How do we develop slug as a model?

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Summary of ChatShaala as quoted by Enas; 24th July 2023

I found a slug on 5th July 2023 on the floor which is next to the ground.

Similarities between slug and snail
● 2 pair tentacles
● Contracts tentacles when touched.
● Produces mucus substance.

Difference – snail have hard outer shell whereas slug don’t.

What does slug eat?
Cabbage leave, Pumpkin

Observation –
• slug hide under the leaves and it likes shadowy areas.
• Lazy during day time.

@Lahari asked how the slug is surviving without hard shell?

Slugs are nocturnal or diurnal?

On 5th July was given red Guava fruit.
On 6th July found that one of its piece has been eaten along with this found some white color worms (larvae).
Earlier I thought that it has been eaten by slug and I started giving Guava on daily basis but then I found slug is not eating Guava.

Later I concluded that the red Guava is most probably eaten by that white larvae.

My collaborator @Abhi0703 had sent the video of snail eating Cabbage.

So I also started giving Cabbage and Pumpkin to the slug and found that slug is eating both of them.
On 14th July given the Cabbage and Pumpkin and on 15th July found it has been eaten.

We discussed about the tentacles of slug as we can see in the photo slug has two pair of tentacles.

● The upper pair have eye pots which is sensitive towards light and that’s why this pair of tentacle is called optical tentacle .

● The Lower pair of tentacles is comparatively smaller than the optical one and this is used for tasting.
so how do we construct on our knowledge on slug? what is so special about slugs.

Lets understandand Eric Kandel’s work.

Eric Kandel: Learning about the Human Brain from Sea Slugs

Eric Kandel’s research question or his objective was to study learning and memory behaviour.
These behaviours can be studied by observing the neurons…
Human body has about billions of neurons. It would be easier for Eric Kandel to observe a body having less neurons as compared to human body. Observing and studying billions of neurons is not easy.
This could be the reason that Eric Kandel selected sea slugs which has just 20,000 neurons (less as compared to human body)

Kandel and his team soon identified a simple defensive reflex in the slug similar to the human reflex to quickly pull one’s hand away from a hot object. Scientists once thought that only higher order animals could learn, but Kandel soon showed that slugs could be taught to modify this reflex. “It was, for me, very exciting, because I had never done these behavioral experiments before,” recalls Kandel.
Quoting @Lydia from CUBE Archives

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