2016
DOI: 10.1590/1678-4766e2016011
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Quantifying zooplankton species: use of richness estimators

Abstract: ABSTRACT. Richness estimators (Jackknife 1, Bootstrap, Chao 1 and ACE) were used to relate zooplankton species richness with amount of water collected per sample and number of samples throughout the year for the limnetic region of Sapucai River compartment of Furnas reservoir, state of Minas Gerais, Brazil. Seven 100 L samples were collected in sequence using a motor pump, and seven 70 L samples were collected in sequence using a plankton net (68 μm mesh size) in vertical hauls, to totalize 450 L, in three sta… Show more

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Cited by 4 publications
(3 citation statements)
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“…Collection of relatively rare freshwater fauna depends on factors such as the number of samples collected, the size of the waterbodies studied (Azovsky, 2011; Vieira et al., 2017), and the complexity and effectiveness of the sampling methods and approaches used (Castilho et al., 2016; Gutkowska et al, 2013). We tried to increase and balance sampling effort in each studied region by adding species lists from respective regional literature (including other waterbodies and periods).…”
Section: Discussionmentioning
confidence: 99%
“…Collection of relatively rare freshwater fauna depends on factors such as the number of samples collected, the size of the waterbodies studied (Azovsky, 2011; Vieira et al., 2017), and the complexity and effectiveness of the sampling methods and approaches used (Castilho et al., 2016; Gutkowska et al, 2013). We tried to increase and balance sampling effort in each studied region by adding species lists from respective regional literature (including other waterbodies and periods).…”
Section: Discussionmentioning
confidence: 99%
“…This was calculated with the following formula: C = p.100/P, where C is the constancy index, p is the number of samples where the species occurred, and P is the total number of samples. Also, species were classified as constant (present in > 80% of samples), frequent (50-80%), common (20-50%) and rare (< 20%) (Castilho et al, 2016).…”
Section: Discussionmentioning
confidence: 99%
“…A riqueza foi representada pelo número de espécies e a densidade numérica expressa em organismos por metro cúbico (org./m³). A classificação da frequência de ocorrência foi baseada em Dajoz (1983) e Castilho et al (2016): espécies constantes ocorrem em mais de 50% das amostras, de 25% a 50% são consideradas espécies acessórias e percentuais menores que 25% espécies acidentais.…”
Section: Methodsunclassified