10/11/07
Some references that look good: (PDF files are attachments)
Methods for studying spatial behaviour of freshwater fishes in the natural environment
M.C. Lucas & E. Baras
Spatial behaviour of fishes in fresh and brackish water ranges in temporal scales between localized diel movements, often associated with foraging and predator evasion, to seasonal or life-cycle related events involving movements between freshwater habitat...
Fish and Fisheries, Volume 1, Issue 4, Page 283-316, Dec 2000, doi: 10.1046/j.1467-2979.2000.00028.x
We should consider obtaining this book ... it looks relevant based on the review (PDF attached)
Fisheries Acoustics: Theory and Practice, 2nd edn
Patrice A. J-P. Brehmer
Fish and Fisheries, Volume 7, Issue 3, Page 227-228, Sep 2006, doi: 10.1111/j.1467-2979.2006.00220.x