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Alan Weaver Fish Passage Coordinator Virginia Dept. of Game and Inland Fisheries VA/NC AFS Chapters Joint Meeting Catfish Symposium March 17, 2016

VA/NC AFS Chapters Joint Catfish Symposium · Virginia Dept. of Game and Inland Fisheries VA/NC AFS Chapters Joint Meeting Catfish Symposium March 17, 2016. Dam Removal ... Channel

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Page 1: VA/NC AFS Chapters Joint Catfish Symposium · Virginia Dept. of Game and Inland Fisheries VA/NC AFS Chapters Joint Meeting Catfish Symposium March 17, 2016. Dam Removal ... Channel

Alan WeaverFish Passage Coordinator

Virginia Dept. of Game and Inland Fisheries

VA/NC AFS Chapters Joint MeetingCatfish Symposium

March 17, 2016

Page 2: VA/NC AFS Chapters Joint Catfish Symposium · Virginia Dept. of Game and Inland Fisheries VA/NC AFS Chapters Joint Meeting Catfish Symposium March 17, 2016. Dam Removal ... Channel

Dam RemovalAlways considered firstBest overall approachMost benefits 

Technical Fishway (e.g., vertical slot)When removal is not feasibleAdvantageous for counting fish 

Nature‐like FishwayBecoming more popularGood alternative when feasible

Page 3: VA/NC AFS Chapters Joint Catfish Symposium · Virginia Dept. of Game and Inland Fisheries VA/NC AFS Chapters Joint Meeting Catfish Symposium March 17, 2016. Dam Removal ... Channel

Dam RemovalAlways considered firstBest overall approachMost benefits 

Technical Fishway (e.g., vertical slot)When removal is not feasibleAdvantageous for counting fish 

Nature‐like FishwayBecoming more popularGood alternative when feasible

Page 4: VA/NC AFS Chapters Joint Catfish Symposium · Virginia Dept. of Game and Inland Fisheries VA/NC AFS Chapters Joint Meeting Catfish Symposium March 17, 2016. Dam Removal ... Channel

4

Chesapeake Bay

James River

Boshers Fishway

Page 5: VA/NC AFS Chapters Joint Catfish Symposium · Virginia Dept. of Game and Inland Fisheries VA/NC AFS Chapters Joint Meeting Catfish Symposium March 17, 2016. Dam Removal ... Channel
Page 6: VA/NC AFS Chapters Joint Catfish Symposium · Virginia Dept. of Game and Inland Fisheries VA/NC AFS Chapters Joint Meeting Catfish Symposium March 17, 2016. Dam Removal ... Channel

Boshers Dam Vertical Slot Fishway

Page 7: VA/NC AFS Chapters Joint Catfish Symposium · Virginia Dept. of Game and Inland Fisheries VA/NC AFS Chapters Joint Meeting Catfish Symposium March 17, 2016. Dam Removal ... Channel

American ShadSea LampreyAmerican Eel (returning elvers; not counted)Blueback Herring (very few)Striped Bass (very few)Smallmouth Bass and Largemouth BassGizzard Shad (numerically dominant; 90%)Common CarpQuillbackShorthead RedhorseLongnose GarBlue Catfish, Flathead Catfish and Channel CatfishRainbow Trout and possibly Brown TroutFallfish and Bull Chub, etc.

Page 8: VA/NC AFS Chapters Joint Catfish Symposium · Virginia Dept. of Game and Inland Fisheries VA/NC AFS Chapters Joint Meeting Catfish Symposium March 17, 2016. Dam Removal ... Channel

American ShadSea LampreyAmerican Eel (returning elvers; not counted)Blueback Herring (very few)Striped Bass (very few)Smallmouth Bass and Largemouth BassGizzard Shad (numerically dominant; 90%)Common CarpQuillbackShorthead RedhorseLongnose GarBlue Catfish, Flathead Catfish and Channel CatfishRainbow Trout and possibly Brown TroutFallfish and Bull Chub, etc.

Page 9: VA/NC AFS Chapters Joint Catfish Symposium · Virginia Dept. of Game and Inland Fisheries VA/NC AFS Chapters Joint Meeting Catfish Symposium March 17, 2016. Dam Removal ... Channel

American ShadSea LampreyAmerican Eel (returning elvers; not counted)Blueback Herring (very few)Striped Bass (very few)Smallmouth Bass and Largemouth BassGizzard Shad (numerically dominant; 90%)Common CarpQuillbackShorthead RedhorseLongnose Gar

Blue Catfish, Flathead Catfish and Channel CatfishRainbow Trout and possibly Brown TroutFallfish and Bull Chub, etc.

Page 10: VA/NC AFS Chapters Joint Catfish Symposium · Virginia Dept. of Game and Inland Fisheries VA/NC AFS Chapters Joint Meeting Catfish Symposium March 17, 2016. Dam Removal ... Channel

Channel Catfish widely stocked including in the  Upper James by the 1890sBlue Catfish widely stocked in the James watershed in the 1970s, but not necessarily well established in the Middle James mainstemFlathead Catfish discovered in the Upper James by the 1980s and known to be well established throughout the James by the 1990sJenkins and Burkhead 1993  and several personal communications

Page 11: VA/NC AFS Chapters Joint Catfish Symposium · Virginia Dept. of Game and Inland Fisheries VA/NC AFS Chapters Joint Meeting Catfish Symposium March 17, 2016. Dam Removal ... Channel

Fishway Counts Evolution 1999 – First season of operation

Live; 3‐4 days/week; 6 hoursExpanded over daylight hours  

2000 – Mostly live and some regular VHS 2001 – 2002 Time lapse vhs reviewed post‐season2003 – Present:  Digital Video

Record and review all hours of useable video through 2008 (all spp)Started 15 minute increment review in 2005 (all) 2010 – AMS, SMB only:  Review only first 15 minutes (Expand)2012 – Sea Lamprey counted again2014 – All spp again for at least this year

Page 12: VA/NC AFS Chapters Joint Catfish Symposium · Virginia Dept. of Game and Inland Fisheries VA/NC AFS Chapters Joint Meeting Catfish Symposium March 17, 2016. Dam Removal ... Channel

Fishway Counts continued

Simulated hourly expansions were not significantly different from known hourly counts for 2007 Gizzard Shad – i.e. estimate method is soundBlue Catfish 2007 estimates also proved to be solid based on statistical analyses Generally, every 5th day is a 24 hour review to subsample night passage (Sea Lamprey, three catfish species, occasional Gizzard Shad)Night passage results expanded for useable days of video to get season estimates

Page 13: VA/NC AFS Chapters Joint Catfish Symposium · Virginia Dept. of Game and Inland Fisheries VA/NC AFS Chapters Joint Meeting Catfish Symposium March 17, 2016. Dam Removal ... Channel

0

50

100

150

200

250

Num

ber o

f BCF

  Passed

Day

Blue Catfish 2007 Daily Totals

Expanded (4x)totalReal total

Page 14: VA/NC AFS Chapters Joint Catfish Symposium · Virginia Dept. of Game and Inland Fisheries VA/NC AFS Chapters Joint Meeting Catfish Symposium March 17, 2016. Dam Removal ... Channel

Fishway Counts continued

Simulated expansions from known counts were not significantly different from known counts for 2007 Gizzard Shad – i.e. estimate method is soundBlue Catfish 2007 estimates also proved to be solid based on statistical analysesGenerally, every 5th day is a 24 hour review to subsample night passage (Sea Lamprey, three catfish species, occasional Gizzard Shad)Night passage results expanded across useable days of video to get season estimates

Page 15: VA/NC AFS Chapters Joint Catfish Symposium · Virginia Dept. of Game and Inland Fisheries VA/NC AFS Chapters Joint Meeting Catfish Symposium March 17, 2016. Dam Removal ... Channel
Page 16: VA/NC AFS Chapters Joint Catfish Symposium · Virginia Dept. of Game and Inland Fisheries VA/NC AFS Chapters Joint Meeting Catfish Symposium March 17, 2016. Dam Removal ... Channel

0

200

400

600

800

1000

1200

1400

1600

0

1000

2000

3000

4000

5000

6000

7000

Hours of Video View

ed

No. Fish Passed

CCF

BCF

FCF

Hours Viewed

TOTAL PASSED (Day and Night)

Page 17: VA/NC AFS Chapters Joint Catfish Symposium · Virginia Dept. of Game and Inland Fisheries VA/NC AFS Chapters Joint Meeting Catfish Symposium March 17, 2016. Dam Removal ... Channel

0

200

400

600

800

1000

1200

0

1

2

3

4

5

6Hours of Video View

edPassage Ra

te (fish/hr)

CCF

BCF

FCF

Hours Viewed

TOTAL PASSAGE RATE (Day and Night)

Page 18: VA/NC AFS Chapters Joint Catfish Symposium · Virginia Dept. of Game and Inland Fisheries VA/NC AFS Chapters Joint Meeting Catfish Symposium March 17, 2016. Dam Removal ... Channel

0

1

2

3

2005 2006 2007 2008 2014 2015 AVG

Passage Ra

te (fish /hr)

Channel Catfish 

day fish/hr

night fish/hr

0600‐2100 = Day2100‐0600 = Night

Page 19: VA/NC AFS Chapters Joint Catfish Symposium · Virginia Dept. of Game and Inland Fisheries VA/NC AFS Chapters Joint Meeting Catfish Symposium March 17, 2016. Dam Removal ... Channel

0600‐2100 = Day2100‐0600 = Night

0

1

2

3

4

5

6

2005 2006 2007 2008 2014 2015 AVG

Passage Ra

te (fish/hr)

Blue Catfish

day fish/hr

night fish/hr

Page 20: VA/NC AFS Chapters Joint Catfish Symposium · Virginia Dept. of Game and Inland Fisheries VA/NC AFS Chapters Joint Meeting Catfish Symposium March 17, 2016. Dam Removal ... Channel

0600‐2100 = Day2100‐0600 = Night

0

1

2

3

4

5

2005 2006 2007 2008 2014 2015 AVG

Passage Ra

te (fish/hr)

Flathead Catfish

day fish/hr

night fish/hr

Page 21: VA/NC AFS Chapters Joint Catfish Symposium · Virginia Dept. of Game and Inland Fisheries VA/NC AFS Chapters Joint Meeting Catfish Symposium March 17, 2016. Dam Removal ... Channel

Channels, Blues and Flatheads were all introduced into the watershed upstream of Boshers Dam prior to fishway installation (1999)Fishway counts contribute to knowledge on catfish movements from the James Fall Zone into the Piedmont (Middle James)Similar, and considerable, numbers of Channel Catfish and Blue Catfish use the fishwayFlathead Catfish passage numbers are relatively low in comparison 

Page 22: VA/NC AFS Chapters Joint Catfish Symposium · Virginia Dept. of Game and Inland Fisheries VA/NC AFS Chapters Joint Meeting Catfish Symposium March 17, 2016. Dam Removal ... Channel

Channel Catfish exhibit similar diurnal and nocturnal passage rates, slightly higher nocturnal rate of passageBlues and Flatheads both exhibit nocturnal passage rates that are considerably higher than diurnal ratesIncreasing the frequency of nocturnal video review may improve catfish passage estimatesRandom selection of the 15 minute increment will be implemented to further improve estimate methodOther abundance measurements such as boat electrofishing CPUE will be compared to passage numbers to determine if there is a correlation (more consistent years of counting catfish again is needed)Other variables that effect passage rates are flow and temperature

Page 23: VA/NC AFS Chapters Joint Catfish Symposium · Virginia Dept. of Game and Inland Fisheries VA/NC AFS Chapters Joint Meeting Catfish Symposium March 17, 2016. Dam Removal ... Channel

SUCCESS!

Page 24: VA/NC AFS Chapters Joint Catfish Symposium · Virginia Dept. of Game and Inland Fisheries VA/NC AFS Chapters Joint Meeting Catfish Symposium March 17, 2016. Dam Removal ... Channel

Video Reviewers:Robbie WillisKirk DunnWill McCahillChip AugustineAmy SandifordAndy TrentBishop BosherMatt FisherAndy MannAndrew Skelton

Data analysis:Aaron BunchLoren Maher (RMC FP Intern)

Maintenance:City of RichmondFP Crews

Page 25: VA/NC AFS Chapters Joint Catfish Symposium · Virginia Dept. of Game and Inland Fisheries VA/NC AFS Chapters Joint Meeting Catfish Symposium March 17, 2016. Dam Removal ... Channel

http://www.dgif.virginia.gov/fishing/shadcam/

Questions?