Ocorrência de autofecundação em Subulina octona (Bruguiére) (Pulmonata, Subulinidae) sob condições de laboratório

Bessa, Elisabeth Cristina de Almeida; Araújo, José Luíz de Barros

doi:10.1590/s0101-81751995000300025

Cited by 23 publications

(4 citation statements)

References 5 publications

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“…The hatching rates obtained in this study for control group was alike to those found by Bessa and Araújo (1995b). According to these authors, the hatches occur between the first and the 15 th day after the oviposition, with registered mean viability of the eggs (94.8%) for this snail.…”

Section: Discussionsupporting

confidence: 86%

Preliminary phytochemical screening and molluscicidal activity of the aqueous extract of Bidens pilosa Linné (Asteraceae) in Subulina octona (Mollusca, Subulinidade)

Souza

Silva

Chicarino

et al. 2013

An. Acad. Bras. Ciênc.

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The aim of this study was to establish reference concentrations (LC 50 e LC 90 ) of aqueous extracts of Bidens pilosa on the land snail Subulina octona, in order to assess the changes caused by 24 and 48 h exposure to the sublethal concentration regarding species' fecundity, hatchability and in offspring produced after exposure to confirm the presence of tannins, saponins and flavonoids in this plant species. Eggs newly hatched and 30 day-old snails were exposed to sublethal concentration, calculated for adults. The phytochemical analysis confirmed the presence of flavonoids, condensed tannins and saponins in the aqueous extract of B. pilosa. The LC 50 and LC 90 obtained were 51.4mg/mL and 74.1mg/mL respectively. The exposure to sublethal concentration reduced significantly the hatchability and the survival of the offspring hatched from exposed eggs and also caused a reduction on survival and growth in snails exposed for both time period. The exposure time also caused a reduction at the evaluated parameters.

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Section: Discussionsupporting

confidence: 86%

Preliminary phytochemical screening and molluscicidal activity of the aqueous extract of Bidens pilosa Linné (Asteraceae) in Subulina octona (Mollusca, Subulinidade)

Souza

Silva

Chicarino

et al. 2013

An. Acad. Bras. Ciênc.

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“…In terms of the sexual maturity, it was not possible to observe the difference between the group treated with caffeine at 2.5 g/L and the control group, since none of these groups laid eggs until the 120 th day. Bessa and Araújo (1995b) observed that in S. octona snails, the sexual maturity was attained at 38 to 50 days after birth. During the study of these authors, the temperature varied from 23 to 26°C.…”

Section: Resultsmentioning

confidence: 98%

The influence of caffeine and thymol on the survival, growth and reproduction of Subulina octona (Brugüière, 1789) (Mollusca, Subulinidae)

Ferreira

Soares

D’ávila

et al. 2009

Braz. arch. biol. technol.

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“…The bottom of each box was lined with humus, which was moistened every 2 days with 10 ml of tap water. The snails were fed ad libitum with a commercial poultry feed, supplemented with a premix of minerals, vitamins and calcium carbonate (Bessa and Araújo 1995a,b). When the laboratory colony included at least five generations from the original field collection, newly hatched snails were randomly taken and placed in new transparent plastic boxes under the same conditions as described above, with 30 individuals per box.…”

Section: Methodsmentioning

confidence: 99%

Ontogeny and morphological variability of shell in populations of Leptinaria unilamellata (d’Orbigny, 1835) (Mollusca, Pulmonata, Subulinidae)

Medeiros¹,

Caldeira²,

Mendonça³

et al. 2015

SpringerPlus

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BackgroundRecent studies concerning species of land snails have revealed that the shell morphometrics can provide evidence of the differentiation among populations. In many cases, the morphologic analysis combined with the investigation of molecular variability, can support changes in taxonomy of studied groups. In this sense, the study of shell morphometry during snail development can contribute to the understanding of the structural mechanisms that creates the diversity observed.DescriptionThe morphological and ontogenetic pattern differences were collected among snails from four different populations, kept under the same laboratorial conditions. It was possible to distinguish characteristic shell morphometrics for snails from each population. The snails from Barra Mansa and Floriano, locations with smaller precipitation indexes presented smaller shell aperture values. The results are discussed in terms of the role of the reproductive strategy of this species as a factor determining shell shape.ConclusionsDifferences in growth allometry indicated that the whole shell forming process is different among the populations, not only the final form of the adult’s shell. Some allometry relationships indicated that, during the snails’ development, the increase in shell width is not proportional to the increase of the width and height of the shell aperture. Thus, there is possibly an antagonism between the adoption of K-strategy and protection against desiccation. Since the spire indices of L. unilamellata morphotypes cannot be explained by physical functional aspects, the most likely explanation is the reproductive strategy of this species.

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Ocorrência de autofecundação em Subulina octona (Bruguiére) (Pulmonata, Subulinidae) sob condições de laboratório

Cited by 23 publications

References 5 publications

Preliminary phytochemical screening and molluscicidal activity of the aqueous extract of Bidens pilosa Linné (Asteraceae) in Subulina octona (Mollusca, Subulinidade)

Preliminary phytochemical screening and molluscicidal activity of the aqueous extract of Bidens pilosa Linné (Asteraceae) in Subulina octona (Mollusca, Subulinidade)

The influence of caffeine and thymol on the survival, growth and reproduction of Subulina octona (Brugüière, 1789) (Mollusca, Subulinidae)

Ontogeny and morphological variability of shell in populations of Leptinaria unilamellata (d’Orbigny, 1835) (Mollusca, Pulmonata, Subulinidae)

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