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dc.date.accessioned 2014-06-13T17:47:11Z
dc.date.available 2014-06-13T17:47:11Z
dc.date.issued 2009-05
dc.identifier.uri http://sedici.unlp.edu.ar/handle/10915/36578
dc.description.abstract The study object was an Odontesthes bonariensis (Valenciennes, 1835) population of a characteristically shallow lake from the pampasic region. Over one year, zooplankton and fish samples were collected monthly. As a function of time and gender, several indices were investigated (relative weight, mesentery fat index, gonadosomatic index, hepatosomatic index and somatic index) and were related to zooplanktonic community dynamics, the main energy food source for this species. The results indicate that the seasonal information contained in the weight compartments is most important in mesentery fat, gonads and liver. The zooplankton availability modulates reserves (fat) behaviour and physiologic activity (liver), determining spawn intensity. Thus, in spring spawns, with higher zooplankton availability, mature individuals of the population, males and females, transfer energy from the food to the gonads. In autumn spawns, they use the fat reserves for gonad ripening. en
dc.format.extent 389-395 es
dc.language pt es
dc.subject ecosystem en
dc.subject Argentina es
dc.subject condition en
dc.subject energy metabolism en
dc.subject energy allocation en
dc.subject fish en
dc.subject Odontesthes bonariensis en
dc.subject physiology en
dc.subject zooplanktonic community en
dc.subject zooplankton en
dc.subject Atheriniformes en
dc.subject Teleostei en
dc.title Seasonal changes in the somatic indices of the freshwater silverside, Odontesthes bonariensis (Teleostei, Atheriniformes) from a Neotropical shallow lake (Argentina) en
dc.title.alternative Mudanças sazonais nos índices somáticos do Odontesthes bonariensis (Teleostei, Atheriniformes) em uma lagoa da região Neotropical (Argentina) pt
dc.type Articulo es
sedici.identifier.uri http://www.scielo.br/pdf/bjb/v69n2/23.pdf es
sedici.identifier.issn 1519-6984 es
sedici.creator.person Freyre, Lauce Rubén es
sedici.creator.person Colautti, Darío C. es
sedici.creator.person Maroñas, Miriam E. es
sedici.creator.person Sendra, Eduardo Daniel es
sedici.creator.person Marino de Remes Lenicov, Ana María es
sedici.subject.materias Ciencias Naturales es
sedici.subject.materias Biología es
sedici.description.fulltext true es
mods.originInfo.place Facultad de Ciencias Naturales y Museo es
sedici.subtype Articulo es
sedici.rights.license Creative Commons Attribution-NonCommercial 3.0 Unported (CC BY-NC 3.0)
sedici.rights.uri http://creativecommons.org/licenses/by-nc/3.0/
sedici.description.peerReview peer-review es
sedici.relation.journalTitle Brazilian Journal of Biology es
sedici.relation.journalVolumeAndIssue vol. 69, no. 2 es

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Creative Commons Attribution-NonCommercial 3.0 Unported (CC BY-NC 3.0) Except where otherwise noted, this item's license is described as Creative Commons Attribution-NonCommercial 3.0 Unported (CC BY-NC 3.0)