Entity

Time filter

Source Type


Querouil S.,Montpellier University | Querouil S.,Laboratoire Mixte International Evolution Et Domestication Of Lichtyofaune Amazonienne Lmi Edia | Vela Diaz A.,Laboratoire Mixte International Evolution Et Domestication Of Lichtyofaune Amazonienne Lmi Edia | Vela Diaz A.,Institute Investigaciones Of La Amazonia Peruana Iiap | And 6 more authors.
Journal of Applied Ichthyology | Year: 2015

The South American genus of Cichlid fish Apistogramma comprises over 100 species, most of which are difficult to identify. There is a need to clarify species limits and evolutionary relationships, conduct fine-scale phylogeographic revision of some species complexes, and collect information on population conservation status. In addition, recent studies suggest that female mate choice may lead to reproductive isolation and potentially to sympatric speciation in some species. Highly variable bi-parentally inherited molecular markers are needed to determine reproductive units in order to test this hypothesis. Microsatellite markers were developed for fine-scale population genetic analyses within the genus Apistogramma, based on a DNA library of 7567 candidate loci. A set of 40 loci with dinucleotide repeats was selected and tested for amplification and dimorphism in three Apistogramma species (six samples). Thirteen polymorphic loci, combined in three multiplex sets, were retained and analyzed in nine Apistogramma species (47 samples) representative of the genus diversity in the Peruvian Amazon basin. All loci presented a high level of heterozygosity and polymorphism in most species. This will be helpful in evolutionary genetics and conservation studies. © 2015 Blackwell Verlag GmbH. Source


Garcia-Davila C.,Laboratoire Mixte International Evolution Et Domestication Of Lichtyofaune Amazonienne Lmi Edia | Garcia-Davila C.,Institute Investigaciones Of La Amazonia Peruana Iiap | Duponchelle F.,Laboratoire Mixte International Evolution Et Domestication Of Lichtyofaune Amazonienne Lmi Edia | Duponchelle F.,Montpellier University | And 15 more authors.
Genetica | Year: 2013

Pseudoplatystoma species are highly prized South American Pimelodid migratory catfishes. Until recently, their taxonomy was not clearly established, with discrepancies between morphological and molecular analyses. Here, Pseudoplatystoma species from the Peruvian Amazon were characterized at the molecular level from a sample representing the observed range of their color pattern variations in the study area. Analyses were performed using seven microsatellite loci for 103 specimens and, for part of them (52), using sequences of two regions of their mitochondrial genome [Cytochrome Oxidase subunit I (COI) and Control Region (CR)]. Factorial correspondence analysis and assignment tests based on microsatellite polymorphism showed that the specimens originally identified as P. punctifer belonged to two different gene pools highly differentiated from P. tigrinum. Morphological examination identified two different morphotypes (with and without black stripes), suggesting the existence of two distinct taxa within P. punctifer. This result was corroborated by the ML tree based on CR sequences, where all individuals but four clustered in a similar way as in the FCA and Bayesian assignment tests. For these four individuals, mitochondrial introgression or retention of ancestral polymorphism was likely. In contrast, the ML tree based on COI sequences showed that reciprocal monophyly was not yet achieved for this marker for the two P. punctifer taxa. The existence of three sympatric species of Pseudoplatystoma in the Peruvian Amazon is discussed in relation to their molecular characteristics, color patterns and ecology. Evolutionary scenarios regarding their divergence are hypothesized. © 2013 Springer Science+Business Media Dordrecht. Source


Garcia-Davila C.,Institute Investigaciones Of La Amazonia Peruana Iiap | Garcia-Davila C.,Laboratoire Mixte International Evolution Et Domestication Of Lichtyofaune Amazonienne Lmi Edia | Castro-Ruiz D.,Institute Investigaciones Of La Amazonia Peruana Iiap | Castro-Ruiz D.,Laboratoire Mixte International Evolution Et Domestication Of Lichtyofaune Amazonienne Lmi Edia | And 21 more authors.
Journal of Applied Ichthyology | Year: 2015

Amazonian ichthyofauna has one of the richest specific diversities on earth. However, life history strategies of most species remain poorly-known owing to logistical difficulties, although this information is essential for species conservation and sustainable fisheries management. An inventory of specific diversity in plankton samples might be an efficient way of studying breeding seasons and breeding localities of fish species, providing their precise taxonomic identification can be ensured. Herein, using barcoding of the cytochrome c oxidase subunit I (COI) gene, species were identified in monthly plankton samples collected in the lower reaches of the Napo, Marañón and Ucayali rivers. A total of 16 species of pimelodid catfish were identified. For the most abundant species, two tendencies were observed, with breeding periods preferentially occurring during rising and high water periods (Brachyplatystoma filamentosum, Pimelodus blochii) or during receding and low water periods (Brachyplatystoma rousseauxii, Brachyplatystoma platynemum, Brachyplatystoma vaillantii, Hypophthalmus edentatus, Hypophthalmus marginatus). For all of these species except for B. rousseauxii, this is new information for the Peruvian Amazon. Their reproductive behaviours are discussed in term of adaptive strategies to environmental conditions, where hydrological cycles play essential roles in resource accessibility and dispersal capabilities. © 2015 Blackwell Verlag GmbH. Source


Romer U.,Laboratoire Mixte International Evolution Et Domestication Of Lichtyofaune Amazonienne Lmi Edia | Romer U.,University of Trier | Beninde J.,Laboratoire Mixte International Evolution Et Domestication Of Lichtyofaune Amazonienne Lmi Edia | Beninde J.,University of Trier | And 10 more authors.
Vertebrate Zoology | Year: 2013

A new species of Apistogramma is described from Peru, based on a total of 28 specimens collected in a small forest stream in the catchment of a nameless tributary of the Rio Amazonas about 80 kilometres south of Iquitos, Departamento Loreto (approximately 73° 34′ W / 04°24′ S). At first sight Apistogramma paulmuelleri sp. n. resembles A. regani, but is differentiated from the latter and all other Apistogramma species by the combination of a large band-like spot on the caudal-fin base, four distinct abdominal stripes, a roundish, banded caudal fin, a low dorsal fin without any striking features, in adult males yellow on the chin between the gill covers and on parts of the branchiostegal membranes, ivory sides to the head below the cheeks, and reversal of the band pattern during aggression and courtship display. Apistogramma paulmuelleri sp. n. is currently thought to be a representative of the Apistogramma eunotus complex within the Apistogramma regani lineage. © Senckenberg Gesellschaft für Naturforschung, 2013. Source

Discover hidden collaborations