Aussie Freshwater Fishes Flashcards
What rivers can the lungfish be naturally found
Burnett and Mary rivers
Lungfish shelter in _____ habitats and rely on _____ pools for breeding and feeding
complex
shallow vegetated pools
T/F: most freshwater fish spp have closest relatives that are marine
True
Describe the conservation status of lungfish and why it is so in respect to human intervention and lungfish morphological/physical/behavioural tendencies
Vulnerable
- rivers subject to damming
- restricted travel for mating by dams
- larvae are poor swimmers
- fish don’t look for new breeding grounds
- if habitat disturbed, eggs will not be laid
Which fish breeds at sea and matures in freshwater? (tropical)
Barramundi (lates calcarifer)
Which organism lies in the brisbane river?
Bullshark
-travels from sea to freshwater (juveniles in freshwater)
What does hypoxia mean?
low to no oxygen content in water
lungfish then breath air in this
In desert fish, what does reproduction seem to link to
flooding
What is special about the adaptations of fish in respect to desert water holes (example)
fish must be able to adapt to changing and extreme salinities
-the Desert Goby
Which fish is present in every single aquatic habitat in aussie?
The spangled Perch
4 Challenges facing freshwater fishes
Barriers to movement (dams)
Lack of environmental flows
Habitat modification
Invasive spacies
What is “environmental flow” ?
quantity, timing, and quality of water flows to sustain a stable ecosystem for the surrounding organisms that depend on it
