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Published byConrad Kipling Modified over 10 years ago
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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
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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
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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 ??
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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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