Fundulopanchax fallax (Ahl 1935)

This fish distributed in the BKA as A.fallax early-mid '80's
| Meaning of Name | After the latin - fallax, meaning deceptive. This refers to the resemblance with Fp.gularis. | ||||||||||||||||||
| First Description | Ahl E. 1935. Aphyosemion (Fundulopanchax) fallax. Beschreibung zweier neuer Süsswasserfische aus West Afrika. Zoologischer Anzeiger 110 (9-10): p 251-253. | ||||||||||||||||||
| Size |
13 cm | ||||||||||||||||||
| Meristics |
| ||||||||||||||||||
| Karyotype |
n = 18, A = 29 (Scheel 1990) | ||||||||||||||||||
| Sub-Genus |
Gularopanchax | ||||||||||||||||||
| Group |
| ||||||||||||||||||
| Synonyms |
| ||||||||||||||||||
|
Populations
|
| ||||||||||||||||||
| Type Locality | Given as the Gold Coast, now Ghana. Types were used from aquarium material where the exact collecting location was unknown. Ahl quotes the Gold Coast as the type locality but this is considered to be an error as the Niger Delta is the probable correct location. | ||||||||||||||||||
| Distribution |
Coastal western Cameroon from Malende in the north to Kribi in the south. | ||||||||||||||||||
| Habitat |
Swamps & swampy areas of brooks in humid rainforest. | ||||||||||||||||||
| Distinguishing Characteristics | |||||||||||||||||||
| Colour/Pattern Variability | Fairly high. | ||||||||||||||||||
| History |
First documented reports of this spes were given by Schreitmüller in 1933 where he mentions being informed of a 'yellow Fundulus' arriving from the Gold Coast. He had some pairs from Härtel of Dresden. They considered them sufficiently different from the then gularis & sent some preserved specimens to Norman at the British Museum who identified this material as spurelli (Fp.walkeri). This species had not been imported as an aquarium fish at this time. Arnold, in 1934 had 2 preserved specimens from this importation supplied by O.Scholze of Berlin who considered them to represent Nothobranchius gularis. Arnold considered they were closest to batesii. He compared them with Schreitmüller's notes & figure & found them to be comparable. These were sent to Norman at the British Museum & were identified as gularis. In 1935 Schreitmüller realised Norman's identifications were not in agreement & he asked him for an opinion to which he replied that Arnold's fish originated from the Niger Delta. Schreitmuller sent two preserved specimens to Ahl in Berlin who considered them to represent a new species & named them Aphyosemion (Fundulopanchax) fallax. Sterba considered this sp. to come from Ghana in his work Freshwater Fishes of the World. History of the synonym Aphyosemion kribianum Radda 1975. Collected
in the early part of 1973 by a large group of German aquarists collecting in the
Kribi area. They collected only one male of this sp. The biotope was a rainforest
brook close to the ferry crossing on the Lobe River. This male died in transit. | ||||||||||||||||||
| Breeding Notes | Males can be aggressive & a larger aquarium is recommended for spawning with plenty of cover for female/s in the form of mops &/or plants. Salt should be added at the rate of 2-3 teaspoons per gallon. The water should also be acid (pH 4·5 - 6·0 maximum). The bottom can be covered in silver sand or peat depending on how you prefer to collect eggs. I found the best way was to remove the fish every 2 weeks & stir the sand up. On settling swish a net in a figure '8' pattern through the water to collect the eggs. Repeat this 3 times to collect the majority of the eggs. These eggs should be placed in clean rainwater & left for 7-10 days discarding any fungussed eggs. The colouration of the egg will turn a murky white & many an egg has been discarded at this stage thinking they had gone bad. A great way of detecting bad eggs is to use 'chelated iron' this also makes the water more acid & removes phosphates. Place these eggs onto damp peat/coconut fibre or place in this medium in a bag & leave to incubate which takes 5-8 weeks. Some eggs will resist this initial hatching & the peat should be re-dried for a couple of weeks before wetting again. Fry can take newly hatched brine shrimp as a first food. Growth is rapid with sexing out starting after about 4-5 weeks. Larger fish should be moved on to another tank as they can eat smaller fry. When
first imported to the UK (early '70's) it was thought the eggs needed 8 weeks
dry storage. Later it was found that 5-7 weeks was a better incubation period. Water
incubated eggs kept slightly warmer (around 80'F) with a very slight aeration
in the container take 7 weeks to hatch. In e-mail
correspondance with a BKA member who had the Fifinda Orange form he informed me
that the parents ignored mops, fibre & peat to spawn in but favoured the roots
of the plant Java Fern. Hundreds of eggs were found here. | ||||||||||||||||||
| Diameter of Egg | Quite large. | ||||||||||||||||||
| Remarks |
I have found that large, older males of the Fifinda population
are vulnerable to shock very easily. This is not as a result of old water I have
observed. They will play dead by curling up on the tank base & to all intense
& purposes stop breathing with no movement noticeable on the gill plates. The Fifinda varieties were widely distributed in an effort to conserve them in the hobby. In 2002 both yellow & orange were still being maintained in the USA. |