Woodlouse(isopod) attack on fresh moult pede

Salvador

Arachnosquire
Joined
Apr 13, 2013
Messages
141
Just a warning/observation, I was checking my pedes and got excited to see my biggest Ethmostigmus trigonopodus "Yellow Leg" (6") had just completed a moult. I could see though, that despite being previously in perfect condition, a terminal leg had come off. I opened the tub, to find a crowd of half grown Porcellio scaber hanging round the pede and nipping at it. You can see the damage here. Bit of shame, I've only ever seen them attack pre-killed prey before (see last pic of a meal-share with an S.hainanum) and once witnessed one kill and eat another of it's own kind who was moulting. I've always added in extra bits of food for them using small slices of banana and one or two cat biscuits, seems they really like the idea of flesh though. So, these are coming out of my tanks now. I've never trusted them with babies, hopefully I've gotten away with this and the pede doesn't drop dead.







 

ErinM31

Arachnogoddess
Joined
Feb 25, 2016
Messages
1,166
Thank you for the warning! I've heard quite conflicting accounts on whether or not it's safe to keep isopods with pedes. I'm glad I've been keeping mine apart! Hopefully yours will be good as new after another molt or two!
 

SDCPs

Arachnolord
Joined
Feb 8, 2012
Messages
659
How did the pede's antenna turn from orange to blue??? :sour:
 

Staehilomyces

Arachnoprince
Joined
Mar 2, 2016
Messages
1,447
I think he means from blue to orange. The centipede in the first pic has blue antennae.
 

Salvador

Arachnosquire
Joined
Apr 13, 2013
Messages
141
Oh yes, sorry! I did explain the last pic was a different pede, just to show an example that woodlice will feed on vulnerable animals.

Sad update : As I suspected may happen, the centipede was found dead today. Take my warning seriously, fellow centipede keepers :(
 

ErinM31

Arachnogoddess
Joined
Feb 25, 2016
Messages
1,166
Oh yes, sorry! I did explain the last pic was a different pede, just to show an example that woodlice will feed on vulnerable animals.

Sad update : As I suspected may happen, the centipede was found dead today. Take my warning seriously, fellow centipede keepers :(
Wow, I'm so sorry to hear that! :( I had hoped the damage was mostly superficial and recoverable.

Isopods and some millipedes species seem to require some animal protein in their diet and may turn on one another if this is not provided. I would have imagined these isopods would have gotten some scraps though, living with a centipede. But perhaps it is in their nature to not pass up an easy meal when presented with the opportunity. :(
 

Curiosipede

Arachnosquire
Joined
Apr 4, 2016
Messages
94
Just a warning/observation, I was checking my pedes and got excited to see my biggest Ethmostigmus trigonopodus "Yellow Leg" (6") had just completed a moult. I could see though, that despite being previously in perfect condition, a terminal leg had come off. I opened the tub, to find a crowd of half grown Porcellio scaber hanging round the pede and nipping at it. You can see the damage here. Bit of shame, I've only ever seen them attack pre-killed prey before (see last pic of a meal-share with an S.hainanum) and once witnessed one kill and eat another of it's own kind who was moulting. I've always added in extra bits of food for them using small slices of banana and one or two cat biscuits, seems they really like the idea of flesh though. So, these are coming out of my tanks now. I've never trusted them with babies, hopefully I've gotten away with this and the pede doesn't drop dead.







Honestly, in all my enclosures, I have found that P. Scaber are generally just bullies. They bully other isopods, and roaches too.
 

EricSJCA

Arachnopeon
Joined
Jan 8, 2016
Messages
31
I know this is an old thread, but in case anyone else comes across it, there's a guy named Adam on this thread,
https://www.facebook.com/groups/1772022706363299/permalink/2034489673449933/
who says the following:

The only isopod I trust with my inverts is P. Dilatatus. They seem to be able to subsist on the least amount of food, and get big enough that they are eaten before they overpopulate....
I have 29 centipedes, spanning 11 different species, in with dilatatus. Been using them for over a year. I feel pretty safe saying they're pretty safe...​
 

Ghoul

Arachnosquire
Joined
Jul 16, 2016
Messages
134
After keeping isopods for over a year, I can say that Porcellio scaber are definitly one of the more aggressive species (they bite eachother too) and they will eat anything even if provided with enough protein. Even their own young. :(

There's a lot of other isopod species that behave differently. I haven't kept Porcellio dilatatus myself, but I know that Armadillidium species seem to be generally very calm. Most issues with cannibalism in other species can be prevented by feeding enough protein and cuttlefish bone so they have enough calcium for their exoskeleton.
 

LawnShrimp

Arachnoangel
Joined
Dec 9, 2016
Messages
908
Wow agressive roly polys lol who would have thought
Isopods are nasty little beggars. I keep a ton of them and I love them, but I don't trust them whatsoever. I had an old female cricket who was dying and, being in the days before I got centipedes, tossed her into the Porcellio/Armadillidium cup. Both species would take bites from her antennae and cerci whenever she stopped to rest. Before long they were tearing into her as she was still moving.

I don't doubt that a live and healthy centipede could fall prey to woodlice. As such, I keep my isopods separate from all of my other animals.
 

dragonfire1577

Arachnolord
Joined
Oct 7, 2015
Messages
637
Although larger isopods, especially Porcellio scaber can harm freshly molted inverts I would not use this to say all species pose a risk. Trichorhina tomentosa have never caused me a single issue maxing out at only a few millimeters and living below the soil, they are pretty shy but clean up mold or poop decently well and are in all my enclosures that have moist substrate along with springtails.
 
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