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GOALS and OBJECTIVES

GOALS and OBJECTIVES. BASELINE FOR LONG TERM MONITORING Identify distribution and estimate relative abundances of fish species (Other objectives - no time to discuss) EVALUATE LSSF Identify growth patterns for YOY native fishes and small non-native fishes in backwaters during LSSF

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GOALS and OBJECTIVES

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  1. GOALS and OBJECTIVES • BASELINE FOR LONG TERM MONITORING • Identify distribution and estimate relative abundances of fish species • (Other objectives - no time to discuss) • EVALUATE LSSF • Identify growth patterns for YOY native fishes and small non-native fishes in backwaters during LSSF • Evaluate changes in relative abundance

  2. ANTICIPATED EFFECTS OF LSSF • MAIN CHANNEL TEMPERATURE INCREASES • NEAR SHORE TEMPERATURE INCREASES • INCREASED STABILITY AND TEMPERATURE OF SHORELINE HABITATS (Backwaters) • ENHANCED SPAWNING FOR NATIVE FISHES • INCREASED GROWTH AND SURVIVAL FOR NATIVE FISHES • INCREASED GROWTH, SURVIVAL AND EXPANDED DISTRIBUTION OF WARM WATER NON-NATIVE FISHES

  3. LSSF : CONCLUSIONS • MAIN CHANNEL AND BACKWATER TEMPERATURES INCREASED • NO IMMEDIATE INCREASE OR CHANGE IN DISTRIBUTION OF ADULT NATIVES OR NON-NATIVES • NO OBSERVABLE POSITIVE EFFECT ON GROWTH OF YOY FISH • ENHANCED SPAWNING FOR NATIVE FISHES • ENHANCED SPAWNING FOR FATHEAD MINNOW • SIGNIFICANT INCREASE IN ABUNDANCE OF FMS, BHS, SPD, AND FHM (NOT HBC) • FALL SPIKE; DISADVANTAGED FHM MORE THAN NATIVES • INCREASED SURVIVAL ??

  4. LSSF: BOTTOM LINE • BENEFIT TO HBC MINIMAL • BENEFIT TO NATIVE SUCKERS ONLY IF YEAR CLASS SUCCESSFULLY RECRUITS - WON’T KNOW FOR 3-4 YEARS • BENEFIT TO NON-NATIVES (FHM) • WAS IT STEADY FLOWS OR TEMPERATURES, OR BOTH ? (SAME EFFECTS WITH WARMER TEMPS AND FLUCTUATING FLOWS?) • REPEATABLE?

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