Synopsis of the fishes of the great lakes of Nicaragua

Meek, Seth Eugene

doi:10.5962/bhl.title.3761

Cited by 24 publications

(19 citation statements)

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“…North to south: Lake Catemaco, in the Papaloapan basin Mexico; Lake Ocotalito and the Lacanjá river in the Usumacinta basin, Mexico; Lake Managua (also known as Xolotlán) in the San Juan basin Nicaragua and Lake Nicaragua (also known as Cocibolca) in the San Juan basin, Nicaragua (Table S1). These sympatric morphs correspond to different nominal species, four species originally assigned to the genus “ Bramocharax ”: “ B. caballeroi ” (Contreras‐Balderas & Rivera‐Teillery, ) from Lake Catemaco, Veracruz, México; Astyanax ocotal (considered “ Bramocharax ”‐like based on morphology; Schmitter‐Soto, ; Valdez‐Moreno, Contreras‐Balderas, & Contreras‐Balderas, ) from Lake Ocotalito, Chiapas, México; “ B. elongatus ” (Meek, ) a synonym of “ B. bransfordii ” (Gill & Bransford, ) from Lake Managua; and “ B. bransfordii ” from Lake Nicaragua and the Sarapiquí River San Juan System, Nicaragua, and Costa Rica. We also evaluated three sympatric species assigned to the genus Astyanax: A. aeneus (Günther, 1860) from Lake Catemaco and Lake Ocotalito ( sensu Ornelas‐García et al, ); A. nasutus (Meek, ) from Lake Managua; and A. nicaraguensis (Eigenmann & Ogle, ) from Lake Nicaragua and the Sarapiquí River.…”

Section: Methodsmentioning

confidence: 99%

Section: Specimen Collectionmentioning

confidence: 98%

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A geographical cline in craniofacial morphology across populations of Mesoamerican lake‐dwelling fishes

et al. 2020

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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.

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Section: Methodsmentioning

confidence: 99%

Section: Specimen Collectionmentioning

confidence: 98%

A geographical cline in craniofacial morphology across populations of Mesoamerican lake‐dwelling fishes

et al. 2020

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“…Historically, the Lake Nicaragua-San Juan River-Colorado River system, in Nicaragua and Costa Rica, was of particular importance for P. pristis and the species was recorded from that system in several studies (Gill and Bransford, 1877;Meek, 1907;Marden, 1944;Bigelow and Schroeder, 1953;Thorson, 1982b). However, neither historical nor modern records were found from the Atlantic coast or drainages in Nicaragua, other than the records of Lake Nicaragua and San Juan River system (Montoya and Thorson, 1982;H.…”

Section: Mexico and Central Americamentioning

confidence: 99%

Status and the potential for extinction of the largetooth sawfish Pristis pristis in the Atlantic Ocean

Fernandez‐Carvalho

Imhoff

Faria

et al. 2013

Aquatic Conservation

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Sawfishes currently are among the most threatened elasmobranchs in the world. Only two species inhabit Atlantic waters: the largetooth sawfish (Pristis pristis) and the smalltooth sawfish (Pristis pectinata), both having suffered dramatic declines in their ranges. The goal of this study was to evaluate the status of P. pristis in the Atlantic, and estimate local extinction risk based on historical and recent occurrence records. In order to accomplish these goals, a thorough search for historical and recent records of P. pristis in the Atlantic was conducted, by reviewing scientific and popular literature, museum specimens, and contacting regional scientists from the species’ historical range. In total, 801 P. pristis records (1830–2009) document its occurrence in four major regions in the Atlantic: USA (n = 41), Mexico and Central America (n = 535), South America (n = 162), and West Africa (n = 48). Locality data were not available for 15 records. Historical abundance centres were the Colorado‐San Juan River system in Nicaragua and Costa Rica (and secondarily Lake Izabal of Guatemala), the Amazon estuary, and coastal Guinea‐Bissau. Currently, the species faces drastic depletion throughout its entire former range and centres of abundance. It appears to have been extirpated from several areas. The probability of extinction was highest in the USA, northern South America (Colombia to Guyane), and southern West Africa (Cameroon to Namibia). Currently, the Amazon estuary appears to have the highest remaining abundance of P. pristis in the Atlantic, followed by the Colorado–San Juan River system in Nicaragua and Costa Rica and the Bissagos Archipelago in Guinea Bissau. Therefore the protection of these populations is crucial for the preservation and recovery of the species. Copyright © 2013 John Wiley & Sons, Ltd.

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“…The shark is also mentioned in earlier catalogs or checklists of fish, which include Lake Nicaragua, by Eigenmann (1893Eigenmann ( , 1909, Jordan and Evermann (1896b), Meek (1907), Regan (1908), and Jordan, Evermann and Clark (1930), as well as in brief statements by Gill (1884Gill ( , 1893 and Smith (1893). The latter three references were in response to a statement by Hardman (1884) and an inquiry by Ames (1893) concerning the occurrence of elasmobranchs in freshwater.…”

Section: Introductionmentioning

confidence: 99%