Estudo do crescimento e da reprodução de Leptinaria unilamellata (D'orbigny) (Mollusca, Subulinidae) em laboratório

Almeida, Marcelo Nocelle de; Bessa, Elisabeth Cristina de Almeida

doi:10.1590/s0101-81752001000400009

Cited by 11 publications

(9 citation statements)

References 9 publications

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“…In Brazil, populations of L. unilamellata occur in Amazonas, Pará, Rondônia, Pernambuco, Bahia, Mato Grosso, Minas Gerais, Rio de Janeiro and São Paulo (Araújo 1982). This species can be easily raised in the laboratory and has been used as a model organism in studies concerning biology and morphology (Araújo 1982; Dutra 1988; Almeida and Bessa 2001; Brandolini and Gomes 2002; Carvalho et al 2009). …”

Section: Introductionmentioning

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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Section: Introductionmentioning

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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“…Tal fato se deve aos moluscos investirem sua energia no crescimento antes de alcançarem a maturidade sexual e, ao alcançarem, investirem a maior parte de sua energia na reprodução, diminuindo assim o crescimento (Heller, (Almeida & Bessa, 2001a;Carvalho et al, 2009), e em espécies de outras famílias de pulmonados terrestres como Bradybaena similaris (Férussac, 1821) (Xanthonychidae) (Almeida & Bessa, 2001b;Carvalho et al, 2008), Bulimulus tenuissimus (d'Orbigny, 1835) (Bulimulidae) (Silva et al, 2008) e Habroconus semenlini (Moricand, 1845) (Euconulidae) . No entanto, o crescimento após a maturidade não prejudica o sucesso reprodutivo, uma vez que a produção de ovos (ou filhotes) aumenta devido ao maior tamanho do corpo (Cichon, 1999;Heller, 2001).…”

Section: Discussionunclassified

“…A autofecundação registrada nesse estudo é comum em moluscos dessa família, como verificado nos subulinídeos L. unilamellata (Almeida & Bessa, 2001a) e S. octona (Bessa & Araújo, 1995b) e em muitas outras famílias de gastrópodes terrestres (Armbruster et al, 2007). Essa estratégia foi verificada em muitos basomatóforos, como planorbídeos que se reproduzem apenas por esse modo, não havendo cópula, e não é incomum em estilomatóforos, apesar da maioria desses moluscos se reproduzir preferencialmente por fecundação cruzada (Gomot de Vaufleury, 2001).…”

Section: Discussionunclassified

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Ciclo de vida de Dysopeas muibum (Mollusca, Subulinidae) em laboratório: efeito do isolamento sobre padrões biológicos e conquiliomorfométricos

Pilate

Silva

Bessa

2013

Iheringia, Sér. Zool.

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RESUMO.O conhecimento dos aspectos biológicos e morfológicos dos moluscos terrestres é importante para o desenvolvimento de medidas de controle de pragas e de estratégias de conservação de espécies. O presente trabalho teve como objetivo caracterizar os padrões de biologia e conquiliomorfometria de Dysopeas muibum Marcus & Marcus, 1968 e verificar o efeito do isolamento sobre seu ciclo de vida e a morfometria da concha, em condições de laboratório. Foi realizado o acompanhamento do crescimento da concha, da liberação de filhotes e da mortalidade de 80 moluscos, dos quais 40 foram mantidos isolados e 40 agrupados (10 moluscos por grupo) em condições naturais de temperatura, umidade relativa e fotoperíodo, desde o nascimento até 180 dias de vida, quando então foram aferidas as medidas da concha. Os moluscos foram criados em terrários plásticos vedados com tecido de algodão e elástico, tendo como substrato terra vegetal esterilizada e alimentados com ração para frangos enriquecida com carbonato de cálcio. Foi verificado que os indivíduos possuem a concha pequena, alongada e são capazes de se reproduzir por autofecundação. Possuem crescimento indeterminado, iteroparidade, baixa mortalidade antes e após a maturidade sexual e a fecundidade aumenta de acordo com o tamanho corporal. O isolamento atuou na fecundidade, embora não tenha influenciado o crescimento, o alcance da maturidade sexual, a relação crescimento-reprodução, a mortalidade e a conquiliomorfometria. PALAVRAS-CHAVE.Reprodução, Gastropoda, morfometria, concha.ABSTRACT. Life cycle of Dysopeas muibum (Mollusca, Subulinidae) in laboratory: effect of isolation on biological and conquiliomorphometric patterns. The knowledge of biological and morphological characteristics of terrestrial molluscs is important for the development of pest control measures and strategies for the conservation of species. This study aimed to characterize the patterns of biology and conquiliomorphometrics of Dysopeas muibum Marcus & Marcus, 1968 and check the effect of isolation on its life cycle and morphometric of the shell, under laboratory conditions. We conducted monitoring growth of the shell, release of puppies and mortality of 80 molluscs, of which 40 were kept isolated and 40 grouped (10 molluscs per group) in natural conditions of temperature, relative humidity and photoperiod, from birth to 180 days of life, when the measures of the shell were taken. The molluscs were reared in plastic terrariums sealed with cotton fabric and elastic, containing plant soil sterile, and fed with food to broilers enriched with calcium carbonate. It was found that the species has small and elongated shell, and is able to reproduce by self-fertilization. It has indeterminate growth, iteroparity, low mortality before and after sexual maturity and fecundity increases with body size. The isolation acted on fertility, although it has not influenced the growth, reach sexual maturity, growthreproduction relation, mortality and conquiliomorfometrics.

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“…Although the form and structure of aquatic and terrestrial gastropod shells are very similar, there are fundamental differences in the physiological and physical aspects of shell growth between them (Wagge, 1951; Kado, 1960; Fournié & Chétail, 1984). In recent decades, more studies on terrestrial gastropods have been conducted (e.g., Berry, 1962; Umiński, 1975; Oosterhoff, 1977; Baur, 1984; Ahmed & Raut, 1991; Johnson & Black, 1991; Kobayashi & Hadfield, 1996; Kramarenko & Popov, 1999; de Almeida & de Almeida Bessa, 2001a; de Almeida & de Almeida Bessa, 2001b; D’Avila & de Almeida Bessa, 2005; Bloch & Willig, 2009; Silva et al, 2009; Sulikowska-Drozd, 2011; Kuźnik-Kowalska et al, 2013; Silva et al, 2013). It is worth mentioning that most of these growth experiments used traditional morphometric methods and were conducted in the laboratory (but see Oosterhoff, 1977; Johnson & Black, 1991).…”

Section: Introductionmentioning

confidence: 99%

On growth and form of irregular coiled-shell of a terrestrial snail:Plectostoma concinnum(Fulton, 1901) (Mollusca: Caenogastropoda: Diplommatinidae)

Liew

Kok

Urdy

2014

PeerJ

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The molluscan shell can be viewed as a petrified representation of the organism’s ontogeny and thus can be used as a record of changes in form during growth. However, little empirical data is available on the actual growth and form of shells, as these are hard to quantify and examine simultaneously. To address these issues, we studied the growth and form of a land snail that has an irregularly coiled and heavily ornamented shell–Plectostoma concinnum. The growth data were collected in a natural growth experiment and the actual form changes of the aperture during shell ontogeny were quantified. We used an ontogeny axis that allows data of growth and form to be analysed simultaneously. Then, we examined the association between the growth and the form during three different whorl growing phases, namely, the regular coiled spire phase, the transitional constriction phase, and the distortedly-coiled tuba phase. In addition, we also explored the association between growth rate and the switching between whorl growing mode and rib growing mode. As a result, we show how the changes in the aperture ontogeny profiles in terms of aperture shape, size and growth trajectory, and the changes in growth rates, are associated with the different shell forms at different parts of the shell ontogeny. These associations suggest plausible constraints that underlie the three different shell ontogeny phases and the two different growth modes. We found that the mechanism behind the irregularly coiled-shell is the rotational changes of the animal’s body and mantle edge with respect to the previously secreted shell. Overall, we propose that future study should focus on the role of the mantle and the columellar muscular system in the determination of shell form.

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Estudo do crescimento e da reprodução de Leptinaria unilamellata (D'orbigny) (Mollusca, Subulinidae) em laboratório

Cited by 11 publications

References 9 publications

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

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

Ciclo de vida de Dysopeas muibum (Mollusca, Subulinidae) em laboratório: efeito do isolamento sobre padrões biológicos e conquiliomorfométricos

On growth and form of irregular coiled-shell of a terrestrial snail:Plectostoma concinnum(Fulton, 1901) (Mollusca: Caenogastropoda: Diplommatinidae)

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