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TRANSPORTING FISH. TRANSPORT MORTALITY. Poor water quality Water & ion imbalances Stress-induced immunosuppression. WATER QUALITY. Temperature Oxygen pH/ammonia/carbon dioxide Total dissolved solids. Metabolic Activity. Dissolved Oxygen Saturation. Dissolved Oxygen and Salinity. - PowerPoint PPT Presentation
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TRANSPORTING FISHTRANSPORTING FISH
TRANSPORT MORTALITYTRANSPORT MORTALITY
• Poor water qualityPoor water quality• Water & ion imbalancesWater & ion imbalances• Stress-induced immunosuppressionStress-induced immunosuppression
WATER QUALITYWATER QUALITY
• TemperatureTemperature• OxygenOxygen• pH/ammonia/carbon dioxidepH/ammonia/carbon dioxide• Total dissolved solidsTotal dissolved solids
Metabolic ActivityMetabolic Activity
DISSOLVED OXYGEN SATURATIONy = 0.0044x2 -
0.3532x + 14.113r2 = 0.999
5
10
15
0 10 20 30 40Temperature (C)
DO
(mg/
L)
FW760 mm Hg
Dissolved Oxygen SaturationDissolved Oxygen Saturation
DISSOLVED OXYGEN AND SALINITYy = -0.0709x +
7.5818r2 = 0.9869
66.5
77.5
8
0 5 10 15 20Salinity (g/L)
DO
(mg/
L)
30 C760 mm Hg
Dissolved Oxygen and SalinityDissolved Oxygen and Salinity
Oxygen ConsumptionOxygen Consumption
NH3 NH4+
Ammonia
Un-ionized
Ammonium
Ionized
Low pH
Low Temp
High pH
High Temp
Ammonia RelationshipsAmmonia Relationships
Ammonia TransportAmmonia Transport Across Gill Across Gill
0 g/L 35 g/LFreshwater Seawater
Iso-osmoticIso-osmotic
10-12 g/L
Fish pump ions in and do not drink
Fish pump ions out and drink
Salinity
Water and Mineral TransportWater and Mineral Transport
ALKALINITY AND pH
6
7
8
9
0 10 20Carbon Dioxide (mg/L)
pH
100 mg/L
25 mg/L
Alkalinity and pHAlkalinity and pH
Disease Prevention and Disease Prevention and OutbreaksOutbreaks
Stress and Stress and DiseaseDiseaseOutbreaksOutbreaks
RULES OF THUMBRULES OF THUMB• Reduce the number of stressors (Know what you are doing)Reduce the number of stressors (Know what you are doing)
• Reduce severity of stressors (Don’t knock your fish around)Reduce severity of stressors (Don’t knock your fish around)
• Minimize duration of stressors (Don’t haul fish around the USA!)Minimize duration of stressors (Don’t haul fish around the USA!)
• Minimize plasma ion disturbances (Use salt)Minimize plasma ion disturbances (Use salt)
• Minimize increases in metabolic rate (Correct temp., etc.)Minimize increases in metabolic rate (Correct temp., etc.)
Knotless NettingKnotless Netting
Knotted NettingKnotted Netting
Fish loaded into bag and ready for oxygen “top-off.”
Oxygen injection into bagged fish...will keep up to 24 hrs.(If fish are small and low density!!)
Bagged fish loaded into box for shipping.
Case Study: How to Move Red Case Study: How to Move Red Drum…or How NOT too!Drum…or How NOT too!
Healthy? Much better over here!
Everyone’s here…let’s get started!
7:00 AM
“101, 102…”
“Gee…This is time consuming!”
“I’m hungry, anyone bring donuts??”
“Well, he said, then she told him to….”
“Was that 203, 204, 205?”
“Whose counting these???” 8:02 AM
Several hours later…still at it!
10:15 AM
“Did anyone calibrate the scale this AM?”
“Don’t look at me, I thought Becky was supposed to do it?”
11:07 AM
“Who wants to break for lunch??”
12:30 PM
“Did anyone check the batteries on this thing?”
2:00 PM
Striped BassStriped Bass
Fish Pump PhotoFish Pump Photo
Fish Pump DiagramFish Pump Diagram
Loading FishLoading Fish