Laserfiche WebLink
1 <br /> <br />1 <br /> <br /> <br /> <br />1 <br /> <br /> <br /> <br />1 <br /> <br /> <br /> <br />1 <br /> <br /> <br />discharge. Valdez and Ryel (1995) also found strong year-class strength of <br />humpback chub in the Grand Canyon to be correlated with flooding events. Due <br />to conditions of high turbidity and high flows during spawning, wild Gila <br />spawning, as yet, has not been observed in riverine conditions. However, <br />based on available knowledge, all Gila spawn during late spring on the <br />descending limb of the hydrograph. Jonez and Sumner (1954) observed bonytail <br />spawning in Lake Mohave in May of 1954. They reported broadcast spawning of <br />females, escorted by three to five males, over a gravel shelf. Captive <br />bonytail have also spawned successfully in earthen ponds at Dexter National <br />Fish Hatchery, New Mexico. <br />Marsh (1985) noted that newly hatched bonytail had highest larval <br />survival at temperatures of 15 and 20°C (32%) with no survival at 5, 10 and <br />30°C. After hatching, larval bonytail swam into the current before adhering <br />to incubation chamber sides. <br />13 <br />