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
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/83041

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network_name_str SEDICI (UNLP)
spelling 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
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info:eu-repo/semantics/publishedVersion
Articulo
http://purl.org/coar/resource_type/c_6501
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url http://sedici.unlp.edu.ar/handle/10915/83041
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/0034-7744
info:eu-repo/semantics/altIdentifier/doi/10.15517/rbt.v55i2.6031
dc.rights.none.fl_str_mv 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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