7055 - Laserfiche WebLink

Home Browse Search

Table 3. Data for Colorado squawfish implanted with radio transmitters with a theoretical 180-day battery life, Colorado River, spring 1984. SUBSEQUENT TOTAL RELEASE RELEASE CONTACTS MAX IM..M FISH LENGTH WEIGHT SITE DATE NLMBER DURATION DISPLACEMENT NO. (IIIR) (g) (RM) (month/day) (DAYS) (MILES)c 44 465 610 75 5/10 0 0 45 485 850 112 5/3 6 57 3 46 705 3,340 164 5/25 13 152 37 47 515 1,000 75 5/10 5 55 0 48a 556 1,230 164 5/29 0 0 49 446 660 58 5/24 3 37 0 50 530 1,120 64 5/16 12 148 1 51 444 600 64 5/24 0 0 52 681 2,840 64 5/16 2 120 28 53 449 600 90 5/3 3 141 29 54 464 700 75 5/10 0 0 55 544 1,000 75 5/10 2 35 10 56 520 1,043 198b 4/9 4 7 24 57 531 1,542 197b 4/12 3 6 0 58 630 2,200 198b 4/17 4 2 8 59 583 1,740 184b 4/25 1 2 0 60 555 1,420 177 5/9 0 0 61 506 840 75 5/10 0 0 a This is the same fish as Number 28, Table 2. It was recaptured and b retagged, spring 1984. Upper lake Powell, measured upstream from Lee Ferry, Arizona. c Negative values indicate movement downstream from the release site. one of the two fish tagged in the Grand Valley area (No. 46) remained there during early summer but began a slow movement downstream to Black Rocks near the end of July. Although this fish occupied suspected spawning habitat between RM 163 and RM 155 during late July and early August, our sampling with trammel nets in that area did not result in the capture of additional adult Colorado squawfish. This does not preclude the possibility that the fish spawned in that area, however. Fish No. 46 was in the Black Rocks area by early fall. Movement of conventionally taqqed Colorado squawfish Twenty-one wild Colorado squawfish that had earlier been tagged with conventional (Carlin) tags were recaptured from the Colorado River during this or previous studies (Valdez et al. 1982a,b). Two of these fish were recaptured twice. Time between capture dates ranged from 1 day to 3.5 years; 50s of the 13 I I I I I I I I I I I I I I I I I I I