The Life Cycle of Snails, Semi Slugs and Slugs Invertebrates: Animals without backbones 99% of...
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Transcript of The Life Cycle of Snails, Semi Slugs and Slugs Invertebrates: Animals without backbones 99% of...
The Life Cycle of The Life Cycle of Snails, Semi Slugs Snails, Semi Slugs
and Slugsand SlugsInvertebrates: Animals without backbonesInvertebrates: Animals without backbones
99% of Biodiversity99% of Biodiversity
Lorelle Holcroft and Dr John StanisicLorelle Holcroft and Dr John Stanisic
Adult Snail- often their shell now has a lip]
Snails lay eggs
Snail babies hatch
Snails grow into sub-adults
The Life Cycle of the Snail
Adult Slug
Slugs lay eggs
Snail babies hatch
Slugs grow into sub-adults
The Life Cycle of the Slug
Growing UpGrowing Up
Snails take about two years to be mature for reproduction
Snails spend many hours courting before they mate. They twist themselves around each other and cover themselves in frothy slime..
Snails may lay up to 85 Snails may lay up to 85 eggseggs
Snails lay eggs most often during the warm and damp weather. It can be as often as once a month or every 6 weeks.
Laying EggsLaying Eggs
Each snail will go search for a soft ground to dig and lay its eggs. The snail lay its eggs in a hole in the soil or leaf litter.
Each snail can lay an average of 85 eggs
They hatch in 2 to 4 weeks, depending on the temperature and moisture of the soil
When they When they hatch…hatch…
The first thing that a newly hatched snail does is to find food.
It will eat whatever that is left of its eggshell too.
It will also eat any eggs that have not hatched yet.
How the Snail How the Snail GrowsGrows
As the snail grows, its shell grows too in a spiral shape. The new shell is added at the opening of the shell. The part of the shell the baby snail was born with, ends up in the middle of the spiral.
The baby snail shell stays at the top of the grown up shell
Engandgered Species of Engandgered Species of SnailSnail
BOGGOMOSS SNAILAdclarkia dawsonensis
Central QueenslandCentral Queensland
Engandgered Species of Engandgered Species of SnailSnail
MITCHELL’S RAINFOREST SNAIL
Thersites mitchellae
Northern NSWNorthern NSW
http://www.environment.gov.au/cgi-bin/sprat/public/publicthreatenedlist.pl?wanted=fauna#other_animals_endangered
Lorelle Holcroft and Dr John StanisicLorelle Holcroft and Dr John Stanisic