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Selected
Reports Prepared by Milne Technologies 2007
Cold & Grist Lake Hydroacoustic Survey Report:
Methodology and Summary of Results. Table
of Contents.
2007 Wabamun Lake Hydroacoustic
Survey Report: Methodology and Summary of Results.
Table
of Contents.
2007 Lac La Biche, AB Hydroacoustic
Survey Report: Methodology and Summary of Results.
Table
of Contents.
2007 Myrt and Hood Lakes Hydroacoustic
Survey Report: Abundance and spatial distribution
of lake trout (Salvelinus namaycush) in two
Northern Ontario lakes. Table
of Contents.
Double-Crested Cormorant and
Coastal Fish Monitoring and Assessment in the North
Channel and Georgian Bay, Lake Huron: Field Methods,
Site Descriptions and Analysis Information. Download
Full Report
A methodology for estimating
the abundance and spatial distribution of zooplankton
in lakes using a high-frequency single-beam 710 kHz
hydroacoustic system. Download
Full Report.
Journal Articles
Dunlop, E.S., Milne, S.W.,
Ridgway, M.S, Condiotty, J., Higginbottom, I. 2010.
In situ swimming behavior of lake trout observed using
integrated multibeam acoustics and biotelemetry. Transactions
of the American Fisheries Society 139:420-432.
Dunlop, E.S., Milne, S.W.,
Ridgway, M.S. 2010. Temporal trends in the numbers
and characteristics of Lake Huron fish schools between
2000 and 2004. Journal of Great Lakes Research
36:74-85.
Milne, S.W.,
Shuter, B.J., Sprules, W.G. 2005. The schooling and
foraging ecology of lake herring (Coregonus artedii)
in Lake Opeongo, Ontario, Canada. Canadian Journal
of Fisheries and Aquatic Sciences 62:1210-1218.
Abstract
We used a combination of suspended
gill nets and hydroacoustics to investigate the
schooling behaviour of lake herring (Coregonus
artedi) in Lake Opeongo, Ontario, Canada.
Lake herring form schools during the day but are
dispersed at night and this change occurs at a
light threshold of roughly 0.04 lx. Schools range
in maximum linear dimension from 100 to 2300 cm
with the majority under 1000 cm. The light threshold
for school formation is well below that at which
their principal predator, lake trout (Salvelinus
namaycush), are able to detect prey. This
suggests that schooling may provide advantages
in addition to predator avoidance. We observed
that lake herring stomachs were fuller during
the day than at night, indicating that schooling
herring forage more efficiently during the day
than individual herring do at night. Furthermore,
herring stomach fullness increased with school
size, suggesting that schooling enhances foraging
opportunities for individual members. We speculate
that this is due either to social facilitation
of feeding when herring are in the presence of
conspecifics, or to corporate vigilance, or "many
eyes", which allows individual fish to spend
less time being alert to predators and more time
feeding.
Please contact Milne
Technologies for a copy of any of the above publications.
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