Electrophoretic study on intraspecific variations and interspecific relationships of marine catfishes (Siluriformes, Ariidae) of Cananéia (São Paulo, Brazil): 2. Isozymes of skeletic muscle

Suzuki, Hikaru; Phan, Van Ngan

doi:10.1590/s0373-55241990000100006

Cited by 2 publications

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“…The lowest level of genetic variability was recorded for C. fuerthii, within the range of the values reported by Suzuki & Phan (1990) for the ariid fish of Brazil, in which the levels of expected heterozygosis vary from 0.0018 in Netuma barba (Lacépède, 1803) to 0.0887 in C. Spixii (Agassiz, 1829). The differences found may be due to the fact that these authors report only six polymorphic loci, while in this study polymorphism was detected in 17 alloenzymatic loci for the five analysed species.…”

Section: Discussionsupporting

confidence: 72%

Sistemática molecular de cinco especies de bagres de la familia Ariidae de México

Colín

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The systematics of the marine catfish of the family Ariidae is controversial because at the present time the number of species and genera in the family, or their relationships, remain uncertain. Phylogenetic relationships among five representative species of marine catfish of the family Ariidae from both the Pacific and the Atlantic coasts of Mexico were assessed by the analysis of the variability in 21 alloenzymatic loci, and by the comparison of the electrophoretic patterns of whole muscle proteins. Interspecific genetic divergence levels obtained by both electrophoretic methods showed a clear separation among the genera Cathorops, Bagre and Ariopsis, as well as in the studied species of Cathorops and Ariopsis, with Bagre marinus showing a greater genetic similarity with the Ariopsis group. Finally, our results contribute to the definition of the presence of this species in the coasts of the Gulf of Mexico

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Section: Discussionsupporting

confidence: 72%

Sistemática molecular de cinco especies de bagres de la familia Ariidae de México

Colín

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Karyotypes of three species of marine catfishes from Brazil

Gomes¹,

Phan²,

Passos³

1994

Braz. j. oceanogr.

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The chromosomes of three species of fishes belonging to the family Ariidae -Netuma barba, Genidens genidens and Amis parkeri - were studied after conventional Giemsa staining. All three species have a diploid chromosome number of 2n = 56. The karyotype comprises 18 metacentric (m), 18 submetacentric (sm), 18 subtelocentric (st) and 2 telocentric (t) pairs for N. barba; 12 m, 20 sm, 20 st and 41 pairs for G. genidens; 16 m, 16 sm, 22 st and 21 pairs for A. parkeri. The results obtained from these three species are compared with each other and with those found in literature.
Os cromossomos de 3 espécies de peixes da família Ariidae - Netuma barba, Genidens genidens e Arius parkeri - foram estudados após coloração convencional com Giemsa. As três espécies apresentaram número modal diplóide de 2n = 56. O cariótipo de N. barba compreende 18 pares de cromossomos metacentricos (m), 18 submetacêntricos (sm), 18 subtelocêntricos (st) e 2 telocêntricos (t); o de G. genidens compreende 12 pares m, 20 sm, 20 st e 41; o de A.parkeri compreende 16 m, 16 sm, 22 st e 2 t. Os resultados obtidos são comparados entre si e com os de outros ariídeos encontrados na literatura

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Electrophoretic study on intraspecific variations and interspecific relationships of marine catfishes (Siluriformes, Ariidae) of Cananéia (São Paulo, Brazil): 2. Isozymes of skeletic muscle

Cited by 2 publications

References 44 publications

Sistemática molecular de cinco especies de bagres de la familia Ariidae de México

Sistemática molecular de cinco especies de bagres de la familia Ariidae de México

Karyotypes of three species of marine catfishes from Brazil

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