https://www.ajouronline.com/index.php/AJAS en-US <ul> <li class="show">Papers must be submitted on the understanding that they have not been published elsewhere (except in the form of an abstract or as part of a published lecture, review, or thesis) and are not currently under consideration by another journal published by any other publisher.</li> <li class="show">It is also the authors responsibility to ensure that the articles emanating from a particular source are submitted with the necessary approval.</li> <li class="show">The authors warrant that the paper is original and that he/she is the author of the paper, except for material that is clearly identified as to its original source, with permission notices from the copyright owners where required.</li> <li class="show">The authors ensure that all the references carefully and they are accurate in the text as well as in the list of references (and vice versa).</li> <li class="show">Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a&nbsp;<a href="https://creativecommons.org/licenses/by-nc/4.0/" target="_new">Attribution-NonCommercial 4.0 International</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 able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.</li> <li class="show">Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) 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&nbsp;<a href="http://opcit.eprints.org/oacitation-biblio.html" target="_new">The Effect of Open Access</a>).</li> <li class="show">The journal/publisher is not responsible for subsequent uses of the work. It is the author's responsibility to bring an infringement action if so desired by the author.</li> </ul> ajas@ajouronline.com (Managing Editor) admin@ajouronline.com (Administrator) Sat, 25 Mar 2023 03:44:34 +0000 OJS 3.3.0.8 http://blogs.law.harvard.edu/tech/rss 60 https://www.ajouronline.com/index.php/AJAS/article/view/7134 <p>Culture of Sarotherodon melanotheron presents major difficulty, which is the valorization of artificial food by this species. Thus, this study aims to identify preferential prey of this species in three aquatic ecosystems (sector VI of Ebrié lagoon, Ayamé Lake 1 and Aby-Nord lagoon), with a view to developing natural food resources in farming environments. The sampling was carried out from March 2017 to February 2018 using 80 to 100 mm gillnets. Stomachs of 343 specimens were analyzed by microscopic observation, preys were identified, feed index (AI) was calculated and nutritional quality of food bolus has been determined. IA shows a preference of specimens from sector VI for Coscinodiscus sp. at dry season (IA=58.63%), rainy season (IA=65.97%) and flood season (IA=21.06%). Coscinodiscus sp. remains an essential prey in Aby lagoon at high rainy season (IA=45.66%), a dominant prey at small dry season (IA=76.06%) and small rainy season (IA=92.29%). On the other hand, in Ayamé Lake 1, Aulacoseira sp. is important prey (IA =19.03%) in high dry season, essential prey (IA=48.19%) at high rainy season and dominant prey (IA=61.21%) at small dry season. At alimentary bolus, highest contents of proteins (22.44%) and lipids (2.36%) were obtained at high dry season in the Aby lagoon. The contents of hydrolysable organic matter (4499.50 to 781.3 mg.g-1) and minerals (161.3 to 406.2 mg.g-1) remain high in three aquatic ecosystem regardless of the season. In conclusion, species has a preference for genera Coscinodiscus sp. and Aulacoseira sp and quality of food bolus is superior in lagoon.</p> Soumaila Konaté, Gopéyué Maurice YEO, Séverine Estelle Konan, Olivier Assoa ETCHIAN, Nahoua Issa OUATTARA, Yao Laurent ALLA, Célestin Mélécony BLE Copyright (c) 2023 Soumaila Konaté, Gopéyué Maurice YEO, Séverine Estelle Konan, Olivier Assoa ETCHIAN, Nahoua Issa OUATTARA, Yao Laurent ALLA, Célestin Mélécony BLE https://creativecommons.org/licenses/by-nc/4.0 https://www.ajouronline.com/index.php/AJAS/article/view/7134 Sat, 25 Mar 2023 00:00:00 +0000