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Gametophytes of E. radiata (C.Ag.)J.Ag. grew in culture at 15 degree C under daily quantum doses ranging from 0.86 to 360 cE m super(-2). Growth rates increased with quantum doses up to 40 cE m super(-2) d super(-1), then reproduction began and the relative growth constant declined while ovum releas...
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Interviews with government staff responsible for fisheries management in Maluku, Indonesia in 1997-98 revealed problems in capacity, and an emphasis on economic development rather than management. The traditional institutions which persisted in some villages to regulate the access and withdrawal rig...
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Since the first sublittoral survey off Lawrencetown, Nova Scotia in 1965--66 there has been a cycle of dominance by herbivorous sea urchins followed by mortality of these animals because of disease in 1981 and regrowth of algae. A survey of the same site in 1984 revealed that the algal communities p...
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This article presents the results of a study performed in 1997-98 on the presence, performance and institutional resilience of sasi, a local traditional resource management system in Central Maluku, Indonesia. The presence and functionality of sasi in 63 villages was determined by way of structured ...
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Growing and cast leaves of Zostera marina were sampled from May through December and in February in two embayments of the southern Gulf of St. Lawrence to determine the species composition and temporal pattern of macroalgal epiphytes. Thirty-eight species were identified. Some occurred sporadically ...
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The morphogenetic responses to temperature and photoperiod of plants from Nova Scotia, Canada belonging to the Scytosiphon lomentaria complex were evaluated. Formation of erect thalli by clonal isolates of S. lomentaria var. complanatus was controlled by temperature, and independent of daylength.
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Rings of dense tissue found in the base of the stipe of a long stiped variety of the perennial laminarian Ecklonia radiata in New Zealand result from a cycle of slow and rapid growth with periodic haptera production. These rings can be used to estimate the age of the plant. The diameter of the rings...
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E. radiata (C. Ag.) J. Ag. growing in Goat Island Bay, New Zealand produced up to 6 kg dry weight of tissue m super(-2) yr super(-1) in dense populations at 7-m depth. Half this tissue and an unknown amount of exudates were sloughed or torn off. Tissue production at 15 m was 0.3 to 0.5 kg m super(-2...
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Three species of Arctic to cold-temperate amphi-Atlantic algae, all occurring also in the North Pacific, were tested for growth and/or survival at temperatures of -20 to 30 degree C. When isolates from both western and eastern Atlantic shores were tested side-by-side, it was found that thermal ecoty...
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The life history of isolates of Sphaerotrichia divaricata from three sites in the Atlantic Ocean and three in the Pacific Ocean was studied in culture. Of the Pacific plants, two sporophytes were heterozygous, with offspring consisting of dioecious microscopic gametophytes, whereas microthallic prog...
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Gametophytes of E. radiata (C.Ag.)J.Ag. from two New Zealand locations with different field temperature ranges were exposed to temperatures of 5 degree to 26 degree C in saturating light. Plants from Goat Island Bay (Lat. 36 degree 16'S, Long. 174 degree 48'E) grew in 9.3 degree to 25 degree C and r...
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Two species of cold-temperate algae from the North Atlantic Ocean, Polyides rotundus and Furcellaria lumbricalis , were tested for growth and survival over a temperature range of -5 to 30 degree C. In comparisons of eastern and western isolates, both F. lumbricalis , a North Atlantic endemic, and P....
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Domoic acid (DOM), the toxin involved in amnesic shellfish poisoning, was presented to live mussels (at 5 degree C, 28 ppt) in dissolved form (125 nM) and as food encapsulated in liposomes. Less than 1% of dissolved DOM and up to 6% of food-borne DOM was incorporated into mussel tissues. DOM absorbe...