scholarly journals Power to detect trends in Missouri River fish populations within the Habitat Assessment Monitoring Program

2010 ◽  
Author(s):  
Janice L. Bryan ◽  
Mark L. Wildhaber ◽  
Dan W. Gladish
Keyword(s):  
Monitoring Program ◽  
Missouri River ◽  
Fish Populations ◽  
Habitat Assessment ◽  
River Fish

Habitat assessment, Missouri River at Hermann, Missouri

2002 ◽  
Author(s):  
Robert B. Jacobson ◽  
Mark S. Laustrup ◽  
Joanna M. Reuter
Keyword(s):  
Missouri River ◽  
Habitat Assessment

Assessing power of large river fish monitoring programs to detect population changes: the Missouri river sturgeon example

2011 ◽  
Vol 27 (2) ◽  
pp. 282-290 ◽  
Author(s):  
M. L. Wildhaber ◽  
S. H. Holan ◽  
J. L. Bryan ◽  
D. W. Gladish ◽  
M. Ellersieck
Keyword(s):  
Missouri River ◽  
Large River ◽  
Population Changes ◽  
Monitoring Programs ◽  
Fish Monitoring ◽  
River Fish

Decline in Natural Fisheries — A Genetic Analysis and Suggestion for Recovery

1986 ◽  
Vol 43 (6) ◽  
pp. 1298-1306 ◽  
Author(s):  
Giora W. Wohlfarth
Keyword(s):  
Negative Selection ◽  
Natural Waters ◽  
Environmental Changes ◽  
Monitoring Program ◽  
Fish Populations ◽  
Natural Environments ◽  
Direct Effects ◽  
Resident Population ◽  
Selection For ◽  
Bodies Of Water

Overfishing and pollution of the aquatic environment, in addition to their direct effects on natural fisheries, may have also influenced natural fish populations genetically. Overfishing drastically reduces population size and, since the larger individuals are selectively removed, is equivalent to selection for smaller sized fish. Adaptation of natural fish populations to their environment must have been reduced by rapid environmental changes resulting from pollution and infestation. Inbreeding, negative selection, and lack of adaption are here considered as the genetic causes for the decline of natural fisheries and lack of recovery. Restocking programs involving hatchery stocks are unlikely to solve this problem, since these stocks were selected for adaptation to hatchery environments and not to natural environments. A series of studies have demonstrated heterosis of interstrain crossbreds, mainly between hatchery and wild stocks of salmonids, for performance in natural waters. Two strategies could be implemented in restocking programs: stocking spawners of a domestic strain (preferably of one sex) for interbreeding with the resident population or direct stocking of crossbred fry. This should be tested in small isolated bodies of water and needs to be accompanied by a monitoring program in order to evaluate the results and minimize hazards.

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