Laserfiche WebLink
Daily observations <br />' <br /> Each day scheduled for observation was divided into four observation periods. Each, <br /> observation period was approximately six hours duration and was determined by sunrise <br />' and sunset. Based on previous habitat research, the two most important time periods] are <br /> near sunrise and sunset. Time periods were numbered as follows: <br /> • Period 1 - three hours before to three hours after sunrise; <br />' • Period 2 - three hours after sunrise to three hours before sunset; <br /> • Period 3 - three hours before sunset to three hours after sunset; and <br /> • Period 4 - three hours after sunset to three hours before sunrise. <br /> The selected Colorado squawfish was located and tracked for a two hour period. Any <br /> locations where the fish remained for more than 30 minutes were marked, and later' <br />' measured for habitat variables. <br /> RESULTS <br />' Colorado Squawfish <br /> Colorado Squawfish #40:7810 (CS781) <br /> CS781 was captured by electrofishing at RM 94.6 on 25 July 1996. This fish was' <br />' captured about ten feet offshore immediately downstream from a man-made rock <br />---?L <br /> outcropping. CS781 was not located by ground crews again until 11 Sep. 1996 (V? eek 5). <br /> However, the fish was reportedly located by air during each week after it's original <br />' capture. An attempt was made to confirm air locations by ground crews during each <br /> observation week. Attempts by ground crews consisted of a minimum float by canoe <br /> from two miles upstream of the air location to two miles below. Results of location <br />' attempts by ground crews were negative on all occasions until the fish was located from <br /> the air at RM 89.8 by a member of the Miller Ecological Consultants crew. CS79'1 <br /> remained in this same habitat throughout the remainder of the study (Figures 1 and 2). <br /> Immediately after locating CS781 on 11 September 96 a 24 hour observation was <br /> <br />' conducted. The fish appeared to move only slightly during this time (Figure 3). CS781 <br />was located in the exact same position (RM 89.8) during each following observation <br /> week during the study. It is possible that this fish has expelled the transmitter or jis dead. <br />' Yampa River Radio <br />Telemetry Report <br />' Miller Ecological Consultants, Inc. <br />Page 4 <br />January 23, 1997 <br />i