Cerrar

No. de sistema: 000060044

LDR _ _ 00000nab^^22^^^^^za^4500
008 _ _ 200320m20209999xx^^r^p^o^^^^z0^^^a0eng^d
040 _ _ a| ECO
c| ECO
043 _ _ a| n-mx---
a| ncnq---
044 _ _ a| xx
245 0 2 a| A geographical cline in craniofacial morphology across populations of Mesoamerican lake-dwelling fishes
506 _ _ a| Disponible para usuarios de ECOSUR con su clave de acceso
520 1 _ a| Together, the complex geological history and climatic diversity of Mesoamerica create a rich source of biodiversity from which evolutionary processes can be studied. Here, we discuss highly divergent morphs of lake‐dwelling fishes distributed across Mexico and Central America, originally recognized as members of different genera (Astyanax and “Bramocharax”). Recent phylogenetic studies, however, suggest these morphs group within the same genus and readily hybridize. Despite genetic similarities, Bramocharax morphs exhibit stark differences in cranial shape and dentition. We investigated the evolution of several cranial traits that vary across morphs collected from four lakes in Mexico and Nicaragua and discovered an ecomorphological cline from northern to southern lakes. Northern populations of sympatric morphs exhibit a similar cranial shape and tooth morphology. Southern populations of Bramocharax morphs, however, showed a larger disparity in maxillary teeth, length and frequency of unicuspid teeth, an elongated snout, and a streamlined cranium compared to Astyanax morphs. This divergence of craniofacial morphology likely evolved in association with differences in trophic niches. We discuss the morphological differences across the four lake systems in terms of geological history and trophic dynamics. In summary, our study suggests that Bramocharax morphs are likely locally adapted members derived from independent Astyanax lineages, highlighting an interesting parallel evolutionary pattern within the Astyanax genus.
530 _ _ a| Disponible en línea
533 _ _ a| Reproducción electrónica en formato PDF
538 _ _ a| Adobe Acrobat profesional 6.0 o superior
650 _ 4 a| Peces
650 _ 4 a| Astyanax
650 _ 4 a| Bramocharax
650 _ 4 a| Dientes
650 _ 4 a| Variación morfológica
650 _ 4 a| Ecomorfología
651 _ 4 a| México
651 _ 4 a| Nicaragua
700 1 _ a| Powers, Amanda K.
e| autora
700 1 _ a| Garita Alvarado, Carlos A.
e| autor
700 1 _ a| Rodiles Hernández, María del Rocío
d| 1956-
e| autora
700 1 _ a| Berning, Daniel J.
e| autor
700 1 _ a| Gross, Joshua B.
e| autor
700 1 _ a| Ornelas García, Claudia Patricia
e| autora
773 0 _
t| Journal of Experimental Zoology. Part A: Ecological and Integrative Physiology
g| Vol. 333, no 3 (March 2020), p. 171-180
x| 2471-5646
900 _ _ a| Solicítelo con su bibliotecario/a
902 _ _ a| BG / MM
904 _ _ a| Marzo 2020
905 _ _ a| Artecosur
905 _ _ a| Biblioelectrónica
LNG eng
Cerrar
*Solicítelo con su bibliotecario/a
A geographical cline in craniofacial morphology across populations of Mesoamerican lake-dwelling fishes
Powers, Amanda K. (autora)
Garita Alvarado, Carlos A. (autor)
Rodiles Hernández, María del Rocío, 1956- (autora)
Berning, Daniel J. (autor)
Gross, Joshua B. (autor)
Ornelas García, Claudia Patricia (autora)
Nota: Disponible en línea
Disponible para usuarios de ECOSUR con su clave de acceso
Contenido en: Journal of Experimental Zoology. Part A: Ecological and Integrative Physiology. Vol. 333, no 3 (March 2020), p. 171-180. ISSN: 2471-5646
No. de sistema: 60044
Tipo: Artículo
PDF
  • Consulta (1)




Inglés

"Together, the complex geological history and climatic diversity of Mesoamerica create a rich source of biodiversity from which evolutionary processes can be studied. Here, we discuss highly divergent morphs of lake‐dwelling fishes distributed across Mexico and Central America, originally recognized as members of different genera (Astyanax and “Bramocharax”). Recent phylogenetic studies, however, suggest these morphs group within the same genus and readily hybridize. Despite genetic similarities, Bramocharax morphs exhibit stark differences in cranial shape and dentition. We investigated the evolution of several cranial traits that vary across morphs collected from four lakes in Mexico and Nicaragua and discovered an ecomorphological cline from northern to southern lakes. Northern populations of sympatric morphs exhibit a similar cranial shape and tooth morphology. Southern populations of Bramocharax morphs, however, showed a larger disparity in maxillary teeth, length and frequency of unicuspid teeth, an elongated snout, and a streamlined cranium compared to Astyanax morphs. This divergence of craniofacial morphology likely evolved in association with differences in trophic niches. We discuss the morphological differences across the four lake systems in terms of geological history and trophic dynamics. In summary, our study suggests that Bramocharax morphs are likely locally adapted members derived from independent Astyanax lineages, highlighting an interesting parallel evolutionary pattern within the Astyanax genus."


  • Adobe Acrobat profesional 6.0 o superior