LEPORINUS FRIDERICI PDF

The megadiversity of the neotropical ichthyofauna has been associated to recent diversification processes, reflecting in subtle or lacking morphological differentiation between species, challenging the classical taxonomic identification. Leporinus friderici occurs in several river basins of South America, and its nominal taxonomic validity has been questioned. Its wide distribution within the Brazilian Shield suggests that this species could be genetically structured among the hydrographic basins, despite a sharp morphological similarity. In this study, we performed phylogenetic analyses, based on three nuclear recombination activating gene 1, RAG1, recombination activating gene 2, RAG2, and myosin heavy chain 6 cardiac muscle alpha gene, Myh6 and two mitochondrial COI and Cytochrome b, Cytb markers, in specimens morphologically similar to L.

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More on author: Bloch. Reported from Argentina Ref. Short description Morphology Morphometrics Dorsal soft rays total : 12; Anal soft rays : Very active during the rainy season, they gain the flooded zones where they are captured with nets.

In dry season, they are confined to the deepest parts of the river where they are captured with fishing rods. Feed primarily on fruits, seeds and termites. The food is crushed by four strong teeth on each half-jaw.

Males are sexually mature at 1 yr, while females are mature at 2 years. Distinct pairs breed on densely grown weedy places Ref. Reproduction takes place from November to June, with a peak from December to March but mature individuals can be found year round. Females spawn around , to , eggs Ref. The females grow slightly faster than the males; however this difference is clearly perceptible only after 4 years of age. Its excellent flesh makes it ideal for consumption in spite of its numerous bones Ref.

Britski , Anostomidae Headstanders. Reis, S. Kullander and C. Ferraris, Jr. Sounds Ciguatera Speed Swim. Estimates based on models Phylogenetic diversity index Ref. Trophic Level Ref. Generation time: 4. Resilience Ref.

Vulnerability Ref. Price category Ref. Common name e. Gadus morhua. Leporinus friderici Bloch , Threespot leporinus. Freshwater; benthopelagic; potamodromous Ref. Maturity: L m Dorsal soft rays total : 12; Anal soft rays : Adults occur in ponds Ref. Pairing is distinct during copulation Ref. Garavello, J. CMS Ref. Fisheries: minor commercial; aquaculture: experimental. Collaborators Pictures Stamps, Coins Misc. Summary page Point data Common names Photos. Phylogenetic diversity index Ref.

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KORENI CELA KNJIGA PDF

Leporinus friderici

The reproductive strategy of a species depends upon the interaction between intrinsic and extrinsic factors. Size-associated sexual dimorphism was observed, that is females dominated the longer length categories, and males the shorter. The minimum size at which L. In Itaipu, stabilization between the maximum and minimum lengths at first maturation was also noted after year 6 following closure and continuing until year In general, the breeding season lasted from October through April, although cyclic changes in the duration and intensity of this season were evident. The formation of Itaipu Reservoir had a greater effect on the reproduction of L. It was concluded that reproductive strategies constitute ecological adaptations that are temporally and spatially altered and are fitted to resource availability and environmental pressure.

MARSHAK AND MITRA STRUCTURAL GEOLOGY PDF

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More on author: Bloch. Reported from Argentina Ref. Short description Morphology Morphometrics Dorsal soft rays total : 12; Anal soft rays : Very active during the rainy season, they gain the flooded zones where they are captured with nets. In dry season, they are confined to the deepest parts of the river where they are captured with fishing rods.

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