Transcript 2013 - City of Santa Cruz

Fish in the San Lorenzo River Lagoon
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• Invertebrate
species including:
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Dungeness crab
rock crab
shrimp
kelp isopod
ctenophore
nudibranch
isopod
squid
octopus
amphipods
isopods
clam (Corbicula)
kelp crab
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Patterns of Use
Marine Transients
Estuary Dependent
Estuary/Marine
Migratory-Anadromous
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Giant kelpfish
Marine transient
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Tidewater goby
Estuary dependent
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Topsmelt
Estuary/marine
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Starry flounder
Estuary/marine
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Striped mullet
Estuary/marine
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Bay pipefish
Estuary/marine
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Surfperch
Estuary/marine
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Chinook salmon
Anadromous
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Chinook salmon
Anadromous
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Steelhead/rainbow trout (O. Mykiss)
Anadromous
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Simplified Salmonid
Life-cycle
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Arroyo Seco Foundation
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Abundance Monitoring Focus
• Abundance (June and September)
– Catch per Unit Effort in seining surveys (2004, 2005,
2008-2014)
– Mark-recapture with fin clips (2011) and PIT tags
(2012-2015)
• Growth (length)
• Age (scale samples)
• Condition (smolt stage, incidence of parasites/disease)
• Movement
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P assive
I ntegrated
T ransponder
tag
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San Lorenzo Lagoon Steelhead Catch per Unit Effort
35.0
30.8
30.0
Early Summer
Mid-summer
Fall
28.3
Catch Per Unit Effort
25.0
21.5
20.0
14.4
15.0
13.0
10.0
8.4
7.7
6.0
4.7
5.0
2.5
0.2
0.1
0.4
0.3
2.0
1.7
1.2 1.1
0.0
0.0
2004
2008
2009
2010
2011
2012
2013
2014
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2012
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Sept 13 14:30
Sept 14 7:00
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2013
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2013
– June: open lagoon during mark period, closed on last day of
mark period
– CPUE 0.7 during mark period, 3.2 after lagoon closed
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2013 (continued)
– July: Lagoon closed
– CPUE up to 8.4 (from 3.2 in June)
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2013 Fall-mark period
– Lagoon open during mark period (Sept 12-13)
– September CPUE 7.9, comparable to July (8.4)
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2013 Fall- recapture period
– Lagoon closes between mark and recapture periods
– CPUE drops from 7.9 to 1.5
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Growth (mm/day)
Growth Rate
Source
San Lorenzo
2012
0.58-0.84
City/HES
San Lorenzo
2013
0.27-0.41
City/HES
San Lorenzo
2005
0.4-0.9
Laguna
2012
0.86
City/HES
Laguna
2013
0.22-0.78
City/HES
Navarro
1996
0.13-0.61
Cannata 1998
0.4
Zedonis 1992
Mattole
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CLEAP study
Growth Rate
Marked In
Spring
Recovered in
Fall
Recapture
Rate
2013
0.58-0.84
0.27-0.41
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50
5
2
16%
4%
2014
NA
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0
0%
2012
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Conclusions
• The lagoon is a complex ecosystem used by many aquatic species, including
steelhead
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Conclusions
• The lagoon is a complex ecosystem used by many aquatic species, including
steelhead
• Steelhead use of the lagoon is variable and complex
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Conclusions
• The lagoon is a complex ecosystem used by many aquatic species, including
steelhead
• Steelhead use of the lagoon is variable and complex
• There is movement of many species, possibly including steelhead, between
the lagoon and the ocean during periods when the lagoon is open
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Conclusions
• The lagoon is a complex ecosystem used by many aquatic species, including
steelhead
• Steelhead use of the lagoon is variable and complex
• There is movement of many species, possibly including steelhead, between
the lagoon and the ocean during periods when the lagoon is open
• Abundance of juvenile steelhead is relatively low for the size of the lagoon
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Conclusions
• The lagoon is a complex ecosystem used by many aquatic species, including
steelhead
• Steelhead use of the lagoon is variable and complex
• There is movement of many species, possibly including steelhead, between
the lagoon and the ocean during periods when the lagoon is open
• Abundance of juvenile steelhead is relatively low for the size of the lagoon
• Abundance of all species, including steelhead, is highly variable from year to
year and month to month
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Conclusions
• The lagoon is a complex ecosystem used by many aquatic species, including
steelhead
• Steelhead use of the lagoon is variable and complex
• There is movement of many species, possibly including steelhead, between
the lagoon and the ocean during periods when the lagoon is open
• Abundance of juvenile steelhead is relatively low for the size of the lagoon
• Abundance of all species, including steelhead, is highly variable from year to
year and month to month
• Steelhead use the lagoon under both open and closed conditions
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Conclusions
• The lagoon is a complex ecosystem used by many aquatic species, including
steelhead
• Steelhead use of the lagoon is variable and complex
• There is movement of many species, possibly including steelhead, between
the lagoon and the ocean during periods when the lagoon is open
• Abundance of juvenile steelhead is relatively low for the size of the lagoon
• Abundance of all species, including steelhead, is highly variable from year to
year and month to month
• Steelhead use the lagoon under both open and closed conditions
• Highest abundance of steelhead has been in years with higher flows when
the lagoon is open for larger amounts of time or breaches frequently, lowest
abundance has been in years with lower flows and extended closure.
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Contributors:
Zeke Bean
Suzy Boyd
Ryan Yarbrough
Ryan Bassett
Randy Holloway
Noriko Kawamoto
Michelle Leicester
Melissa Farinha
Laird Henkel
Kristina Finstad
Kristin Kittleson
Kelleen Harter
Judie Cole
Jon Jankovitz
Jeremy Farr
Jessica Missaghian
Jeff Hagar
Hagar Environmental Science
[email protected]
510-333-9410
Greg Pepping
Doug Sommerville
Corinne Gray
Chris Sulots
Chris Coburn
Chris Berry
Billy Norman
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