Evans, M.S. (1973). The distributional ecology of the calanoid copepod Pareuchaeta elongata Esterly. PhD Thesis, University of British Columbia, Vancouver, British Columbia, Canada. 112 pp.

86107

Evans, M.S.

1973

112 pp.  

Publication

http://hdl.handle.net/2429/31948

Available for editors   [request]

Many f i e l d and laboratory studies t e s t i n g the growth o f phytoplankton and the s u r v i v a l o f the e a r l y developmental stages o f zooplankton and benthic organisms have shown that sea waters that are a l i k e i n s a l i n i t y and temperature are nevertheless d i f f e r e n t i n other properties ( q u a l i t i e s ) . These d i f f e r e n c e s i n q u a l i t y may be associated with v a r i a t i o n s i n the concentrations o f d i s s o l v e d trace elements and organics. The concentration of a trace element or o r - ganic may have b e n e f i c i a l or harmful e f f e c t s on marine organisms. Bary (1963) suggested t h a t , i n c e r t a i n areas, these v a r i a t i o n s i n the properties of sea waters may be s u f f i c i e n t l y great, and the tolerance, o f zooplankton s u f f i c i e n t l y s m a l l , .for species to be r e s t r i c t e d to various waters. These waters, c a l l e d water bodies, were described by t h e i r temperature and s a l i n i t y c h a r a c t e r i s t i c s and the d i s t r i b u t i o n o f species was described i n r e l a t i o n to these water bodies. Many o f the species Bary.(1963) studied were at the northern' most or southern-most boundaries o f t h e i r geographic ranges. I t was the purpose o f t h i s study to i n v e s t i g a t e whether or not, within the geographic range of an organism, v a r i a t i o n s i n water q u a l i t y are an important environmental v a r i a b l e i n determining a species '• abundance and d i s t r i b u t i o n . The study organism was the calanoid copepod Pareuchaeta elongata . Lewis and Ramnarine (1969) had shown t h a t , i n the laboratory, the egg and the prefeeding n a u p l i a r stages were s e n s i t i v e to v a r i a t i o n s i n water q u a l i t y .

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