River–groundwater interactions in the Brazilian Pantanal. The case of the Cuiabá River

Girard, Pierre; Silva, Carolina Joana da; Abdo, Mara Silvia Aguiar

doi:10.1016/s0022-1694(03)00235-x

Cited by 31 publications

(22 citation statements)

References 4 publications

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“…Monthly mean temperatures near the city of Cuiabá ranging from 21.48C in July to 27.48C in December. However, short-term incursions of polar air masses during winter may lower the temperature to nearly 08C (Girard et al, 2003).…”

Section: Study Areamentioning

confidence: 99%

Influence of the flood regime on the reproduction of fish species with different reproductive strategies in the Cuiabá River, Upper Pantanal, Brazil

Bailly

Agostinho

Suzuki

2008

River Research & Apps

136

134

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This study evaluated the influence of the flood regime of the Cuiabá River on the reproductive dynamics of fish species with different reproductive strategies. Sampling was carried out at ten sites in the basin, between March 2000 and April 2004. The reproductive strategies evaluated were long-distance migrant (LM), short-distance migrant (SM), sedentary with parental care (PC) and sedentary or SM with internal fertilization (IF). Period, duration and intensity of floods were the flooding attributes considered. Duration and time of spawning were evaluated using the index of reproductive activity (IRA), and inferences concerning reproductive allocation were based on the analysis of gonad weight. Reproductive success was evaluated based on the annual catch of young-of-the-year of each species. Reproductive dynamics and flood regime were closely correlated; the reproductive peaks of fishes using all four strategies always preceded flood peaks. Intense floods favoured gonadal development of LM and PC, but were less important for IF. In relation to juvenile survival, the occurrence of floods appeared to be crucial for the strategies of LM, PC and IF, because such floods increased fish survival in the period of initial development. In contrast, SM appeared to be less dependent on floods for reproduction. These results indicate that, except for SM, floods have an important role in the recruitment of species using other reproductive strategies, and influence spawning success as well as juvenile survival.

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Section: Study Areamentioning

confidence: 99%

Influence of the flood regime on the reproduction of fish species with different reproductive strategies in the Cuiabá River, Upper Pantanal, Brazil

Bailly

Agostinho

Suzuki

2008

River Research & Apps

136

134

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“…The formation of rings in the Neotropics is usually associated with spawning (GirArd et al, 2003;FeitoSA et al, 2004FeitoSA et al, ). dei toS, et al (2010 found the same explanation for ring formation in 40.7% of the studies they analyzed.…”

Section: Resultsmentioning

confidence: 99%

Aging and growth parameter from the Piaractus mesopotamicus (pacu) from the Cuiabá river, Mato Grosso, Brazil

Ambrósio

Balbi

Francisco

et al. 2014

Iheringia, Sér. Zool.

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ABSTRACT. This study has aims to determine the age and to estimate the growth parameters using scales of the species. Individuals of Piaractus mesopotamicus (Holmberg, 1887) used in this study were captured in the commercial fishery conducted in the region, along the year 2006. The model selected to express the growth of the species was the von Bertalanffy Sl= Sl∞* [1-exp -k(t-to) ]. To determine if scales are suitable for studying the growth of pacu, we analyzed the relation between standard length (Sl) and the radius of the scales through linear regression. The period of annuli formation was determined analyzing the variations in the marginal increment and evaluating the consistency of the readings through the analysis of the coefficient of variations (CVs) for the average standard lengths of each age (number of rings) observed in the scales. The relationship between Ls of the fish and the radius of the scales showed that scales can be used to study the age and growth of P. mesopotamicus (R= 0.79). CVs were always below 20%, demonstrating the consistency of the readings. Annuli formation occurred in February, probably related to trophic migration that occurs in this month in the region. Equations that represents the growth in length obtained for P. mesopotamicus are Sl=50.00* [1-exp -0.18(t-(-3.00) ] for males and Sl=59.23*[1-exp -0.14(t- (-3.36) ] for females. The growth parameters obtained in this study were lower compared to other studies previously conducted for the same species and can related to overexploitation that species is submitted by fishing in the region. These values show also that females of pacu attain greater asymptotic length than males that growth faster. KEYWORDS.Growth rings, scales, von Bertalanffy model, Ford-Walford. -k(t-to) ]. Para saber se as escamas são apropriadas para estudos de crescimento do pacu, nós analisamos a relação entre o comprimento padrão (Cp) e o raio das através de regressão linear. O período de formação dos anéis foi determinado analisando as variações no incremento marginal e a consistência das leituras foi avaliada através da análise do coeficiente de variação (CVs) do comprimento padrão médio para cada idade (número de anéis) observado nas escamas. A correlação entre o Ls do peixe e o raio das escamas mostrou que as escamas podem ser utilizadas para estudos de crescimento do P. mesopotamicus (R= 0.79). Os CVs foram sempre abaixo de 20% demonstrando consistência nas leituras. A formação dos anéis ocorreu em fevereiro provavelmente relacionada com a migração trófica que ocorre neste mês na região. As equações que representa o crescimento em comprimento obtidas para o P. mesopotamicus são: Cp=50.00* [1-exp -0.18(t-(-3.00) ] para machos e Cp=59.23*[1-exp -0.14(t- (-3.36) ] para fêmeas. Os parâmetros de crescimento encontrados neste estudo foram mais baixos quando comparados com outros estudos para a mesma espécie realizados anteriormente e pode estar relacionado com "overexplotation" pela pesca que a espécie é submetida na área. Esses valores...

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“…Os meses de maio a setembro são secos e os meses de outubro a abril, chuvosos (GIRARD, 2003). A formação geológica da bacia e o clima regional predominante conduzem a padrões sazonais com elevada precipitação e que contribuem para inundações no Alto Pantanal (SEVERI, 1999).…”

Section: áRea De Estudounclassified

“…Inundações são eventos de extrema importância para a manutenção de ecossistemas ripários (GREGORY et al, 1991;POFF et al, 1997;NILSSON;SVEDMARK, 2002). O hidroperíodo (magnitude, duração e frequência de inundação) é considerado importante fator físico de controle da distribuição de espécies vegetais ripárias e de outras áreas úmidas (MITSCH;GOSSELINK, 1993;HUPP;OSTERKAMP, 1996).…”

Section: Introductionunclassified

Efeito da inundação lateral sobre a distribuição da vegetação ripária em um trecho do rio Cuiabá, MT

et al. 2011

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River–groundwater interactions in the Brazilian Pantanal. The case of the Cuiabá River

Cited by 31 publications

References 4 publications

Influence of the flood regime on the reproduction of fish species with different reproductive strategies in the Cuiabá River, Upper Pantanal, Brazil

Influence of the flood regime on the reproduction of fish species with different reproductive strategies in the Cuiabá River, Upper Pantanal, Brazil

Aging and growth parameter from the Piaractus mesopotamicus (pacu) from the Cuiabá river, Mato Grosso, Brazil

Efeito da inundação lateral sobre a distribuição da vegetação ripária em um trecho do rio Cuiabá, MT

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