Frustrated with Blaptica dubia roaches

gvfarns

Arachnoprince
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I have a small colony of Blaptica dubia for feeding my one tarantula (G. aureo) because I don't like being tied to the pet store for crickets, and I don't like crickets in general (so much chirping). I have had the T and roaches for three months.

Here's the frustration: when I throw a roach or two in there (whether small, larger, male, female, etc) either the T runs over to them, at which point they freeze and never move again, or they hide in some nook and the T never pays them any heed. Either way the roaches don't get eaten. I've left them there for days and still nothing. For a long time I thought this was the T just not being hungry (she's about 5.5"). She molted a number of weeks ago and the result is still the same with the roaches. I'd really like to powerfeed her until she's all the way grown up.

Then I finally bought a few crickets and threw one in. She ate it immediately, so I threw another, and another. She always eats them seconds after I throw them in (several at a time sometimes). Over the last two days she has eaten 13 crickets. I ran out of crickets before she stopped eating them. Ok so she likes crickets and her appetite is intact, but this kind of makes my roaches seem useless.

I have tried smashing roach heads with pliers before throwing them in because I heard that they run like idiots when you do that, but they don't seem to move much when I do it. Maybe I'm doing it wrong.

Anyway I'm just about fed up with the roaches (pun intended). They are not active enough to call attention to themselves. Perhaps it was a poor idea to have a colony of feeders when I only have one consumer. Or maybe my T just doesn't like B. dubia. The breeder from whom I got her said he always fed her roaches growing up (never crickets), but I am assuming based on what I'm seeing here that they were not B. dubia.

So couple of questions: Is there anything else I can try with these roaches before committing them to the freezer? As much as I like them for raising, they don't seem like good feeders. At least not for my T. If I tried a different species of roach, like Blatta lateralis, would I get better results? They are smaller, faster, and less likely to freeze right?

I feel let down by these dang roaches after all their rave reviews on the net.
 

Moltar

ArachnoGod
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This has been driving me nuts too. I've refined my roach preparation process to a pretty gruesome extent, this is what i do:

First i take tiny scissors and snip off their antennae so they can't really tell where the t is. Then i crush their head until i hear a crunch. Then i grab the shell near the head with tweezers and place them ON THEIR BACK a couple inches from the t. This way the cause a commotion trying to get onto their feet then they just sort of stumble in circles for a while. The problem that remains is that they cause such a commotion just grabbing onto anything and overturning it (moss, peat, etc) that i think they seem bigger than they really are to the t, making them skittish.

Even doing this the t's are somewhat hesitant. They'll nail crickets immediately but with roaches it's still like:

"what is this thing moving here? lemme feel it...
Uhmmm, i think it's food. Ok, i'll gingerly taste it with my fangs and see if it tries to get away...
Ok it's trying to get away, i think i'll eat it now..."

Also, i read an article a while back about how jumping spiders build "prey profiles". Basically every time a spider predates on a fly it gets a little more efficient at hunting flies. At the same time it forgets a little bit about hunting say, small beetles. Eventually after catching enough flies it becomes completely incompetent at catching beetles.

I think tarantulas do this too. Perhaps a t that's been eating crickets (or even lobster roaches instead of dubias) its whole life has to relearn how to recognize dubias as prey and catch them. I've noticed that for the most part slings are quicker to nab a rouch than an adult is. They never developed a prey profile for crickets. At least that's my theory...

There's a lot of research currently being done on jumping spiders' intelligence and behavior. Reading some of that stuff has given me some interesting insights into tarantula behavior.
 

desertdweller

Arachnoprince
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I had the same problem at first. If my T's don't eat them right away, the burrow never to be seen again. Finally after several tries I fed another to my rosea. (I have 18 other T's). She immediately rushed out of her hide and put a foot on it. She was so patient the dubia finally squirmed and it was all over.

Now whenever I put in a dubia she nails it immediately. After a lifetime of eating crickets it seems she needed to get used to the idea they were food.

Good luck.
 

Lucara

Arachnolord
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My G. alticeps wont touch the roaches! I even cut all the legs off of one and she would pounce on it but the second it moved she freaked out..I have no idea whats up with her. She'll eat her crickets if you leave them in there long enough but she wont touch roaches =( Crickets take FOREVER to get any size on a 5" T...
My other larger T's jump on them like a fat kid in a candy store...I dunno why she wont mess with them. =/
 

gvfarns

Arachnoprince
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Hmmm. Stupid roaches. I'd definitely be interested to hear whether other species work better than dubia, if anyone has that experience as well.

By the way, awesome replies. And so fast. What a great forum!
 

Lucara

Arachnolord
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I suppose i could try and dig up a smaller one? Maybe try and find a baby around the size of a cricket for her? if she'll eat that maybe she'll start munching on the larger ones? You think it might work?
 

jeepinwu2

Arachnoknight
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You should have saved some money and went with lobsters. I don't have any of these problems. I think I told someone in another thread that if they went with B Dubia they would eventually end up paying for feeders again.
 

gvfarns

Arachnoprince
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I suppose i could try and dig up a smaller one? Maybe try and find a baby around the size of a cricket for her? if she'll eat that maybe she'll start munching on the larger ones? You think it might work?
That's a good idea but I just squashed the head of my smallest one (which is not much bigger than a cricket) and she didn't take it (it also spent the night there in good health and with the tarantula leg on its back). Unfortunately almost all my roaches are big at the moment. The other thing I notice is that while the older roaches are docile and smart, the small roaches are super docile and downright lazy. They do nothing but freeze or maybe dig. They are way less likely to attract T attention from what I've seen. And that's saying something.
 

gvfarns

Arachnoprince
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You should have saved some money and went with lobsters. I don't have any of these problems. I think I told someone in another thread that if they went with B Dubia they would eventually end up paying for feeders again.
Looks like you are right about that. But I'm scared of climbing roaches (so's my roommate. He barely tolerates dubia). Do you think B. lateralis would work as well as lobsters?
 

Fingolfin

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I've noticed that for the most part slings are quicker to nab a rouch than an adult is. They never developed a prey profile for crickets. At least that's my theory...
.
I agree, my slings will go for little roaches way more easily than my larger t's. It is frustrating when the roach freezes and the t loses interest after a while.
 

K1j1m

Arachnosquire
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Only reason i like B dubia is they cant escape and infest my house.
 

miarachnids

Arachnoknight
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I used to be afraid that lobster roaches and red runners would infest my house. I am not any more. if you set them up right there is not a problem.
I keep mine in a 10 gal. plastic tub with a snap on lid. You can get these any where. Put clear packing tape around the inside of the container. A couple inches from the top. The roaches can not climb the tape.
After awhile the tape gets dirty, and the roaches can hold on to the dirt and climb up. So every time i feed them i wipe off the tape with a damp rag. good as new. for 4 years i have been doing this and not had 1 roach escape.

Hope this helps
 

hamfoto

Arachnodemon
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B. dubia suck! I just got rid of all mine and gave them to a friend whose herps eat 'em up like crazy. No more for me...here come some lobsters!

Chris
 

Talkenlate04

ArachnoGod
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It took my collection almost a year to convert over to dubia. But now that they are eating them I have no issues at all. One of my smithi girls held out the longest, almost 11 months. But in the end she gave in.
 

arrowhd

Arachnolord
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Some of my T's immediately took to eating B. dubia. Others took awhile to get used to eating something different. I always smash the B. dubias head before feeding so that they don't hide. I have a MM A. hentzi that will not eat them. Who knows why.
 

GailC

Arachnoprince
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I have problems with dubia too, the only T who takes them regularly is my genic but he grabs anything that hits his cage floor.
The Blatta lateralis have been much better for all my other T's. They occasionally hide but do not stay there for days on end. They generally run around like a cricket would.
 

gvfarns

Arachnoprince
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I have problems with dubia too, the only T who takes them regularly is my genic but he grabs anything that hits his cage floor.
The Blatta lateralis have been much better for all my other T's. They occasionally hide but do not stay there for days on end. They generally run around like a cricket would.
Very interesting. Is there anyone who can give us a behavioral comparison between lobsters and lateralis? They both run around like crazy, right? And as indiscriminately as crickets? To me it seems like crickets run towards T's.
 

Lucara

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I've only got adults and tiny little babies so I thought I might as well try a baby and she just ignored it...My T. blondi jump on them the second they hit the ground and so does my parahybana but they blow up so fast on them that I really have to watch how many they get. Their great for plumping up females for breeding though!
 

gvfarns

Arachnoprince
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I've only got adults and tiny little babies so I thought I might as well try a baby and she just ignored it...My T. blondi jump on them the second they hit the ground and so does my parahybana but they blow up so fast on them that I really have to watch how many they get. Their great for plumping up females for breeding though!
Yer still referring to dubia, right? Just making sure because we are also discussing lateralis and lobsters.
 

scolex

Arachnoknight
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Dang I have had not one problem with mine at all! all my T's keep my population in check! My female B vagans ate 2 adults this week, T blondi 3/4 its size almost, he did pause on it, but when I checked later looked more like a soup. I have to stop the wife from steeling them for her geckos!
 
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