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Community development following removal of urchins, Strongylocentrotus droebachiensis, from the rocky subtidal zone of the St. Lawrence Estuary, Eastern Canada
In the experimental area a sharp increase in the growth rate of a cohort of very small urchins, which was not eliminated by the removal effort, demonstrated that there is strong intraspecific competition amongst urchin competition when the food supply is limited.
Sea Urchins in the Saint Lawrence Estuary: Their Abundance, Size-Structure, and Suitability for Commercial Exploitation
Quantitative transects were made at nine locations along the Saint Lawrence Estuary, Quebec, to examine changes in the abundance and size-structure of populations of the green sea urchin,…
AN ALTERNATE GROWTH PATTERN FOR LAMINARIA LONGICRURIS 1, 2
A population of Laminaria longicruris de la Pylaie was followed for a year at Bic Island, Quebec, Canada where nutrient levels in the seawater were elevated throughout the year, enabling the kelp to take advantage of summer light and temperature conditions to grow rapidly.
Sea ice diatoms from Manitounuk Sound, southeastern Hudson Bay (Quebec, Canada). : II. Naviculaceae, genus Navicula
The genus Navicula is the major constituent of the sea ice diatom community of Manitounuk Sound, Hudson Bay and a new combination is proposed.
Environmental forcing versus endogenous control of photosynthesis in intertidal epilithic microalgae
The general hypothesis is that short-term variability in the photosynthetic capacity of intertidal epilithic microalgae is controlled primarily by endogenous phasing at neap tide and tidal forclng a t spring tide.
Le Phytoplancton de l'Estuaire moyen du Saint Laurent en amont de l'Ile‐aux‐Coudres (Québec). The Phytoplankton of the Upper St. Lawrence Estuary (Québec)
The authors give here a qualitative and quantitative description of the phytoplancton in the brackish waters of the St. Lawrence Upper Estuary (Quebec). The very high observed concentrations are the…
Sea ice diatoms from Manitounuk Sound, southeastern Hudson Bay (Quebec, Canada). III. Cymbellaceae, Entomoneidaceae, Gomphonemataceae, and Nitzschiaceae
Four families of diatoms, well represented in the ice microflora of Manitounuk Sound, Hudson Bay, are treated and one species and one variety are described as new in the genus Nitzschia.
Brooding behaviour of the northern sea star Leptasterias polaris
The northern sea star Leptasterias polaris (Müller and Troschel) has a unique mode of brooding its young. The mother curves her arms along the plane of the disc, the whole individual assuming a…
Sea ice diatoms from Manitounuk Sound, southeastern Hudson Bay (Quebec, Canada). I. Family Naviculaceae
Two new species and two varieties are described and a new combination is proposed of diatoms belonging to the family Naviculaceae.
FRAGILARIA AND SYNEDRA (BACILLARIOPHYCEAE) A MORPHOLOGICAL AND ULTRASTRUCTURAL APPROACH
The morphological and ultrastructural features of several Fragilaria and Synedra representatives are discussed and illustrated, raising once again the question of generic circumscription.