Growth rate fitting using the von Bertalanffy model: Analysis of natural populations of Drepanotrema spp. snails (Gastropoda: Planorbidae)
- Autores
- Rumi Macchi Zubiaurre, Alejandra; Gutiérrez Gregoric, Diego Eduardo; Roche, María Andrea de las Mercedes
- Año de publicación
- 2007
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- The genus Drepanotrema includes six species in Argentina. The life cycle in natural systems of Drepanotrema depressissimum, and D. lucidum has been little studied, except for some casual observations. The aim of this study is to analyze main population trends (age structures, recruitment periods, life span and curves of individual growth) in Paiva pond, Argentina. We explored growth model fitting and comparison methodologies between species and environments in Paiva pond and Isla Martín García (IMG), to determine interspecific patterns. Theoretical curves of von Bertalanffy's model for each population were contrasted with samplings using the χ2 test. Expected sizes were transformed into a percentage of maximum size and cohorts started from zero time, which allowed them to be independent of the real or estimated starting date and a comparison was possible. A similar time scale was used, because the k values proved to be sensitive to time scale. Maximum size reached by D. lucidum was 6.9 mm and by D. depressissimum 9.38 mm. Growth rates (k) fluctuated from 1.302 to 1.368 in the first and 1.339 to 1.509 in the second species. No statistically significant differences were found in growth curves among species inhabiting the Paiva pond and in the different IMG water bodies independent of the beginning of each cohort and maximum size. In general, no winter cohorts were observed, except in one population of D. kermatoides (IMG). Comparing circannual and biannual growth rhythms most of the species reached 60 % of their development during their first year, and 85 % or more during their second year.
Museo de La Plata - Materia
-
Ciencias Naturales
Zoología
Argentina
Drepanotrema spp.
Great Plata Basin
Growth-rates
Planorbidae - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- http://creativecommons.org/licenses/by/4.0/
- Repositorio
- Institución
- Universidad Nacional de La Plata
- OAI Identificador
- oai:sedici.unlp.edu.ar:10915/83041
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Growth rate fitting using the von Bertalanffy model: Analysis of natural populations of Drepanotrema spp. snails (Gastropoda: Planorbidae)Rumi Macchi Zubiaurre, AlejandraGutiérrez Gregoric, Diego EduardoRoche, María Andrea de las MercedesCiencias NaturalesZoologíaArgentinaDrepanotrema spp.Great Plata BasinGrowth-ratesPlanorbidaeThe genus Drepanotrema includes six species in Argentina. The life cycle in natural systems of Drepanotrema depressissimum, and D. lucidum has been little studied, except for some casual observations. The aim of this study is to analyze main population trends (age structures, recruitment periods, life span and curves of individual growth) in Paiva pond, Argentina. We explored growth model fitting and comparison methodologies between species and environments in Paiva pond and Isla Martín García (IMG), to determine interspecific patterns. Theoretical curves of von Bertalanffy's model for each population were contrasted with samplings using the χ2 test. Expected sizes were transformed into a percentage of maximum size and cohorts started from zero time, which allowed them to be independent of the real or estimated starting date and a comparison was possible. A similar time scale was used, because the k values proved to be sensitive to time scale. Maximum size reached by D. lucidum was 6.9 mm and by D. depressissimum 9.38 mm. Growth rates (k) fluctuated from 1.302 to 1.368 in the first and 1.339 to 1.509 in the second species. No statistically significant differences were found in growth curves among species inhabiting the Paiva pond and in the different IMG water bodies independent of the beginning of each cohort and maximum size. In general, no winter cohorts were observed, except in one population of D. kermatoides (IMG). Comparing circannual and biannual growth rhythms most of the species reached 60 % of their development during their first year, and 85 % or more during their second year.Museo de La Plata2007-07-30info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf559-567http://sedici.unlp.edu.ar/handle/10915/83041enginfo:eu-repo/semantics/altIdentifier/issn/0034-7744info:eu-repo/semantics/altIdentifier/doi/10.15517/rbt.v55i2.6031info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by/4.0/Creative Commons Attribution 4.0 International (CC BY 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-10-15T11:07:38Zoai:sedici.unlp.edu.ar:10915/83041Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-10-15 11:07:38.522SEDICI (UNLP) - Universidad Nacional de La Platafalse |
dc.title.none.fl_str_mv |
Growth rate fitting using the von Bertalanffy model: Analysis of natural populations of Drepanotrema spp. snails (Gastropoda: Planorbidae) |
title |
Growth rate fitting using the von Bertalanffy model: Analysis of natural populations of Drepanotrema spp. snails (Gastropoda: Planorbidae) |
spellingShingle |
Growth rate fitting using the von Bertalanffy model: Analysis of natural populations of Drepanotrema spp. snails (Gastropoda: Planorbidae) Rumi Macchi Zubiaurre, Alejandra Ciencias Naturales Zoología Argentina Drepanotrema spp. Great Plata Basin Growth-rates Planorbidae |
title_short |
Growth rate fitting using the von Bertalanffy model: Analysis of natural populations of Drepanotrema spp. snails (Gastropoda: Planorbidae) |
title_full |
Growth rate fitting using the von Bertalanffy model: Analysis of natural populations of Drepanotrema spp. snails (Gastropoda: Planorbidae) |
title_fullStr |
Growth rate fitting using the von Bertalanffy model: Analysis of natural populations of Drepanotrema spp. snails (Gastropoda: Planorbidae) |
title_full_unstemmed |
Growth rate fitting using the von Bertalanffy model: Analysis of natural populations of Drepanotrema spp. snails (Gastropoda: Planorbidae) |
title_sort |
Growth rate fitting using the von Bertalanffy model: Analysis of natural populations of Drepanotrema spp. snails (Gastropoda: Planorbidae) |
dc.creator.none.fl_str_mv |
Rumi Macchi Zubiaurre, Alejandra Gutiérrez Gregoric, Diego Eduardo Roche, María Andrea de las Mercedes |
author |
Rumi Macchi Zubiaurre, Alejandra |
author_facet |
Rumi Macchi Zubiaurre, Alejandra Gutiérrez Gregoric, Diego Eduardo Roche, María Andrea de las Mercedes |
author_role |
author |
author2 |
Gutiérrez Gregoric, Diego Eduardo Roche, María Andrea de las Mercedes |
author2_role |
author author |
dc.subject.none.fl_str_mv |
Ciencias Naturales Zoología Argentina Drepanotrema spp. Great Plata Basin Growth-rates Planorbidae |
topic |
Ciencias Naturales Zoología Argentina Drepanotrema spp. Great Plata Basin Growth-rates Planorbidae |
dc.description.none.fl_txt_mv |
The genus Drepanotrema includes six species in Argentina. The life cycle in natural systems of Drepanotrema depressissimum, and D. lucidum has been little studied, except for some casual observations. The aim of this study is to analyze main population trends (age structures, recruitment periods, life span and curves of individual growth) in Paiva pond, Argentina. We explored growth model fitting and comparison methodologies between species and environments in Paiva pond and Isla Martín García (IMG), to determine interspecific patterns. Theoretical curves of von Bertalanffy's model for each population were contrasted with samplings using the χ2 test. Expected sizes were transformed into a percentage of maximum size and cohorts started from zero time, which allowed them to be independent of the real or estimated starting date and a comparison was possible. A similar time scale was used, because the k values proved to be sensitive to time scale. Maximum size reached by D. lucidum was 6.9 mm and by D. depressissimum 9.38 mm. Growth rates (k) fluctuated from 1.302 to 1.368 in the first and 1.339 to 1.509 in the second species. No statistically significant differences were found in growth curves among species inhabiting the Paiva pond and in the different IMG water bodies independent of the beginning of each cohort and maximum size. In general, no winter cohorts were observed, except in one population of D. kermatoides (IMG). Comparing circannual and biannual growth rhythms most of the species reached 60 % of their development during their first year, and 85 % or more during their second year. Museo de La Plata |
description |
The genus Drepanotrema includes six species in Argentina. The life cycle in natural systems of Drepanotrema depressissimum, and D. lucidum has been little studied, except for some casual observations. The aim of this study is to analyze main population trends (age structures, recruitment periods, life span and curves of individual growth) in Paiva pond, Argentina. We explored growth model fitting and comparison methodologies between species and environments in Paiva pond and Isla Martín García (IMG), to determine interspecific patterns. Theoretical curves of von Bertalanffy's model for each population were contrasted with samplings using the χ2 test. Expected sizes were transformed into a percentage of maximum size and cohorts started from zero time, which allowed them to be independent of the real or estimated starting date and a comparison was possible. A similar time scale was used, because the k values proved to be sensitive to time scale. Maximum size reached by D. lucidum was 6.9 mm and by D. depressissimum 9.38 mm. Growth rates (k) fluctuated from 1.302 to 1.368 in the first and 1.339 to 1.509 in the second species. No statistically significant differences were found in growth curves among species inhabiting the Paiva pond and in the different IMG water bodies independent of the beginning of each cohort and maximum size. In general, no winter cohorts were observed, except in one population of D. kermatoides (IMG). Comparing circannual and biannual growth rhythms most of the species reached 60 % of their development during their first year, and 85 % or more during their second year. |
publishDate |
2007 |
dc.date.none.fl_str_mv |
2007-07-30 |
dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Articulo http://purl.org/coar/resource_type/c_6501 info:ar-repo/semantics/articulo |
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article |
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publishedVersion |
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http://sedici.unlp.edu.ar/handle/10915/83041 |
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dc.language.none.fl_str_mv |
eng |
language |
eng |
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info:eu-repo/semantics/altIdentifier/issn/0034-7744 info:eu-repo/semantics/altIdentifier/doi/10.15517/rbt.v55i2.6031 |
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info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International (CC BY 4.0) |
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openAccess |
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