Nechako White Sturgeon Habitat & Food

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Presentation transcript:

Nechako White Sturgeon Habitat & Food

Sturgeon Life Cycle Adult Spawning Sub-Adult Juvenile Eggs Larvae What are the specific habitat and food needs for each life cycle stage? Adult Spawning Sub-Adult Juvenile Eggs Larvae

Eggs Habitat Food CLEAN gravel and rocks (no silt!). ? Fast flowing water. Relatively deep water (ideal for spawning adults). Water temperature between 14-18°C. Food ?

Eggs Habitat Food CLEAN gravel and rocks (no silt!). Fast flowing water. Relatively deep water (ideal for spawning adults). Water temperature between 14-18°C. Food NONE – they are developing inside the egg.

Sturgeon Life Cycle Adult Spawning Sub-Adult Juvenile Eggs Larvae

Larvae Habitat Food CLEAN gravel and rocks. ? Fast flowing water. Turbid water – murky. They can hide better from predators in murky water and by hiding in the gravel and rocks. Food ?

Larvae Habitat Food CLEAN gravel and rocks. Fast flowing water. Turbid water – murky. They can hide better from predators in murky water and by hiding in the gravel and rocks. Food for the first 12 days – NONE! They feed off yolk sac. After 12 days they eat macro-invertebrates!

Macro: small, but can be seen by the naked eye. Macro-invertebrates Macro: small, but can be seen by the naked eye. Invertebrate: has no backbones but has an exoskeleton (protection on the outside of body).

Sturgeon Life Cycle Adult Spawning Sub-Adult Juvenile Eggs Larvae

Larvae Habitat Food Deep water. ? Slow back eddies. Cool areas. Fast flowing areas. Food ?

Juvenile Habitat Food Deep water. Slow back eddies. Cool areas. Fast flowing areas. Food Benthic invertebrates (benthic means on the bottom). Small fish, such as sculpin, and fish eggs.

Larval and juvenile sturgeon eat invertebrates. The type of invertebrates found in a river depends on the amount of pollution in the water. Here is a scale of invertebrates you find in a healthy creek verses unhealthy creek. mysid Healthy In-between Un-healthy snails Water beetle leech caddis fly Dragonfly

Sturgeon Life Cycle Adult Spawning Sub-Adult Juvenile Eggs Larvae

Adult Habitat Food Deep water. ? Slow back eddies. Cool areas. Fast flowing areas. Turbid water (for spawning). Lakes. Food ?

Adult Habitat Food Deep water. Large fish, such as salmon and trout. Slow back eddies. Cool areas. Fast flowing areas. Turbid water (for spawning). Lakes. Food Large fish, such as salmon and trout.

Hurray!!! What a sturgeon looks like and why You now know: What a sturgeon looks like and why The life cycle of the sturgeon The habitat it needs to survive The food it needs to survive The predators it needs to avoid