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48 <br />MOVIMIENTOS DE TRES PECES EN ARAVAIPA CREEK, ARIZONA. <br />Darrell J. Siebert, Arizona State University. <br />Los movimientos de tres peces, Gila robusta, Catostomus <br />insignis y Pantosteus clarki, estan bajo investigacion <br />en Aravaipa Creek, Arizona, utilizando el metodo de marcar- <br />recapturar. Al capturar los peces, se estan marcados con <br />marcas de ancla "Floy" individualmente numeradas, y devueltos <br />al agua. Se notan sitios de marcar y subsecuentamente, de <br />recapturar. Se estan marcando un rango de tallas de peces <br />entre 6 y 38 cm. Ya se cuenta con un ano de datos. <br />Gila robusta y Catostomus insignis muestran pautas de <br />movimientos similares, ambos mostrando movimiento al dentro <br />del canon abrigado de Aravaipa, tanto de arriba como de abajo. <br />Pantosteus clarki no presenta una pauta fija de movimiento. <br />Los movimientos de esta parecen ser al azar. <br />MOVEMENTS OF THREE FISHES IN ARAVAIPA CREEK, ARIZONA. Darrell J.. <br />Siebert, Arizona State University. <br />Movements of three fishes, Gila robusta, Catostomus insignis, and <br />Pantosteus clarki, are being investigated in Aravaipa Creek, Arizona <br />by a mark-recapture method. Fish are captured, marked with an individ- <br />ually numbered Floy anchor tag, and released. Original capture and <br />subsequent recapture localities are carefully noted. Marked fish range <br />in size from 6 cm to 38 cm. Data collection has been in progress for <br />a year. <br />Gila robusta and Catostomus insignis show similar movement <br />patterns, both species showing a pattern of movement into the sheltered <br />Aravaipa Canyon from upstream and downstream. Pantosteus clarki does <br />not present a clear pattern of movement. Movements of this fish appear <br />to be random.