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Universidad de Panamá
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Submitted January 5, 2022
Published 2022-01-05

Artículos

Vol. 24 No. 1 (2022): Tecnociencia

STRUCTURE OF DRIFTING AQUATIC INSECTS AND ITS RELATIONSHIP WITH THE BENTHOS AQUATIC INSECT COMMUNITY, IN A SECTION OF THE ZARATÍ RIVER, PROVINCE OF COCLÉ, PANAMA.

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Citación:
DOI: ND

Published: 2022-01-05

How to Cite

Rodríguez, C., Jurado, Y. and Rodríguez, V. (2022) “ PANAMA”., Tecnociencia, 24(1), pp. 45–71. Available at: https://revistas.up.ac.pa/index.php/tecnociencia/article/view/2570 (Accessed: 28 September 2024).
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Abstract

Sampling was conducted to determine the numeric structure of drifting aquatic insects and their relationship with the benthic insect numeric structure, in a section of the Zaratí River, Coclé, Panama. Field work took place once a week, during June to September 2019 for a total of 12 sampling campaigns in the selected river section. For collection of drifting insects, two traps with an area of 0,176 m2 and 500 ?m were used and placed against the current. Drifting traps remained submerged during the sampling period and were emptied every 12 hours from 06:00 to 18: 00 h and 18:00 to 06:00 h, while D-Nets were used for benthic insect collection. A total of 3 984 aquatic insects were collected, where 1 387 belonged to the drifting and 2 597 to the benthic groups, respectively. The most abundant orders of the drifting group were Ephemeroptera, Trichopteran, Diptera and Coleoptera, whereas the benthic group most abundant orders were Trichopteran, Ephemeroptera, Odonata and Heteropteran. The highest aquatic insect abundance in the drifting group was recorded during nocturnal periods implying behavioral drifting, supporting the hypothesis that drifting as a predation escape mechanism. Jaccard similarity index between aquatic insect genera in the drifting group and benthic group was IJ = 52 %. This indicates that the largest part of taxa move through drifting and the fraction of drifting aquatic insect’s numeric structure is a reflex of the benthic numeric structure.

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