MACDONALD ET AL.: FISH ASSEMBLAGES AND THEIR SEASONAL MOVEMENTS 



perature at the Bay of Fundy, soft-bottom site, and 

 the greater seasonal stability of invertebrate food 

 resource production in this type of habitat ( Wildish 

 and Dadswell in press) may also be important. The 

 dynamic nature of the hard-bottom community, par- 

 ticularly among commercially valuable species, 

 emphasizes the need for well-designed, seasonal 

 sampling programs in order to properly assess the 

 occurrence of species and abundance offish stocks in 

 a local area. Long-term changes are apparent from 

 annual assessment data (Brown et al. 1973), but 

 higher resolution surveys at "type" localities are 

 needed to properly determine causative factors, 

 whether physical or biological. 



ACKNOWLEDGMENTS 



We thank Captain Tom Allen and Floyd Johnson, 

 crew of the Pandalus for their help. Bill McMullon 

 and Frank Cunningham prepared the figures and 

 Brenda Fawkes and Jeanine Hurley typed the 

 manuscript. J. S. Scott, W. B. Scott, D. Markle, and 

 D. J. Scarratt reviewed the manuscript. Work by J. S. 

 Macdonald was in partial fulfillment for Ph.D. 

 requirements supported by NSERC Grants to R. H. 

 Green. This work was supported in part by a grant 

 from the Canadian National Sportsman's Fund (4- 

 R88) to D. Methven. 



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