WLF 448: Fish & Wildlife Population Ecology
Field Exercise #1, Fall 1996

Summary of Capture Data: Eldorado Gulch (9/13/96)

Air temp - 19C
Water temp - 13C

Data pooled for two 30 meter reaches

Average width for 60 m reach = 1.33 m
Average midstream depth = 9.8 cm

Tailed Frogs - Adults & Juveniles (60 meter reach)

Number(recap) Stage Sex Length (mm) Weight (g)
1 A F 43 ---
2 J F 21 ---
3 J M 24 ---

Tailed Frogs - tadpoles (60 meter reach)

# Length (mm) # Length (mm)
1 55 21 31
2 54 22 31
3 53 23 31
4 48 24 29
5 42 25 22
6 39 . .
7 38 . .
8 37 . .
9 36 . .
10 36 . .
11 36 . .
12 35 . .
13 35 . .
14 34 . .
15 34 . .
16 34 . .
17 34 . .
18 34 . .
19 33 . .
20 32 . .

Idaho Giant Salamanders - 60-meter reach

Number (recap) Stage Total length (mm) Snout-vent length (mm) Weight (g)
1 (r) A* 155 89 31.5
2 L 171 113 42.0
3 L 153 90 33.5
4 L 140 78 26.5
5 L 146 73 26.5
6 L 100 50 16.5
7 L 103 60 19.0
8 L 117 63 19.5

First 5-meter reach

mean width of 1.3 m
mean midstream depth = 9 cm

Tailed Frogs - Adults

Number(recap) Stage Sex Length (mm) Weight (g)
1 A M 32 .

Tailed Frogs - tadpoles

# Length (mm) # Length (mm)
1 52 31 35
2 52 32 35
3 49 33 34
4 47 34 .
5 42 35 .
6 42 36 .
7 41 37 .
8 41 38 .
9 40 39 .
10 40 40 .
11 40 41 .
12 40 42 .
13 40 43 .
14 40 44 .
15 40 45 .
16 40 46 .
17 39 47 .
18 39 48 .
19 39 49 .
20 39 50 .
21 38 51 .
22 38 52 .
23 37 53 .
24 37 54 .
25 37 55 .
26 37 56 .
27 37 57 .
28 36 58 .
29 36 59 .
30 36 60 .

2nd 5-m reach

4.0 meters wide, 3 cm deep

Tailed frogs - no adults capture

Tailed frogs -tadpoles

# Length (mm) # Length (mm) # #
1 53 31 39 61 21
2 50 32 39 62 21
3 43 33 38 63 21
4 43 34 38 64 21
5 42 35 38 65 21
6 42 36 38 66 21
7 42 37 37 67 21
8 42 38 37 68 21
9 42 39 37 69 21
10 42 40 37 70 20
11 42 41 37 71 20
12 42 42 37 72 20
13 42 43 37 73 20
14 41 44 36 74 20
15 41 45 35 75 19
16 41 46 34 76 .
17 40 47 30 77 .
18 40 48 23 78 .
19 40 49 22 79 .
20 40 50 22 80 .
21 40 51 22 81 .
22 40 52 22 82 .
23 40 53 22 83 .
24 40 54 21 84 .
25 39 55 21 85 .
26 39 56 21 86 .
27 39 57 21 87 .
28 39 58 21 88 .
29 39 59 21 89 .
30 39 60 21 90 .

Idaho Giant Salamanders Second 5-meter reach

Number(recap) Stage Total length (mm) Snout-vent length (mm) Weight (g)
1 L 133 70 19.5
2 L 70 38 7.0

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Revised: 10 June 1998