Pachypanchax varatraza Loiselle, 2006

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Classification	Actinopterygii \| Cyprinodontiformes \| Aplocheilidae
Synonyms	... more
Common names	... more

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Pachypanchax varatraza

Picture by Loiselle, P.V.

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Main reference

Loiselle, P.V. 2006. (Ref. 57724)
Other references | Biblio | Coordinator : Costa, Wilson J.E.M. | Collaborators

Size / Weight / Age

Max length : 6.8 cm SL male/unsexed; (Ref. 57724)

Environment

Benthopelagic; freshwater

Climate / Range

Tropical

Africa: Menambery, Fanambana and Ampanobe river basins in Madagascar (Ref. 57724).
Countries | FAO areas | Ecosystems | Occurrences | Introductions

Short description

Dorsal soft rays (total): 11 - 13; Anal soft rays: 17 - 19. Distinguished from Pachypanchax playfairii in lacking raised dorsolateral squamation and in details of its color pattern. Males without rows of discrete red dots on the flanks and red edging to the vertical fins; female lack any sort of black markings on the dorsal fin. Has the shortest pectoral fins (13.4% SL) among Malagasy Pachypanchax. Differs from Pachypanchax sakaramyi and Pachypanchax sparksorum by the absence of pectoral scales of reduced size. Can be distinguished from Pachypanchax omalonotus by the rounded dorsal and anal fins of males and their lack of discrete metallic gold spangling on the flanks; and also differs from the remaining Malagasy congeners by lack of iridescent white edging to, or darker submarginal banding on, the vertical fins (Ref. 57724). Description: Dorsal- fin rays iii,8; iv,8; iii,9; iii,10; ii,11. Anal-fin rays iii,14; iii,15; ii,16; iii,16; ii,17. Pelvic- fin rays i,5. Pectoral- fin rays 14-16 (Ref. 57724).

Found in a wide range of habits: stream flowing under relatively intact forest cover at an altitude of 70 m above sea level consisting of a series of quiet pools with clay/sand bottoms, interspersed with short stretches of flowing water over sand/ gravel bottoms and with very turbid water; and stream flowing through modified low-altitude rain forest at an altitude of 30 m above sea level consisting of clay/sand bottom, interspersed with patches of bedrock with clear water and moderate current (Ref. 57724). Feeds on terrestrial and aquatic insects (Ref. 57724).


IUCN Red List Status (Ref. 57073)	Threat to humans
Not Evaluated	Harmless

Human uses


More information
Countries FAO areas Ecosystems Occurrences Introductions Ecology Diet Food items Food consumption Ration	Common names Synonyms Metabolism Predators Ecotoxicology Reproduction Maturity Spawning Eggs Egg development	Age/Size Growth Length-weight Length-length Length-frequencies Morphometrics Morphology Larvae Larval dynamics Recruitment Abundance	Other references Biblio Aquaculture Aquaculture profile Strains Genetics Allele frequencies Heritability Diseases Processing	Collaborators Pictures Stamps Sounds Ciguatera Speed Swim. type Gill area Otoliths Brains Vision

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Internet sources

Estimation of some characteristics with mathematical models

Phylogenetic diversity index (Ref. 82805)

PD₅₀ = 0.5078

Trophic Level (Ref. 69278)

3.57 s.e. 0.48 Based on size and trophs of closest relatives

Resilience (Ref. 69278)


Vulnerability (Ref. 59153)	Price category (Ref. 80766)
Low vulnerability (10 of 100)	Not marketed/unknown

Entered by Torres, Armi G.

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