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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Please see our brief essay. In our work, the lack of geographic structuring in the Macrodon populations within each group is indicative of recent genetic flow. Macrodon ancylodon King weakfish Facebook. Because of its wide distribution this fish may be subject to geographic isolation and this may have resulted in distinct populations along its coastal range.

Acknowledgments This paper is contribution n. Confused by a class within a class or an order within an order? The evidence presented in this paper indicates that the taxonomic status of Macrodon ancylodon should be revised, and that strategies for management and conservation of stocks from different regions of the Brazilian coast should take in consideration the results of the present investigation.

In the phylogenetic trees Figures 4 and 5the populations cannot be separated because individuals belonging to very distant geographical regions group together.

From a commercial point of view, M. In our study, we observed that there is marked geographic structuring in the genus Macrodon that diverges at the Brazilian northeast into two genetically distinct clades tropical and subtropical.

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Pomacentridae as determined by mitochondrial ribosomal DNA macroodn. According to some authors, population isolation can occur during strong alterations in environmental conditions, such as climatic changes and geological phenomena Stepien et al.

Similarly, Figure 3 shows the 11 diagnostic sites 4, 19, 30, 35, 93,,of the 16S rRNA gene which differentiate the two Macrodon groups.

These values are similar to results obtained in several other groups of fish Farias et al. The low nucleotide divergence values for the two genes are often observed in closely related taxa, our results with the cytochrome b gene being similar to population studies on fish such as Dicentrarchus labrax Allergruci et al.


According ancyloodn Brandini et al.

Macrodon ancylodon, King weakfish : fisheries

Isolation anchlodon the Macrodon populations According to Dawson et al. The low divergence values which we found in the M.

Introduction The family Sciaenidae contains about 70 genera and species and is an important world fish resource Nelson,this family being represented in South Atlantic waters by about 21 genera and 57 species, of which more than 30 are found along the Brazilian coast.

World Register of Marine Species.

The results clearly show two genetically different groups macrovon have nucleotide divergence levels and genetic structuring patterns that suggest they may be different species, disagreeing with the traditional taxonomic system which allocates only one species macroron the genus Macrodon in the western Atlantic. This pattern of separation between the groups fits the type I phylogeographic pattern proposed in the recent classification by Avise where the lines are defined by haplotype groups spatially separated by an effective barrier to genetic flow.

Correlation between genetic distance and geographic distance The Mantel clustering test, with permutations, was used to assess the correlation between the genetic distance and the geographic distance between populations Mantel, using the Genetix program 4. Mcarodon Biology Evol 15 The Animal Diversity Web online.

IUCN Red List of Threatened Species

The ADW Team gratefully acknowledges their support. Mitochondrial DNA has been extensively studied in fish and techniques based on mitochondrial DNA successfully applied to taxonomic questions, the well characterized cytochrome b gene having been particularly useful for the analysis of the relationship between recently diverged taxa such as populations and species Stepien and Kocher, as well as being one of the genes most studied in fish systematics and Perciformes phylogeography Roe et al.

Academic Press, USA, pp Based on morphometric traits, Yamaguti distinguished four M. Wikisource 0 entries edit. Phylogenetic analyses The two DNA segments studied did not show any indication of saturation in their sequences, so that both could be used in the phylogenetic analyses. Wikiversity 0 entries edit. Nucleotide divergence Tables 4 and 5 present the nucleotide divergence matrices constructed using the method of Tamura and Nei for the two segments analyzed in the present study.

Tables 4 and 5 present the nucleotide divergence matrices constructed using the method of Tamura and Nei for the two segments analyzed in the present study. Estimation of the number of nucleotide substitutions was conducted for both genes using the method of Tamura and Neithe parameter of the gamma distribution 0. Stepien has suggested that the barrier of warm water in the south of the Gulf of California is the cause of the isolation and consequent genetic divergence which occurs among spotted sand bass Paralabrax maculatofasicatus populations in the Gulf of California and the Pacific coast.


According to YamagutiM. Though we edit our accounts for accuracy, we cannot guarantee all information in those accounts. However, despite these meristic and morphometric findings genetic differentiation between M. 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, All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License.

According to the allopatric speciation model, temporary geographic isolation is required to form reproductive barriers Sturmbauer et al.

The occupation of cooler water environments may have caused the development of adaptation mechanisms to these environments and later isolation of tropical and subtropical populations. Services on Demand Journal. Wikibooks 0 entries edit. The Animal Diversity Web is an educational resource written largely by and for college students. ADW anncylodon cover all species in the world, nor does it include all the latest scientific information about organisms we describe.

Mol Biol Evol Superclass Gnathostomata jawed vertebrates. Sinauer Associates, Sunderland, Massachussets. The North Brazil current influences part of the northeastern and all the northern coast of Brazil as far as Venezuela, while the Brazil current influences part of the northeastern coast and the southeastern and southern coast of Brazil and some regions of the Argentinean coast Castro and Miranda, ; Brandini et al. The History and Formation of Species. Mol Phylogenet Evol 19 1: