NSIS Volume 36 - Part 3/4
Permanent URI for this collectionhttps://hdl.handle.net/10222/15113
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Item Open Access Table of contents (v. 36, p. 3/4)(Dalhousie Printing Centre, 1986) Nova Scotian Institute of ScienceItem Open Access Proceedings of Meetings, Session of 1985-86, including President's report(Dalhousie Printing Centre, 1986) Nova Scotian Institute of ScienceItem Open Access The concept of the perilimnion(Dalhousie Printing Centre, 1986) Ogden, James Gordon, III; Nova Scotian Institute of ScienceSeasonal variations in surface and ground water supply and increasing attention to ionic and mass balances in aquatic eco-systems require more specific definitions of hydrologic parameters to recognize sources and sinks for biologically significant geochemistry. The term "Perilimnion" is proposed to define that zone of the catchment in which groundwater developed by surface runoff and percolation may enter (or leave) the limnic environment. The perilimnion, therefore, is an aquifer, whose geochemistry may affect, or be affected by, the waters of a lake. The term "Tardelimnion" is proposed to define that portion of the limnicenvironment in which deposition of limnogenic sediments (autochthonous or allochthonous) contribute to an aquitard, whose low coefficient of hydraulic permeability (<10-6 cm-1) virtually precludes significant hydrologic or geochemical interaction between lake and ground waters.Item Open Access Pannaria lurida in Atlantic Canada(Dalhousie Printing Centre, 1986) Maass, W.S.G.; Hoisington, B. L.; Harries, H.; Nova Scotian Institute of ScienceThe cyanophilic lichen Pannaria lurida has been collected from seventeen localities in southern Nova Scotia and two in southern New Brunswick. Previous reports of this lichen from Quebec are based on ill-identified or doubtful materials.Item Open Access The appendages of Lophoura tetraphylla Ho, 1985 (Copepoda: Sphyriidae) a parasite of Antimora rostrata in deep waters of the northwest Atlantic Ocean(Dalhousie Printing Centre, 1986) Hogans, W. E.; Nova Scotian Institute of ScienceThe detailed structure of the cephalothoracic appendages of Lophoura rerraphylla, a parasitic cope pod of Antimora rostrata, are described. The first and second antennae possess a structure similar to that reported for other genera in the family Sphyriidae. The morphology of the mandible of L. tetraphylla is discussed in relation to other previous descriptions of this appendage. Lophoura tetraphylla, like other members of the family, is shown to exhibit extensive regressive metamorphosis of the appendages during the mesoparasitic stage of its life cycle.Item Open Access Error bound strategies for a new hull plate expansion procedure(Dalhousie Printing Centre, 1986) Clements, Jeff C.; Gribble, J. D.; Nova Scotian Institute of ScienceAn improved version of a recently developed (Clements and Leon, 1986) isometric mapping procedure is presented. This algorithm employs a variable step differential equation solver (ODES) in conjunction with an adaptive quadrature routine (AQR). Criteria for choosing appropriate error tolerances for the numerical implementation of the algorithm are presented. An application is briefly discussed.Item Open Access An initial investigation of lipids and fatty acids of Nova Scotian "soft" cod(Dalhousie Printing Centre, 1986) Ackman, Robert G.,1927-; Ratnayake, W.M.N.; Ohshima, T.; Ke, P. J.; Nova Scotian Institute of Science"Soft" cod Gadus morhua are a regular economic problem in fisheries on the Scotian Shelf. A preliminary study has been conducted and a low fat content in viscera is the principal abnormality. The lipid content, lipid class profiles, and fatty acids of the fillets from two "soft oily" cod were also examined in this study and were relatively similar to those of one "control" fish as well as to "normal" Atlantic cod. It was however observed that the fatty acid details of the soh oily cod were slightly different from those in the literature for "normal" Atlantic cod. The aquarium-held control fish supplied by Fisheries and Oceans Canada also had a slightly different fatty acid composition. Lipids could not be directly associated with the soft cod condition.