Gayana <p><strong><strong>ISSN <strong>0717-652X</strong> (print) </strong><strong>ISSN <strong>0717-6538</strong> (online)</strong></strong></p> <p><strong>GAYANA</strong> mainly receives contributions such as Original Article, Review, Short Communication, Editorial, and Book Review. Manuscripts are accepted in English or Spanish, although the use of the English language is encouraged.</p> <p><strong>WoS Impact Factor: </strong>0.559 (2020) 0.598 (5 years)</p> <p><strong>SciELO</strong> (Scientific Electronic Library Online): <a href="" target="_blank" rel="noopener"></a></p> en-US <p>Authors who publish with this journal agree to the following terms:</p> <ol> <li class="show">Authors retain copyright and grant the journal right of first publication.</li> <li class="show">The articles in this journal are published under&nbsp;<a href="" target="_blank" rel="noopener">Creative Commons Attribution-NonCommercial 4.0 International License</a> that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.</li> <li class="show">Authors are permitted and encouraged to post their work online (e.g., in institutional repositories, on their website or ResearchGate) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See<a href="" target="_new">The Effect of Open Access</a>).</li> </ol> (Fulgencio Lisón Gil) (Carlos Zamora-Manzur) Fri, 31 Dec 2021 00:00:00 -0300 OJS 60 Presence of Dromiciops (Microbiotheriidae) in a remnant of sclerophyllous forest in Península de Hualpén Nature Sanctuary, Chile <p>The modification of land use has caused the loss, fragmentation and degradation of the scarce remnant of native forest present in south-central Chile, habitat of marsupials of the genus <em>Dromiciops </em>(Microbiotheria). In this study, we explored the presence of <em>Dromiciops </em>through camera traps in a relict area of coastal mediterranean sclerophyllous forest. The presence of <em>Dromiciops </em>was recorded in four of the nine sites evaluated. This finding corresponds to the first formal record of <em>Dromiciops </em>in this area.</p> Cristian Ricardo Cortez Parra, Luis Gonzalo Torres-Fuentes Copyright (c) 2021 Cristian Ricardo Cortez Parra, Luis Gonzalo Torres-Fuentes Fri, 31 Dec 2021 00:00:00 -0300 First record of predation on an adult of Calyptocephalella gayi (Dúmeril & Bibron, 1841) (Anura, Calyptocephalellidae) by Ardea cocoi Linnaeus, 1766 (Pelecaniformes, Ardeidae) <p>We report for the first time the predation of an adult Chilean frog (<em>Calyptocephalella gayi</em>) by the Cocoi heron (<em>Ardea cocoi</em>), an event that was recorded in video. The observation was made in the summer of 2021 in a pond located in an area disturbed by livestock farming. This record adds to the scarce information about predation on Chilean frog, particularly on large adults, suggesting an important role of <em>A. cocoi </em>as a predator of aquatic amphibians in Chile.</p> Felipe Durán, Giovanni Peralta, Claudio Correa Copyright (c) 2021 Felipe Durán, Giovanni Peralta, Claudio Correa Fri, 31 Dec 2021 00:00:00 -0300 Multitrofic association between Raulí (Nothofagus alpina), Dihueñe (Cyttaria espinosae) and Anastomyza flies (Diptera: Heleomyzidae), La Araucanía Region, Chile <p>In this work we characterize the association between <em>Nothofagus alpina </em>(Nothofagaceae), <em>Cyttaria espinosae </em>Lloyd, (1917) (Leotiomycetes) and <em>Anastomyza </em>flies (Heleomyzidae). These dipterans were found as larvae mainly in <em>C. espinosae </em>with mature stromata, and as adults over open apothecia. This suggests that beside of feeding on reproductive structures, these <em>Anastomyza </em>may contribute with spore dispersion. We discuss about the factors allow the preservation of plant-fungi-insect ecological associations.</p> Ariel Aguilera, Cristian Villagra Copyright (c) 2021 Ariel Aguilera, Cristian Villagra Fri, 31 Dec 2021 00:00:00 -0300 Characterization of macroinvertebrate and fish assemblages in tributary rivers of the Biobío River: Their importance as priority areas for conservation <p>Fluvial systems are the most threatened ecosystems in the world by the development of anthropogenic activities. Advancing in the knowledge of the ecology of these systems is the basis for the creation of adequate management measures for the conservation of these systems. This study provides relevant background information on the structure of macroinvertebrate and fish assemblages in six tributary rivers of the Biobío River Basin, a basin characterised by high hydrological alteration and fragmentation index. Our results describe a good environmental condition in the rivers evaluated, with the Lirquén, Quilme and Mininco rivers standing out as water courses with a high richness and diversity of macroinvertebrate and fish species. Structurally, these rivers are a refuge for native fish species classified as Endangered (<em>Nematogenys inermis, Bullockia maldonadoi, Percilia irwini, Diplomystes nahuelbutaensis</em>). In this sense, the fundamental role of these as reservoirs of species and the importance at basin level of maintaining the connectivity of these tributaries with the main course, and not only the conservation of each river in a segregated way, is pointed out.</p> Natalia Sandoval, Anaysa Elgueta-Herrera, Jorge Gonzalez, Cristian Godoy Barbieri Copyright (c) 2021 Natalia Sandoval, Anaysa Elgueta-Herrera, Jorge Gonzalez, Cristian Godoy Barbieri Fri, 31 Dec 2021 00:00:00 -0300 Seasonal and spatial variability of aquatic macroinvertebrates and water quality in the Palena River, Chilean Patagonia <p>The rivers of Patagonia are some of the best conserved aquatic ecosystems in South America; however. However due to the growing economic development in the region, several bodies of water have been threatened by human activities. We analyzed the water quality and structure of macroinvertebrate assemblages at 8 stations along the Palena River; upstream, where there is minimal disturbance, and downstream, at stations perturbed by human activities. Samples were collected over the four seasons of the year (September 2013 to May 2014). Temperature, electrical conductivity, pH, dissolved oxygen, total hardness, silica, aluminum and iron showed significant differences (p &lt; 0.05) between stations located upstream and downstream in the river basin, as well as between seasons of the year. A total of 30 macroinvertebrate families were registered (90% insect larvae), being Diptera the most diverse order (8 families). Leptophlebiidae family (Ephemeroptera) was the most abundant family in the four seasons of the year throughout. Statistically, there were significant differences (p &lt; 0.05) between seasons of the year, which were grouped in two groups: one summer-fall and winter-spring, but not to macroinvertebrate assemblages between stations upstream and downstream. These findings indicate that the seasonal variations have a greater effect on the macroinvertebrates assemblage composition than the spatial differences in the basin. On the other hand, the great diversity of macroinvertebrates registered in the Palena River, in addition to the good water quality, indicate that the activities in the basin are not yet a risk to the aquatic ecosystem.</p> Carlos Leal-Bastidas, Luis Vargas-Chacoff, Natalia Sandoval, Pablo Fierro Copyright (c) 2021 Carlos Leal-Bastidas, Luis Vargas-Chacoff, Natalia Sandoval, Pablo Fierro Fri, 31 Dec 2021 00:00:00 -0300