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8 results for “Triportheidae”
FIGURE 6 in Early life history of two Neotropical Triportheidae fish (Characiformes)
FIGURE 6 | Illustrated summary of the identification key for Amazonian Triportheus larvae. Letters explain characters mentioned in the identification key. Scale bars = 1 mm.
FIGURE 4 in Early life history of two Neotropical Triportheidae fish (Characiformes)
FIGURE 4 | Early development of Triportheus angulatus: (A) preflexion early (4.53 mm SL); (B) preflexion late (5.00 mm SL); (C) flexion early (7.50 mm SL), (D) flexion late (9.61 mm SL), (E) postflexion early (11.59 mm SL), (F) postflexion late (13.73 mm SL), and (G) juvenile (21.69 mm SL). Scale bar = 1 mm.
FIGURE 3 in Early life history of two Neotropical Triportheidae fish (Characiformes)
FIGURE 3 | Body ratios (mm) between head length and snout length (A), eye diameter (B), and head depth (C), and standard length and body depth (D), head length (E), distance from snout to anal fin (F), distance from snout to dorsal fin (G), distance from snout to pectoral fin (H) and distance from snout to pelvic fin (I) during the early development of Triportheus albus.
FIGURE 1 in Early life history of two Neotropical Triportheidae fish (Characiformes)
FIGURE 1 | Map of the Eastern Amazon, showing the capture sites of the Triportheus used in the study. MSDR: Mamirauá Sustainable Development Reserve.
FIGURE 2 in Early life history of two Neotropical Triportheidae fish (Characiformes)
FIGURE 2 | Early development of Triportheus albus: (A) preflexion early (3.91 mm SL); (B) preflexion late (6.13 mm SL); (C) flexion early (7.01 mm SL), (D) flexion late (8.52 mm SL), (E) postflexion early (11.17 mm SL), (F) postlexion late (17.17 mm SL), and (G) juvenile (27.58 mm SL). Scale bar = 1 mm.
FIGURE 5 in Early life history of two Neotropical Triportheidae fish (Characiformes)
FIGURE 5 | Body ratios (mm) between snout length (A), head length and eye diameter (B), head depth (C), and standard length ratio (mm) between body depth (D), head length (E), distance from snout to anal fin (F), distance from snout to dorsal fin (G), distance from snout to pectoral fin (H) and distance from snout to pelvic fin (I) during the early development of Triportheus angulatus.
Data from: Highly conserved Z and molecularly diverged W chromosomes in the fish genus Triportheus (Characiformes, Triportheidae)
The main objectives of this study were to test: (1) whether the W-chromosome differentiation matches to species' evolutionary divergence (phylogenetic concordance) and (2) whether sex chromosomes share a common ancestor within a congeneric group. The monophyletic genus Triportheus (Characiformes, Triportheidae) was the model group for this study. All species in this genus so far analyzed have ZW sex chromosome system, where the Z is always the largest chromosome of the karyotype, whereas the W chromosome is highly variable ranging from almost homomorphic to highly heteromorphic. We applied conventional and molecular cytogenetic approaches including C-banding, ribosomal DNA mapping, comparative genomic hybridization (CGH) and cross-species whole chromosome painting (WCP) to test our questions. We developed Z- and W-chromosome paints from T. auritus for cross-species WCP and performed CGH in a representative species (T. signatus) to decipher level of homologies and rates of differentiation of W chromosomes. Our study revealed that the ZW sex chromosome system had a common origin, showing highly conserved Z chromosomes and remarkably divergent W chromosomes. Notably, the W chromosomes have evolved to different shapes and sequence contents within ~15–25 Myr of divergence time. Such differentiation highlights a dynamic process of W-chromosome evolution within congeneric species of Triportheus.
Data from: Highly conserved Z and molecularly diverged W chromosomes in the fish genus Triportheus (Characiformes, Triportheidae)
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