2013 Envirothon
Incomplete life cycle – 4
damselfly
dragonfly
leech
water strider
Life Cycle
Complete life cycle
mosquito:
life cycle
eggs inserted into tissues of plants growing near water
damselfly:
egg deposit
adult stage: after several days without feeding, climb out of water and shed skin
damselfly:
adult stage
diet: zooplankton, mayflies, damselflies, any prey that can be eaten
damselfly:
diet
predators:game fish, predaceous water insects
damselfly:
predators
preferred habitat:still waters, ponds, lakes, streams, and rivers
damselfly:
preferred habitat
movement and breathing: weak swimmers, wave abdomen side to side, closed system, spread gills, diffusion across skin
damselfly:
movement and breathing
water indicator quality 2 (3 species)
damselfly
dragonfly
water strider:
Water Indicator Quality
eggs deposited on leaves/stems underwater; sometimes in shallow water
dragonfly:
egg deposit
larvae/nymph stage: nymph hatches and molts 12 times
dragonfly:
larvae/nymph stage
adult stage: last molt occurs with the head out of water; adult flies away
dragonfly:
adult stage
diet: insects and larvae, dragonfly nymphs, worms, small crustaceans; hunts movement and will stalk prey
dragonfly:
diet
predators: gamegish, frogs, birds, beetles, dragonflies
dragonfly:
predators
preferred habitat: ponds, marshes, lake edges, shallow streams, slow moving water
dragonfly:
preferred habitat
movement and breathing: climb and crawl on bottom; some burrow; can propel by sending water out their rear (rectal chamber)
dragonfly:
movement and breathing
complete life cycle (1)
mosquito:
life cycle
eggs deposited individually or in rafts in water or on land that will be flooded
mosquito:
egg deposit
larvae/nymph stage: larvae live in water and shed 4 times (4-14 days)
mosquito:
larvae/nymph stage
pupa stage: sealed cocoon fixed to an object
mosquito:
pupa stage
diet: collectors-filterers: algae, bacteria, fungi, and protozoa; some feed on mosquito larvae
mosquito:
diet
preferred habitat: still water
mosquito:
preferred habitat
movement and breathing: both larvae and pupae swim by bending the body; siphons and resp. horns collect air from water
mosquito:
movement and breathing
eggs: ring-like cocoon around eggs on stream bottom, or carried in sac on underside of female
leech:
egg deposit
larvae/nymph stage: young hatch and feed on female’s mucus
leech:
larvae/nymph stage
diet: through suckers, scavenge/prey on insects, mollucks, and worms; blood suckers to fish, amphibians, reptiles and water fowl
leech:
diet
predators: fish, predaceous water insects
leech:
predators
preferred habitat: bottom dweller among rocks and leaves; attach to animals; prefer stagnant water
leech:
preferred habitat
movement and breathing: suckers, slide, swim; open breathing system, breathe through skin; will move in waves to increase oxygen
leech:
movement and breathing
water quality indicator 3 (1)
leech:
water quality indicator
egg deposit: loose, underwater, attached to solid objects
water strider:
egg deposit
adult stage: repeat cycle over winter
water strider:
adult stage
diet: land/aquatic plants (both living and dead)
water strider:
diet
predators: gamefish, predaceous water insects
water strider:
predators
movement and breathing: skate on surface; spiracles (openings) on side of body; will trap air in hairs to breathe while diving
water strider:
movement and breathing
egg deposit: egg cases deposited in June, carried by female
fishing spider:
egg deposit
larvae/nymph stage: 1000 young hatch and are guarded by female in the nursery web
fishing spider:
larvae/nymph stage
adult stage: hibernate as immature adults under stones, in trees and human structures
fishing spider:
adult stage
preferred habitat: usually wooded areas, some near water, some far
fishing spider:
preferred habitat
movement and breathing: walk on surface of water, more accurately a tree dweller
fishing spider:
movement and breathing
diet:small fishes and aquatic insects
fishing spider:
diet
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