Resumo
Biological aspects of Bradybaena similaris (Férussac, 1821) were studied, such as: onset of sexual maturity, occurrence of self-fertilization, oviposition, incubation period, eclosion rate and shell length measurement at different stages of development. It was noted that in isolated B. similaris the minimum and maximum time for reaching sexual maturity were 109 and 180 days, respectively. When kept in groups, the minimum time was 78 days. The occurrence of self-fertilization was observed in 18.4% of specimens. The total number of eggs per oviposition varied from one to 38 (average: 3,5 ± 7,15), the total number of eggs per mollusc varied from one to 39 (average: 7,0 ± 10,21) and the total number of oviposition per mollusc varied form one to six (averege: 2,0 ± 1,27). Thirty ovipositions (894 eggs) were followed and the minimum eclosion time of the young was 14 days, the maximum eclosion time was 35 days and the average 23,69 days. The eclosion average percent was 81,22. As to the shell length in different growth stages, it was observed that in B. similaris the length of the shell was similar until 30 days for age. After this period isolated specimens acquired a greater growth rhythm when compared to that of grouped specimens. The maximum shell length of isolated specimens was 17,4 mm whereas grouped specimens reached 14,5 mm. In this specie, individuals that were kept grouped became sexually mature earlier than isolated ones. Individuals kept isolated reach larger length of shell. In the moment of the sexual maturity, the length of the shell in the individuals tha were kept isolated was smaller than the grouped.
Bradybaena similaris; biology; growth; reproduction
Bradybaena similaris; biology; growth; reproduction
Estudo do crescimento e da reprodução de Bradybaena similaris (Férussac) (Mollusca, Xanthonychidae) em laboratório
Growth and reproduction of Bradybaena similaris (Férussac) (Mollusca, Xanthonychidae) in laboratory conditions
Marcelo Nocelle de AlmeidaI,II; Elisabeth Cristina de Almeida BessaI,III
IDepartamento de Zoologia, Instituto de Ciências Biológicas, Universidade Federal de Juiz de Fora. 36036-330 Juiz de Fora, Minas Gerais, Brasil
IIBolsista CAPES. E-mail: mnocelle@bol.com.br
IIIE-mail: bbessa@cpd.ufjf.br
ABSTRACT
Biological aspects of Bradybaena similaris (Férussac, 1821) were studied, such as: onset of sexual maturity, occurrence of self-fertilization, oviposition, incubation period, eclosion rate and shell length measurement at different stages of development. It was noted that in isolated B. similaris the minimum and maximum time for reaching sexual maturity were 109 and 180 days, respectively. When kept in groups, the minimum time was 78 days. The occurrence of self-fertilization was observed in 18.4% of specimens. The total number of eggs per oviposition varied from one to 38 (average: 3,5 ± 7,15), the total number of eggs per mollusc varied from one to 39 (average: 7,0 ± 10,21) and the total number of oviposition per mollusc varied form one to six (averege: 2,0 ± 1,27). Thirty ovipositions (894 eggs) were followed and the minimum eclosion time of the young was 14 days, the maximum eclosion time was 35 days and the average 23,69 days. The eclosion average percent was 81,22. As to the shell length in different growth stages, it was observed that in B. similaris the length of the shell was similar until 30 days for age. After this period isolated specimens acquired a greater growth rhythm when compared to that of grouped specimens. The maximum shell length of isolated specimens was 17,4 mm whereas grouped specimens reached 14,5 mm. In this specie, individuals that were kept grouped became sexually mature earlier than isolated ones. Individuals kept isolated reach larger length of shell. In the moment of the sexual maturity, the length of the shell in the individuals tha were kept isolated was smaller than the grouped.
Key words: Bradybaena similaris, biology, growth, reproduction
Texto completo disponível apenas em PDF.
Full text available only in PDF format.
DUARTE, M.J.F. 1980. O ciclo evolutivo de Postharmostomum gallinum Witenberg, 1923, no estado do Rio de Janeiro. Brasil (Trematoda, Brachylaemidae). Rev. Brasil. Biol. 40(4):793-809.
Recebido em 15.XII.2000; aceito em 22.X.2001
Referências bibliográficas
- ALBUQUERQUE DE MATOS, R.M. 1989. Ciclo vital e reprodução em Helix aspersa com aplicações a helicicultura IV Simp. Intern. Reprod. Animal, Lisboa, 1:115-142.
- ARAÚJO, J.L.B. 1989. Moluscos de importância econômica no Brasil. I. Xanthonychidae: Bradybaena similaris (Férussac, 1821). (Mollusca, Gastropoda, Pulmonata, Stylommatophora). Revta bras. Zool.6(4):583-592.
- BAUR, B.; R. LOCHER & A. BAUR. 1998. Sperm allocation in the simultaneously hermaphroditic land snail Arianta arbustorum. Animal Behav. 56(4):839-845.
- BESSA, E.C.A. & J.L.B. ARAÚJO. 1995a. Oviposição, tamanho de ovos e medida do comprimento da concha em diferentes fases do desenvolvimento de Subulina octona (Bruguiére) (Pulmonata, Subulinidae) em condições de laboratório. Revta bras. Zool. 12(3):647-654.
- ______. 1995b. Ocorrência de autofecundação em Subulina octona (Bruguiére) (Pulmonata, Subulinidae) sob condições de laboratório. Revta bras. Zool. 12(3):719-723.
- CHARRIER, M. & J. DAGUZAN. 1978. Étude de la croissance de l'escargot petit gris Helix aspersa Muller. (Mollusque Gasteropode Pulmone). Haliotis 9(1):15-18.
- DUNCAN, C.J. 1975. Reproduction, p. 309-365. In: V. FRETTER & J. PEAKE (Eds). Pulmonates. London, Academic Press, Vol. I, XXIX+417p.
- FREITAS, J.S.; D.P. PAULA & M.O. CARIELLO. 1997. The influence of self-fertilization performance and copulation behaviour in reproduction by cross fertilization in groups of Biomphalaria tenagophila (Mollusca, Planorbidae). Mem. Inst. Oswaldo Cruz 92(6):739-743.
- GOMES, P.A.C.; S. NUERNBERG; M.P. NETO; G.P. OLIVEIRA; H.E.B. REZENDE; J.L.B. ARAÚJO & R.P. MELLO. 1975. Biologia da Lymnaea columella Say, 1817. Arq. Mus. Nac., Rio de Janeiro, 55:67-70.
- JURBERG, P.; H.M. BARROS; L.A.L. GOMES & A.CS. COELHO. 1988. Superfamília Bulimuloidea do Brasil. Bulimulidae: Thaumastus (Thaumaslus) launaisii (Férussac. 1821 ). com dados biológicos e aspectos comportamentais (Mollusca, Gastropoda, Pulmonata). Bol. Mus. Nac., n.s. Zool., Rio de Janeiro, 317:1-40.
- LAZARIDOU-DIMITRIADOU, M. & J. DAGUZAN. 1981. Etude de l'effet du groupement des individus chez Theba pisana (Mollusque Gasteropode Pulmone Stylommatophore). Malacologia 20(2):195-204.
- LAZARIDOU-DIMITRIADOU, M. & M.E. KATTOULAS. 1981. Contribution a l'étude de la biologie et de la croissance des escargots commercialises en Greece: Eobania vermiculuta (Müller) et Helix aspersa Müller. Haliotis 11:129-137.
- LEAHY, W.M. 1977. Sobre a biologia de Bradybaena fruticum Beck (Molusco terrestre) estudos preliminares. Ci. Cult., São Paulo, 29(7):816.
- ______. 1980. Aspectos adaptativos de Bradybaena similaris Férussac, 1821 ( Mollusca, Gastropoda, Pulmonata) submetido ao jejum e dessecação. Bol. Fisiol. Animal Univ. São Paulo 5:131-138.
- ______. 1984. Comportamento e características anatomofuncionais da reprodução em Bradybaena similaris (Molusco Pulmonado). Ci. Cult., São Paulo, 36(8):1389-1392.
- LOUREIRO, M.C. 1960. Manutenção de Bradybaena similaris (Férussac, 1821) em terários. Revta Ceres,Viçosa. 11(62):60-63.
- OLIVEIRA, MP.; E.L. ALMEIDA; I. VIEIRA & M.H.R. OLIVEIRA. 1968. Comunicação no. 1. Criação de Moluscos em Terrários e Aquários (Uma experiência em laboratório). Juiz de Fora, Esdeva, 15p.
- OLIVEIRA, M.P.; I. VIEIRA & M.H.R. OLIVEIRA. 1971. Sobre Bradybaena similaris Férussac (Gastropoda, Pulmonata, Stylommatophora, Fruticicolidae). Copula y funcionamiento del oviducto durante el período de fecundacion y formacion del huevo. Com. Soc. Malac. Urug. 3(21):155-161.
- PARAENSE, W.L. & L.R. CORRÊA. 1988. Self-fertilization in the snails Helysoma duryi and Helysoma trivolvis. Mem. Inst. Oswaldo Cruz. 83(4):405-409.
- PAWSON. P.A. & R. CHASE. 1984. The lyfe-cycle and reproductive activity of Achatina fulica (Bowdich) in laboratory culture. Jour. Moll. Stud. 50: 85-91.
- PINHEIRO, J. & S.B. AMATO. 1995. Eurytrema coelomaticum: influence of the infection on the reproduction and nucleic acids contents in the albumen gland and ovotestis of Bradybaena similaris. Mem. Inst. Oswaldo Cruz. 90(5):635-638.
- PITONI, V.L.L.; I.L. VEITENHEIMER & M.C.D. MANSUR. 1976. Moluscos do Rio Grande do Sul: coleta, preparação e conservação. Iheringia, Sér. Divulgação. Porto Alegre, 5:25-28.
- RAMBO. P.R.; A.A. AGOSTINI & C. GRAEFF-TEIXEIRA. 1997. Abdominal angiostrongylosis in southernence and parasitic burden in molluscs intermediate hosts from eighteen endemic foci. Mem. Inst. Oswaldo Cruz. 92(1):9-14.
- SANTOS, E. 1982. Moluscos do Brasil. Belo Horizonte, Ed. Itatiaia Ltda. 141p.
- SANTOS, O. 1994. Presencia de Bradybaena similaris (Férussac, 1821) en el Uruguay. Com. Soc. Malac. Urug. 7(66-67):376-378.
- THOMÉ, J.W.; A.V. SILVA & D.D . SANTOS. 1996. Manual de aulas práticas de zoologia: estudo morfo-anatômico de um molusco Sigmuretra. Porto Alegre. Cadernos EDIPUCRS, Ser. Zool.,Porto Alegre, 12:1-25.
- VINCENT. G; A. DERAY; J. ENEE; M. CLERC; M.H. JUGAND; F. JUGAND & D. BOLZONI. 1982. Nombre d'oeufs par ponte, durée d'incubation et croissance en laboratoire de Helix pomatia L. (Gastropoda: Pulmonata). Haliotis 12:13-20.
Datas de Publicação
-
Publicação nesta coleção
03 Jun 2009 -
Data do Fascículo
Dez 2001
Histórico
-
Aceito
22 Out 2001 -
Recebido
15 Dez 2000