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Critical habitat, movement, and spawning behaviour of Silver Shiner (Notropis photogenis) in the Grand River, Ontario

This project was made possible with assistance from the OMNR SARSF Fund


 

Abstract: Silver Shiners (Notropis photogenis) were captured and habitat was characterized from 26 locations in the Grand River during the summer and autumn of 2013. Length-weight regression was W=1E-05L2.915 (r2=0.99, n = 96) and population size structure and qualitative growth patterns suggested rapid growth during the first 2 years after hatching. Cobble was the most frequently used substrate type (54.2 % of observations) and diet consisted of 90 % aquatic and terrestrial insects. Movement and behaviour were also recorded and transcribed from 56 events using fixed and mobile underwater video cameras from 2006 to 2013. Silver shiners moved upstream during late afternoon and evening in October/November to overwintering areas. Silver Shiners were located near known sources of groundwater seepage during 84.6 % of observations, suggesting that groundwater may represent critical habitat that facilitates persistence of Silver Shiner populations in Canada.

 
Silver Shiners - Grand River 2009

Fall Silver Shiner migration to over-wintering habitat - Grand River, Ontario
 


BRAVO Underwater Video November 7 2009

 

   
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