Population dynamics of Excirolana armata (Isopoda: Cirolanidae) in Buenos Aires beaches, Argentina
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| Format: | Artículo científico |
| Language: | en |
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Universidad de Costa Rica
2007
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| author | G. A. Thompson |
| author_facet | G. A. Thompson |
| contents | Population dynamics of Excirolana armata (Isopoda: Cirolanidae) in Buenos Aires beaches, Argentina G. A. Thompson M. Sánchez de Bock Biología cirolanids sandy beaches Excirolana armata population dynamics The population dynamics and structure of the cirolanid isopod Excirolana armata were studied fromJanuary 2004 through March 2005 in three sandy beaches of Buenos Aires Province (Argentina). Beaches withdifferent types of anthropogenic influences were selected. The von Bertalanffys growth function parameterswere determined for each population. There was a marked fluctuation in growth, with lowest rates in late autumnand winter. The isopod population of the beach exposed to the highest degree of anthropogenic erosion had thelowest and most stable values of abundance and biomass, the highest mortality rate and the shortest life span.Temporal fluctuations of the allometric coefficient of the length-dry weight relationship indicated a cycling pattern,with lowest values during the autumn-winter period and peak values in the summer. Females predominatedin the populations due to the short duration of the reproductive season. Argentine and Uruguayan populationsshowed similar growth performance indices, but differed in their abundance and biomass values, probably asa response to variations in beach morphodynamics and biological interactions. Rev. Biol. Trop. 55 (Suppl. 1):131-140. Epub 2007 June, 29. 2007 artículo científico 0034-7744 https://www.redalyc.org/articulo.oa?id=44909917 https://www.redalyc.org/journal/449/44909917/ https://www.redalyc.org/journal/449/44909917/html/ https://www.redalyc.org/journal/449/44909917/44909917.epub https://www.redalyc.org/journal/449/44909917/movil en http://www.redalyc.org/revista.oa?id=449 Revista de Biología Tropical application/pdf Universidad de Costa Rica Revista de Biología Tropical (Costa Rica) Num.1 Vol.55 |
| format | Artículo científico |
| id | redalyc_44909917 |
| institution | Redalyc |
| language | en |
| publishDate | 2007 |
| publisher | Universidad de Costa Rica |
| spellingShingle | Population dynamics of Excirolana armata (Isopoda: Cirolanidae) in Buenos Aires beaches, Argentina G. A. Thompson Biología cirolanids sandy beaches Excirolana armata population dynamics Population dynamics of Excirolana armata (Isopoda: Cirolanidae) in Buenos Aires beaches, Argentina G. A. Thompson M. Sánchez de Bock Biología cirolanids sandy beaches Excirolana armata population dynamics The population dynamics and structure of the cirolanid isopod Excirolana armata were studied fromJanuary 2004 through March 2005 in three sandy beaches of Buenos Aires Province (Argentina). Beaches withdifferent types of anthropogenic influences were selected. The von Bertalanffys growth function parameterswere determined for each population. There was a marked fluctuation in growth, with lowest rates in late autumnand winter. The isopod population of the beach exposed to the highest degree of anthropogenic erosion had thelowest and most stable values of abundance and biomass, the highest mortality rate and the shortest life span.Temporal fluctuations of the allometric coefficient of the length-dry weight relationship indicated a cycling pattern,with lowest values during the autumn-winter period and peak values in the summer. Females predominatedin the populations due to the short duration of the reproductive season. Argentine and Uruguayan populationsshowed similar growth performance indices, but differed in their abundance and biomass values, probably asa response to variations in beach morphodynamics and biological interactions. Rev. Biol. Trop. 55 (Suppl. 1):131-140. Epub 2007 June, 29. 2007 artículo científico 0034-7744 https://www.redalyc.org/articulo.oa?id=44909917 https://www.redalyc.org/journal/449/44909917/ https://www.redalyc.org/journal/449/44909917/html/ https://www.redalyc.org/journal/449/44909917/44909917.epub https://www.redalyc.org/journal/449/44909917/movil en http://www.redalyc.org/revista.oa?id=449 Revista de Biología Tropical application/pdf Universidad de Costa Rica Revista de Biología Tropical (Costa Rica) Num.1 Vol.55 |
| title | Population dynamics of Excirolana armata (Isopoda: Cirolanidae) in Buenos Aires beaches, Argentina |
| topic | Biología cirolanids sandy beaches Excirolana armata population dynamics |
| url | https://www.redalyc.org/articulo.oa?id=44909917 https://www.redalyc.org/journal/449/44909917/ https://www.redalyc.org/journal/449/44909917/html/ https://www.redalyc.org/journal/449/44909917/44909917.epub https://www.redalyc.org/journal/449/44909917/movil |