Effect of food competition on Culex pipiens quinquefasciatus under laboratory conditions
Food competition in the larval phase of Culex pipiens quinquefasciatus and its effect on the adult stage was experimentally studied under laboratory conditions. Cohorts with different densities of initial first instar larvae (from 50 to 4000 individuals per g of food) were followed until adult emergence, including egg laying. The number of individuals in the cohorts were counted every two days, until all adults emerged. Adult females were fed every four days. Surviving adults and eggs laid were counted daily. The proportion of adult females, adult weight, and female fertility decreased as larval density increased. Adult longevity and female fecundity did not show a density dependent change. The generation time increased and the realized rate of natural increase and net rate of increase showed a negative relationship with larval density.
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Asociación Argentina de Ecología
1992
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rev-ecoaus-article-17382021-03-25T19:13:54Z Effect of food competition on Culex pipiens quinquefasciatus under laboratory conditions Efecto de la competencia por alimento en Culex pipiens quinquefasciatusbajo condiciones de laboratorio Gorla, David E. Ludueña Almeida, Francisco Serra, Gerardo Food competition in the larval phase of Culex pipiens quinquefasciatus and its effect on the adult stage was experimentally studied under laboratory conditions. Cohorts with different densities of initial first instar larvae (from 50 to 4000 individuals per g of food) were followed until adult emergence, including egg laying. The number of individuals in the cohorts were counted every two days, until all adults emerged. Adult females were fed every four days. Surviving adults and eggs laid were counted daily. The proportion of adult females, adult weight, and female fertility decreased as larval density increased. Adult longevity and female fecundity did not show a density dependent change. The generation time increased and the realized rate of natural increase and net rate of increase showed a negative relationship with larval density. Se estudió experimentalmente el efecto de la competencia por alimento era la fase larval de Culex pipiens quinquefasciatus y su efecto sobre el estado adulto, bajo condiciones de laboratorio. Cohortes con diferente densidad inicial de larvas de primer estadio (desde 50 a 4000 individuos por gramo de comida) fueron estudiadas hasta la emergencia de adultos, incluyendo la postura de huevos. El número de individuos en las cohortes fue contado cada dos días, hasta que todos los adultos emergieron. Las hembras adultas fueron alimentadas cada cuatro días. Los adultos sobrevivientes y los huevos puestos fueron contados diariamente. La proporción de hembras adultas, el peso de adultos y la fertilidad de hembras disminuyeron a medida que la densidad larval aumentó. La longevidad de adultos y la fecundidad de hembras no mostró un cambio densodependiente. El tiempo generacional se incrementó y la tasa intrínseca de crecimiento natural y la tasa neta de incremento mostraron una relación negativa con la densidad larval. Asociación Argentina de Ecología 1992-06-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Comunicaciones application/pdf https://ojs.ecologiaaustral.com.ar/index.php/Ecologia_Austral/article/view/1738 Ecología Austral; Vol. 2 No. 1 (1992); 057-061 Ecología Austral; Vol. 2 Núm. 1 (1992); 057-061 0327-5477 1667-7838 eng https://ojs.ecologiaaustral.com.ar/index.php/Ecologia_Austral/article/view/1738/1070 Derechos de autor 2021 Ecología Austral |
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Asociación Argentina de Ecología |
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eng |
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Digital |
| author |
Gorla, David E. Ludueña Almeida, Francisco Serra, Gerardo |
| spellingShingle |
Gorla, David E. Ludueña Almeida, Francisco Serra, Gerardo Effect of food competition on Culex pipiens quinquefasciatus under laboratory conditions |
| author_facet |
Gorla, David E. Ludueña Almeida, Francisco Serra, Gerardo |
| author_sort |
Gorla, David E. |
| title |
Effect of food competition on Culex pipiens quinquefasciatus under laboratory conditions |
| title_short |
Effect of food competition on Culex pipiens quinquefasciatus under laboratory conditions |
| title_full |
Effect of food competition on Culex pipiens quinquefasciatus under laboratory conditions |
| title_fullStr |
Effect of food competition on Culex pipiens quinquefasciatus under laboratory conditions |
| title_full_unstemmed |
Effect of food competition on Culex pipiens quinquefasciatus under laboratory conditions |
| title_sort |
effect of food competition on culex pipiens quinquefasciatus under laboratory conditions |
| description |
Food competition in the larval phase of Culex pipiens quinquefasciatus and its effect on the adult stage was experimentally studied under laboratory conditions. Cohorts with different densities of initial first instar larvae (from 50 to 4000 individuals per g of food) were followed until adult emergence, including egg laying. The number of individuals in the cohorts were counted every two days, until all adults emerged. Adult females were fed every four days. Surviving adults and eggs laid were counted daily. The proportion of adult females, adult weight, and female fertility decreased as larval density increased. Adult longevity and female fecundity did not show a density dependent change. The generation time increased and the realized rate of natural increase and net rate of increase showed a negative relationship with larval density. |
| publisher |
Asociación Argentina de Ecología |
| publishDate |
1992 |
| url |
https://ojs.ecologiaaustral.com.ar/index.php/Ecologia_Austral/article/view/1738 |
| work_keys_str_mv |
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