Primeiro registro de Chara indica e Chara zeylanica (Charophyceae, Charales, Characeae) em reservatórios do semiárido do estado do Rio Grande do Norte, Brasil

Silva, Gustavo Henrique Gonzaga da; Santos, Rafson Varela; Moura, Rodrigo Sávio Teixeira de; Bueno, Norma Catarina

doi:10.5007/2175-7925.2013v26n3p243

Cited by 4 publications

(4 citation statements)

References 10 publications

(3 reference statements)

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“…The basin includes 20 important reservoirs, all with water volumes above 5 mi m 3 , constructed for human uses, including agriculture [ 18 ]. The Santa Cruz of Apodi Reservoir (05°45′45′′ S and 37°48′00′′ W; Figure 2 ), in the Apodi/Mossoró basin, is classified as oligomesotrophic and has an area of 341.3 ha and the capacity to accumulate up to 600 million m 3 of water [ 19 ].…”

Section: Methodsmentioning

confidence: 99%

Effects of a Supraseasonal Drought on the Ecological Attributes ofPlagioscion squamosissimus(Heckel, 1840) (Pisces, Sciaenidae) in a Brazilian Reservoir

Souza

Oliveira

Peretti

et al. 2017

The Scientific World Journal

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The aim of this study was to evaluate the effect of a supraseasonal drought on the ecological attributes of Plagioscion squamosissimus. The fish were caught quarterly from February 2010 to November 2014 using gill nets in the reservoir of Santa Cruz, Rio Grande do Norte, Brazil. The abundance of the species was evaluated with the catch per unit effort (CPUE) metric and then correlated with the accumulated rainfall and water volume of the reservoir. The diet of the fish was evaluated using the feeding index (IAi). The proportional similarity index (PSi) was used to evaluate the variation in the niches of the fish. The body condition was inferred through the relative condition factor, and its variation was assessed with ANOVA. A reduction in the abundance of the species that were positively correlated with the reservoir water volume was observed. The diet of the fish comprised shrimp, gastropods, fish, insects, shrimp larvae, and vegetable matter, with shrimp being the major component. PSi showed the occurrence of individual specialization during November 2013 and November 2014. The relative condition factor was not correlated with a reduction in the water volume of the reservoir. The supraseasonal drought did not affect the relative condition factor, diet, and the trophic niche, but it did affect the species abundance.

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Section: Methodsmentioning

confidence: 99%

Effects of a Supraseasonal Drought on the Ecological Attributes ofPlagioscion squamosissimus(Heckel, 1840) (Pisces, Sciaenidae) in a Brazilian Reservoir

Souza

Oliveira

Peretti

et al. 2017

The Scientific World Journal

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“…According to Henry-Silva et al, (2013), sites 1 to 6 are in the lacustrine region of the reservoir, whereas points 7 and 8 are in the fluvial region. Sampling involved the use of gillnets with 12 to 70 mm mesh between adjacent knots; the nets were 15 m long and 1.8 to 2m high.…”

Section: Data Collectionmentioning

confidence: 99%

Fish assemblage in a semi-arid Neotropical reservoir: composition, structure and patterns of diversity and abundance

et al. 2014

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The aim of this study was to analyse the composition, structure and spatial and temporal patterns of diversity and abundance of the ichthyofauna of the Santa Cruz Reservoir in semi-arid Brazil. Data were collected quarterly at eight sampling locations on the reservoir between February 2010 and November 2011 using gillnets from 12-to 70-mm mesh that were left in the water for 12h00min during the night. We evaluated the composition, structure and assemblage descriptors (Shannon-Wiener diversity index and equitability, respectively) and catch per unit effort by the number (CPUEn) and biomass (CPUEb) of the ichthyofauna. The 6,047 individuals (399,211.6 g) captured represented three orders, ten families and 20 species, of which four belonged to introduced species. The family Characidae was the most abundant with a total of 2,772 (45.8%) individuals captured. The species-abundance curve fit the log-normal model. In the spatial analysis of diversity, there were significant differences between sampling sites in the lacustrine and fluvial regions, and the highest values were found in the lacustrine region. In the temporal analysis of diversity, significant differences were also observed between the rainy and dry seasons, and the higher values were found during the dry season. Equitability followed the same spatiotemporal pattern as diversity. The Spearman correlation was significantly negative between diversity and rainfall. A cluster analysis spatially separated the ichthyofauna into two groups: one group formed by sampling sites in the fluvial region and another group formed by the remainder of the points in the lacustrine region. Both the CPUEn and CPUEb values were higher at point 8 (fluvial region) and during the rainy season. A two-way ANOVA showed that the CPUEn and CPUEb values were spatially and temporally significant. We conclude that the spatial and temporal trends of diversity in the Santa Cruz reservoir differ from those of other Brazilian reservoirs but that the fish community composition and spatiotemporal patterns of abundance were similar.Keywords: transposition, São Francisco River, Eastern Northeast Atlantic Basin, Apodi/Mossoró River, dam. Assembleia de peixes de um reservatório no semiárido Neotropical: composição, estrutura e padrões de diversidade e abundância ResumoO objetivo desse trabalho foi analisar a composição, estrutura e os padrões espacial e temporal de diversidade e abundância da ictiofauna do reservatório de Santa Cruz, no semiárido brasileiro. As coletas ocorreram trimestralmente em oito pontos do reservatório entre fevereiro de 2010 e novembro de 2011, com rede de espera e malhas entre 12 a 70mm, expostas por 12h00min na água no período noturno. Foram analisados a composição, estrutura e os descritores da assembleia (índice de diversidade de Shannon-Wiener, equitabilidade), CPUEn (número) e CPUEb (biomassa) da ictiofauna. Foram capturados 6.047 indivíduos (399.211,6g) pertencentes a três ordens, 10 famílias e 20 espécies, sendo quatro espécies introduzidas. A família Characid...

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“…Opistobrânquios caracterizam-se pela perda parcial ou completa de suas conchas quando atingem a fase adulta, e pelo significativo processo de destorção da massa corpórea. Porém, a espécie Bulla striata é um dos poucos opistobrânquios que possuem concha ainda na fase adulta (Silva, 2011).…”

Section: Família Bullidaeunclassified

“…Essa espécie habita fundos de areia com lama da zona entre marés, até profundidades de 15m. Sua distribuição é bastante ampla, se estendendo desde a América do Norte até o sul do Atlântico, e no Brasil está presente em toda a costa (Rios, 1994;Silva, 2011). Além disso, B. striata é uma espécie herbívora, podendo utilizar este ambiente também como local para alimentação.…”

Section: Família Bullidaeunclassified

Diversidade de moluscos associados à alga parda do gênero Sargassum C. Agardh, 1820 em costões da Ilha de São Sebastião, litoral norte do Estado de São Paulo

Freitas¹,

Leite²

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The macrofauna associated with Sargassum species is relatively well known on the coast of São Paulo, in studies conducted mainly in continental shore areas. On the other hand, investigations on the molluscan fauna associated with Sargassum are still rare in Brazil and there are no studies comparing the composition and variation of molluscan communities associated with this brown alga in relation to continental and oceanic islands faces. Thus, in this study, we evaluated the composition, richness, diversity and geographic distribution of these communities, comparing areas facing the continent and open ocean areas on the Island of São Sebastião, São Paulo, to contribute with biodiversity knowledge. The biomass and size of Sargassum, as well epibiosis and species composition, varied between beaches and sampling periods, but showed no variation between island faces. Most molluscs occurred in the last sampling period, with higher temperatures, which may be a period of species recruitment. Furthermore, epibiosis proved to be very important for the establishment of associated molluscan species, and contributes to higher diversity. Overall, the collected species are commonly found in Sargassum beds, and were recorded in other studies. Most were small species or juveniles of large and sessile ones, suggesting that Sargassum beds play an important role in the early stages of development of molluscan species. These species may find better living conditions in these environments during their juvenile stages.

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Primeiro registro de Chara indica e Chara zeylanica (Charophyceae, Charales, Characeae) em reservatórios do semiárido do estado do Rio Grande do Norte, Brasil

Cited by 4 publications

References 10 publications

Effects of a Supraseasonal Drought on the Ecological Attributes ofPlagioscion squamosissimus(Heckel, 1840) (Pisces, Sciaenidae) in a Brazilian Reservoir

Effects of a Supraseasonal Drought on the Ecological Attributes ofPlagioscion squamosissimus(Heckel, 1840) (Pisces, Sciaenidae) in a Brazilian Reservoir

Fish assemblage in a semi-arid Neotropical reservoir: composition, structure and patterns of diversity and abundance

Diversidade de moluscos associados à alga parda do gênero Sargassum C. Agardh, 1820 em costões da Ilha de São Sebastião, litoral norte do Estado de São Paulo

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