https://journaljalsi.com/index.php/JALSI <p><strong>Journal of Applied Life Sciences International (ISSN: 2394-1103)</strong> aims to publish high quality papers (<a href="https://journaljalsi.com/index.php/JALSI/general-guideline-for-authors">Click here for Types of paper</a>) in all areas of ‘applied life sciences’. By not excluding papers based on novelty, this journal facilitates the research and wishes to publish papers as long as they are technically correct and scientifically motivated. The journal also encourages the submission of useful reports of negative results. This is a quality controlled, OPEN peer-reviewed, open-access INTERNATIONAL journal.</p> <p><strong>NAAS Score: 4.53 (2025)</strong></p> SCIENCEDOMAIN international en-US Journal of Applied Life Sciences International 2394-1103 https://journaljalsi.com/index.php/JALSI/article/view/729 <p>This study investigated the gill parasitofauna of the cichlid fish <em>Hemichromis fasciatus</em> in sectors III and IV of the Ebrie Lagoon, areas subjected to varying anthropogenic pressures, from February 2019 to January 2020. Using standard parasitological methods, five (5) Monogenean species were identified: <em>Cichlidogyrus falcifer</em>, <em>C. sanseoi</em>, <em>C. longicirrus</em>, <em>Onchobdella voltensis</em>, and <em>O. bopeleti</em>. Spatial analysis revealed higher parasite infestations (P = 96.12%; IM = 26.22±0.2) in fish from sector III, which was characterized by lower oxygen levels (2.5 g/l) and reduced water transparency, compared to sector IV. Additionally, host sex significantly influenced parasitic burden. Condition factor assessments showed that infested fish had poorer body condition (K = 0.48±0.2 g/cm³) than non-infested individuals (K = 1.6±0.2 g/cm³), highlighting the detrimental effects of parasitic infections on host health. These findings emphasize the role of environmental and biological factors in shaping parasite dynamics in lagoon ecosystems.</p> Yedehi Euphrasie ADOU Kassi Georges BLAHOUA Bouaye Carole Sérincia ADOU Nounagnon Darius TOSSAVI Yamba SINARÉ Seydou TIHO Copyright (c) 2025 Author(s). The licensee is the journal publisher. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. 2025-10-14 2025-10-14 28 6 1 10 10.9734/jalsi/2025/v28i6729