Froese, R. and D. Pauly. Editors. (). FishBase. Macrodon ancylodon (Bloch & Schneider, ). Accessed through: World Register of Marine Species at. Macrodon ancylodon — Overview. Yellow Mouth Salmon Media. Image of Macrodon ancylodon. Macrodon ancylodon Trusted. Creative Commons. O pescada-foguete (Macrodon ancylodon) é uma espécie de pescada que pode ser encontrada da Venezuela à Argentina. Tais animais medem cerca de

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Wiktionary 0 entries edit. Mol Phylogenet Evol 7: How to cite this article.

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Mol Biol Evol Services on Demand Journal. This pattern of separation between the groups fits the type I phylogeographic pattern proposed in the recent classification by Anncylodon where the lines are defined by haplotype groups spatially separated by an effective barrier to genetic flow. Systema ichthyologiae iconibus CX illustratum Plate 25 Mol Dev Evol The levels of divergence found between tropical and subtropical M.

The degree of confidence for the groups on the maximum-parsimony tree was evaluated by bootstrap replicates Felsenstein, Porto Alegre, Brasil, pp The Animal Diversity Web is an educational resource written largely by and for college macrodonn.

This paper is contribution n. BMC Evol Biol 2: Mol Phylogenet Evol 9 1: The low divergence values which we found in the M.

Though we macrodpn our accounts for accuracy, we cannot guarantee all information in those accounts. Cladograms reflecting similarities between the populations were constructed using the distance matrix and maximum-parsimony techniques, deletions and insertions being treated as a fifth base in the parsimony analyses.


Only the cytochrome b gene was used in this type of analysis, the genetic distance matrix being obtained using the method of Tamura and Nei and the geographic distance matrix constructed by transforming the latitude of the geographic coordinates of the sample points into kilometers, with the help of a program available on the site www.

Family Sciaenidae Drums or croakers. The results clearly show two genetically different groups which have mmacrodon divergence levels and genetic structuring patterns that suggest they may be different species, disagreeing with the traditional taxonomic system which allocates only one species to the genus Macrodon in the western Atlantic. In our work, the lack of geographic structuring in the Macrodon populations within each group is indicative of recent genetic flow. August 29, accepted: Saturation was not observed in the 16S rRNA sequences.

Because of its wide distribution, M. Phylogenetic analyses The two DNA segments studied maceodon not show any indication of saturation in their sequences, so that both could be used in the phylogenetic analyses.

Figure 2 shows 24 nucleotide sites 45, 46, 55,,,,,ancylodom, in the cytochrome b gene that can be clearly distinguished in the tropical and subtropical Macrodon groups.

The occupation of cooler macrodom environments may have caused the development of adaptation mechanisms to these environments and later isolation of tropical and subtropical populations. Geographic structuring could not be identified in the individual populations which make up the tropical and subtropical Macrodon groups based on the segments of the two genes analyzed because specimens collected from very distant localities presented identical nucleotide sequences.


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These results suggest that these two groups have already reached a stage of sufficient genetic differentiation to be considered as distinct species and not just as a single species for the western Atlantic, as is traditionally accepted in the current taxonomy based on morphological data. In marine environments the geographic structure of populations may be influenced by local environmental conditions and the life history of the species, hence the potential for species dispersal does not always predict the amount of gene flow between geographically separated populations Burton, ; Palumbi, A possible cause for the marked genetic differentiation of the tropical and subtropical Macrodon groups could be patterns of oceanic circulation caused by surface marine currents, e.

Biol J Linn Soc Lond Class Actinopterygii ray-finned fishes. Studies carried out in the tropical and subtropical regions of Brazil have shown that this species has distinct reproduction periods, December and February in the South Juras and Yamagguti, ; Yamaguti, ; Vazzoler, and July-August and October-December in the north Camargo-Zorro, Encyclopedia of Life ID. The Macrodon populations in the two groups probably developed mechanisms to adapt to the type of environment where they lived and this served as a barrier enhancing the geographical isolation of the populations.

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