Distribution of planktonic microcrustaceans (Cladocera and Copepoda) in lentic and lotic environments from the semiarid region in northeastern Brazil

Abstract The present study aimed to inventory the biodiversity of planktonic microcrustaceans (Cladocera and Copepoda) in 44 environments from the semiarid region of Brazil, increasing the knowledge about zooplankton community, including phytophilous species. Between 2011 and 2017, organisms were collected in a non - systematic way in the states of Rio Grande do Norte, Pernambuco, Ceará and Paraíba. A total of 60 species of planktonic microcrustaceans were identified, of which 52 were cladocerans and eight were copepods. The basin that presented the highest richness was Pajeú River with 41 species. Nevertheless, the extrapolated number of species shows an increasing tendency for this basin. The genus composition was different between the basins, with Moxotó basin (Pernambuco) being isolated from the others, probably since lagoons were the only type of environment sampled in this basin. Richness and abundance patterns were higher for the basins where sampling was mainly performed in lentic environments, such as Pajeú and Moxotó. Microcrustacean inventories and long-term studies need to be conducted more frequently to better understand the biodiversity of continental aquatic ecosystems in the semiarid region of Brazil.

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Community Ecology of Stream Fishes: Concepts, Approaches, and Techniques

Community Ecology of Stream Fishes: Concepts, Approaches, and Techniques ◽

10.47886/9781934874141.ch21 ◽

2010 ◽

Keyword(s):

Fish Community ◽

Larval Fish ◽

Rank Order ◽

Food Resource ◽

Rio Grande ◽

Reproductive Phenology ◽

Comparative Genomic ◽

Spawning Cues ◽

Long Term Studies

<em>Abstract</em>.—Timing of reproduction differs among fish species in nearly all rivers, and reproductive phenology is predicted to strongly influence freshwater fish community structure in some systems. Despite its potential importance, few long-term studies of reproductive phenology in river fishes have been conducted in a community context. Here, we evaluated timing and sequence of reproduction of fishes in the Rio Grande, New Mexico over 9 years. Dates and rank order of first appearance of larvae varied among species and years, but three consistent spawning guilds were evident: early season, late season, and species that were intermediate in rank order of spawning. We hypothesized that appropriate reproductive timing enhanced recruitment to the extent that spawning cues predicted future availability of critical resources for larvae. Analysis of historical discharge records indicated that present and future discharge exhibited positive autocorrelation for up to 90 d. Likewise, larval fish densities were highest at moderate flows and coincident with high food resource abundance. However, stable isotope data for larval and adult fishes indicated considerable overlap in food resource use among larvae and adult fishes. There may be pressure for spawning time to converge among species to match the appearance of seasonal resources, but to diverge to lessen competition among young-of-year fishes in a classical trade-off scenario. More long-term studies are needed, and we propose that an integrated research program that combines detailed analysis of reproductive phenology, food web dynamics, and comparative genomic analyses could forge connections between environmental variation in spawning cues, recruitment success, and community assembly in river fishes. Such an integrated program could lead to better predictions about fish community responses to global warming, especially in vulnerable arid-land systems like the Rio Grande.

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The introduced snail Melanoides Tuberculatus (Muller, 1774) (Mollusca: Thiaridae) in aquatic ecosystems of the Brazilian Semiarid Northeast (Piranhas-Assu River basin, State of Rio Grande do Norte)

Brazilian Journal of Biology ◽

10.1590/s1519-69842010000100003 ◽

2010 ◽

Vol 70 (1) ◽

pp. 1-7 ◽

Cited By ~ 16

Author(s):

CM. Santos ◽

EM. Eskinazi-Sant'Anna

Keyword(s):

River Basin ◽

Aquatic Ecosystems ◽

Rio Grande ◽

Semiarid Region ◽

Aquatic Environments ◽

East African ◽

African Species ◽

Brazilian Semiarid ◽

Potential Impact

Records of the gastropod Melanoides tuberculatus (Müller, 1774), family Thiaridae, in the Piranhas-Assu River basin in Rio Grande do Norte reveal the dispersal of this native Southeast Asian and East African species into aquatic environments of the Brazilian semiarid region, including artificial environments (reservoirs) and lotic systems. The eutrophic conditions of the local waterbodies appear to favor the present situation, where this invasive species reaches extremely high densities, sometimes over 10,000 ind.m-2 as in Armando Ribeiro Gonçalves Reservoir. These observations indicate the immediate need for new studies on the spatial distribution of the species and its potential impact on the biodiversity and water quality of the waterbodies of the semiarid region of the state. Implantation of regular and systematic monitoring of the aquatic resources of the region is urgently required.

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Aquatic macrophytes of Northeastern Brazil: checklist, richness, distribution and life forms [with erratum]

Check List ◽

10.15560/9.2.298 ◽

2013 ◽

Vol 9 (2) ◽

pp. 298 ◽

Cited By ~ 11

Author(s):

Edson Gomes de Moura-Júnior ◽

Liliane Ferreira Lima ◽

Simone Santos Lira Silva ◽

Raíssa Maria Sampaio de Paiva ◽

Fernando Alves Ferreira ◽

...

Keyword(s):

Aquatic Ecosystems ◽

Aquatic Macrophytes ◽

Great Influence ◽

Rio Grande ◽

Life Forms ◽

Northeastern Brazil ◽

Structure And Dynamics ◽

Aquatic Flora ◽

Bibliographic Search ◽

High Species Richness

Aquatic plants have great influence on the structure and dynamics of aquatic ecosystems, thereby contributing considerably to biodiversity. In Brazil, knowledge of the biodiversity of aquatic macroflora is still limited. We present a checklist of aquatic macrophytes occurring in the northeastern region of Brazil through a bibliographic search. We recorded a total of 412 species, 217 genera and 72 families. The most representative families were Cyperaceae (70 species), Poaceae (38), Fabaceae (27) and Asteraceae (20). The States with highest number of species were Pernambuco (370), Bahia (360), Ceará (267) and Paraíba (261). The best-represented life forms were amphibious (193 species) and emergent (100). The aquatic flora of Northeastern Brazil exhibits high species richness; however, there is a scarcity of records of aquatic macrophytes for the States of Alagoas, Rio Grande do Norte, Maranhão, Sergipe and Piauí.

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Fruit flies (Diptera: Tephritidae) in commercial mango orchards in a semiarid region of Brazil

Revista Brasileira de Fruticultura ◽

10.1590/0100-29452019347 ◽

2019 ◽

Vol 41 (5) ◽

Cited By ~ 1

Author(s):

Márcia Mayara de Sousa ◽

Elton Lucio Araujo ◽

Janisete Gomes Silva ◽

Douglas Rafael Silva Barbosa ◽

Elania Clementino Fernandes

Keyword(s):

Mangifera Indica ◽

Rio Grande ◽

Fruit Fly ◽

Fruit Flies ◽

Northeastern Brazil ◽

Semiarid Region ◽

Semiarid Environment ◽

Predominant Species ◽

Corn Protein ◽

The World

Abstract Fruit flies (Diptera: Tephritidae) are important mango (Mangifera indica L.) pests in several parts of the world. Therefore, the main objective of this study was to know the species of fruit flies associated with commercial mango orchards in a semiarid region of Rio Grande do Norte state, Brazil; report the species of quarantine importance; discuss the influence of the semiarid environment on the distribution of the species and verify their faunistic indices. The study was carried out between July 2011 and June 2014 in ten commercial orchards of mango cultivar Tommy Atkins in the semiarid region of the state of Rio Grande do Norte, Northeastern Brazil. Fruit flies were captured in McPhail traps baited with 5% hydrolyzed corn protein (Bio Anastrepha®). Mangoes fruits were also collected. Faunistic analysis was performed to characterize the populations. Eight fruit fly species (Anastrepha spp. and C. capitata) were captured. The species C. capitata had the highest geographic distribution and was the only one to infest mangoes. The faunistic analysis showed that most of the orchards had low species richness and that C. capitata was the most frequent and predominant species.

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Monitoring meteorological drought in a semiarid region using two long-term satellite-estimated rainfall datasets: A case study of the Piranhas River basin, northeastern Brazil

Atmospheric Research ◽

10.1016/j.atmosres.2020.105380 ◽

2021 ◽

Vol 250 ◽

pp. 105380

Author(s):

Célia Soares de Brito ◽

Richarde Marques da Silva ◽

Celso Augusto Guimarães Santos ◽

Reginaldo Moura Brasil Neto ◽

Victor Hugo Rabelo Coelho

Keyword(s):

River Basin ◽

Meteorological Drought ◽

Northeastern Brazil ◽

Semiarid Region

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Spatial and seasonal variation of zooplankton assemblages in two tidal control structures in Northeastern Brazil

Research Society and Development ◽

10.33448/rsd-v10i12.20062 ◽

2021 ◽

Vol 10 (12) ◽

pp. e137101220062

Author(s):

Yago Bruno Silveira Nunes ◽

Ladilson Rodrigues Silva ◽

Amanda Lorena Lima Oliveira ◽

Marina Bezerra Figueiredo

Keyword(s):

Aquatic Ecosystems ◽

Sampling Site ◽

Zooplankton Community ◽

Temporal Variations ◽

Northeastern Brazil ◽

Control Structures ◽

Abiotic Parameters ◽

Spatial And Seasonal Variation ◽

Zooplankton Communities

Zooplankton is a group of organisms that can help to understand the quality of aquatic ecosystems, as they are responsible for transforming energy matter, thus making it available to other links, making them important in aquatic trophodynamics. This study analyzed spatial and temporal variations in zooplankton communities found in two tidal control structures on Ilha do Maranhão, northeastern Brazil. Sampling took place from September 2017 to July 2018. Abiotic parameters (temperature, salinity, and transparency) and plankton samples were recorded monthly throughout the study period at each sampling site. The results found for the abiotic parameters showed a well-defined pattern, with a clear division between the dry and rainy periods. Forty taxa represented the zooplankton community of the São Luís tidal control structure, and from São José de Ribamar by 21 taxa, represented mainly by copepods, ichthyoplankton, foraminifera, polychaetes, and mollusks. The analysis of ecological indices of richness, evenness, and diversity showed a difference in the distribution of organisms among the study areas. We identified an important influence of the physicochemical parameters on the zooplankton communities of São Luís and São José de Ribamar, according to the statistical analyzes used in this study.

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First record of Scartella itajobi Rangel and Mendes, 2009 (Perciformes: Blenniidae) from São Pedro e São Paulo Archipelago, Brazil

Check List ◽

10.15560/7.5.599 ◽

2011 ◽

Vol 7 (5) ◽

pp. 599 ◽

Cited By ~ 1

Author(s):

Paulo Augusto De Lima Filho ◽

Rodrigo Xavier Soares ◽

Wagner Franco Molina ◽

Liana De Figueiredo Mendes

Keyword(s):

Fish Species ◽

Species Distribution ◽

Rio Grande ◽

First Record ◽

Sao Paulo ◽

Northeastern Brazil ◽

São Paulo ◽

Number Of Species ◽

Fernando De Noronha ◽

Endemic Fish

This article presents the first record of the blenniid Scartella itajobi in the São Pedro e São Paulo Archipelago, located off the state of Rio Grande do Norte, northeastern Brazil. As a result, the species distribution is extended 610 km northeast. The number of species of Blenniidae known to occur in São Pedro e São Paulo Archipelago is three, whereas the number of endemic fish species shared by São Pedro e São Paulo, Fernando de Noronha, and Rocas Atoll now stands at two.

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Assessment of the aerial behaviors of humpback whales, Megaptera novaeangliae (Borowski, 1781), in coastal areas in Northeastern Brazil

Revista Brasileira de Zoociências ◽

10.34019/2596-3325.2017.v18.24652 ◽

2017 ◽

Vol 18 (3) ◽

Author(s):

Guilherme Maricato ◽

Liliane Ferreira Lodi ◽

Daniela Rodrigues Abras

Keyword(s):

Communication System ◽

Coastal Areas ◽

Megaptera Novaeangliae ◽

Northeastern Brazil ◽

Humpback Whales ◽

Behavioral Repertoire ◽

Long Term Studies

The aim of this study was to analyze the aerial behaviors of humpback whales (Megaptera novaeangliae) in Northeastern Brazil. From July to October 2013, 113 groups, totaling 272 individuals (x̄ = 2.41; ± 1.52), were observed, including possible double counts. Groups consisting of more than three individuals showed a significantly higher level of aerial behaviors (χ² = 0.03) and a more varied aerial behavioral repertoire (χ² = 0.00) compared to smaller groups. No significant differences in aerial behaviors were found in relation to month (χ² = 0.74), the presence of calves in groups (χ² = 0.14) or depth (χ² = 0.54). Long-term studies can provide valuable information about sociality in humpback whales since their communication system is not limited to sound and can differ according to the environment.

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Equine coital exanthema caused by equid alphaherpesvirus 3: a report of an outbreak in northeastern Brazil

Pesquisa Veterinária Brasileira ◽

10.1590/1678-5150-pvb-6877 ◽

2021 ◽

Vol 41 ◽

Author(s):

Givaldo B. Silva Filho ◽

Hisadora A.S.C Bom ◽

Silvio M.C. Fonseca ◽

Érica A. Costa ◽

Beatriz S.A.S. Santos ◽

...

Keyword(s):

Infectious Disease ◽

Oral Cavity ◽

Molecular Diagnosis ◽

Clinical Signs ◽

Rio Grande ◽

The State ◽

Northeastern Brazil ◽

Semiarid Region ◽

Blood Samples ◽

Northeastern Region

ABSTRACT: Equine coital exanthema is a venereal infectious disease poorly reported in horses in Brazil and was never described in the northeastern region of the country. This work aims to describe the clinical and pathological aspects of an outbreak of equine coital exanthema caused by equid alphaherpesvirus 3, occurred in a herd of horses at the semiarid region of the State of Rio Grande do Norte. Main clinical signs consisted of anorexia, hiporexia, fibrinous or purulent secretion in the penis mucosa and vagina. Two mares presented mild to minimal lesions that consisted of scars in the mucosa of the vagina and in the perivulvar region. In a stallion the disease consisted of severe, multifocal, umbilicated-exanthematous ulcers of approximately 1cm in diameter on the penis mucosa. Other areas where ulcers and crusts were focally observed included the skin of the scrotum and on the lips and mucocutaneous junctions of the oral cavity. Histologically, the main lesion consisted of multifocal severe ulcerative and fibrinous necrotizing balanoposthitis and mild multifocal necrotizing, lymphocytic dermatitis in the lips and scrotum. The equide alphaherpesvirus 3 DNA was amplified in blood samples and penis mucosa using the PCR technique. This is the first report of molecular diagnosis of equine coital exanthema affecting horses in northeastern Brazil. Further studies should be carried out in order to investigate the epidemiology and the importance of this herpetic disease in the country.

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Simplified Method for the Assessment of Siltation in Semiarid Reservoirs Using Satellite Imagery

Water ◽

10.3390/w11050998 ◽

2019 ◽

Vol 11 (5) ◽

pp. 998

Author(s):

José Wellington Batista Lopes ◽

José Carlos de Araújo

Keyword(s):

Water Availability ◽

Northeastern Brazil ◽

Survey Method ◽

Semiarid Region ◽

Morphological Parameters ◽

Bathymetric Survey ◽

Brazilian Semiarid ◽

Simplified Method ◽

Sampling Points

The Brazilian semiarid region strongly depends on superficial reservoirs (one every 5 km 2 ) and hence is subject to the deleterious effects of siltation, which reduces water availability. This research proposed a method, simplified bathymetric surveying using remote sensing, for updating the morphological parameters of reservoirs. The study area was the Pentecoste reservoir (360 hm 3 ) in northeastern Brazil. The results were compared to the conventional bathymetric survey method, which demands more sampling points (235 compared to 1) and was assumed as reference. Siltation assessed through the proposed method was nearly twice as high as that observed through conventional surveys. The morphological parameters derived by both methods were used to assess the long-term water balance of the reservoir. The results show that the outflow diverged 30%, while the evaporated discharge and water availability diverged 10% between the methods. Therefore, in the conditions of the Brazilian semiarid region, the simplified method suffices to assess the water availability of reservoirs affected by silting.

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