Aphyosemion christyi (Boulenger 1915)
Ed Purzl received this
form as A.margaretae collected in the North of the Democratic
Republic of Congo. Fowler
in 1936 described this sp. which is now considered a synonym of
christyi. |
Meaning of Name |
After Dr. Cuthbert Christy a former director of the Congo Museum in Tervuren, Belgium.. | |
First Description |
Boulenger 1915. Catalogue of the Freshwater Fishes of Africa in the British Museum (Natural History) Vol 3, London: 46. | |
Size |
5 cm | |
Meristics |
D = 10-11, A = 14-15, ll = 32-34 (Boulenger 1915) D = 9-11, A = 14-16, ll = 27-30 (Radda & Pürzl 1987) | |
Karyotype |
n = 9-18, A =18 (Huber & Scheel 1981, Scheel 1990). Chromosomes vary between populations. Eastern population tend to show n = 18 but western populations show n = 11. | |
Sub-Genus |
Aphyosemion | |
Group |
elegans | |
Synonyms |
| |
Populations
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HZ 85 / 2 - Collected near Kisangani. HZ 85 - The codes 14, 15, 16, 17, 18, 19 were collected east of Baswasendé & considered to belong to A.margaretae which is now a synonym for A.christyi. HZ 85 / 14 was called A.sp.Epulu.
| |
Type Locality |
Bafwasende, on the Lindi River north of Kisangani, north east Zaire. | |
Distribution |
Now considered to be in the east of the Zaire
drainage in the Ituri Forest region north
east of Bafwassende. | |
Habitat |
Collected in shallow areas of brooks, small streams, pools & swampy areas. These biotopes may also contain aquatic plant life. | |
Distinguishing Characteristics | Those
populations showing little in the way of red spots on the body have (by
some authors) been regarded as the synonymised sp A.decorsei
& A.schoutedeni. It is reported that this species has a violet colouration to the body. In an article by Jouke van der Zee & J.H.Huber in BKA newsletter No.494, November 2006 distinguishing characteristics were - porly developed opercular markings behind the eye; yellow lips without red bands below the mouth; a poorly developed light blue sub-marginal band in the lower caudal fin; no extensions of unpaired fins (or poorly developed). |
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Colour/Pattern Variability | High | |
History |
Originally described by Boulenger in 1915 from 10 specimens
(collected by C.Christy) as Haplochilus christyi
in the Lindi River which drains into the Zaire River a few kms west of Kisangani.
These type specimens are deposited in the Museum of Central Africa, Tervuren,
Belgium and are labelled 'Bafwasende', a location some 200-250 kms northeast of
Kisangani. Boulenger gives the following collector / location in his 1915 Catalogue.
Hoedeman reports them being imported into Belgium in 1947 & 1948. These were imported under the name Aphyosemion singa. Scheel in ROTOW 1 refers to their being kept as aquarium fish since 1949. These first imports were said to have originated from Leopoldville & had few spots on sides. In 1930 Pellegrin found the same fish at Liboumbi
but it was not until 1952 that Poll gave the fish its present name of
A.christyi. Haplochilus
christyi & A.christyi
were found at the same location in the Lindi River (sometimes quoted
in literature as Lundi) drainage near Stanleyville (Kisangani). They
were first reportedly imported to Belgium in 1951 from Leopoldville. In the UK the first documented import I can find dates back to the summer of 1938 where Fred Wright (a previous BKA Technical Editor) received a pair which had come from Germany that year. (BKA newsletter No.66, February 1971). These were reportedly identical to the 'cognatum' being distributed in 1971. This newsletter contains a b/w photo by Roloff of 'A.schoutedeni'. In 1949 Aquarium Hamburg received a shipment containing this sp. which were identified as 'Aphyosemion singa'. Several years later another import was received which had fewer red spots on the fins & body. This was considered a yellow variation. Basic outlines of these fish with descriptions can be found in the Aquarium Journal April 1962 in an article by Bruce Turner & Albert Klee. First importation into the USA was in the early 1950's. Known to be in the BKA in December 1966 when fish were sent from Australia. No population was given but it was described as being 'a striking little fish, body reflecting blue with a lined pattern of chestnut brown, made up of rows of spots, yellow fins edged at times with a bold pattern of these spots again' (BKA newsletter No.16, December 1966. The BKA had an import described as christyi in October 1974 from Kinshasa. These were said to resemble the photo on page 157 of ROTOW 1. Geoff Wood caught A.christyi in the 1970's at Kinsuka although these fish were distributed as Kinshasa. The true location was 13 km downstream from Kinshasa & about 1 km from the river. These were reportedly very colourful being blue/green in colouration. Later generations seemed to lose the original colouration. This population was only found in one small location. Red markings were found to be variable. In 1986 T.Roberts & L.de Vos collected an Aphyosemion sp. near the Epulu River ferry. The Kinshasa population was originally brought to the UK by Geoff Wood but has since disappeared. Now & again A.christyi Kinshasa is distributed from commercial imports. The collection point should be taken with a 'pinch of salt' as there is no guarantee as to where they were caught. Kinshasa is the airport of departure used for these fish. The photo below of 'Wild Import 1998' was such a collection. These collections show a large blue/purple area between the eye & mid body section. Emmanuel Vreven made collections in the Okapi Faunal Reserve. History of the synonym A.schoutedeni (Boulenger 1920) Boulenger
described this sp. in 1920 from material collected from the Medje River which
is an affluent of the Ituri River, northeast Congo.
History of the synonym A.margaretae Fowler 1936 Collected in 1934 on the
George Vanderbilt expedition to Africa. | |
Breeding Notes |
Geoff Wood in BKA newsletter No. 114, February 1975 made reference to the eggs being prone to fungus & cleanliness was important. Fry hatched in 18 - 24 days & were small. He did find it advantageous to seperate the sexes periodically. Eggs
take the usual 12-14 days to water incubate but may be semi-dry stored for 3 weeks
on wet peat. John
Buytaert wrote an article in the Belgian association newsletter which was reprinted
in BKA newsletter No.158, October 1978. He mentioned that this sp. was more difficult
to maintain. See also A.elegans for some useful tips on breeding this sp. | |
Diameter of Egg | 1 mm. | |
Remarks |
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