Libro jubilar en honor al Dr. Salvador Contreras Balderas

abundance agua American anal base basin behavior Canyon caudal changes Chihuahua collected Colorado River como Conchos conservation Contreras Creek cual Cyprinodon Deacon dieta distribution Diversion Dixie National Forest dorsal fin drainage endangered estudio et al FAMILIA fauna females flow freshwater fueron Fuerte Gambusia Gilbert gonad habitats head Hubbs interval introduced Jordan length listed lower male March marine mature México Michigan Miller Minckley Mississippi River native fishes natural North Nuevo occur origin peces populations predator present Quail Creek range reach region relative reported Reservoir Salvador sampling Santa spawning species specimens spinedace Springs stream sucker Table Texas tributaries trout Universidad University upper variation Veracruz Virgin River Wash weight woundfin