Artificial Reef Program Biological Monitoring Update Artificial...SCUBA Roving Diver Surveys •...
Transcript of Artificial Reef Program Biological Monitoring Update Artificial...SCUBA Roving Diver Surveys •...
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Artificial Reef Program
Biological Monitoring Update
Texas Parks and Wildlife DepartmentCoastal Fisheries - Artificial Reef Program Brooke Shipley, Ph.D.
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Artificial Reef Program Over 4800 Acres
76 Established Reef Sites, 9 pending permit
approval
149 Platform & 12 Component Donations
30 Platform Donations in Progress
Rigs-to-Reefs Program Has Contributed $25.2
Million to Texas Artificial Reef Fund
Other Donations22 Vessels
Fabricated Materials
700 Quarry Rocks
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TPWD Biological Monitoring
• 1993 – present
• Swimming Diver Surveys
• REEF protocol
• 2012 - present
• Deep dives
(decompression)
• Lionfish removal
• Water quality monitoring
• 2013 – present
• Size estimation of fish
• Vertical long lines
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University and USGS Biological Monitoring
UT – Rio Grande Valley• (2007 – present)
• Diving surveys, biofouling, intermediate disturbance
hypothesis, economic impact study
TAMU – Corpus Christi • (2011 – present)
• Diving surveys, tagging surveys, vertical longline, remote
operated vehicle surveys
• Scuba diving socio-economic impact study
TAMU – Galveston • (2011 – present)
• Vancouver archeological survey
• Bottom surveys and bathymetry,
• Vertical longline, ARIS and acoustic surveys
TAMU – College Station• (2013-2014)
• Socioeconomic survey to anglers and boaters
USGS • (2013-present)
• Offshore water quality survey
• Nearshore AUV, water quality, substrate survey
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Rela
tive F
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2013 - 2015
Red Snapper Age Composition
Utilizing Parallel Lasers
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Vertical Line Methodology– Three differing hook sizes
fished per replicate.
– Three replicates per site
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Vertical Line CPUE - all Species
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CP
UE
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# g
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2012 2013 2014 2015
CP
UE
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ish
/ 5 m
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te / #
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Red Snapper Vertical Line CPUE
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CP
UE
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Red Snapper CPUE Between
Hook Sizes
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Red Snapper CPUE Between
Structure Types
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Bare Natural Culverts Reef Ball Pyramids Ship Cutoff Standing Topple Deck
CP
UE
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CP
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s / #
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Cutoff
Standing
Topple
Red Snapper CPUE Between
Platform Structures
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Re
lati
ve
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qu
en
cy
2012 - 2015
Red Snapper Age Composition
Utilizing Vertical Lines
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Red Snapper Age Composition
Between Lasers and Vertical Lines
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Vertical Line
Lasers
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Red Snapper Age Trends - NOAA
NOAA
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SCUBA Roving Diver Surveys
• SCUBA = 5 minute roving diver surveys on the top
of the structure; categorical data
• Sighting frequencies (% SF) calculated for each
species for all surveys.
– Rare = < 20%
– Common = 20-70%
– Frequent = > 70 %
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% SightFrequency
0 10 20 30 40 50 60 70 80 90 100
Cubera Snapper
Yellowtail Snapper
Lane Snapper
Vermilion Snapper
Red Snapper
Gray Snapper
Lutjanidae
0 10 20 30 40 50 60 70 80 90 100
Greater Amberjack
Blue Runner
Almaco Jack
Crevalle Jack
Horse-eye Jack
Rainbow Runner
Lookdown
Bar Jack
Yellow Jack
African Pompano
Black Jack
Permit
Carangidae
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% SF for species of
recreational/commercial importance
0 10 20 30 40 50 60 70 80 90 100
Gray Triggerfish
Vermilion Snapper
Red Snapper
Greater Amberjack
Gray Snapper
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0
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2
3
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1995 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2011 2012 2013 2014 2015
Abundant
Many
Few
Single
Red Snapper Diver Survey
Categorical Abundance
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Reef Ball Culverts Ship Cutoff Topple Standing Deck
Red Snapper Diver Survey
Structure Abundance
Abundant
Many
Few
Single
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0
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BA GA HI MI MU PN PS
Red Snapper Diver Survey
Regional Abundance
Abundant
Many
Few
Single
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1995
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2011
2012
2013
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2015
Deck
Standing
Topple
Cutoff
Ship
Reef Ball
Culverts
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10
20
Red Snapper Abundance
Shade Plot
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Non-metric MDSTransform: Square root
Resemblance: S17 Bray-Curtis similarity
SIMPROF
Culverts
Cutoff
Deck
Reef Ball
Ship
Standing Topple
2D Stress: 0
Reef Material as
Red Snapper Habitat
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Future Directions of
Biological Monitoring
• Water quality correlations to red snapper
abundance
• Comparisons between university sampling
and TPWD
• Genetics sampling and familial comparison
• Variations of abundance by depth and
location
• Material specific comparisons including
volume of material to abundance
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A B C
Habitat types:
A – Natural hard bottom reef
B – Standing Oil and Gas Platform
C – Reefed Oil and Gas Platform
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0.00
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0.01
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0.01
0.01
0.01
CP
UE
(#fi
sh
/ 5 m
inu
tes / #
gan
gio
ns
)
2012
2013
2014
2015
Vertical Line CPUE - all Species
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Relative Abundance
ANOVA; p = 0.371
n = 49 n = 41 n = 48
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Length FrequencyStanding
n = 397
Artificial
n = 516
Natural
n = 431
=
≠ ≠
K-S Test; p < 0.001
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Mean Age
ANOVA; p < 0.001
n = 679
Range = 2-30 yrs*
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Mean Age vs. Depth of Capturer = 0.79
p < 0.001