Growth rate fitting using the von Bertalanffy model: analysis of natural populations of Drepanotrema spp. snails (Gastropoda: Planorbidae)
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| Formato: | Online |
| Idioma: | eng |
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Universidad de Costa Rica
2007
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| Acceso en línea: | https://revistas.ucr.ac.cr/index.php/rbt/article/view/6031 |
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RBT6031 |
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RBT60312022-05-30T19:05:50Z Growth rate fitting using the von Bertalanffy model: analysis of natural populations of Drepanotrema spp. snails (Gastropoda: Planorbidae) Growth rate fitting using the von Bertalanffy model: analysis of natural populations of Drepanotrema spp. snails (Gastropoda: Planorbidae) Rumi, Alejandra E. Gutiérrez Gregoric, Diego Andrea Roche, M. Tasa de crecimiento Drepanotrema spp. Planorbidae Argentina Cuenca del Plata Growth-rates Great Plata Basin 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. Universidad de Costa Rica 2007-06-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Article Text application/pdf https://revistas.ucr.ac.cr/index.php/rbt/article/view/6031 10.15517/rbt.v55i2.6031 Revista de Biología Tropical; Vol. 55 No. 2 (2007): Volume 55 – Regular number 2 – June 2007; 559–567 Revista de Biología Tropical; Vol. 55 Núm. 2 (2007): Volumen 55 – Número regular 2 – Junio 2007; 559–567 Revista Biología Tropical; Vol. 55 N.º 2 (2007): Volume 55 – Regular number 2 – June 2007; 559–567 2215-2075 0034-7744 10.15517/rbt.v55i2 eng https://revistas.ucr.ac.cr/index.php/rbt/article/view/6031/5736 Copyright (c) 2007 Revista de Biología Tropical http://creativecommons.org/licenses/by/4.0 |
| institution |
Universidad de Costa Rica |
| collection |
Revista de Biología Tropical |
| language |
eng |
| format |
Online |
| author |
Rumi, Alejandra E. Gutiérrez Gregoric, Diego Andrea Roche, M. |
| spellingShingle |
Rumi, Alejandra E. Gutiérrez Gregoric, Diego Andrea Roche, M. Growth rate fitting using the von Bertalanffy model: analysis of natural populations of Drepanotrema spp. snails (Gastropoda: Planorbidae) |
| author_facet |
Rumi, Alejandra E. Gutiérrez Gregoric, Diego Andrea Roche, M. |
| author_sort |
Rumi, Alejandra |
| title |
Growth rate fitting using the von Bertalanffy model: analysis of natural populations of Drepanotrema spp. snails (Gastropoda: 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) |
| title_alt |
Growth rate fitting using the von Bertalanffy model: analysis of natural populations of Drepanotrema spp. snails (Gastropoda: Planorbidae) |
| publisher |
Universidad de Costa Rica |
| publishDate |
2007 |
| url |
https://revistas.ucr.ac.cr/index.php/rbt/article/view/6031 |
| work_keys_str_mv |
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| _version_ |
1810114583178772480 |