Consulta: subjectFacets:"Perciformes"
Registros recuperados: 4
Data/hora: 10/06/2024 02:09:55

Genetic differentiation of Macrodon ancylodon (Sciaenidae, Perciformes) populations in Atlantic coastal waters of South America as revealed by mtDNA analysis
Provedor de dados: 74
Autores: Santos,Simôni; Schneider,Horacio; Sampaio,Iracilda.
The king weakfish (pescada-gó in Portuguese - Macrodon ancylodon (Sciaenidae), a demersal (bottom-feeding) species found in South America Atlantic coastal waters from the Gulf of Paria in Venezuela to Baia Blanca in Argentina, is an economically important species because of its abundance and wide acceptance by consumers. 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. Considering that this species represents an important economic resource, confirmation of whether M. ancylodon is a single species or there are different genetic stocks spread over its wide distribution would be an important contribution to conservation policies and population...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Macrodon ancylodon; Sciaenidae; Perciformes; 16S rRNA; Cytochrome b; Genetic differentiation.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572003000200008

Sciaenidae fish of the Caeté River estuary, Northern Brazil: mitochondrial DNA suggests explosive radiation for the Western Atlantic assemblage
Provedor de dados: 74
Autores: Vinson,Christina; Gomes,Grazielle; Schneider,Horacio; Sampaio,Iracilda.
Sciaenids are fish which are normally abundant in tropical estuaries of the western Atlantic. Studies on the Caeté river estuary in the northern Brazilian state of Pará have revealed that in this area Sciaenidae is the dominant family, comprising almost 50% of all teleosts sampled. In this paper we present the results of the first phylogenetic study on South American estuarine sciaenids, during which we obtained mitochondrial gene 16S sequences from 15 species belonging to eight genera occurring in the Caeté estuary. Intergeneric nucleotide divergences varied from 5 to 15%, Lonchurus and Menticirrhus being the most divergent lineages. Nucleotide divergences were quite variable amongst species of the same genus, ranging from 1.2% (Stellifer microps x...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Sciaenidae; Perciformes; Mitochondrial DNA; RRNA 16S; Caeté River estuary.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572004000200008

Larval development of the Mexican Snook, Centropomus poeyi (Teleostei: Centropomidae)
Provedor de dados: 83
Autores: Kubicek,Kole M.; Álvarez-González,Carlos Alfonso; Martínez-García,Rafael; Contreras-Sánchez,Wilfrido Miguel; Pohlenz,Camilo; Conway,Kevin W.
ABSTRACT We document for the first time the early ontogeny of Centropomus poeyi based on captive raised material representing 0-19 days posthatch (dph). The achievement of early developmental landmarks (i.e., yolk-sac depletion, flexion, development of fins) and changes in pigmentation are described (1.4 mm NL-10.6 mm SL; 0-19 dph) and documented for a subset of individuals using high quality photographs. The ontogeny of the viscerocranium is also described (2.4 mm NL-10.6 mm SL; 6-19 dph). Development in C. poeyi occurs over a short period with attainment of the juvenile stage (i.e., full complement of fin rays present in each fin) occurring by 6.9 mm SL. The ontogeny of external pigmentation in C. poeyi is marked by two trends throughout growth: (1) a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aquaculture; Morphology; Ontogeny; Perciformes; Viscerocranium.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252018000100204

The seasonal diet of Aequidens tetramerus (Cichlidae) in a small forest stream in the Machado River basin, Rondônia, Brazil
Provedor de dados: 36
Autores: COSTA,Igor David da; SOARES,Maiza Oliveira.
Trophic relationships in fish communities are affected by the availability of resources, which in turn is affected by spatial and temporal variations throughout the year. The aims of this study were to characterize the diet of A. tetramerus in a streamlet in the north of Brazil and compare its composition in different hydrological seasons (wet and dry seasons). Collections were performed every two months from October 2011 to September 2012 with the aid of seine nets, hand net and fishing traps in the streamlet located in the Machado River drainage basin in the Rondônia state. Most of the specimens collected were quite small (&lt; 40 mm) and had empty stomachs. Our results showed that A. tetramerus feeds on a wide variety of items of plant origin, such as...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fish; Perciformes; Amazon; Feeding habits; Ornamental fish.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672015000400365