Miderm 4-6 Flashcards
Define migration
A fish or group of fish moving to fufill some purpose or respond to environmental stimuli
Predictable
Uniformly
Temperature
Time of day
Unpredictable
Not uniform
Predators
Human disturbances
Social interaction
Spawning
Finding food
Anadromous
From salt to fresh
Salmon
Catadromous
From fresh to salt
Eel
Example of a fish
Striped bass
Move location based on temp
Cycle ensuring for no abundance of fish
Impacting and adapting to multiple habitats
Effects/importance
Habitats constantly are changing
Aeromonas
All species of fish are susceptible, can be passed on to other vertebrate species
Treated w/ antibiotics
Enteric septicemia (ESC)
30% of all catfish disease cases, most important disease in catfish industry
Antibiotics
Channel catfish virus (CCV)
Effects catfish fingerlings
No treatment
Columnaris
Second leading cause of mortality in catfish industry, bacteria appear in stacks
Antiniotics
Proliferative gill disease
Hamburger gill, gill filaments rupture
No treatment
Saprolegniasis (winter fungus)
Occurs when water temp drops below 59° F, brown fungal growth, reduces immunity and mucus production
Antibiotics
Grubs/trematodes
Usually does not result in mortality, ruins marketable meat, can live on skin, gills or muscle
No treatment
Ich
White spot disease, looks like fish sprinkled with salt
Uv sterilization
Brown blood disease (BBD)
Caused by high nitrite in water, changes hemoglobin in blood to methemoglobin, loses oxygen carrying ability, fish gasping common
Chlorides
Whirling disease
effects mainly salmonids, especially less than 6 months old, attacks cartilage in fishes causing deformities in spine jaw and head, fish chase their tails
No treatment only prevention
Marine ich
White spots appearing on marine fish, various life cycle stages
Uv sterilization
Vibrio infections
Mainly occurs in marine and estuarine environments, commonly cause illness in humans from contaminated shellfish
Antibiotics
Furunculosis
Effects large amounts of trout hatcheries in North America, genus of aeromonas bacteria, not typically seen in young fish
Antibiotics
Safe thickness for ice fishing
4in walking
8in atv
12in vehicle
Water homoginization
Water temp is all the same at 39.2°F
Thermoregulation
Fish metabolism slows they eat less and change location to get desired temp for body
Thermal breadth
Temp range a fish is comfortable in
