Caracterização limnologicas e da pesca artesanal em um reservatório no semiárido tropical
Autor(a) principal: | |
---|---|
Data de Publicação: | 2016 |
Tipo de documento: | Tese |
Idioma: | por |
Título da fonte: | Repositório Digital da Universidade Federal Rural do Semi-Árido (RDU) |
Texto Completo: | https://repositorio.ufersa.edu.br/handle/tede/647 |
Resumo: | The influence of temporal and spatial gradients of the abiotic variables was evaluated in an artificial reservoir in tropical semi-arid region, located in the state of Rio Grande do Norte - BR. In relation to data on fisheries was held monthly during the course of one year (January 2012 to December 2012) through interviews with artisanal fishermen that use the reservoir as explored environment. Through the artisanal fishing landing, was sampled a total of 9932.65 kg fish, was parallel obeisant environmental data trying to find the relationship from entering the capture and environmental variables. Environmental variables were analyzed by Principal Component Analysis (PCA). The species caught in the reservoir were the peacock bass, tilapia, hake, curimatã and piau. The first two axes of the PCA explained 78.58% of the total variation of environmental data related to the reservoir. Axis 1 was positively influenced by pH, total dissolved solids (TDS), total N, total-P, and negatively influenced by dissolved oxygen (DO), temperature and precipitation. Once the first four variables (pH, total dissolved solids (TDS), total-N, total-P) presenting a high level of redundancy, the two variables with minor amounts (total N, P total) were excluded for further analysis. The transparency and conductivity were the variables that most influenced the Axis 2, while Chlorophyll, showed no interaction with any of the two axes. According to the CCA, the abiotic oxygen factors dissolved, electrical conductivity and temperature, favored the increase of the capture of species curimatã, tilapia and piau these more factors transparency favored catch hake while the pH and total dissolved solids favored the increase in the catch of the peacock bass. Thus the results demonstrate that the environmental variables influence the capture of the species composition in the reservoir during the study Santa Cruz. During the second study The survey data was conducted on a quarterly basis over the years 2011 to 2014. Sampling was carried out in eight points distributed in the reservoir. Environmental variables observed in the study showed no difference in the spatial distribution. However, when observed in the temporal sense of statistical analysis indicated difference between the years in the reservoir. The rainfall proved to be a determining factor in the temporal dynamics of abiotic variables in the reservoir of Santa Cruz, mainly temperature; pH; Dissolved oxygen; oxygen saturation; electrical conductivity and total dissolved solids. The reservoir of Santa Cruz, showed a trend of increase in total dissolved solids concentrations, high electrical conductivity and pH, characteristics that indicate eutrophication trend in this environment |
id |
UFER_71b16fcc25e64026c4422df38d42e572 |
---|---|
oai_identifier_str |
oai:repositorio.ufersa.edu.br:tede/647 |
network_acronym_str |
UFER |
network_name_str |
Repositório Digital da Universidade Federal Rural do Semi-Árido (RDU) |
repository_id_str |
|
spelling |
Caracterização limnologicas e da pesca artesanal em um reservatório no semiárido tropicalCharacterization limnological and artisan fishing in a reservoir in tropical semiaridVariáveis ambientaisPescaCapturaSanta CruzPluviometriaBalanço HídricoVariable environmentalFishingCatchSanta CruzRainfallWater balanceCNPQ::CIENCIAS AGRARIAS::MEDICINA VETERINARIAThe influence of temporal and spatial gradients of the abiotic variables was evaluated in an artificial reservoir in tropical semi-arid region, located in the state of Rio Grande do Norte - BR. In relation to data on fisheries was held monthly during the course of one year (January 2012 to December 2012) through interviews with artisanal fishermen that use the reservoir as explored environment. Through the artisanal fishing landing, was sampled a total of 9932.65 kg fish, was parallel obeisant environmental data trying to find the relationship from entering the capture and environmental variables. Environmental variables were analyzed by Principal Component Analysis (PCA). The species caught in the reservoir were the peacock bass, tilapia, hake, curimatã and piau. The first two axes of the PCA explained 78.58% of the total variation of environmental data related to the reservoir. Axis 1 was positively influenced by pH, total dissolved solids (TDS), total N, total-P, and negatively influenced by dissolved oxygen (DO), temperature and precipitation. Once the first four variables (pH, total dissolved solids (TDS), total-N, total-P) presenting a high level of redundancy, the two variables with minor amounts (total N, P total) were excluded for further analysis. The transparency and conductivity were the variables that most influenced the Axis 2, while Chlorophyll, showed no interaction with any of the two axes. According to the CCA, the abiotic oxygen factors dissolved, electrical conductivity and temperature, favored the increase of the capture of species curimatã, tilapia and piau these more factors transparency favored catch hake while the pH and total dissolved solids favored the increase in the catch of the peacock bass. Thus the results demonstrate that the environmental variables influence the capture of the species composition in the reservoir during the study Santa Cruz. During the second study The survey data was conducted on a quarterly basis over the years 2011 to 2014. Sampling was carried out in eight points distributed in the reservoir. Environmental variables observed in the study showed no difference in the spatial distribution. However, when observed in the temporal sense of statistical analysis indicated difference between the years in the reservoir. The rainfall proved to be a determining factor in the temporal dynamics of abiotic variables in the reservoir of Santa Cruz, mainly temperature; pH; Dissolved oxygen; oxygen saturation; electrical conductivity and total dissolved solids. The reservoir of Santa Cruz, showed a trend of increase in total dissolved solids concentrations, high electrical conductivity and pH, characteristics that indicate eutrophication trend in this environment2017-04-03A influência dos gradientes temporal e espacial sobre as variáveis abióticas foi avaliada em um reservatório artificial no semiárido tropical, localizado no estado do Rio Grande do Norte – BR. Em relação aos dados sobre a pesca, foi realizado mensalmente durante o ciclo de um ano (janeiro de 2012 à dezembro de 2012), através de entrevistas com os pescadores artesanais que utilizam o reservatório como ambiente explorado. Através do desembarque da pesca artesanal, foi amostrado um total de 9.932,65 kg pescado, paralelamente foi mesurado os dados ambientais buscando encontrar a relação entrem à captura e variáveis ambientais. As variáveis ambientais foram analisadas através da Análise de Componentes Principais (ACP). As espécies capturadas no reservatório foram a tucunaré, tilápia, pescada, curimatã e piau. Os dois primeiros eixos da PCA, explicou 78,58% da variação total dos dados ambientais relacionados com o reservatório. Eixo 1 foi positivamente influenciado pelo pH, sólidos totais dissolvidos (STD), N-total, P-total, e influenciado negativamente por oxigênio dissolvido (OD), temperatura e precipitação. Uma vez que as quatro primeiras variáveis (pH, sólidos totais dissolvidos (STD), N-total, P-total) apresentando um alto nível de redundância, as duas variáveis com os menores valores (N-total, P-total) foram excluídos de análises posteriores. A transparência e condutividade foram as variáveis que mais influenciou o Eixo 2, enquanto que a Clorofila, não apresentou interação com nenhum dos dois eixos. De acordo com a CCA, os fatores abióticos oxigênio dissolvido, condutividade elétrica e temperatura, favoreceram o aumento da captura das espécies de curimatã, tilápia e piau, esses fatores mais a transparência favoreceram a captura da pescada, enquanto, o pH e sólidos totais dissolvidos favoreceu o aumento na captura do tucunaré. Desta forma os resultados demonstram que as variáveis ambientais influenciaram na composição da captura de espécies durante o estudo no reservatório de Santa Cruz. Durante o segundo estudo O levantamento dos dados foi realizado de forma trimestral ao longo dos anos de 2011 a 2014. As amostragens foram realizadas em oito pontos distribuídos no reservatório. As variáveis ambientais observadas no estudo não apresentou diferença na distribuição espacial. Entretanto, quando observado no sentido temporal a analise estatística indicou diferença entre os anos no reservatório. A precipitação pluviométrica revelou-se um fator determinante na dinâmica temporal das variáveis abióticas no reservatório de Santa Cruz, principalmente temperatura; pH; oxigênio dissolvido; saturação de oxigênio; condutividade elétrica e sólidos totais dissolvidos. O reservatório de Santa Cruz, demonstrou uma tendência de aumento nas concentrações de sólidos totais dissolvidos, elevação da condutividade elétrica e pH, características que indicam uma tendência de eutrofização deste ambienteUniversidade Federal Rural do Semi-ÁridoBrasilUFERSAPrograma de Pós-Graduação em Ciência AnimalCosta, Rodrigo Silva da92035116015http://lattes.cnpq.br/4362207798891727Novaes, José Luís Costa02114246760http://lattes.cnpq.br/259140609703206004428104405http://lattes.cnpq.br/4447622453638170Hazin, Humberto Gomes02120997446http://lattes.cnpq.br/9181022363673469Silva, Guelson Batista da74089820359http://lattes.cnpq.br/5034564286133439Lopes, Yuri Vinicius de Andrade2017-04-13T15:04:37Z2016-06-30info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/doctoralThesisapplication/pdfapplication/pdfLOPES, Yuri Vinicius de Andrade. Caracterização limnologicas e da pesca artesanal em um reservatório no semiárido tropical. 2016. 58 f. Tese (Doutorado) - Curso de Pós-graduação em Ciência Animal, Universidade Federal Rural do Semi-Árido, Mossoró, 2016.https://repositorio.ufersa.edu.br/handle/tede/647porCC-BY-SAinfo:eu-repo/semantics/openAccessreponame:Repositório Digital da Universidade Federal Rural do Semi-Árido (RDU)instname:Universidade Federal Rural do Semi-Árido (UFERSA)instacron:UFERSA2023-10-30T20:23:45Zoai:repositorio.ufersa.edu.br:tede/647Repositório Institucionalhttps://repositorio.ufersa.edu.br/PUBhttps://repositorio.ufersa.edu.br/server/oai/requestrepositorio@ufersa.edu.br || admrepositorio@ufersa.edu.bropendoar:2023-10-30T20:23:45Repositório Digital da Universidade Federal Rural do Semi-Árido (RDU) - Universidade Federal Rural do Semi-Árido (UFERSA)false |
dc.title.none.fl_str_mv |
Caracterização limnologicas e da pesca artesanal em um reservatório no semiárido tropical Characterization limnological and artisan fishing in a reservoir in tropical semiarid |
title |
Caracterização limnologicas e da pesca artesanal em um reservatório no semiárido tropical |
spellingShingle |
Caracterização limnologicas e da pesca artesanal em um reservatório no semiárido tropical Lopes, Yuri Vinicius de Andrade Variáveis ambientais Pesca Captura Santa Cruz Pluviometria Balanço Hídrico Variable environmental Fishing Catch Santa Cruz Rainfall Water balance CNPQ::CIENCIAS AGRARIAS::MEDICINA VETERINARIA |
title_short |
Caracterização limnologicas e da pesca artesanal em um reservatório no semiárido tropical |
title_full |
Caracterização limnologicas e da pesca artesanal em um reservatório no semiárido tropical |
title_fullStr |
Caracterização limnologicas e da pesca artesanal em um reservatório no semiárido tropical |
title_full_unstemmed |
Caracterização limnologicas e da pesca artesanal em um reservatório no semiárido tropical |
title_sort |
Caracterização limnologicas e da pesca artesanal em um reservatório no semiárido tropical |
author |
Lopes, Yuri Vinicius de Andrade |
author_facet |
Lopes, Yuri Vinicius de Andrade |
author_role |
author |
dc.contributor.none.fl_str_mv |
Costa, Rodrigo Silva da 92035116015 http://lattes.cnpq.br/4362207798891727 Novaes, José Luís Costa 02114246760 http://lattes.cnpq.br/2591406097032060 04428104405 http://lattes.cnpq.br/4447622453638170 Hazin, Humberto Gomes 02120997446 http://lattes.cnpq.br/9181022363673469 Silva, Guelson Batista da 74089820359 http://lattes.cnpq.br/5034564286133439 |
dc.contributor.author.fl_str_mv |
Lopes, Yuri Vinicius de Andrade |
dc.subject.por.fl_str_mv |
Variáveis ambientais Pesca Captura Santa Cruz Pluviometria Balanço Hídrico Variable environmental Fishing Catch Santa Cruz Rainfall Water balance CNPQ::CIENCIAS AGRARIAS::MEDICINA VETERINARIA |
topic |
Variáveis ambientais Pesca Captura Santa Cruz Pluviometria Balanço Hídrico Variable environmental Fishing Catch Santa Cruz Rainfall Water balance CNPQ::CIENCIAS AGRARIAS::MEDICINA VETERINARIA |
description |
The influence of temporal and spatial gradients of the abiotic variables was evaluated in an artificial reservoir in tropical semi-arid region, located in the state of Rio Grande do Norte - BR. In relation to data on fisheries was held monthly during the course of one year (January 2012 to December 2012) through interviews with artisanal fishermen that use the reservoir as explored environment. Through the artisanal fishing landing, was sampled a total of 9932.65 kg fish, was parallel obeisant environmental data trying to find the relationship from entering the capture and environmental variables. Environmental variables were analyzed by Principal Component Analysis (PCA). The species caught in the reservoir were the peacock bass, tilapia, hake, curimatã and piau. The first two axes of the PCA explained 78.58% of the total variation of environmental data related to the reservoir. Axis 1 was positively influenced by pH, total dissolved solids (TDS), total N, total-P, and negatively influenced by dissolved oxygen (DO), temperature and precipitation. Once the first four variables (pH, total dissolved solids (TDS), total-N, total-P) presenting a high level of redundancy, the two variables with minor amounts (total N, P total) were excluded for further analysis. The transparency and conductivity were the variables that most influenced the Axis 2, while Chlorophyll, showed no interaction with any of the two axes. According to the CCA, the abiotic oxygen factors dissolved, electrical conductivity and temperature, favored the increase of the capture of species curimatã, tilapia and piau these more factors transparency favored catch hake while the pH and total dissolved solids favored the increase in the catch of the peacock bass. Thus the results demonstrate that the environmental variables influence the capture of the species composition in the reservoir during the study Santa Cruz. During the second study The survey data was conducted on a quarterly basis over the years 2011 to 2014. Sampling was carried out in eight points distributed in the reservoir. Environmental variables observed in the study showed no difference in the spatial distribution. However, when observed in the temporal sense of statistical analysis indicated difference between the years in the reservoir. The rainfall proved to be a determining factor in the temporal dynamics of abiotic variables in the reservoir of Santa Cruz, mainly temperature; pH; Dissolved oxygen; oxygen saturation; electrical conductivity and total dissolved solids. The reservoir of Santa Cruz, showed a trend of increase in total dissolved solids concentrations, high electrical conductivity and pH, characteristics that indicate eutrophication trend in this environment |
publishDate |
2016 |
dc.date.none.fl_str_mv |
2016-06-30 2017-04-13T15:04:37Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/doctoralThesis |
format |
doctoralThesis |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
LOPES, Yuri Vinicius de Andrade. Caracterização limnologicas e da pesca artesanal em um reservatório no semiárido tropical. 2016. 58 f. Tese (Doutorado) - Curso de Pós-graduação em Ciência Animal, Universidade Federal Rural do Semi-Árido, Mossoró, 2016. https://repositorio.ufersa.edu.br/handle/tede/647 |
identifier_str_mv |
LOPES, Yuri Vinicius de Andrade. Caracterização limnologicas e da pesca artesanal em um reservatório no semiárido tropical. 2016. 58 f. Tese (Doutorado) - Curso de Pós-graduação em Ciência Animal, Universidade Federal Rural do Semi-Árido, Mossoró, 2016. |
url |
https://repositorio.ufersa.edu.br/handle/tede/647 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.rights.driver.fl_str_mv |
CC-BY-SA info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
CC-BY-SA |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf application/pdf |
dc.publisher.none.fl_str_mv |
Universidade Federal Rural do Semi-Árido Brasil UFERSA Programa de Pós-Graduação em Ciência Animal |
publisher.none.fl_str_mv |
Universidade Federal Rural do Semi-Árido Brasil UFERSA Programa de Pós-Graduação em Ciência Animal |
dc.source.none.fl_str_mv |
reponame:Repositório Digital da Universidade Federal Rural do Semi-Árido (RDU) instname:Universidade Federal Rural do Semi-Árido (UFERSA) instacron:UFERSA |
instname_str |
Universidade Federal Rural do Semi-Árido (UFERSA) |
instacron_str |
UFERSA |
institution |
UFERSA |
reponame_str |
Repositório Digital da Universidade Federal Rural do Semi-Árido (RDU) |
collection |
Repositório Digital da Universidade Federal Rural do Semi-Árido (RDU) |
repository.name.fl_str_mv |
Repositório Digital da Universidade Federal Rural do Semi-Árido (RDU) - Universidade Federal Rural do Semi-Árido (UFERSA) |
repository.mail.fl_str_mv |
repositorio@ufersa.edu.br || admrepositorio@ufersa.edu.br |
_version_ |
1809747454370775040 |