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Wednesday, August 11, 1999
MidlineTransect (boat remains as close
to middle of river as possible)
Location: Samiria River
Observers:
- Shift 1: Bill, Sally, Marty, Shelly, Susan, Tamara
- Shift 2: Bill, Terry, Susan, Pat, Shelly, Tamara
- Shift 3: Sally, Marty, Terry, Lilia, Pat, Tamara
- Shift 4: Shelly, Lilia, Bill, Marty, Pat, Tamara
Platform: Deck of the Delfin
Position Start: s4417w7420
Position End: s4518w7422
Observer Positions: Data represents right side of the boat.
Moving upriver
Weather Conditions:
- Start: Overcast, wind speed 4.5 miles per hour, boat speed 5 miles
per hour
- Finish: Sunny, wind speed 7 miles per hour, boat speed 6.3 miles
per hour
Water Level: Low
Start time: 10:01 am, Finish time: 5:11 pm (Lunch 1:00 - 3:30)
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Position (longitude, latitude)
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Species
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Number
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Comments
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Boat Speed (miles per hour)
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River Width (meters)
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s4419w7420
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b
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1
|
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4.5
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273
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s4422w7420
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b
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1
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7.0
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132
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s4429w7421
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b
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2
|
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7.0
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132
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s4432w7421
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b
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1
|
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7.2
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210
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s4440w7421
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b
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2
|
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6.1
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202
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s4448w7420
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b
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2
|
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7.1
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164
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s4439w7419
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b
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1
|
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7.3
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163
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s4441w7419
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b
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1
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7.3
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163
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s4443w7418
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b
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2
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7.3
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163
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s4444w7418
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b
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1
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7.4
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153
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s4456w7418
|
t
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3
|
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7.3
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153
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s4453w7417
|
u
|
1
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small boat ahead distrubing ripple
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6.4
|
136
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s4459w7415
|
t
|
4
|
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7.5
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129
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s4461w7415
|
t
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2
|
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6.2
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208
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s4462w7415
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b
|
2
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one is a baby
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6.2
|
208
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s4466w7416
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b
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3
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one is a baby
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7.0
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159
|
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s4474w7416
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b
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1
|
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5.9
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155
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s4476w7416
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b
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3
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one is very small
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5.9
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155
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s4447w7415
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t
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2
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7.0
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155
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s4485w7415
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t
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5
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6.6
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149
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lunch break
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s4499w7417
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t
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2
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7.7
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161
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s4494w7419
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t
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3
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6.5
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171
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s4510w7421
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b
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2
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7.0
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130
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B = boto dolphins, T = tucuxi dolphins, U = unidentified
Total number of botos = 25
Total number of tucuxi = 19
Total number of unidentified = 1
Total number of dolphins = 47
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