https://publicacionescd.uleam.edu.ec/index.php/yaku <p>The Journal of Marine Sciences and Aquaculture YAKU emerges as an initiative of Laica Eloy Alfaro University of Manabí with the purpose of disseminating relevant scientific research on the biology, conservation of aquatic species, and their interaction with the environment.</p> <p>Published semi-annually, "YAKU" serves as a specialized medium aimed at researchers, students, and the scientific community, both nationally and internationally. The journal is dedicated to publishing original articles, systematic reviews, technical notes, and brief communications, addressing topics that go beyond pure research, exploring the influence of the environment on the health and development of aquatic ecosystems.</p> <p>It is important to highlight that the publication rights for these contributions are granted by the authors, who assume a manifest ethical responsibility regarding the content of their works. The mission of "YAKU" lies in fostering the dissemination of scientific knowledge in the field of marine sciences and aquaculture, thus contributing to the advancement and understanding of these fields in an environmental context.</p> Editorial Universitario ULEAM es-ES Revista de Ciencias del Mar y Acuicultura YAKU. ISSN: 2600-5824. 2600-5824 https://publicacionescd.uleam.edu.ec/index.php/yaku/article/view/1086 <p style="font-weight: 400;">The study evaluated the relationship between bioaerosols generated in the Calceta oxidation lagoon and the presence of bacteria resistant to high concentrations of azithromycin and tetracycline. Bioaerosol samples were collected inside and outside the lagoon, revealing a significant reduction in colony-forming unit counts with antibiotic treatments compared to controls, demonstrating a dose-dependent relationship. High doses (150 mg/L) were more effective, reducing counts to nearly zero in some monitored points, while low doses (75 mg/L) were less effective. Microbiological analysis identified Gram-positive staphylococci resistant to antibiotics, highlighting the adaptability of microorganisms to high concentrations of these compounds. The results underscore the need for strategies to mitigate antibiotic contamination, such as advanced wastewater treatment and continuous monitoring of resistant bacteria. Furthermore, the importance of research in Ecuador is emphasized, given the limited evaluation of bioaerosols in oxidation ponds and its impact on other ecosystems.</p> Luis Basurto Joy Macias Carlos Banchón Copyright (c) 2025 Revista de Ciencias del Mar y Acuicultura YAKU. ISSN: 2600-5824. http://creativecommons.org/licenses/by-nc-sa/4.0 2025-03-28 2025-03-28 8 14 1 15 10.56124/yaku.v8i14.001 https://publicacionescd.uleam.edu.ec/index.php/yaku/article/view/1336 <p>Biofertilizers based on macroalgae improve the growth of agricultural crops and at the same time contribute to the environment, being these a chemical-free option. An evaluation was carried out on lentil (Lens culinaris) and bean (Vigna unguiculata) crops, which were classified into 3 treatments, one of which was a control, to which a biofertilizer preparation based on Padina pavonica was applied in two different concentrations for the treatments. An experimental design was developed, where in the control treatment neither concentration was applied, in treatment 1 a concentration of 13.3 g/l was used and in treatment 2 a concentration of 26.6 g/l under controlled conditions. The plants treated with the prepared product show significantly greater growth than those of the control group. The biofertilizer proved to be effective in growth, validating its potential as a sustainable alternative to chemical fertilizers. The methodology included the collection of P. pavonica on the Barbasquillo beach, its processing and analysis in the laboratory. Statistical tests (ANOVA and Kruskal-Wallis) were performed to confirm significant differences. The treatment with the highest concentration (26.6 g/l) showed better results in both crops. The results highlight the capacity of macroalgae as ecological inputs, promoting agricultural sustainability and reducing dependence on agrochemicals. Thus, the biofertilizer based on the macroalga P. pavonica represents a promising innovation to improve crop productivity in a sustainable manner.</p> Jamileth Mendoza-Barros Evelyn Cedeño-Pilozo Eduardo Pico-Lozano Copyright (c) 2025 Revista de Ciencias del Mar y Acuicultura YAKU. ISSN: 2600-5824. http://creativecommons.org/licenses/by-nc-sa/4.0 2025-06-28 2025-06-28 8 14 16 28 10.56124/yaku.v8i14.002