilius edulis, on suspended collectors in Norwegian waters; Section 2. Experiments on Behaviour and Distribution: 6. On the ecology of young Idotea in the Baltic; 7. Choice of algae by larvae of Spirobis, particularly of Spirorbis spirobis; 8. Settlement and orientated growth in epiphytic and epizoic byozoans; 9. Settlement and growth pattern of the parasitic barnacle Pyrgoma anglicum; 10. Electrophotetic examination of partially purified extracts of Balanus balanoides containing a settlement inducing factor; 11. The biology of larvae of Ophilitaspongia seriata from two North Wales populations; 11. Host selection and ecology of marine digenean larvae; Section 3. Growth, Development and Fine Structure: 12. Effet de la température sur le développement endotrophe des plutéus; 13. La forme elliptique de la relation température-durée de développement embryonnaire chez les copépodes pelagiques et ses propiétés; 14. The effect of cyclic temperatures on larval development in the mud-crab Rhithropanopeus harrisii; 15. Les véligères planctoniques de Prosobranches de la région de Banyuls-sur-Mer (Méditerranée occidentale): phylogénie et métamorphose; 16. Concerning the fourth antennulzr segment of the cypris larva of Balanus balanoides; 17. The fine structure of the trochophore of Harmothoe imbricata; 18. Développement larvaire de Microspio mecznikowianus; 19. Some morphological changes that occur at the metamorphosis of the arvae of Mytilius edulis; 20. The histology of the larva of Ostrea edulis during metamorphosis; 21. Transient larval glands in palaemonetes; 22. Spicule formation and corrosion in recently metamorphosed syon ciliatum (O. Fabricus); Part II. Theme B: Light in the Marine Environment; Section 1. Measurement of Illumination and its Influence in Submarine Environment: 1. The measurement of inshore submarine irradiation; 2. Continuous recording of underwater light in relation to Laminaria distribution; 3. Seasonal growth of Laminaria hyperborea under recorded underwater light conditions near Helgøland; 4. The effect of light on the growth of algal spores; 5. Light quality and the photomorphogenesis of alge in marine environments; 6. Studies on the responses of marine phytoplankton to light fields of varying intensity; 7. Light and the distribution of organisms in a sea cave; 8. Light conditions and shade seeking populations among algal settlements; 9. Responses of the larvae of Diposoma listerianum to light and gravity; 10. Food searching potential in marine fish larvae; 11. A new light trap for plankton; 12. Responses to light of Asterias rubens; 12. Diurnal rhythms in snails and starfish; 13. Orientation to light and the shading response in barnacles; 14. The light sensitivity and light environment of Corophium volutator (abstract only); 15. La lumière et le déclenchement de la ponte chez Ciona intestinalis; 16. Light controlled swarming in the polychaete Autolytus (abstract only); 17. Light and gonad development in Pontoporeia affinis; Index.