Macro In Water
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Transcript of Macro In Water
What Lives in Our Water?
Fish
Darter
MinnowSculpin
Bluegill
Amphibians
Leopard Frog
Tadpole
Bull Frog and Green Grog
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Amphibians
Mudpuppy – retains gills throughout life
Salamander larva – loses its gills to live on land
Reptiles
Newly hatched Snapping turtle
Red-eared slider
Adult Snapper
Reptiles
Queen Snake – common in our area - non-venomous
Northern Water Snake – aggressive but non-venomous
None of the previous animals are used to indicate the quality of water in an area – they are nice to find, but are often the first to go if the water is not good.
Indicators of Water Quality
Macroinvertebrates – without backbones, large enough to be seen
Many of the macroinvertebrates are insect larvae that spend part of their life cycle as aquatic organisms (note the gills on the pictures)
The macroinvertebrates are divided into groups based on their tolerance of poor water conditions.
Group 1 – indicators of good water quality. These have low tolerance of pollutants.
Group 2 – indicators of fair water quality. These have moderate tolerance of pollutants.
Group 3 – indicators of poor water quality. These have high tolerance of pollutants.
Stonefly nymph
Stonefly adult
1Food for many fish
Mayfly adult
Mayfly nymph
1Food for many fish
Dobsonfly adult
1
Dobsonfly larva
Food for many fish – good bait too!
Caddisfly adult
Caddisfly larva
1Found in little cases of sand and sticks on the bottom of rocks.
Water Penny larva
1Found on the bottom of rocks.
Riffle Beetle adults
1These are not the water striders that might also be found.
Damselfly larvae Damselfly adult
2Adults hold wings together when resting.
Dragonfly nymph
Dragonfly adult
2
Larvae are voracious predators – often catching fish and tadpoles!
Adults hold wings parallel when resting.
Crane Fly larvae
Crane Fly adult
2
Cranefly larvae
Cranefly adult
Might also find horsefly larvae – similar but larger!
These are not giant mosquitoes! They are harmless and lousy flyers.
Beetle larvae
2
Crayfish
2Crustacean – shell on the outside.
Scuds (side swimmers)
2Crustacean – shell on the outside. Look like tiny shrimp
Sow Bugs (isopods)
2Crustacean – related to the “roly-polies” found under rocks on land.
Clams / mussels
2
Leech
3Segmented worms – only some are blood suckers. Good bait too!
Midge larvae
3This insect larva lives in the silt and is often called a “blood worm” due to its red color.
Black Fly larvae
3This insect larva has a suction cup on one end to ancor it to rocks.
1
3
Right hand snails – have gills and need water with higher oxygen levels
Left hand snails – have lungs and breathe air - can live in polluted water