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RE: N. rachovii
Guy Wren wrote:
> strange coincidence that this subject pops up know cos I
> just had the
> atlas out checking on the various locations of RAC I have. Huber lists
> the type location for Rac as 19.8S 32.8E which on my map puts it
> somewhere north of a town/village called Dombe. I'm assuming that this
> is the RAC we all know and love, and is the "aquarium strain" pictured
> in many aquarium texts. This however does not correspond with what Dr.
> Watters has just stated, so is the type locality different from the old
> aq strain? Could you please let me know the grid refs for the '91 & aq
You are right, this is confusing. The following points are relevant:
1. The coordinates for the type locality of N. rachovii Ahl 1926 are
approximately: 34 degrees 50 minutes East and 19 degrees 50 minutes South,
which is the position of the town of Beira.
2. So far as I know, the aquarium strain derives from the collection of
Roloff in 1958 which was about 1.5 km outside of Beira along the airport
road. The coordinates would, therefore be about the same as those of the
type locality. The Beira '91 population was collected in this same general
area and, as I mentioned in my earlier letter, the Beira '98 population was
also from the immediate vicinity of Beira but not along the airport road (so
far as I know).
3. Hansen also collected N. rachovii in 1957 from a locality west of Beira
but, while a few specimens did make it back to the USA, I am not sure if an
aquarium strain was established.
4. The coordinates given by Huber are almost certainly incorrect because
they indicate a locality in the middle of the Chimanimani mountain range
near the border with Zimbabwe and I doubt there would be Nothos there !
Brian R. Watters
University of Regina
Regina, Sask. S4S 0A2, Canada
Ph: (306) 584-9161 (home); (306) 585-4663 (work)
Fax: (306) 585-5433
E-mail: bwatters at sk_sympatico.ca
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