Lasius niger - no new pupae

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MarniC
Posts: 6
Joined: Thu Sep 05, 2019 10:49 am
Location: UK

Lasius niger - no new pupae

Post: # 63771Post MarniC
Thu Sep 05, 2019 11:08 am

Hello everyone!
I'm new here on the forum so wanted to introduce myself and ask for help with an issue I have with my Lasius niger colony. I have the colony for about a year now and at it's peak it had approximately 200 workers. For the last 2 months however I've noticed that despite the queen laying new eggs and the eggs developing into larvae there are no pupae at all. I raised that same issue at other forum and no one was able to tell what is the reason.
Ants are kept in an Y tong nest I made myself. I feed them with honey as well as mealworms and crickets on a regular basis and I can see them eating. The outworld is made with grout with some sand on top so no way they can keep the pupae somewhere outside the nest.
Any ideas what's going on as I begin to worry? It's the first colony I had and I wouldn't like to loose it.

MarniC
Posts: 6
Joined: Thu Sep 05, 2019 10:49 am
Location: UK

Re: Lasius niger - no new pupae

Post: # 63776Post MarniC
Thu Sep 05, 2019 11:19 am

See some pictures below

https://ibb.co/7WFv9SW
https://ibb.co/qmj76Mm
https://ibb.co/b7QmVhV
https://ibb.co/s27Wm8p
https://ibb.co/xz5y6pb
https://ibb.co/Gdb4c71

Hawkeye
Posts: 1470
Joined: Mon Jun 24, 2019 4:38 pm
Location: Almelo

Re: Lasius niger - no new pupae

Post: # 63777Post Hawkeye
Thu Sep 05, 2019 11:20 am

Could it be a protein deficiency? Have you spotted ants eating larvae?

MarniC
Posts: 6
Joined: Thu Sep 05, 2019 10:49 am
Location: UK

Re: Lasius niger - no new pupae

Post: # 63778Post MarniC
Thu Sep 05, 2019 11:23 am

Hawkeye wrote:
Thu Sep 05, 2019 11:20 am
Could it be a protein deficiency? Have you spotted ants eating larvae?
No I haven't but they can not just disappear can they? Do you think I should offer them more protein? I'm feeding them mealworms or crickets at least 3 times a week (1 cricket or 2 mealworms cut into smaller pieces).

Hawkeye
Posts: 1470
Joined: Mon Jun 24, 2019 4:38 pm
Location: Almelo

Re: Lasius niger - no new pupae

Post: # 63780Post Hawkeye
Thu Sep 05, 2019 11:26 am

MarniC wrote:
Thu Sep 05, 2019 11:23 am
Hawkeye wrote:
Thu Sep 05, 2019 11:20 am
Could it be a protein deficiency? Have you spotted ants eating larvae?
No I haven't but they can not just disappear can they? Do you think I should offer them more protein? I'm feeding them mealworms or crickets at least 3 times a week (1 cricket or 2 mealworms cut into smaller pieces).
Yeah I'd say that is too little for a colony of such size. Try doubling the amount and preferably offer them a greater variety too. A couple of mosquitoes on day 1, a large cricket on day 2, a mealworms on day three, housefly on day four etc

MarniC
Posts: 6
Joined: Thu Sep 05, 2019 10:49 am
Location: UK

Re: Lasius niger - no new pupae

Post: # 63781Post MarniC
Thu Sep 05, 2019 11:28 am

Hawkeye wrote:
Thu Sep 05, 2019 11:26 am
MarniC wrote:
Thu Sep 05, 2019 11:23 am
Hawkeye wrote:
Thu Sep 05, 2019 11:20 am
Could it be a protein deficiency? Have you spotted ants eating larvae?
No I haven't but they can not just disappear can they? Do you think I should offer them more protein? I'm feeding them mealworms or crickets at least 3 times a week (1 cricket or 2 mealworms cut into smaller pieces).
Yeah I'd say that is too little for a colony of such size. Try doubling the amount and preferably offer them a greater variety too. A couple of mosquitoes on day 1, a large cricket on day 2, a mealworms on day three, housefly on day four etc
I will but not sure if it's safe to give the flies or mosquitoes I catch myself as they might carry some parasites and I wouldn't like to kill the colony

Hawkeye
Posts: 1470
Joined: Mon Jun 24, 2019 4:38 pm
Location: Almelo

Re: Lasius niger - no new pupae

Post: # 63782Post Hawkeye
Thu Sep 05, 2019 11:29 am

Freeze them overnight, that should kill mites and bacteria. Thaw them and they are safe to offer

MarniC
Posts: 6
Joined: Thu Sep 05, 2019 10:49 am
Location: UK

Re: Lasius niger - no new pupae

Post: # 63784Post MarniC
Thu Sep 05, 2019 11:34 am

Hawkeye wrote:
Thu Sep 05, 2019 11:29 am
Freeze them overnight, that should kill mites and bacteria. Thaw them and they are safe to offer
I'll try that. Thanks!

LasiusSapien
Posts: 274
Joined: Tue Jul 16, 2019 2:37 pm
Location: Bristol

Re: Lasius niger - no new pupae

Post: # 63791Post LasiusSapien
Thu Sep 05, 2019 1:26 pm

MarniC wrote:
Thu Sep 05, 2019 11:08 am
The outworld is made with grout
did you mix that your self? or was it premix?

have a look at this thread https://forum.AntsCanada.com/viewtopic.php?f=25&t=648&p=63425&hilit=grout#p63425
1x Lasius Niger - early forging stage - 60-100 workers
1x Messor Barbarus - founding stage - <20 workers
1x Camponotus Turkestanus - claustral stage - 1 nanitic + brood
1x Odontoponera Transversa - semi-claustral stage - no eggs

MarniC
Posts: 6
Joined: Thu Sep 05, 2019 10:49 am
Location: UK

Re: Lasius niger - no new pupae

Post: # 63795Post MarniC
Thu Sep 05, 2019 2:32 pm

LasiusSapien wrote:
Thu Sep 05, 2019 1:26 pm
MarniC wrote:
Thu Sep 05, 2019 11:08 am
The outworld is made with grout
did you mix that your self? or was it premix?

have a look at this thread https://forum.AntsCanada.com/viewtopic.php?f=25&t=648&p=63425&hilit=grout#p63425
I mixed it myself. I know that the premixed one is toxic so no worries.

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