|
March
21 through April 12, 2005
Salmonid Passage Between March 21 and April 12, no
salmonids passed the Stanislaus River weir. The last salmonid (Chinook)
passing upstream through the weir was observed about three months
earlier on January 12. The weir was removed from the
river on April 11-12 due to several months of no salmonids passing
the weir and the need to remove the weir before VAMP begins and
flows increase.
Other Species Five non-salmonid
species were detected passing
upstream through the weir during the sampling period
including Sacramento pikeminnow (n=3), Striped bass (n=1), Sacramento sucker
(n=47),
Goldfish (n=1) and Common carp (n=7). Of these species, the Sacramento sucker was
most abundant.
Livebox Trapping Trapping was
conducted between March 24 and March
30 due to an increase in turbidity (range:
4.1 NTU to 50.0 NTU). Under high turbidity
levels, the digital camera is unable to produce clear photographs
of fish passing through the Vaki. Trapping is conducted
whenever turbidity exceeds 4 NTUs. The only
fish captured during the trapping period was a Sacramento sucker (March
29; 455 mm).
A data report summarizing the 2004-05 results will be created in
the near future and will be available for download on
www.sanjoaquinbasin.com/stanislaus-river.html |
