Spatial and seasonal trends of a natural population of Biomphalaria occidentalis in northeastern Argentina
This study aims to analyze the age of a population of Biomphalaria occidentalis on a pound of Riachuelo river basin, wich is one of the three most important Middle Paraná river affluents in Corrientes province. Samples were drawn from three stations, were spatial and temporal numerical variations of...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Fundação Oswaldo Cruz (FIOCRUZ)
1992-06-01
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| Series: | Memorias do Instituto Oswaldo Cruz |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0074-02761992000200002 |
| _version_ | 1797704771027599360 |
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| author | Alejandra Rumi Monika Inés Hamann |
| author_facet | Alejandra Rumi Monika Inés Hamann |
| author_sort | Alejandra Rumi |
| collection | DOAJ |
| description | This study aims to analyze the age of a population of Biomphalaria occidentalis on a pound of Riachuelo river basin, wich is one of the three most important Middle Paraná river affluents in Corrientes province. Samples were drawn from three stations, were spatial and temporal numerical variations of the snail, as well as its relation with different environmental parameters, mainly temperature, rainfall, pH and conductivity, were analyzed. Snail abundance is given in number of individuals/hour. The differences between the three sampling stations, estimated by nonparametric tests, was nonsignificant. A relative scale to the greatest shell diameter was employed to build the age pyramids. Temporal fluctuations of snail abundance correlated negatively with the highest monthly accumulated temperatures (P < 0.05). Although different floristic compositions were observed at the three stations, no significant numerical variations were detected in B. occidentalis spatial distribution. Reproductive activity took place between March-April and November with overlapping cohort system. During summer (December-Febuary) mortality increased along with temperature and reproductive activity was not evident. |
| first_indexed | 2024-03-12T05:25:24Z |
| format | Article |
| id | doaj.art-0e96f4a81d8945a883b9cf67b6d78b90 |
| institution | Directory Open Access Journal |
| issn | 0074-0276 1678-8060 |
| language | English |
| last_indexed | 2024-03-12T05:25:24Z |
| publishDate | 1992-06-01 |
| publisher | Fundação Oswaldo Cruz (FIOCRUZ) |
| record_format | Article |
| series | Memorias do Instituto Oswaldo Cruz |
| spelling | doaj.art-0e96f4a81d8945a883b9cf67b6d78b902023-09-03T07:24:27ZengFundação Oswaldo Cruz (FIOCRUZ)Memorias do Instituto Oswaldo Cruz0074-02761678-80601992-06-0187218118610.1590/S0074-02761992000200002Spatial and seasonal trends of a natural population of Biomphalaria occidentalis in northeastern ArgentinaAlejandra RumiMonika Inés HamannThis study aims to analyze the age of a population of Biomphalaria occidentalis on a pound of Riachuelo river basin, wich is one of the three most important Middle Paraná river affluents in Corrientes province. Samples were drawn from three stations, were spatial and temporal numerical variations of the snail, as well as its relation with different environmental parameters, mainly temperature, rainfall, pH and conductivity, were analyzed. Snail abundance is given in number of individuals/hour. The differences between the three sampling stations, estimated by nonparametric tests, was nonsignificant. A relative scale to the greatest shell diameter was employed to build the age pyramids. Temporal fluctuations of snail abundance correlated negatively with the highest monthly accumulated temperatures (P < 0.05). Although different floristic compositions were observed at the three stations, no significant numerical variations were detected in B. occidentalis spatial distribution. Reproductive activity took place between March-April and November with overlapping cohort system. During summer (December-Febuary) mortality increased along with temperature and reproductive activity was not evident.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0074-02761992000200002PlanorbidaeBiomphalaria accidentalisecology |
| spellingShingle | Alejandra Rumi Monika Inés Hamann Spatial and seasonal trends of a natural population of Biomphalaria occidentalis in northeastern Argentina Memorias do Instituto Oswaldo Cruz Planorbidae Biomphalaria accidentalis ecology |
| title | Spatial and seasonal trends of a natural population of Biomphalaria occidentalis in northeastern Argentina |
| title_full | Spatial and seasonal trends of a natural population of Biomphalaria occidentalis in northeastern Argentina |
| title_fullStr | Spatial and seasonal trends of a natural population of Biomphalaria occidentalis in northeastern Argentina |
| title_full_unstemmed | Spatial and seasonal trends of a natural population of Biomphalaria occidentalis in northeastern Argentina |
| title_short | Spatial and seasonal trends of a natural population of Biomphalaria occidentalis in northeastern Argentina |
| title_sort | spatial and seasonal trends of a natural population of biomphalaria occidentalis in northeastern argentina |
| topic | Planorbidae Biomphalaria accidentalis ecology |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0074-02761992000200002 |
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