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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| Sumario: | 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). |
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