Apistogramma ortegai (Teleostei: Cichlidae), a new species of cichlid fish from the Ampyiacu River in the Peruvian Amazon basin

Britzke, Ricardo; Oliveira, Cláudio; Kullander, S.

doi:10.11646/zootaxa.3869.4.5

Cited by 996 publications

(8 citation statements)

References 7 publications

(13 reference statements)

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“…atahualpa Römer, 1997 are included in the agassizii lineage in the phylogeny of Miller and Schliewen [ 18 ], whereas both species are clustered with species of the steindachneri lineage in both Römer [ 11 ] and the present study. On the basis of morphological data, Britzke et al [ 67 ] included A . sp.…”

Section: Discussionmentioning

confidence: 99%

Tempo and rates of diversification in the South American cichlid genus Apistogramma (Teleostei: Perciformes: Cichlidae)

et al. 2017

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Evaluating biodiversity and understanding the processes involved in diversification are noticeable conservation issues in fishes subject to large, sometimes illegal, ornamental trade purposes. Here, the diversity and evolutionary history of the Neotropical dwarf cichlid genus Apistogramma from several South American countries are investigated. Mitochondrial and nuclear markers are used to infer phylogenetic relationships between 31 genetically identified species. The monophyly of Apistogramma is suggested, and Apistogramma species are distributed into four clades, corresponding to three morphological lineages. Divergence times estimated with the Yule process and an uncorrelated lognormal clock dated the Apistogramma origin to the beginning of the Eocene (≈ 50 Myr) suggesting that diversification might be related to marine incursions. Our molecular dating also suggests that the Quaternary glacial cycles coincide with the phases leading to Apistogramma speciation. These past events did not influence diversification rates in the speciose genus Apistogramma, since diversification appeared low and constant through time. Further characterization of processes involved in recent Apistogramma diversity will be necessary.

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Section: Discussionmentioning

confidence: 99%

Tempo and rates of diversification in the South American cichlid genus Apistogramma (Teleostei: Perciformes: Cichlidae)

et al. 2017

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“…in such a way as to cover most of the phylogenetic diversity present in the region. Some species are widespread in the Amazon basin (A. agassizii, A. bitaeniata, A. cacatuoides Hoedeman, 1951), others are restricted to sub‐basins of the Peruvian Amazon (A. rositae Römer et al., ), while others are endemic to just a few lakes or streams (A. barlowi Römer and Hahn, ; A. cinilabra Römer et al., ; A. ortegai Britzke et al., ). Two species with limited distributions have yet to be described: A. sp.…”

Section: Methodsmentioning

confidence: 99%

“…The latter has recently been included in the taxon A . ortegai (Britzke et al., ), but has a distinct and characteristic phenotype, and represents an as yet undescribed taxonomic entity (a revision of A . ortegai is in process).…”

Section: Methodsmentioning

confidence: 99%

“…The former is phenotypically clearly different from all other species of the genus. The latter has recently been included in the taxon A. ortegai (Britzke et al, 2014), but has a distinct and characteristic phenotype, and represents an as yet undescribed taxonomic entity (a revision of A. ortegai is in process). All specimens were morphologically identified by Uwe R€ omer and submitted to mitochondrial and nuclear DNA sequencing for species confirmation.…”

Section: Apistogramma Samplesmentioning

confidence: 99%

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Development and characterization of polymorphic microsatellite markers in neotropical fish of the genusApistogramma(Perciformes: Labroidei: Cichlidae)

et al. 2015

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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.

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“…In P. splendida , as well as in other species of cichlids, strong sexual dimorphism is reflected as differential growth between sexes; males are often larger than females. As males are territorial and spawning occurs in pairs, larger males may have a selective advantage during male‐to‐male competition (Parker ; Faunce et al ; Oldfield et al ; Britzke et al ).…”

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confidence: 99%

Masculinization of the Native Bay Snook, Petenia splendida, Using Oral Administration of the Synthetic Steroid 17α‐methyltestosterone

Contreras-García

Contreras-Sánchez

Mcdonal-Vera

et al. 2017

J World Aquaculture Soc

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The possibility of inducing sex reversal in bay snook, Petenia splendida, was evaluated to generate a protocol aimed at producing single-sex populations (100% males) and improving farming conditions for this species. This popular staple food is a cichlid fish native to Central America, with aquaculture potential. We evaluated oral administration of the synthetic steroid 17 -methyltestosterone (MT) to determine optimal dosage (30, 45, and 60 mg/kg of food) and days of feeding (30, 45, and 60) to attain efficient masculinization. The statistical analysis indicates a highly significant effect of both factors as well as for the interaction (P < 0.01). We registered significant differences in growth at the end of the experiment; fish fed with 60 mg of MT for 60 d reached the largest size, while fish fed with no MT were smaller. No significant differences were observed for survival (P > 0.05), ranging from 55.7 to 75.3% in the treatments. We recommend the use of 60 mg/kg of MT for 30 d for achieving successful sex reversal. This study provides valuable information supporting the inclusion of new species in aquaculture, reducing time and costs associated with sex reversal previously proposed for the species. KEYWORDS native cichlids, sex reversal, tenguayaca

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Apistogramma ortegai (Teleostei: Cichlidae), a new species of cichlid fish from the Ampyiacu River in the Peruvian Amazon basin

Cited by 996 publications

References 7 publications

Tempo and rates of diversification in the South American cichlid genus Apistogramma (Teleostei: Perciformes: Cichlidae)

Tempo and rates of diversification in the South American cichlid genus Apistogramma (Teleostei: Perciformes: Cichlidae)

Development and characterization of polymorphic microsatellite markers in neotropical fish of the genusApistogramma(Perciformes: Labroidei: Cichlidae)

Masculinization of the Native Bay Snook, Petenia splendida, Using Oral Administration of the Synthetic Steroid 17α‐methyltestosterone

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