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18 results for “zooplanktivores”
Fig. 5 in Spatial patterns of zooplanktivore Chirostoma species (Atherinopsidae) during water-level fluctuation in the shallow tropical Lake Chapala, Mexico: seasonal and interannual analysis
Fig. 5. (left column) Distribution-based Redundancy Analysis (db-RDA) ordination diagram of Lake Chapala with environmental variables (thick arrows), atherinopsids species (italic letters), sampling sites (numbers), and principal coordinates axes (thin arrows) at dry season (a: May of 1999) and rainy season (b: August of 1999; c: 2000). The fish are: jordani = Chirostoma jordani; consocium = Chirostoma consocium; labarcae = Chirostoma labarcae. The environmental variables are: Temp = temperature, DO = dissolved oxygen, Sal = salinity. In figure 5c shallow sites are in italic and deep sites in regular.
Fig. 3 in Spatial patterns of zooplanktivore Chirostoma species (Atherinopsidae) during water-level fluctuation in the shallow tropical Lake Chapala, Mexico: seasonal and interannual analysis
Fig. 3. GAM results for May and August of site influence on fish density to show differential distribution of species in Lake Chapala. a: Chirostoma jordani; b: Chirostoma consocium; c: Chirostoma labarcae. Circles represent the residuals. Spline fit (solid line) is bound by 95% confidence intervals (dotted lines).
Fig. 2 in Spatial patterns of zooplanktivore Chirostoma species (Atherinopsidae) during water-level fluctuation in the shallow tropical Lake Chapala, Mexico: seasonal and interannual analysis
Fig. 2. GAM results for May of environmental characteristics influence on fish density. a: effect of depth (m) on Chirostoma jordani; b: effect of temperature (°C) on C. jordani; c: effect of salinity on C. consocium. Circles represent the residuals. Spline fit (solid line) is bound by 95% confidence intervals (dotted lines).
Fig. 1 in Spatial patterns of zooplanktivore Chirostoma species (Atherinopsidae) during water-level fluctuation in the shallow tropical Lake Chapala, Mexico: seasonal and interannual analysis
Fig. 1. Map of Lake Chapala, Mexico. Numbers in bold represent sample sites and numbers in italic lake depths.
Fig. 1 in Trophic interactions among sympatric zooplanktivorous fish species in volume change conditions in a large, shallow, tropical lake
Fig. 1. Lake Chapala, Mexico. Numbers in bold represent the sampling sites, in italics depths contours (m).
Fig. 4 in Spatial patterns of zooplanktivore Chirostoma species (Atherinopsidae) during water-level fluctuation in the shallow tropical Lake Chapala, Mexico: seasonal and interannual analysis
Fig. 4. GAM results for May of species correlation influence on fish density. a: effect of Chirostoma jordani on C. consocium; b: effect of C. jordani on C. labarcae; c: effect of C. labarcae on C. consocium. Circles represent the residuals. Spline fit (solid line) is bound by 95% confidence intervals (dotted lines).
Figure 4 from: de Zeeuw M, Westbroek I, van Oijen M, Witte F (2013) Two new species of zooplanktivorous haplochromine cichlids from Lake Victoria, Tanzania. ZooKeys 256: 1-34. https://doi.org/10.3897/zookeys.256.3871
Figure 4 - Live colours of Haplochromis argens sp. n. A sexually active ♂, 59.3 mm SL (paratype, RMNH.PISC.83622), Emin Pasha Gulf B sexually active ♂, 72.1 mm SL (paratype, RMNH.PISC.84067), Mwanza Gulf.
Figure 7 from: de Zeeuw M, Westbroek I, van Oijen M, Witte F (2013) Two new species of zooplanktivorous haplochromine cichlids from Lake Victoria, Tanzania. ZooKeys 256: 1-34. https://doi.org/10.3897/zookeys.256.3871
Figure 7 - Skeletal elements of Haplochromis goldschmidti sp. n. A Right premaxilla, lateral view (RMNH.PISC.83695) B Right lower jaw, lateral view (RMNH.PISC.83695) C Lower pharyngeal element, dorsal view (RMNH.PISC.83701) D Lower pharyngeal element, lateral view (RMNH.PISC.83701). Scale bars equal 1 mm. Drawn by I. Westbroek.
Figure 1 from: de Zeeuw M, Westbroek I, van Oijen M, Witte F (2013) Two new species of zooplanktivorous haplochromine cichlids from Lake Victoria, Tanzania. ZooKeys 256: 1-34. https://doi.org/10.3897/zookeys.256.3871
Figure 1 - Tanzanian part of Lake Victoria. A, distribution of Haplochromis argens sp. n.(hatched area) B Mwanza Gulf with catch localities of type specimens of Haplochromis argens sp. n.(hatched area); E to J represent stations along the research transect where data on abundance of Haplochromis argens sp. n. were collected C Emin Pasha Gulf with catch localities of type specimens of Haplochromis argens sp. n. (filled circles) and type specimens of Haplochromis goldschmidti sp. n. (filledtriangles); open triangles indicate other catch localities of Haplochromis goldschmidti sp. n.
Figure 10 from: de Zeeuw M, Westbroek I, van Oijen M, Witte F (2013) Two new species of zooplanktivorous haplochromine cichlids from Lake Victoria, Tanzania. ZooKeys 256: 1-34. https://doi.org/10.3897/zookeys.256.3871
Figure 10 - Plots of taxonomic measurements as a function of standard length. Body depth (BD), preorbital width (POW), lower jaw width (LJW) and lachrymal width (LaW). Open circles - Haplochromis argens from the Mwanza Gulf (Mw); closed circles - Haplochromis argens from the Emin Pasha Gulf (EP); triangles - Haplochromis goldschmidti. Power curves determined from GLM parameter estimates, solid line - Haplochromis argens from the Mwanza Gulf; dotted line - Haplochromis argens from the Emin Pasha Gulf; dashed line - Haplochromis goldschmidti, long dashed line (POW) - Haplochromis argens from both locations (MW + EP).
Figure 3 from: de Zeeuw M, Westbroek I, van Oijen M, Witte F (2013) Two new species of zooplanktivorous haplochromine cichlids from Lake Victoria, Tanzania. ZooKeys 256: 1-34. https://doi.org/10.3897/zookeys.256.3871
Figure 3 - Skeletal elements of Haplochromis argens sp. n. A Right premaxilla, lateral view (RMNH.PISC.83705) B Right premaxilla, lateral (top) and occlusal (bottom) views (RMNH.PISC.83621), illustrating, for this species, a rare case of a posteriorly edentulous premaxilla C Right lower jaw, lateral view (RMNH.PISC.83697) D Lower pharyngeal element, dorsal view (RMNH.PISC. 83706) E Lower pharyngeal element, lateral view (RMNH.PISC.83706). Scale bars equal 1 mm. A, C, D drawn by I. Westbroek, B by M. van Oijen.
Figure 6 from: de Zeeuw M, Westbroek I, van Oijen M, Witte F (2013) Two new species of zooplanktivorous haplochromine cichlids from Lake Victoria, Tanzania. ZooKeys 256: 1-34. https://doi.org/10.3897/zookeys.256.3871
Figure 6 - Habitus of Haplochromis goldschmidti sp. n. ♂ (holotype, RMNH.PISC.83573). Scale bar equals 10 mm. Drawing by I. Westbroek, missing (= dotted) scales added by M. van Oijen.
Figure 2 from: de Zeeuw M, Westbroek I, van Oijen M, Witte F (2013) Two new species of zooplanktivorous haplochromine cichlids from Lake Victoria, Tanzania. ZooKeys 256: 1-34. https://doi.org/10.3897/zookeys.256.3871
Figure 2 - Habitus of Haplochromis argens sp. n. ♂ (holotype, RMNH.PISC.83588). Scale bar equals 10 mm. Drawing by I. Westbroek, missing (= dotted) scales added by M. van Oijen.
Figure 5 from: de Zeeuw M, Westbroek I, van Oijen M, Witte F (2013) Two new species of zooplanktivorous haplochromine cichlids from Lake Victoria, Tanzania. ZooKeys 256: 1-34. https://doi.org/10.3897/zookeys.256.3871
Figure 5 - Preserved colours of Haplochromis argens sp. n. ♂ 67.3 mm SL (holotype, RMNH.PISC.83588). Scale bar equals 10 mm.
Figure 9 from: de Zeeuw M, Westbroek I, van Oijen M, Witte F (2013) Two new species of zooplanktivorous haplochromine cichlids from Lake Victoria, Tanzania. ZooKeys 256: 1-34. https://doi.org/10.3897/zookeys.256.3871
Figure 9 - Preserved colours of Haplochromis goldschmidti sp. n. ♂ 60.3 mm SL (holotype, RMNH.PISC.83573). Scale bar equals 10 mm.
Figure 8 from: de Zeeuw M, Westbroek I, van Oijen M, Witte F (2013) Two new species of zooplanktivorous haplochromine cichlids from Lake Victoria, Tanzania. ZooKeys 256: 1-34. https://doi.org/10.3897/zookeys.256.3871
Figure 8 - Live colours of Haplochromis goldschmidti sp. n. A sexually active ♂, 53.6 mm SL (paratype, RMNH.PISC.80480) B sexually active ♂, 57.5 mm SL (paratype, RMNH.PISC.83575).
Data from: 18S rRNA V9 metabarcoding for diet characterization: a critical evaluation with two sympatric zooplanktivorous fish species
The potential of the 18S rRNA V9 metabarcoding approach for diet assessment was explored using MiSeq paired-end (PE; 2 × 150 bp) technology. To critically evaluate the method′s performance with degraded/digested DNA, the diets of two zooplanktivorous fish species from the Bay of Biscay, European sardine (Sardina pilchardus) and European sprat (Sprattus sprattus), were analysed. The taxonomic resolution and quantitative potential of the 18S V9 metabarcoding was first assessed both in silico and with mock and field plankton samples. Our method was capable of discriminating species within the reference database in a reliable way providing there was at least one variable position in the 18S V9 region. Furthermore, it successfully discriminated diet between both fish species, including habitat and diel differences among sardines, overcoming some of the limitations of traditional visual-based diet analysis methods. The high sensitivity and semi-quantitative nature of the 18S V9 metabarcoding approach was supported by both visual microscopy and qPCR-based results. This molecular approach provides an alternative cost and time effective tool for food-web analysis.
Data from: 18S rRNA V9 metabarcoding for diet characterization: a critical evaluation with two sympatric zooplanktivorous fish species
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