Muerte embrionaria como probable razón para el colapso de la densidad de población en Lymantria dispar (Linnaeus, 1758) (Lepidoptera: Erebidae, Lymantriinae)

Autores/as

DOI:

https://doi.org/10.57065/shilap.939

Palabras clave:

Lepidoptera, Erebidae, Lymantriinae, Lymantria dispar, dinámica de poblaciones, muerte embrionaria, nucleopolihedrovirus

Resumen

Se investiga por primera vez con métodos bioquímicos y moleculares, las causas de la muerte masiva de embriones en una población de Lymantria dispar (Linnaeus1758). En este estudio se recogieron y analizaron masas de huevos de dos poblaciones en el territorio de Rusia: con baja (la población siberiana occidental) y alta densidad (Trans-Ural), respectivamente. La eclosión en primavera de las larvas de los huevos, guardados bajo condiciones contantes del laboratorio a 2º C, fue dos veces menor (la mitad) en las poblaciones de insectos de la Trans-Ural (TU) que en la del oeste siberiano (WS) (43 ± 6 % y 86 ± 7 % respectivamente). El nivel de virus definido por PCR para las poblaciones de TU y WS era de 76 ± 9 % y 36 ± 6 %, respectivamente. La mayoría de los componentes importantes de los huevos eran prácticamente los mismos entre las poblaciones. Sin embargo, encontramos una presencia reducida de proteínas importantes para la embriogénesis en la población de TU, como por ejemplo,una molécula parecida al pro-arilforin y una falta del componente pro-vitelín 2. Los datos de campo fueron comparables a éstos del laboratorio, y en las poblaciones de TU, había un decrecimiento de la densidad. Los resultados obtenidos indican que la alteración en el balance hormonal de los insectos infectados con nucleopolihedrovirus (NPV) podría llevar a un disminucion o falta de algunas proteínas de la embriogénesis en huevos. Puede influir en el desarrollo de las larvas desde los huevos y, en consecuencia, en la dinámica de población del lepidóptero.

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Publicado

29-06-2024

Cómo citar

Ilyinykh, A., Dubovskiy, I., Polenogova, O., Ponomarev, V., & Glupov, V. (2024). Muerte embrionaria como probable razón para el colapso de la densidad de población en Lymantria dispar (Linnaeus, 1758) (Lepidoptera: Erebidae, Lymantriinae). SHILAP Revista De lepidopterología, 45(179), 457–465. https://doi.org/10.57065/shilap.939

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