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20 results for “Poeciliopsis”
Data from: A multilocus phylogeny of the fish genus Poeciliopsis: solving taxonomic uncertainties and preliminary evidence of reticulation
The fish genus Poeciliopsis constitutes a valuable research system for evolutionary ecology, whose phylogenetic relationships have not been fully elucidated. We conducted a multilocus phylogenetic study of the genus based on seven nuclear and two mitochondrial loci with a thorough set of analytical approaches, i.e., concatenated (also known as super-matrix), species trees, and phylogenetic networks. Although several relationships remain unresolved, the overall results uncovered phylogenetic affinities among several members of this genus. A population previously considered of undetermined taxonomic status could be unequivocally assigned to P. scarlli; revealing a relatively recent dispersal event across the Trans Mexican Volcanic Belt (TMVB) or Pacific Ocean, which constitute a strong barrier to north-south dispersal of many terrestrial and freshwater taxa. The closest relatives of P. balsas, a species distributed south of the TMVB, are distributed in the north; representing an additional north–south split in the genus. An undescribed species of Poeciliopsis, with a highly restricted distribution (i.e., a short stretch of the Rio Concepcion; just south of the US-Mexico border), falls within the Leptorhaphis species complex. Our results are inconsistent with the hypothesis that this species originated by "breakdown" of an asexual-hybrid lineage. On the other hand, network analyses suggest one or more possible cases of reticulation within the genus that require further evaluation with genome-wide marker representation and additional analytical tools. The most strongly supported case of reticulation occurred within the subgenus Aulophallus (restricted to Central America), and implies a hybrid origin for P. retropinna (i.e., between P. paucimaculata and P. elongata). We consider that P. balsas and P. new species are of conservation concern.
Data from: A multilocus phylogeny of the fish genus Poeciliopsis: solving taxonomic uncertainties and preliminary evidence of reticulation
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Genomic data support the taxonomic validity of Middle American livebearers Poeciliopsis gracilis and Poeciliopsis pleurospilus (Cyprinodontiformes: Poeciliidae)
<p class="BodyA"><i>Poeciliopsis</i> (Cyprinodontiformes: Poeciliidae) is a genus comprised of 25 species of freshwater fishes. Several well-known taxonomic uncertainties exist within the genus, especially in relation to the taxonomic status of <i>Poeciliopsis pleurospilus</i> and <i>P. gracilis</i>. However, to date, no studies have been conducted to specifically address the taxonomic status of these two species. The goal of this study was to examine the taxonomic validity of <i>P. pleurospilus</i> and <i>P. gracilis</i> using genomic data (ddRADseq) in phylogenetic, population genetic, and species delimitation frameworks. Multiple analyses support the recognition of both taxa as distinct species and also permits us to revise their respective distributions. A species delimitation analysis indicates that <i>P. pleurospilus </i>and <i>P. gracilis </i>are distinct species from one another, each of which consists of two distinct lineages that are geographically structured. Phylogenetic and population genetic analyses demonstrate clear evidence that individuals of <i>P. gracilis</i> are distributed north and west of the Isthmus of Tehuantepec in both Pacific and Atlantic river systems in Mexico, whereas individuals of <i>P. pleurospilus</i> are distributed in both Atlantic and Pacific river systems south and east of the Isthmus of Tehuantepec, from southern Mexico to Honduras.</p>
Genomic data support the taxonomic validity of Middle American livebearers Poeciliopsis gracilis and Poeciliopsis pleurospilus (Cyprinodontiformes: Poeciliidae)
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Data from: Sympatry predicts spot pigmentation patterns and female association behavior in the livebearing fish Poeciliopsis baenschi
In this study, we explored the possibility that differences in pigmentation patterns among populations of the fish Poeciliopsis baenschi were associated with the presence or absence of the closely related species P. turneri. If reproductive character displacement is responsible, spotting patterns in these two species should diverge in sympatry, but not allopatry. We predicted that female P. baenschi from sympatric sites should show a preference for associating with conspecifics vs. heterospecific males, but females from allopatric sites should show no such preferences. To evaluate these predictions, we compared spotting patterns and female association behaviors in populations of P. baenschi from Central Mexico. We found that both of our predictions were supported. Poeciliopsis baenschi that co-occured with P. turneri had spotting patterns significantly different than their counterparts from allopatric sites. Using a simultaneous choice test of video presentations of males, we also found that female P. baenschi from populations that co-occured with P. turneri spent significantly more time with males of their own species than with P. turneri males. In contrast, females from allopatric populations of P. baenschi showed no differences in the amount of time they spent with either conspecific or heterospecific males. Together, our results are consistent with the hypothesis that reproductive character displacement may be responsible for behavioral and spotting pattern differences in these populations of P. baenschi.
Data from: Analysis of expressed sequence tags from the placenta of the live-bearing fish Poeciliopsis (Poeciliidae)
Matrotrophic fish in the genus Poeciliopsis (Poeciliidae) have a placenta-like structure used in post-fertilization maternal provisioning of the developing embryo. To understand better the structure and function of the Poeciliopsis placenta we derived cDNA libraries from the maternal follicular placenta of two matrotrophic Poeciliopsis sister species, P. turneri and P. presidionis. These species inherited their placenta from a common ancestor and represent one of three independent origins of placentas in Poeciliopsis. Expressed sequence tags were generated and putative function was determined using BLASTX homology searches and Gene Ontology annotation. Reverse transcriptase-PCR was used to verify placenta tissue expression of a putative candidate gene, alpha-2 macroglobulin. 1956 (71.5% of the total submitted ESTs) and 924 (71.0% of the total submitted ESTs) unique transcripts were identified for the P. turneri and P. presidionis placenta, respectively. Homology search and Gene Ontology annotation revealed putative genes whose products may be involved in specific transport functions of the maternal follicle. These putative genes are excellent candidates for future research on the evolution of the placenta. We discuss our results in light of the parent-offspring conflict theory of placental evolution and in terms of the Poeciliid placenta structure and function.
Figure 9 from: Conway KW, Mateos M, Vrijenhoek RC (2019) A new species of the livebearing fish genus Poeciliopsis from northern Mexico (Cyprinodontiformes: Poeciliidae). ZooKeys 883: 91-118. https://doi.org/10.3897/zookeys.883.37586
Figure 9 Poeciliopsis jackschultzi, Mexico, Sonora, Río Concepción a male b female. Paratype specimens. Not measured, not identified in field.
Figure 8 from: Conway KW, Mateos M, Vrijenhoek RC (2019) A new species of the livebearing fish genus Poeciliopsis from northern Mexico (Cyprinodontiformes: Poeciliidae). ZooKeys 883: 91-118. https://doi.org/10.3897/zookeys.883.37586
Figure 8 Schematic diagram of the distal tip of the gonopodium in Poeciliopsis jackschultzi (TCWC 20082.01, paratype, male, 19.0 mm SL). Abbreviations: R3, ray 3; R4a, ray 4 anterior branch (intermediate grey); R4p, ray 4 posterior branch (light grey); R5p, ray 5 posterior branch (dark grey).
Figure 6 from: Conway KW, Mateos M, Vrijenhoek RC (2019) A new species of the livebearing fish genus Poeciliopsis from northern Mexico (Cyprinodontiformes: Poeciliidae). ZooKeys 883: 91-118. https://doi.org/10.3897/zookeys.883.37586
Figure 6 Viscerocranium of Poeciliopsis jackschultzi (TCWC 20082.01, paratype, female, 23.0 mm SL) a hyopalatine arch right side in lateral view (image reversed) b ventral gill arches in dorsal view c dorsal gill arches (right side) in dorsal view d dorsal gill arches (right side) in ventral view (image reversed). Opercular bones outlined in black in a. Scale bar shared between c and d. Abbreviations: Aa, anguloarticular; Apa, autopalatine; Bb1C, basibranchial 1 cartilage; Bb2-3, basibranchials 2–3; Bh, basihyal; Cb1-5, ceratobranchials 1–5; De, dentary; Eb1-4, epibranchial 1–4; Ectp, ectopterygoid; Enpt, endopterygoid; Hb1-3, hypobranchials 1–3; Hy, hyomandibular; IC, interarcular cartilage; Iop, interopercle; GR, gill raker; Mx, maxilla; Op, opercle; Pb2-3, pharyngobranchial 2–3; Pbtp4, pharyngobranchial toothplate 4; Pmx, premaxilla; Pop, preopercle; Q, quadrate; Ra, retroarticular; Sop, subopercle; Sy, symplectic.
Figure 5 from: Conway KW, Mateos M, Vrijenhoek RC (2019) A new species of the livebearing fish genus Poeciliopsis from northern Mexico (Cyprinodontiformes: Poeciliidae). ZooKeys 883: 91-118. https://doi.org/10.3897/zookeys.883.37586
Figure 5 Mouth of Poeciliopsis jackschultzi in dorsal view (anterior to top of page) aCNP-IBUNAM 23406, holotype, male, 20.3 mm SL bTCWC 20082.01, paratype, female, 23.0 mm SL. Cusps of dentary teeth highlighted in dark grey on right side in a and b. Shaft of dentary teeth highlighted in light grey on right side in b. Abbreviations: AN, anterior nostril; D, dentary; DO, dentary teeth of outer row; DI, dentary teeth of inner row; EthP, ethmoid plate; Mx, maxilla; Pmx, premaxilla; LL, lower lip; UL, upper lip.
Figure 7 from: Conway KW, Mateos M, Vrijenhoek RC (2019) A new species of the livebearing fish genus Poeciliopsis from northern Mexico (Cyprinodontiformes: Poeciliidae). ZooKeys 883: 91-118. https://doi.org/10.3897/zookeys.883.37586
Figure 7 Gill rakers on ceratobranchials 2/3–5 in PoeciliopsisaP. jackschultzi, TCWC 20082.01, paratype, female, 23.0 mm SL bP. lucida, UMMZ 189041, female, 24.0 mm SL cP. monacha, UMMZ 178246, female, 22.0 mm SL. Gill filaments removed. Abbreviations: C2–5, ceratobranchials 2–5; Cb4T, teeth on ceratobranchial 4; GR1b, 2, 3, type 1b, 2, or 3 gill rakers; GRT, gill-raker tooth.
Figure 4 from: Conway KW, Mateos M, Vrijenhoek RC (2019) A new species of the livebearing fish genus Poeciliopsis from northern Mexico (Cyprinodontiformes: Poeciliidae). ZooKeys 883: 91-118. https://doi.org/10.3897/zookeys.883.37586
Figure 4 Sclerotic cartilage and sclerotic ossifications in members of Poeciliopsis (right side, image reversed) aP. jackschultzi, TCWC 20082.01, paratype, female, 23.0 mm SL bP. lucida, UMMZ 189041, female, 24.0 mm cP. occidentalis, UMMZ 202393, female, 35.0 mm SL. Abbreviations: AS, anterior sclerotic. PS, posterior sclerotic; SC, scleral cartilage; Scale bar: 0.4 mm.
Figure 2 from: Conway KW, Mateos M, Vrijenhoek RC (2019) A new species of the livebearing fish genus Poeciliopsis from northern Mexico (Cyprinodontiformes: Poeciliidae). ZooKeys 883: 91-118. https://doi.org/10.3897/zookeys.883.37586
Figure 2 Poeciliopsis jackschultzi, TCWC 20082.01, paratype, female, 26.7 mm SL; Mexico, Sonora, Río Concepción.
Figure 1 from: Conway KW, Mateos M, Vrijenhoek RC (2019) A new species of the livebearing fish genus Poeciliopsis from northern Mexico (Cyprinodontiformes: Poeciliidae). ZooKeys 883: 91-118. https://doi.org/10.3897/zookeys.883.37586
Figure 1 Poeciliopsis jackschultzi, CNP-IBUNAM 23406, holotype, male, 20.3 mm SL; Mexico, Sonora, Río Concepción.
Figure 11 from: Conway KW, Mateos M, Vrijenhoek RC (2019) A new species of the livebearing fish genus Poeciliopsis from northern Mexico (Cyprinodontiformes: Poeciliidae). ZooKeys 883: 91-118. https://doi.org/10.3897/zookeys.883.37586
Figure 11 Habitat of Poeciliopsis jackschultzia La Atascosa, small spring tributary to Alisos-Bambuto branch of the Río Concepción at highway 15 road crossing close to Rancho Semarnap, type locality (site D in Fig. 10, Table 4) b pool at Rancho Las Playas, tributary to Alisos-Bambuto branch (site F in Fig. 10, Table 4) c Río Concepción at (Cocospera-Babasac branch) at town of Imuris (site H in Fig. 10, Table 4).
Figure 3 from: Conway KW, Mateos M, Vrijenhoek RC (2019) A new species of the livebearing fish genus Poeciliopsis from northern Mexico (Cyprinodontiformes: Poeciliidae). ZooKeys 883: 91-118. https://doi.org/10.3897/zookeys.883.37586
Figure 3 Head of Poeciliopsis jackschultzi in dorsal, lateral and ventral view (CNP-IBUNAM 23406, holotype, male, 20.3 mm SL). Sensory troughs containing presumptive canal neuromasts outlined in red. Pores in cephalic lateral line sensory canals in green. Small white circles represent superficial neuromasts. White ovals represent presumptive canal neuromasts. Abbreviations: AN, anterior nostril; AST, anterior supraorbital trough; IOC, infraorbital canal; LT, lachrymal trough; MT, mandibular trough; NT, nasal trough; PN, posterior nostril; PopC, preopercular canal; PST, posterior supraorbital trough.
Figure 10 from: Conway KW, Mateos M, Vrijenhoek RC (2019) A new species of the livebearing fish genus Poeciliopsis from northern Mexico (Cyprinodontiformes: Poeciliidae). ZooKeys 883: 91-118. https://doi.org/10.3897/zookeys.883.37586
Figure 10 Distribution of sites (A-H) within the Río Concepción from which Poeciliopsis jackschultzi has been collected since 1981 (see Table 4). Type locality indicated by yellow star. Grey box in left inset figure indicates area presented in main figure. Right inset shows close up of area highlighted by white box. Extent of the Alisos Aquifer (also known as Rio Alisos Aquifer) is highlighted by a white line. The waste water treatment facility (PTAR Los Alisos) is indicated by a red polygon. The large commercial facility just north of the type locality is currently a Ganfer tomato greenhouse complex.
Data from: Analysis of expressed sequence tags from the placenta of the live-bearing fish Poeciliopsis (Poeciliidae)
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Data from: Sympatry predicts spot pigmentation patterns and female association behavior in the livebearing fish Poeciliopsis baenschi
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Genome annotation of the blackstripe livebearer Poeciliopsis prolifica, a placental Poeciliid for understanding fish placenta evolution
GEO Series GSE221844. Poeciliopsis prolifica. 16 samples. Type: Expression profiling by high throughput sequencing.
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