Journal of Marine and Coastal Sciences <div id="journalDescription"> <p><strong>WELCOME</strong><br><strong>REVISTA CIENCIAS MARINAS Y COSTERAS (<em>REVMAR</em>)</strong></p> <p>ISSN electrónico: <strong>1659-407X</strong>. ISSN impreso: <strong>1659-455X</strong></p> <p>It is a biannual continuous publication whose purpose is to disseminate original works related to marine sciences through a digital, scientific, international and bilingual journal. To date it is indexed in: Redalyc, LATINDEX, DOAJ, ASFA, DIALNET, , PERIÓDICA, SHERPA/ROMERO, MIAR, DRJI and in the Emerging Source Citation Index (ESCI). PUBLISHING IN REVMAR IS FREE OF CHARGE.</p> <p><strong>Publishing entity</strong>: Universidad Nacional, Escuela de Ciencias Biológicas, Costa Rica.<br><strong>Periodicity</strong>: Each issue will be published from January 1 and July 1 with a continuous periodicity and a six-monthly closure.</p> <p><strong>Areas and Descriptors</strong>: The areas of the journal are all those related to marine sciences including marine biology, geology and ecology, oceanography, evolution, systematics and taxonomy of marine organisms, pollution, fisheries, mariculture, marine biotechnology, conservation and integrated management of marine and coastal resources.</p> <p><strong>Contact e-mail</strong>:</p> </div> Universidad Nacional, Costa Rica. en-US Journal of Marine and Coastal Sciences 1659-455X <p>&nbsp;</p> <p><strong>General terms and conditions</strong></p> <p><img style="border-width: 0;" src="" alt="Creative Commons License"></p> <p><a href="/revmar%20">Revista Ciencias Marinas y Costeras</a> by <a href="">Universidad Nacional</a> is located under a <a href="">Licencia Creative Commons Atribución-NoComercial-SinDerivadas 3.0 Costa Rica.</a></p> <p>The journal is hosted in open-access repositories such as the <a href="" target="_blank" rel="noopener">Repositorio Institucional de la Universidad Nacional</a>, the <a title="kimuk" href="ítica%20de autoarchivo: La revista permite el auto archivo de los artículos en su versión arbitrada, editada y aprobada por el Consejo Editorial de la Revista para que sean disponibles en Acceso Abierto a través de Internet. Más información en el siguiente link: Condiciones generales La revista se aloja en repositorios de acceso abierto como el Repositorio Institucional de la Universidad Nacional, el Repositorio Kimuk de Costa Rica y la Referencia." target="_blank" rel="noopener">Repositorio Kimuk de Costa Rica</a> and <a href="" target="_blank" rel="noopener">la Referencia</a>.</p> <p class="revision" style="text-align: justify;">The editorial source of the journal must be acknowledged. For this purpose, use the doi identifier of the publication.</p> <p><strong>Self-archiving policy:</strong> The journal allows the self-archiving of articles in their refereed version, edited and approved by the Editorial Board of the Journal so that they are available in Open Access through the Internet. More information at the following link:&nbsp;<a href=""></a></p> Relationships between the environment and structure of the fish community in nycthemeral cycles in the Mecoacán lagoon, Tabasco, Mexico <p>The Mecoacán lagoon is an ecosystem used as a breeding area, a refuge, and a feeding and growth area by different species, particularly mollusks, crustaceans, and fish. The objective of this study is to compare the relationships between the environment and the structure of the fish community between two nycthemeral cycles, at a site near the mouth connecting a lagoon with the sea. Two sampling campaigns were carried out during June and October 2019, recording environmental variables and collecting samples of ichthyofauna with a gillnet. Abundance was determined in terms of number of individuals, biomass, and average weight, as well as heterogeneity, species diversity, and evenness indices. Dominant species were identified, ecological associations were analyzed and the correlations between abundance and environmental variables were determined. The average temperature was 29.6 °C, average salinity was 30.46 units, average dissolved oxygen was 2.28 mg/l and average pH was 7.46. In total, 16 species of fish were identified, among which the abundance of <em>Diapterusrhombeus </em>stands out. In June 13 species belonging to 12 genera and 11 families were reported, while in October 10 species were captured, belonging to 9 genera and 8 families. Eleven (11) dominant species were identified that can be classified into four groups which show differential correlations with environmental variables. Given the various anthropogenic pressures operating in the lagoon, it is important to integrate information on the environment and the structure of biotic communities as a basis for evaluating their degree of disturbance.</p> Luis Amado Ayala-Pérez Iliana Lizeth Castillo-Adame Alfonso Esquivel- Herrera Nayelli Estrada-Hidalgo Jennifer Pamela Jardon-Romero Itzel Jiménez-Obregón Eduardo André Rodríguez-Ayala ##submission.copyrightStatement## 2022-03-23 2022-03-23 9 29 10.15359/revmar.14-1.1 The March 4, 2021 Kermadec Islands tsunami: records, numerical modeling and warnings in Costa Rica <p>On March 4, 2021 a Mw=8.1 earthquake at the Tonga-Kermadec Trench generated a tsunami threat warning from the Pacific Tsunami Warning Center (PTWC).&nbsp; Costa Rica’s National Tsunami Monitoring System (Sinamot), acting as the National Tsunami Warning Center (NTWC), issued a warning about the possibility of a tsunami. The travel time&nbsp; of approximately 15 hours allowed the use of tsunami (flooding) numerical modeling as an additional decision support tool. The modeled tsunami heights agreed well with the records from two Costa Rican tide gauges. The tsunami reached a maximum height of 17.6 cm at Quepos (Pez Vela Marina) and 6.1 cm at the Chattam Bay tide gauge at Cocos Island, which was the first tsunami recorded at this gauge since its deployment in March 2018. At Wafer Bay on Cocos Island witnesses filmed the tsunami running upriver and reported strong currents which were not predicted by the model. The contrast between these effects and the small height recorded at the nearby gauge, together with the effects of previous tsunamis, such as the one that occurred in Japan in 2011, confirmed a local effect at Wafer Bay.&nbsp; For the rest of the country the PTWC forecast overestimated the tsunami heights that were actually recorded, which in turn agreed with the first threat analysis carried out by the Sinamot.</p> Hernán Porras-Espinoza Silvia Chacón-Barrantes Anthony Murillo-Gutierrez Fabio Rivera-Cerdas ##submission.copyrightStatement## 2022-03-23 2022-03-23 31 49 10.15359/revmar.14-1.2 Structure and associated flora of the Mata de Limón mangrove forest Puntarenas, Costa Rica <p>Mangrove forests can be negatively affected by different factors, and variations in these factors can cause physiological stress. The objective of this investigation was to describe the state of the vegetation structure and associated flora of the Mata de Limón mangrove forest. In the year 2014, six plots were established and measurements were carried out in each plot to determine the number of trees, heights, diameters at breast height and species of mangrove to calculate indicators of complexity and importance. Six of the seven nuclear species of Costa Rican mangrove forests were found. The general complexity index was 4.97, and <em>Avicennia germinans</em> had the highest importance value, being present in five of the six plots. In addition, 26 species of associated vegetation were identified, distributed in 17 families. Presence of mangrove forests is determined by the natural dynamics of diverse factors in an ecosystem, but human activities can alter its. The mangrove forest of Mata de Limón has been affected by factors such as the construction of train tracks, roads and the Caldera seaport; its vegetative composition is therefore heterogeneous, with the areas farthest from human interaction displaying greater complexity and a higher presence of floral species typically present in mangrove ecosystems.</p> Yixlen Guzmán-Sánchez Gustavo Rojas-Ortega Esteban Esquivel-Martín Ana Lucía Arrieta-Sancho José Andrés Vargas-Solano Luis Villalobos-Chacón ##submission.copyrightStatement## 2022-03-23 2022-03-23 51 64 10.15359/revmar.14-1.3 First record of the marine fish Taractichthys steindachneri (Perciformes, Bramidae) in El Salvador <p>The fish <em>Taractichthys steindachneri</em> is distributed throughout the Indo-Pacific Ocean, while in the Eastern Pacific Ocean it is restricted to the southern Gulf of California, in Mexico. However, in November of the year 2020, its presence was recorded for the first time in bycatch of artisanal fishery off the coast of El Salvador. This may be due to the cooling of marine surface waters caused by the La Niña phenomenon.</p> Andrea Fortis-Benavides José Alberto González-Leiva ##submission.copyrightStatement## 2022-03-23 2022-03-23 65 72 10.15359/revmar.14-1.4