Rivulus amanapira, Costa 2004

History

Alternative name Laimoemion amanapira.

 

 
Rivulus (Laimosemion) amanapira - male. Sao Gabriel de la Cachoeira, upper Rio Negro basin, Amazonas. © Image made by W. Costa taken from its original description.
Rivulus (Laimosemion) amanapira - male. Sao Gabriel de la Cachoeira, upper Rio Negro basin, Amazonas. © Image made by W. Costa taken from its original description.

Reproduction

Keeping and breeding is easy but a tight fitting cover to the aquarium is necessary because their ability to jump, even through the smallest opening, is unbelievable.

This species can, if there is enough space for them, be housed in a tank with more than one male and several females. If separated before and brought together again however, they can be very aggressive towards each other and fight to become the dominant fish. The best way to produce a good number of fry is to put a pair or a trio in a small tank of about 10 litres, with a small filter in it or with some aeration. On the bottom place some peat moss or dark gravel and a floating "mop" to give an area for laying their eggs. The fish will, if they are fed a rich variety of live food, spawn during their whole adult life and produce between 5 to 15 eggs daily.

 

 

The eggs should be collected by hand and stored for about 24 days (see remarks) in a small container. Eggs are 1.6 mm and amber coloured. It is wise to add an anti fungicide to the water you store the eggs in, to prevent fungus attacks. After hatching the young fry can eat newly hatched artemia nauplii without any problem. It takes 4 to 5 months to raise them to maturity.

Their lifespan can be up to 3 years in captivity.

Remarks :

The species was never available in life to aquarists. It is close related to L. tecminae and for that it could be a species that need longer incubation - up to 3 months - as well.


Variations
 

Map

   

Meristics

Max. size 5.0 cm.
Dorsal 8.0,
Anal 14.5,
D/A 12,
LL scale count (average)48.5
Pre- dorsal length to % SL – 74.5 %
Depth to % SL – 18.6 %

   

Literature
Costa, W.J.E.M. 2004. Rivulus uakti sp. n. and R. amanapira sp. n. (Teleostei: Cyprinodontiformes: Rivulidae): two new species from the upper Rio Negro, Brazilian Amazon. Zootaxa, 465: 7, figs. 4-5.