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cultivation in the intertidal region of India's Okha coast was developed. The alga can be cultivated by this technique throughout the year. Central Salt and Mar. Chem. Res. Inst., Bhavnagar 364 002, India. 87:6598 Rodhouse, P.G. and C.M. Roden, 1987. Carbon budget for a coastal inlet [Killary Harbour, Ireland] in relation to intensive cultivation of suspension-feeding bivalve molluscs. Mar. Ecol.Prog. Ser., 36(3):225-236. British Antarctic Survey, NERC, High Cross, Madingley Rd., Cambridge CB3 0ET, UK.
87:6599 Ukeles, Ravenna, G.H. Wikfors and J.W. Twarog Jr., 1984. Relative growth rate cycles in Crassostrea virginica (Gmelin) fed five algal diets. J. Shellfish Res., 4(2):155-159. NMFS, NEFC, Milford Lab., Milford, CT 06460, USA.
E370. Theoretical biology and ecology 87:6600 Hengeveld, R., 1987. Theories on biological invasions. Proc. K. ned. Akad. Wet., (C)90(1):45-48.
Biological invasions have been explained by a great number of theories, each of which contains one or more ecological parameters, such as climatic suitability of a region, presence or absence of pollinators, competitors or predators. To obtain an overview of all these theories, the parameters are first classified into two broad categories and then put into historical perspective. Finally, the need for formu-
lating non-equilibrium models is emphasized. Knoppersweg l l, 6668 AT Randwijk, Netherlands.
E400. Books, collections (general) 87:6601 Paine, R.T. et al., 1986. [International Symposium on Marine Littoral Ecology.] [Structure and function of littoral ecosystems.] Special issue. Estud. Oceanol., 5:107pp; 5 papers. (Spanish, some English.)
Three of the five papers deal with specific aspects of the rocky intertidal environment (climate and biogeography, structural analysis, and the effects of restricted human access). Included are a case study of Gracilaria survival strategy and a general overview of the status of marine community ecology. (gsb)
EAIO. Miscellaneous 87:6602 Watkins, B.P. and J. Cooper et al., 1986. Introduction, present status and control of alien species at the Prince Edward Islands, sub-Antarctic. S. Afr. J. Antarct. Rex., 16(3):86-128; 9 papers.
The impact on the islands' ecosystems of the introduction of alien species (both intentional and unintentional) by humans is examined. Four papers discuss predatory cats originally introduced to control the accidentally introduced mouse populations. Two general reports cover known alien species, their current status, and control strategies; two document plant invasions; and one is the case study of an alien invertebrate. (gsb)
F. GENERAL F10. Apparatus, methods, mathematics (multidisciplinary) 87:6603 Barton, G.S., 1987. NEDRES: an interactive computer tool for locating geophysical information. Eos, 68(19):514-515.
The National Environmental Data Referral Service, an environmental data base maintained by NOAA, which provides reference to interdisciplinary topics
( ~ 16,000 descriptions), can be accessed by a local phone call from a computer terminal or PC using a password available to anyone willing to pay for services at standard rates. The resulting information describes title; abstract; data collection, processing, and quality control; period and length of record; geographic location, description of parameters; contact to obtain data, availability, principal investigators, program or project, processing organization; and related publications. Natl. Environ. Data Referral Serv., NOAA, Washington, DC, USA. (hbf)