Search found 37 matches

by Lab
Sun Mar 22, 2009 3:15 am
Forum: Discus
Topic: Discus study shows unique chromosomes
Replies: 5
Views: 4765

Re: Discus study shows unique chromosomes

meiotic chromosomal chain I'm thinking meiotic refers to meisosis, the process during which 1 cell becomes 2 (cell deviding) Actually what you describe here is called mitosis, Bas. Meiosis is a reductional division usually related to the formation of gametes which are the units of sexual reproducti...
by Lab
Wed Jan 28, 2009 1:03 pm
Forum: South American Cichlids
Topic: Leucosticta or Jurupari
Replies: 26
Views: 4305

Re: Leucosticta or Jurupari

perhaps a silly question. Your nickname lab, does it come from shorthand for laboratory? No I'm not that fond of labs :wink: It is just made up of the first two letters of my first name and the first of my surname; Lars Brøndum. It's really a bit silly not to use my real name, but it has become a h...
by Lab
Wed Jan 28, 2009 4:50 am
Forum: South American Cichlids
Topic: Leucosticta or Jurupari
Replies: 26
Views: 4305

Re: Leucosticta or Jurupari

Hi Bas. I am really happy about your last post :) Not that I don't agree with your explanations about water chemistry, which are really quite good. On the other hand we cannot ignore the practical use of soft acidic water that many people use around the world every day. I know because i primarily ke...
by Lab
Sat Sep 20, 2008 4:35 am
Forum: Central American Cichlids
Topic: Viewpoint on xanthism
Replies: 55
Views: 5889

Re: Viewpoint on xanthism

Why do you think your belief affects the natural mechanisms involved here? Everything you know about xanthism in this species points in the opposite direction. Not true. Firstly, I think the xanthic mutation first occurred in an aquarium. The fact that there is only one could simply be because the ...
by Lab
Thu Sep 18, 2008 3:28 pm
Forum: Central American Cichlids
Topic: Viewpoint on xanthism
Replies: 55
Views: 5889

Re: Viewpoint on xanthism

Please clarify this for me: I believe that xanthic jags become yellow at over 4" in size, so the point about being less prone to predation when small probably applies in this species too. Who knows? Maybe xanthic Jags would be dominant if they occurred in nature, in which case xanthism would not be ...
by Lab
Fri Feb 15, 2008 2:38 pm
Forum: Dwarf Cichlids
Topic: Unidentified apistos and rams
Replies: 8
Views: 2834

Re: Unidentified apistos and rams

As promised:

Image

Image
by Lab
Fri Feb 15, 2008 4:08 am
Forum: Dwarf Cichlids
Topic: Unidentified apistos and rams
Replies: 8
Views: 2834

Re: Unidentified apistos and rams

I agree with Mike in all of his comments on the stocking. I think that you would also get more out of your fish keeping, especially if you breed some of your fish. I have to disagree in the sexing of the blue ram, though. I definitely think it's a male. A female would have smaller speckles inside th...
by Lab
Fri Feb 01, 2008 4:09 am
Forum: Central American Cichlids
Topic: Hybridization between C. nigrofasciatum and HRPs
Replies: 16
Views: 5434

Re: Hybridization between C. nigrofasciatum and HRPs

I take it that Willem does not consider it hybridization. I disagree. The interesting part is that the convict female did not have the choice of mating with a conspecific. I think it is reasonable to assume that the female chooses the sexual partner, not the other way around. So the reproductive iso...
by Lab
Fri Jan 25, 2008 5:20 pm
Forum: Dwarf Cichlids
Topic: Help needed with Apisto's
Replies: 13
Views: 3224

Re: Help needed with Apisto's

Pic. 3 and 5 shows A. gibbiceps for sure. It's hard to tell in the bag but there is probably even a third species there. The one a little right of the center could be a form of A. pertensis, but that is just a qualified guess based on that it would be the most likely candidate from you general area ...
by Lab
Mon Jan 21, 2008 12:41 pm
Forum: Other African Cichlids
Topic: Hemichromis sp. Bangui, sex ratio
Replies: 4
Views: 2310

Re: Hemichromis sp. Bangui, sex ratio

fully unexperienced in African cichlids, my thoughts go out to Apistogramms, which are known to be pH dependend in sexratio - low pH gives more females As many of these breed at very low (dangerously low, due to a lack of buffer capacity of the water) most breedser breed them atmax possible pH - th...
by Lab
Sun Jan 20, 2008 2:06 pm
Forum: South American Cichlids
Topic: Dicrossus Filamentosus
Replies: 10
Views: 1640

Re: Dicrossus Filamentosus

Females do not have a lyrate tail (caudal fin). If a fish shows orange/red ventral fins (maybe you ment ventral when you wrote caudal?) it is a certain female, but it doesn´t necessarily show this feature. It is said that the females only get this colour in the ventrals after having bred the first t...
by Lab
Thu Oct 04, 2007 7:42 am
Forum: Taxonomy
Topic: Cryptoheros with a K?
Replies: 10
Views: 2075

Re: A systematic revision of the genus Archocentrus

Can someone please explain why the two last posts have been edited?

I can live with being made a fool of, but I find it a bit troubling, and a general concern, that it is possible to change the content, when it is not possible to see afterwards what happened.

Lars
by Lab
Thu Oct 04, 2007 3:38 am
Forum: Taxonomy
Topic: Cryptoheros with a K?
Replies: 10
Views: 2075

Re: A systematic revision of the genus Archocentrus

Bas Pels wrote:Microgeophagus and Mikrogeophagus can hardly be both correct at the same time, only ione is valid, and the other wrong (or not a fish at all :lol: )
As a matter of fact they can :lol:
by Lab
Wed Oct 03, 2007 11:51 am
Forum: Taxonomy
Topic: Cryptoheros with a K?
Replies: 10
Views: 2075

Re: A systematic revision of the genus Archocentrus

No, but there is a k and no c in classic greek, from which both mikro- and krypto- are derived. Scientific names do not have to be latin, but can also be greek. It is true that a scientific name can be developed from any language. But it must be written in Latin letters (Art.11.1. ICZN). Greek use ...
by Lab
Wed Oct 03, 2007 7:42 am
Forum: Taxonomy
Topic: Cryptoheros with a K?
Replies: 10
Views: 2075

Re: A systematic revision of the genus Archocentrus

Dear ChromeDome, Dear all, There is no letter ‘k’ in the classic Latin. This is why it is usually transcript with ‘c’. The reason why Costa changed Cryptolebias into Kryptolebias is because the former name was already used in taxonomy. Mikrogeophagus is used instead of Microgeophagus because Kullan...
by Lab
Sun Sep 30, 2007 5:18 am
Forum: Central American Cichlids
Topic: Videos of Archocentrus octofasciatus
Replies: 22
Views: 4222

Re: Videos of Archocentrus octofasciatus

Is this behavior a convergent evolution or an ancient inherited behavior? It is present in Herichthys, Cryptoheros and Archocentrus octofasciatus. Was there one or more times this behavior appeared? More observactions should be done with related species (Archocentrus centrarchus, A. spinossisimus a...
by Lab
Wed Sep 26, 2007 4:39 pm
Forum: Dwarf Cichlids
Topic: taeniacara candidi
Replies: 10
Views: 3113

Re: taeniacara candidi

That's great, Richard :D

I'm guessing you have already witnessed the odd wobling motion of the female. What a weird little fish :shock:
by Lab
Wed Sep 26, 2007 4:38 pm
Forum: Dwarf Cichlids
Topic: Help needed with Apisto's
Replies: 13
Views: 3224

Re: Help needed with Apisto's

Looks like an Apistogramma agassizii group species, perhaps A. sp. "Tefé", but it's not possible to tell for sure. Let them grow some and post pics again.

Sorry, I don't have any dope left. Looked everywhere :wink:
by Lab
Sun Sep 23, 2007 1:35 pm
Forum: Dwarf Cichlids
Topic: taeniacara candidi
Replies: 10
Views: 3113

Re: taeniacara candidi

Sounds like there is somthing in the cave to me :wink:
by Lab
Sun Sep 23, 2007 5:19 am
Forum: Dwarf Cichlids
Topic: taeniacara candidi
Replies: 10
Views: 3113

Re: taeniacara candidi

I have bred captive bred candidi's in pH about 6. No problem.
Wild caught are probably a bit more tricky.

If everything goes well you may be lucky enough to see how the female hangs the larvae in the ceiling of the cave, unlike most apistos.

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