Search found 110 matches

by mauriciodelamaza
Fri Jul 28, 2006 11:51 am
Forum: General Fish Topics
Topic: ACA 2006
Replies: 18
Views: 6168

:D Excellent convention. It was great to meet so many of you guys in person!!!!!!!!! A few more pictures: http://i19.photobucket.com/albums/b173/mauriciodelamaza/Pamyyo01.jpg Pam Chin and I http://i19.photobucket.com/albums/b173/mauriciodelamaza/toga01.jpg :twisted: :twisted: :twisted: Toga Party ht...
by mauriciodelamaza
Sun Mar 05, 2006 6:01 pm
Forum: Taxonomy
Topic: Sympatric speciation in the Midas cichlid complex
Replies: 15
Views: 6479

:D Hello Pilosaur, Michi, Sorry I have been absent from the forum for some time, but I have been very very busy lately ............. and I concur with you both: it's just really hard to show a lack of something (like the lack of geographic barriers) than to show that there was something there. Salud...
by mauriciodelamaza
Sat Feb 11, 2006 11:05 am
Forum: Taxonomy
Topic: Sympatric speciation in the Midas cichlid complex
Replies: 15
Views: 6479

:D Thanks Thomas for the link :!:
by mauriciodelamaza
Sat Feb 11, 2006 11:00 am
Forum: Taxonomy
Topic: Sympatric speciation in the Midas cichlid complex
Replies: 15
Views: 6479

In short, my point of discussion is, isn't nature showing us sympatric speciation so promiscuously that it should have been considered a possibility way before
I could not agree more with you Juan Miguel :D

Saludos

Mauricio De La Maza
by mauriciodelamaza
Sat Feb 11, 2006 2:15 am
Forum: Taxonomy
Topic: Phylogenetics discussion
Replies: 34
Views: 12256

Are all organisms in a constant state of acquiring/losing characteristics through mutation? I suppose I can answer that myself: that is the fundamental supposition of evolution, so yes. I concur with you :D To me this implies that an organism can change morphologically (or even, to an extent, behav...
by mauriciodelamaza
Sat Feb 11, 2006 1:53 am
Forum: Taxonomy
Topic: Sympatric speciation in the Midas cichlid complex
Replies: 15
Views: 6479

:D Que tal Juan Miguel, You wrote I don´t really understand what it so hard to believe about sympatric speciation and I think in that phrase lies the answer to it: believe . As you well know, I am also a firm believer of the phenomenon of sympatric speciation...and I will go even further to state th...
by mauriciodelamaza
Fri Feb 10, 2006 1:20 am
Forum: Taxonomy
Topic: Sympatric speciation in the Midas cichlid complex
Replies: 15
Views: 6479

:D Thanks for the link Michi!
by mauriciodelamaza
Thu Feb 09, 2006 8:29 pm
Forum: Taxonomy
Topic: Phylogenetics discussion
Replies: 34
Views: 12256

You are a smart man. I have enjoyed reading this thread :) Thanks Cumb Dunt, I feel flattered!!! Would you consider a "negative" mutation in an organism that is fit enough to be either a) unaffected or b) insubstantially affected by its presence to be what you refer to as "neutral"? I guess yes, ex...
by mauriciodelamaza
Wed Feb 08, 2006 7:55 am
Forum: Central American Cichlids
Topic: Paratheraps bifasciatus in all colors
Replies: 7
Views: 2687

Thanks Gilbert. :D .....Just curious, Aikidoguy and Michi presented a couple of months ago pictures of hypermelanistic phases of H. cyanoguttatus...... Has anyone ever observed oligomelanic phases of that species or H. carpintis in the wild? :?: :?:

Saludos

Mauricio De La Maza
by mauriciodelamaza
Sun Jan 29, 2006 10:52 pm
Forum: General Fish Topics
Topic: Darters (Etheostoma grahami)
Replies: 7
Views: 2864

Thanks Nandus. Sorry I did not answer before but I have been (and will be) in the field fot the past few days.....I actually set them up with river stones and very thin silic sand. They seem to be enjoying the setup and chasing and "hunting" the frozen blood worms as soon as they get them. The power...
by mauriciodelamaza
Thu Jan 26, 2006 4:00 pm
Forum: General Fish Topics
Topic: Darters (Etheostoma grahami)
Replies: 7
Views: 2864

I guess that would be nice and the darters would actually love it. Any ideas? The problem that I am having now is that during the next month or so I will be rearranging my office/lab/fishroom and will have have to "share" it with the workers. Otherwise I may end up working outside :o ............ As...
by mauriciodelamaza
Thu Jan 26, 2006 9:56 am
Forum: General Fish Topics
Topic: Darters (Etheostoma grahami)
Replies: 7
Views: 2864

:D Thanks Nandus for the information and tips. It has been very helpful. It seems that very little is known about this particular species, so I guess :idea: I will have to extrapolate from the information available on other darters from the sites that you gave me. A couple of pictures: http://i19.ph...
by mauriciodelamaza
Wed Jan 25, 2006 2:20 pm
Forum: General Fish Topics
Topic: Darters (Etheostoma grahami)
Replies: 7
Views: 2864

Darters (Etheostoma grahami)

Is anyone in this forum familiar with the keeping and breeding of the Percid Rio Grande darter (Etheostoma grahami)? Any tips are highly welcome :) .

Saludos

Mauricio De La Maza
by mauriciodelamaza
Wed Jan 25, 2006 1:34 pm
Forum: Central American Cichlids
Topic: Paratheraps bifasciatus in all colors
Replies: 7
Views: 2687

:D Thanks Juan Miguel,

Very interesting!!!!!!!!!

Saludos

Mauricio De La Maza
by mauriciodelamaza
Wed Jan 25, 2006 1:16 pm
Forum: Central American Cichlids
Topic: What cichlid should i choose??
Replies: 3
Views: 1532

Hello Beltt,

I think that 54 l is a bit small for all CA, except maybe some Cryptoheros species if kept as Lisa says in solitary. The above I would discourage....... How about some African of the shell-dwelling type; or a couple of Tangayikan Julidochromis?

Saludos

Mauricio De La Maza
by mauriciodelamaza
Wed Jan 25, 2006 1:09 pm
Forum: Central American Cichlids
Topic: Paratheraps bifasciatus in all colors
Replies: 7
Views: 2687

Hi Juan Miguel,

Were all the phases presented here collected in the same locality, or are the different mutation-types present in distinct lakes, being some more common in one or the other?
by mauriciodelamaza
Wed Jan 25, 2006 12:59 pm
Forum: Central American Cichlids
Topic: Close encounters of the Watery type
Replies: 12
Views: 4040

Close encounters of the Watery type

:D Hi all, After reading Willem´s wonderful article “Close encounters of the watery type”, which produced in me the same sense of tension that one gets from reading a good action-novel or a thriller, I could not, but think about the paradigm-breaking concept of sympatric speciation, and how very few...
by mauriciodelamaza
Thu Jan 19, 2006 11:42 am
Forum: Taxonomy
Topic: Phylogenetics discussion
Replies: 34
Views: 12256

:D Hi Nandus, Very interesting material indeed!! I have always thought that the phenomena of reticulation and “ecological-niche-driven allopatry” (sympatric evolution) played a much more important role in the evolution of metazoans, almost analogous to plants, than we ever thought. (Even though the ...
by mauriciodelamaza
Wed Jan 18, 2006 7:40 pm
Forum: Taxonomy
Topic: Objective, Subjective, junior synonyms and sub-species
Replies: 4
Views: 4245

Willem said, ….secondly, sub-specific names should only be used if there are sufficient differences between the two (or more) populations. Mauricio wrote The second issue that I see arises from the concept of subspecies. If we have not been able to develop a universally accepted definition for the s...
by mauriciodelamaza
Wed Jan 18, 2006 5:56 pm
Forum: Taxonomy
Topic: Objective, Subjective, junior synonyms and sub-species
Replies: 4
Views: 4245

:D Hi Willem, Again, I must say that I concur with you in most of your statement. Indeed, the majority of synonyms that have been declared so seem to be subjective synonyms. Since I guess that I started this debate with an, I admit, rather legalistic approach, I feel complied to continue with that a...

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