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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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Lelepa is a small island off the northwestern coast of Efate in central Vanuatu. The history of the inshore fisheries of Lelepa Island is the story of changing technologies, changing gender roles and, most profoundly, changing needs and priorities of fisherpeople. Over time, marine species have deve...
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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....