Aquatic invertebrates related to Egeria naias with special reference to the phytopagous organisms
The qualitative and quantitative composition of the “meso” and “macrofauna” occurring in Egeria najas in Totoras Pond (Riachuelo River basin, Corrientes, Argentina) is described, with special attention to phytophagous species that may cause varying degrees of damage to this aquatic plant. Samples we...
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| Formato: | Artículo revista |
| Lenguaje: | Español |
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Centro de Ecología Aplicada del Litoral (Consejo Nacional de Investigaciones Científicas y Técnicas - Universidad Nacional de Nordeste)
2025
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| Acceso en línea: | https://revistas.unne.edu.ar/index.php/eco/article/view/8529 |
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I48-R154-article-85292025-08-08T13:52:28Z Aquatic invertebrates related to Egeria naias with special reference to the phytopagous organisms Invertebrados acuáticos relacionados a Egeria naias (Planch) con especial referencia a los organismos fitófagos Poi de Neiff, Alicia The qualitative and quantitative composition of the “meso” and “macrofauna” occurring in Egeria najas in Totoras Pond (Riachuelo River basin, Corrientes, Argentina) is described, with special attention to phytophagous species that may cause varying degrees of damage to this aquatic plant. Samples were collected monthly using a 35 cm diameter net capable of retaining a plant biomass ranging from 25 to 40 g (dry weight) during the period 1975–1977. The plants were drained on sieves with mesh sizes of 500, 250, and 125 μm to remove the organisms present, and results were expressed as the number of invertebrates per 1000 g of dry weight of Egeria najas. The fauna associated with this submerged plant showed seasonal variation, reaching a maximum in summer (320,000 ind./1000 g) and a minimum in winter (10,000 ind./1000 g). In the sampling area, near the water surface and the littoral zone, Acari was the most abundant group, with a clear dominance of Hydrozetes platensis. The most relevant phytophagous species occurred in low proportions and were represented by insects and mollusks. Among them, the most notable species was Ilodites lembulus (Curculionidae). Se describe la composición cualitativa y cuantitativa de la “meso” y “macrofauna” presente en Egeria najas en la laguna Totoras (cuenca del río Riachuelo, Corrientes, Argentina), prestando especial atención a aquellas especies fitófagas que pueden causar daños variables a esta planta acuática. Las muestras se recolectaron mensualmente utilizando una red de 35 cm de diámetro, capaz de retener una biomasa vegetal de entre 25 y 40 g (peso seco), durante el período 1975–1977. Las plantas se drenaron sobre tamices con aberturas de 500, 250 y 125 μm para extraer los organismos presentes, y los resultados se expresaron como número de invertebrados por 1000 g de peso seco de Egeria najas. La fauna asociada a esta planta sumergida presentó variaciones estacionales, alcanzando un máximo en verano (320.000 ind./1000 g) y un mínimo en invierno (10.000 ind./1000 g). En el área de muestreo, cercana a la superficie del agua y a la zona litoral, el grupo más abundante fue el de los ácaros (Acari), con un claro predominio de Hydrozetes platensis. Las especies fitófagas más relevantes aparecieron en bajas proporciones y estuvieron representadas por insectos y moluscos. En este sentido, la especie más destacada fue Ilodites lembulus (Curculionidae). Centro de Ecología Aplicada del Litoral (Consejo Nacional de Investigaciones Científicas y Técnicas - Universidad Nacional de Nordeste) 2025-08-08 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Artículo revisado por pares application/pdf https://revistas.unne.edu.ar/index.php/eco/article/view/8529 Ecosur; 1979: vol. 6, no. 11; 101-109 0325-108X spa https://revistas.unne.edu.ar/index.php/eco/article/view/8529/8074 |
| institution |
Universidad Nacional del Nordeste |
| institution_str |
I-48 |
| repository_str |
R-154 |
| container_title_str |
Revistas UNNE - Universidad Nacional del Noroeste (UNNE) |
| language |
Español |
| format |
Artículo revista |
| author |
Poi de Neiff, Alicia |
| spellingShingle |
Poi de Neiff, Alicia Aquatic invertebrates related to Egeria naias with special reference to the phytopagous organisms |
| author_facet |
Poi de Neiff, Alicia |
| author_sort |
Poi de Neiff, Alicia |
| title |
Aquatic invertebrates related to Egeria naias with special reference to the phytopagous organisms |
| title_short |
Aquatic invertebrates related to Egeria naias with special reference to the phytopagous organisms |
| title_full |
Aquatic invertebrates related to Egeria naias with special reference to the phytopagous organisms |
| title_fullStr |
Aquatic invertebrates related to Egeria naias with special reference to the phytopagous organisms |
| title_full_unstemmed |
Aquatic invertebrates related to Egeria naias with special reference to the phytopagous organisms |
| title_sort |
aquatic invertebrates related to egeria naias with special reference to the phytopagous organisms |
| description |
The qualitative and quantitative composition of the “meso” and “macrofauna” occurring in Egeria najas in Totoras Pond (Riachuelo River basin, Corrientes, Argentina) is described, with special attention to phytophagous species that may cause varying degrees of damage to this aquatic plant. Samples were collected monthly using a 35 cm diameter net capable of retaining a plant biomass ranging from 25 to 40 g (dry weight) during the period 1975–1977. The plants were drained on sieves with mesh sizes of 500, 250, and 125 μm to remove the organisms present, and results were expressed as the number of invertebrates per 1000 g of dry weight of Egeria najas.
The fauna associated with this submerged plant showed seasonal variation, reaching a maximum in summer (320,000 ind./1000 g) and a minimum in winter (10,000 ind./1000 g). In the sampling area, near the water surface and the littoral zone, Acari was the most abundant group, with a clear dominance of Hydrozetes platensis.
The most relevant phytophagous species occurred in low proportions and were represented by insects and mollusks. Among them, the most notable species was Ilodites lembulus (Curculionidae). |
| publisher |
Centro de Ecología Aplicada del Litoral (Consejo Nacional de Investigaciones Científicas y Técnicas - Universidad Nacional de Nordeste) |
| publishDate |
2025 |
| url |
https://revistas.unne.edu.ar/index.php/eco/article/view/8529 |
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2025-08-17T05:02:44Z |
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