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  • The wind is an ever present force in the Mojave Desert.  Here, a small memorial endures another windy evening as the sun sets in the distant mountains surrounding Lake Mohave.
    DSC_0011.tif
  • Shoreline of the lower basin on Lake Mohave where larval razorback suckers are collected each spring and then transported to a hatchery where they are raised for up to three years prior to being released back into the wild.
    _APK2802.tif
  • Looking west across Cottonwood Basin, the widest portion of Lake Mohave, Arizona/Nevada.  The shoreline of the basin continues to provide wild spawned razorback sucker larvae, which supports recovery efforts of the species.
    lake mohave sunset_DSC_0375.tif
  • Desert sunflowers and desert lillies bloom along the shore of Lake Mohave.
    lake mohave_DSC_0139.tif
  • A perfectly still morning on Lake Mohave.
    lake mohave_DSC_0103.tif
  • Lake Mohave, Arizona/Nevada.
    DSC_0127.tif
  • Fish biologist check a trammel net for razorback sucker during bi-annual native fish surveys of Lake Mohave.
    lake mohave_DSC_0349.tif
  • Spring grasses growing along the Lake Mohave shoreline dry in the late May sunshine.
    lake mohave_APK2382.tif
  • Springtime wildflower bloom on Lake Mohave, Arizona/Nevada.
    lake mohave_DSC_0205.tif
  • Wildflower bloom near Cottonwood Cove on Lake Mohave during spring 2009.
    lake mohave_DSC_0277.tif
  • The southern arm of the Milky Way rises above a hill covered in creosote bushes on the shore of Lake Mohave, Arizona.
    lake mohave_APK2348.tif
  • Sand dunes cover hillside above Lake Mohave at sunset.
    lake mohave_DSC_0067.tif
  • Phacelia bloom on a hillside above Lake Mohave.
    lake mohave_DSC_0025.tif
  • Razorback sucker larvae, collected from various locations around Lake Mohave in order to retain the genetic divesity of the parental population, are reared in aquaria at Willow Beach National Fish Hatchery.  After a few months, the fish will be transfered to heated outdoor raceways where they will grow for three years before being repatriated into Lake Mohave.
    _APK3291.tif
  • Razorback sucker larvae, collected from various locations around Lake Mohave in order to retain the genetic divesity of the parental population, are reared in aquaria at Willow Beach National Fish Hatchery.  After a few months, the fish will be transfered to heated outdoor raceways where they will grow for three years before being repatriated into Lake Mohave.
    _APK3350.tif
  • Cold water released from Hoover Dam flows downstream through Black Canyon filling Lake Mohave.  Striped bass, which were incidentally introduced to Lake Mohave via the spillway tunnels of the dam during the 1980's, have been detrimental to the recovery of razorback sucker and other native fishes.
    _APK1383.tif
  • Bighorn sheep in Black Canyon of Lake Mohave.
    _APK6671.tif
  • Desert Lilies emerge from a sand dune near Airport Cove on Lake Mohave, Arizona/Nevada.
    desert lillies_DSC_0216.tif
  • A large group of common carp are fed by two boys at a boat slip on Lake Mohave.
    APK_056.tif
  • A large group of non-native common carp wait to be fed by tourists at a boat dock on Lake Mohave.  After their introduction in the 1880's, carp  quickly established in the lower Colorado River and are one of the most commonly encountered fish today.
    APK_050.tif
  • Black Canyon on Lake Mohave, Arizona/Nevada (Lake Mead National Recreation Area).
    _APK3137.tif
  • Kayakers float down the Colorado River through Black Canyon on Lake Mohave (Lake Mead National Recreation Area).
    _APK3070.tif
  • The Mike O'Callaghan-Pat Tillman Memorial Bridge spans Black Canyon near Hoover Dam on Lake Mohave (Lake Mead National Recreation Area).
    _APK1373.tif
  • Biologist check trammel nets for razorback sucker during bi-annual surveys of Lake Mohave.
    DSC_0291.tif
  • Trout anglers wait for the arrival of the hatchery stocking truck along the shore of Willow Beach, where tens of thousands of nonnative rainbow trout are stocked anually.  The fishermen now have a formal competitor;  the incidental introduction of striped bass into Lake Mohave during the 1980s cased the blue ribbon trout fishery to crash due to intense feeding pressure.  Striped bass have additionally decimated native fish populations in the reservoir.
    _APK1928.tif
  • Trout anglers fish next to the hatchery stocking truck along the shore of Willow Beach; where tens of thousands of nonnative rainbow trout are stocked anually.; The anglers now have a formal competitor; the incidental introduction of striped bass into Lake Mohave during the 1980s cased the blue ribbon trout fishery to crash due to intense feeding pressure. Striped bass have additionally decimated native fish populations in the reservoir.
    _APK1944.tif
  • Biologist check trammel nets for razorback sucker during bi-annual surveys of Lake Mohave.
    DSC_0274.tif
  • Biologists use underwater lights to attract, then capture endangered fish larvae along the shore of Lake Mohave.
    _APK3740.tif
  • The first rays of sunlight appear behind Davis Mountain along the shore of Lake Mohave.
    davis mountain.tif
  • A spearfisherman with displays a striped bass captured in Black Canyon on Lake Mohave, Arizona/Nevada.
    _APK6452.tif
  • Spearfisherman with a striped bass in Black Canyon on Lake Mohave, Arizona/Nevada.
    _APK6401.tif
  • Warm water flows through the steep walls of Boyscout Canyon at Lake Mohave.
    _APK9303.tif
  • A spearfisherman displays a striped bass he captured in Black Canyon at Lake Mohave.
    _APK6401_pano.tif
  • A razorback sucker gets released into Lake Mohave after being caught during a routine monitoring survey.
    DSC_0269.tif
  • Biologists wrap up a day of sampling on Lake Mohave during the razorback sucker roundup, a multi-agency conservation effort that works towards recovering razorback sucker from the endangered species list.
    DSC_0354.tif
  • Biologist check trammel nets for razorback sucker during bi-annual surveys of Lake Mohave.
    DSC_0295.tif
  • A multi-agency group of biologist go over pre-flight instructions in preparation for flying the perimiter of Lake Mohave in search of spawning groups of razorback sucker.  The information is relayed to biologist on the water who will collect wild spawned larvae and transport tens of thousands of the small fish to Willow Beach National Fish Hatchery.
    _APK2627.tif
  • Kayakers congregate at Ringbolt Rapids on the Colorado River in Black Canyon (Lake Mead National Recreation Area).  One of the area's numerous natural hot springs can be found a short hike up the wash.
    _APK3114.tif
  • The sun rises over the Black Mountains along the Arizona shore of Lake Mohave.
    lake mohave_mt. perkins_sunrise.tif
  • A razorback sucker gets released into Lake Mohave after being caught during a routine monitoring survey.
    apk_lake mohave_razorback release.tif
  • Late winter rains prompted an array of colorful wildflowers, such as these desert sunflowers, to emerge in the washes surrounding Lake Mohave during spring 2009.
    lake mohave_desert sunflowers_DSC_01...tif
  • Light from the full moon illuminates a bighorn sheep skull and Black Canyon on Lake Mohave. The white bathtub ring on the rocks is a visible reminder of the regulated reality of the lower Colorado River downstream of Hoover Dam.
    lake mohave_black canyon_DSC_0286.tif
  • A kayaker paddles his boat into the upstream portion of Lake Mohave which is bound by the rugged walls of Black Canyon (Lake Mead National Recreation Area).  Numerous hot springs can be found in the area.
    lake mohave_DSC_0269.tif
  • Lake Mohave is a narrow "run of the river" reservoir whose function is to ensure irrigation water reaches downstream reservoirs which supply the needs of farmers and cities in California and Arizona.  The reservoir also contains one of the largest and most genetically diverse populations of the endangered razorback sucker.
    lake mohave_DSC_0062.tif
  • Early morning view of the Colorado River winding past Willow Beach in Black Canyon on Lake Mohave, Arizona/Nevada (Lake Mead National Recreation Area).
    lake mohave_10-7-06 .tif
  • A flock of American Avocets takes flight near Chalk Cliffs in Black Canyon on Lake Mohave, Arizona/Nevada.
    lake mohave_american avocets.tif
  • Daylight breaks through the clouds on a stormy November morning on Lake Mohave.
    lake mohave sunrise II.tif
  • A biologist grills dinner over an evening campfire during a week of conducting population surveys of razorback sucker on Lake Mohave.
    lake mohave_DSC_0076.tif
  • Spring bloom of wildflowers along the shore of Lake Mohave.
    lake mohave_DSC_0113.tif
  • Composite of Black Canyon on Lake Mohave.
    lake mohave_black canyon.tif
  • The setting moon casts light across a late night sky above Lake Mohave.
    lake mohave_I_24.tif
  • Willow Beach National Fish Hatchery produces and stocks hundreds of thousands of nonnative rainbow trout into Black Canyon in Lake Mohave, most of which are consumed by striped bass.
    lake mohave_11-27-06.tif
  • A December full moon sets behind the Nevada shore of Lake Mohave as the rising sun paints the peaks of distant mountains.
    lake mohave_APK0783.tif
  • On of few remaining wild razorback suckers captured during a population census on Lake Mohave, Arizona/Nevada.
    lake mohave_DSC_0262.tif
  • A car washed down the boat ramp during a flash flood in October 2006 came to rest feet from the river's edge.   The National Park Service has "re-engineered" the wash above Willow Beach to prevent potential disasters such as this from occurring.  No major flash flood has since tested the unproven repairs.
    Willow Beach Flood_44.tif
  • Cars are burried in debris from flash flood which occurred in October 2006.  The National Park Service has "re-engineered" the wash above Willow Beach to prevent potential disasters such as this from occurring.  No major flash flood has since tested the unproven repairs.
    Willow Beach Flood_30.tif
  • A short hike up Boy Scout Canyon from the Colorado River downstream of Hoover Dam reveals an easily accessed hot spring-fed creek.
    _APK4225.tif
  • The Milky Way splits the night sky above Willow Beach National Fish Hatchery where thousands of endangered razorback sucker are reared.
    _APK4966.tif
  • Big Horn Canyon is one of few places in the United States where endangered Relict Leopard Frogs (right) breed.
    relict leopard frog.tif
  • A lone nettle bush blooms high above the Colorado River as it cuts its way though the rocky confines of Black Canyon.
    _APK3896.tif
  • Boyscout Canyon next to the Colorado River
    _APK9257.tif
  • A hot spring gushes from a wall in Black Canyon along the banks of the Colorado River.  A colorful mixture of cyanobacteria thrive on the rocks below the spring.
    _APK2791.tif
  • A large group of fisherman swarm around a trout stocking truck with the hopes of landing their limit of hatchery reared fish.  Every Friday throughout the year, Willow Beach National Fish Hatchery releases thousands of non-native rainbow trout into the Colorado River and the normally quiet shores of Willow Beach becomes packed with hopeful anglers.
    _APK6774.tif
  • Hot Spring Canyon (right in photo) emerges as a dry wash into the Colorado River within Black Canyon.  A brief hike up the wash reveals a small flowing stream which is home to Red Spotted Toads and Relict Leopard Frogs, one of the rarest species of frogs in the United States.
    _APK3732.tif
  • It's not snow.  A Double-Crested Cormorant tends to its nest among the colony's excrement high on a cliff face above the Colorado River below Hoover Dam.
    _APK2718.tif
  • Black Canyon, Arizona/Nevada.
    lake mohave_DSC_0219.tif
  • A campfire provides warmth on a cold winter evening during the third year of research on Lake Mohave.  The goal of the work was to determine how long aldult razorback sucker survive after being repatriated back into Lake Mohave.
    DSC_0025.tif
  • Black Canyon on Lake Mohave, Arizona/Nevada (Lake Mead National Recreation Area).
    _APK3110.tif
  • Black Canyon on Lake Mohave, Arizona/Nevada (Lake Mead National Recreation Area).
    _APK3126.tif
  • Spearfisherman in Black Canyon, Lake Mohave, Arizona/Nevada.
    _APK6442.tif
  • Dusk at Hoover Dam on the Colorado River, Arizona/Nevada.  Hoover Dam forms the upstream terminus of Lake Mohave.  The cold water releases that flow from the dam enable nonnative rainbow trout to be stocked in the upper reaches of the reservoir.
    hoover dam_ii.tif
  • Newly born bighorn sheep are active just minutes after birth along the canyon walls of Lake Mohave.
    _APK9228.tif
  • A composite image of Yuma Cove backwater (right), one of few locations on Lake Mohave where razorback sucker recruitment occurrs annually.  The backwater is protected from an intruding fauna of predatory fish in the reservoir (left) by a narrow gravel beach.
    yuma cove backwater.tif
  • River water is pumped into cement raceways which house thousands of endangered razorback sucker at Willow Beach National Fish Hatchery. The rearing process includes treating fish with chemicals to ward off parasites and disease.
    lake mohave_DSC_0119.tif
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