Species focus: Fish Flashcards
what does poor husbandry lead to?
poor environmental conditions
increased stress levels which directly affect immunity= more susceptible to a wide range of diseases
Ways to maintain water quality
- maintain correct stocking density
- maintain filtration system
- maintain aeration
- monitor temperature
- regular cleaning and partial water changes
- regular water quality testing
Key points for keeping fish together
- keep only compatible fish together
- quarantine new fish for 4 weeks prior to introducing to existing stock
- provide good quality food.
What water quality components should you test for?
- dissolved gases
- nitrogenous compounds
- temperature
- pH
- Hardness
- Alkalinity
- Salinity
- other solutes
how much oxygen does water hold in comparison to air of the same volume?
5%
what are the oxygen requirements?
varies with species, age., size and health of fish
increases with feeding and stress
most fish require 6mg/l of dissolved oxygen
how is CO2 produced in a fish tank?
respiring fish, bacteria and by plants at night- dissolved highest levels just before dawn.
What is toxic to fish?
ammonia and nitrite
what tyrpes of bacteria are needed to seed a fish tank?
nitromonas - oxidises NH4
nitrobacter - oxidises No2
what factors all depend on temperature
metabolic, feeding and growth rate
what does increased temperature cause?
decreased DO and increased toxicity of ammonia
ideal pH for fish
6-8
what type of water are moist fish kept in?
freshwater
freshwater aquarium management
- bigger tank, away from direct sunlight, draughts and heaters
- lighting- artificial
- aeration
- filtration
pond management
- position- open area, shade, away from trees, level ground
- size- larger better
- filtration
- UV lamps
- pumps
