Some days ago I had asked:
"Has anyone a good idea on how sampling data from active gears (beach seine,
trawls; as fish per haul, fish per m2 or per m3) may be directly compared
with data from passive gears (gill-nets, traps; fish per fleet per hour,
fish per hour)?"
I have got only two replies; in both a reference was mentioned:
1)Connolly, R. M. (1994) Comparison of fish catches from a bouyant pop
net and a beach seine in a shallow seagrass habitat. Marine Ecology
Progress Series (109): 305-309.
2)Van Den Avyle, M.J., et al. 1995. Comparison of six gears for sampling
reservoir fish populations. North American Journal of Fisheries
Obviously, a definite solution cannot be given.
Thanks for your help
Dr. Thomas Mehner
Institute of Water Ecology and Inland Fisheries
Dept. Biology & Ecology of Fishes
Phone: ++49/(0)30/641 81 613
Fax: ++49/(0)30/641 81 750
e-mail: [log in to unmask]
more information: http://www.igb-berlin.de/www/abt4/oki/mehner.htm