Re: extra male Aggie Alenquers

[Ken Roese <ken1@iwaynet.net>]

Great, I'll try that with the eggs she laid this morning :) Perfect timing
for this thread!

At 11:19 AM 2/14/2002 -0700, you wrote:
>Ken,
>
>I know that secrecy still exists among commercial collectors, but these
people
>rarely use a locale name on their fish. Most location names that are now
published
>are from aquarists who actually collected the fish, not commercial
collectors. A.
>agassizii is one of those problem fish. Uwe Römer once wrote me that we
might be
>dealing with either one widely distributed species or 12 or more daughter
>(sibling) species.
>
>As for a better sex ratio, I'd try dropping the fry's rearing tank
temperature to
>around 72-74ºF (22-23ºC) for the first 4-6 weeks. I'll bet you'll skew
your ratio
>to mostly females. I once had a spawn in which all agassizii 100 fry sexed
out to
>be females. It was late summer & I wasn't heating the fish room when the
adults
>spawned. It was cooler than usual during the day and night, temperatures
dropping
>into the mid-60s F. The tank temperature stayed around 72ºF for about a month
>until I started heat the room.
>
>Mike Wise
>
>Ken Roese wrote:
>
>>         I did notice a little difference in the blues. Thought it might be
>> something to do with the photograph more than the fish. I've also heard
>> stories of collectors naming fish for a collection site where they were
>> never collected from to protect their fishing holes from competitors, thus
>> I just wanted to make sure.
>>         Now, how can I get a larger female ratio? Lower temp or Higher
temp? I
>> have read temps can decide the sexes in apistos and pH in west africans. My
>> WA's I can get a good ratio, my apistos are always skewed,
>>
>> Thanks,
>> Ken
>>
>> At 10:41 AM 2/13/2002 -0700, you wrote:
>> >Ken,
>> >
>> >Alenquer & Iquitos Blue are at least different populations. Whether or not
>> they are
>> >the same species - or even A. agassizii - is up for question, too.  Both
>> 'forms' show
>> >minor differences from the holotype of A. agassizii. That's why I say they
>> might not
>> >even be A. agassizii. Undoubtedly they are closely related although not
>> found close
>> >together. Let's face it Iquitos, Peru is a couple of thousand miles up the
>> Amazon from
>> >Alenquer, Brazil. I've never seen a live Iquitos Blue (? = A. cf.
agassizii
>> >(Pastel/Tapiche) ?), only photos. These photos show a more pastel
>> blue/gold fish than
>> >the metallic blue/gold A. cf. agassizii (Alenquer) that I've had. I can
>> see subtle
>> >differences in the caudal fin pattern, but I can't honestly say this is
>> diagnostic. It
>> >may very well be due to the small number of pictures of Iquitos Blue (only
>> 2) that
>> >I've seen.
>> >
>> >A. agassizii (in the broadest sense) is extremely widespread all along the
>> main
>> >channel of the Amazon, including up into the middle Rio Negro and
>> mid-upper Rio
>> >Madeira. Considering the amount of isolation and resultant lack of genetic
>> mixing, I
>> >wouldn't be surprised if we are seeing some sort of speciation in this
>> "species".
>> >We'll just have to wait for genetic testing to know for sure. Until then I
>> wouldn't
>> >list them with a locality name (Alenquer or Iquitos Blue) if I crossed the
>> two. I'd
>> >probably just call them 'Blue & Gold Agassizii'. It would be unethical to
>> give them a
>> >locality name when selling to others interested in pure populations.
>> >
>> >Mike Wise
>> >
>> >Ken Roese wrote:
>> >
>> >> Are the Alenquer and Iquitos Blue the same fish. All the pics I've
>> >> seen of Iquitos look a lot like the Alenquer.
>> >>
>> >> At 12:41 AM 2/13/2002 -0500, you wrote:
>> >> >Hello all
>> >> >
>> >> >Nice to have everyone back... Hope you are doing well...  I know I
am up
>> >> >here in the Mts.
>> >> >
>> >> >I know its cold and frigid here in the northeast but i have about 6
>> >> >extra male Alenquers.. Is anyone in need of a male or two... I can wait
>> >> >till warm weather to ship them to you...or they go to auction this
>> >> >weekend... one way or another i would like to have them find a new
home.
>> >> >
>> >> >John
>> >> >
>> >> >
>> >>
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