8236

• UCREFRP Catalog Number: 8236
• Author: Douglas, M. E. and P. C. Marsh
• Title: Population and Survival Estimates of Catostomus latipinnis in Northern Grand Canyon, with Distribution and Abundance of Hybrids with Xyrauchen texanus
• USFW Year: 1998
• USFW - Doc Type: Copeia
• Copyright Material: YES

DOUGLAS AND MARSH-GRAND CANYON CATOSTOMIDS 925
APPENDIX. COMPUTATIONAL STATISTICS FROM CJS ANALYSIS OF ADULT Catostomus latipinnis AND Xyrauchen tex-
anus/HYBRIDS. No. = numerical designation for trip; Date (from/to) = sampling periods; Season = sampling
season (V = spring, S = summer, A = autumn, W = winter); Effort = sampling effort in net-hours; NH(I) =
CJS population estimate at time (i), adjusted for effort; SE NH(I) = standard error of nh(i) (not calculated
.. for X. texanus/hybrids).
c. wtipinnis X. t.exanus
\ No. Date (from/to) Season Effort NH(I) SE NH(I) NH (I)
01 01 July-14 July 1991 S 7630 2952 430
02 21 July-03 Aug. 1991 S 10,146 2951 430
03 11 Aug.-23 Aug. 1991 S 12,172 1679 402 08
04 13 Sep.-25 Sep. 1991 A 5188 2015 500 20
05 15 Oct.-24 Oct. 1991 A 5622 2325 488 17
06 07 Nov.-16 Nov. 1991 A 5282 2325 541 22
07 09 Dee.-16 Dee. 1991 W 6375 1642 313
08 08 Jan.-15 Jan. 1992 W 7133 1642 288
09 11 Feb.-19 Feb. 1992 W 5607 1642' 330
10 05 Mar.-13 Mar. 1992 V 6412 1642' 330
11 26 Mar.-03 Apr. 1992 V 9554 1832 271 102
12 20 Apr.-29 Apr. 1992 V 6326 2054 366 22
13 18 May-27 May 1992 V 7990 2736 376
14 15 June-24 June 1992 S 8194 2037 304
15 14 July-23 July 1992 S 7591 2037 318
16 10 Aug.-19 Aug. 1992 S 4862 2697 708 24
17 14 Sep.-23 Sep. 1992 A 7570 3415 453 21
18 12 Oct.-22 Oct. 1992 A 7607 1750' 341
19 09 Nov.-18 Nov. 1992 A 4527 1750' 341
20 10 Feb.-17 Feb. 1993 W'" 8162 1591 260
21 02 Mar.-1O Mar. 1993 V 7846 1591 265 15
22 22 Mar.-31 Mar. 1993 V 8962 1915 276 15
23 12 Apr.-21 Apr. 1993 V 8809 2467 328 29
24 10 May-19 May 1993 V 7052 2674 396 28
25 08June-16June 1993 S 7561 3513 459 45
26 12 July-21 July 1993 S 7735 3841 481
27 10 Aug.-18 Aug. 1993 S 6718 2307' 340 136
28 13 Sep.-22 Sep. 1993 A 8602 2307' 340 26
29 12 Oct.-21 Oct. 1993 A 8199 2307 342 33
30 08 Nov.-17 Nov. 1993 A 9005 2027 283 16
31 06 Dee.-15 Dee. 1993 W 8322 2260 316 24
32 11 Jan.-20 Jan. 1994 W 8517 2615 344 33
33 10 Feb.-19 Feb. 1994 W 7672 2516 357 33
34 15 Mar.-24 Mar. 1994 V 9661 3683 444
35 12 Apr.-21 Apr. 1994 V 8913 4269 473
36 10 May-19 May 1994 V 7920 5214 587
37 14June-23June 1994 S 8143 5214 575 19
38 12 July-21 July 1994 S 8634 3553 420
39 09 Aug.-18 Aug. 1994 S 9162 3248 390 15
40 13 Sep.-22 Sep. 1994 V 9048 3121 380
41 11 Oct.-20 Oct. 1994 V 9158 3322 399
42 01 Nov.-l0 Nov. 1994 V 7442 2115 326 15
43 06 Dee.-15 Dee. 1994 W 10,152 2115 314 15
44 10 Jan.-19 Jan. 1995 W 11,150 2064 377 29
45 07 Feb.-16 Feb. 1995 W 9180 2072' 352 15
46 28 Feb.-09 Mar. 1995 V 12,285 2072' 352
47 21 Mar.30M ar. 1995 V 12,182 2625 616
48 11 Apr.-20 Apr. 1995 V 9292 3862 471
49 26 Apr.-25 May 1995 V 10,095 594 146
50 13 June-27 June 1995 S * * *
* Not calculated.
a Combined with previous trip.
b Dee. I 992/Jan. 1993 not sampled due to inclement weather.