Seasonal changes in the somatic indices of the freshwater silverside, <i>Odontesthes bonariensis</i> (Teleostei, Atheriniformes) from a Neotropical shallow lake (Argentina)
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, mes...
Guardado en:
| Autores principales: | , , , , |
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| Formato: | Articulo |
| Lenguaje: | Portugués |
| Publicado: |
2009
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| Materias: | |
| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/36578 http://www.scielo.br/pdf/bjb/v69n2/23.pdf |
| Aporte de: |
| id |
I19-R120-10915-36578 |
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| record_format |
dspace |
| institution |
Universidad Nacional de La Plata |
| institution_str |
I-19 |
| repository_str |
R-120 |
| collection |
SEDICI (UNLP) |
| language |
Portugués |
| topic |
Ciencias Naturales Biología ecosystem condition energy metabolism energy allocation fish Odontesthes bonariensis physiology zooplanktonic community zooplankton Atheriniformes Teleostei Argentina |
| spellingShingle |
Ciencias Naturales Biología ecosystem condition energy metabolism energy allocation fish Odontesthes bonariensis physiology zooplanktonic community zooplankton Atheriniformes Teleostei Argentina Freyre, Lauce Rubén Colautti, Darío César Maroñas, Miriam Edith Sendra, Eduardo Daniel Remes Lenicov, Mauricio Seasonal changes in the somatic indices of the freshwater silverside, <i>Odontesthes bonariensis</i> (Teleostei, Atheriniformes) from a Neotropical shallow lake (Argentina) |
| topic_facet |
Ciencias Naturales Biología ecosystem condition energy metabolism energy allocation fish Odontesthes bonariensis physiology zooplanktonic community zooplankton Atheriniformes Teleostei Argentina |
| description |
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. |
| format |
Articulo Articulo |
| author |
Freyre, Lauce Rubén Colautti, Darío César Maroñas, Miriam Edith Sendra, Eduardo Daniel Remes Lenicov, Mauricio |
| author_facet |
Freyre, Lauce Rubén Colautti, Darío César Maroñas, Miriam Edith Sendra, Eduardo Daniel Remes Lenicov, Mauricio |
| author_sort |
Freyre, Lauce Rubén |
| title |
Seasonal changes in the somatic indices of the freshwater silverside, <i>Odontesthes bonariensis</i> (Teleostei, Atheriniformes) from a Neotropical shallow lake (Argentina) |
| title_short |
Seasonal changes in the somatic indices of the freshwater silverside, <i>Odontesthes bonariensis</i> (Teleostei, Atheriniformes) from a Neotropical shallow lake (Argentina) |
| title_full |
Seasonal changes in the somatic indices of the freshwater silverside, <i>Odontesthes bonariensis</i> (Teleostei, Atheriniformes) from a Neotropical shallow lake (Argentina) |
| title_fullStr |
Seasonal changes in the somatic indices of the freshwater silverside, <i>Odontesthes bonariensis</i> (Teleostei, Atheriniformes) from a Neotropical shallow lake (Argentina) |
| title_full_unstemmed |
Seasonal changes in the somatic indices of the freshwater silverside, <i>Odontesthes bonariensis</i> (Teleostei, Atheriniformes) from a Neotropical shallow lake (Argentina) |
| title_sort |
seasonal changes in the somatic indices of the freshwater silverside, <i>odontesthes bonariensis</i> (teleostei, atheriniformes) from a neotropical shallow lake (argentina) |
| publishDate |
2009 |
| url |
http://sedici.unlp.edu.ar/handle/10915/36578 http://www.scielo.br/pdf/bjb/v69n2/23.pdf |
| work_keys_str_mv |
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