Morphological characteristics and biodiversity of mudskipper fish (Periophthalmus: Gobiidae) in mangrove ecosystem of coastal Bay of Tomini, Boalemo, Gorontalo Province, Indonesia

Abstract

Abstract. Baderan DWK, Aydalina RV, Hamidun MS. 2023. Morphological characteristics and biodiversity of mudskipper fish (Periophthalmus: Gobiidae) in mangrove ecosystem of coastal Bay of Tomini, Gorontalo Province, Indonesia. Biodiversitas 24: 498-507. The southern sea area of Gorontalo Province is part of Tomini bay, the biggest bay in Indonesia. This area has a unique biodiversity and is Sulawesi endemic. The mangrove forest in the coastal bay of Tomini Boalemo is one of the habitats for flora and fauna, a place for spawning, nurturing, and food hunting for fish. The mudskipper is a fish that lives in the mangrove area. This study aims to reveal the morphological characteristics and biodiversity of mudskipper (Periophthalmus: Gobiidae) in the ecosystem of Tomini Boalemo coastal bay of Gorontalo Province. This study employed a quantitative descriptive that also implemented purposive sampling as the sampling method in three ecosystem stations of Tomini Boalemo coastal bay (Dulupi, Bajo, and East Pentadu mangrove). The mudskippers were collected manually when the water was receding using a fish net. The sample which had been collected were then identified based on 22 morphological, 24 morphometric, and seven meristic characteristics. The identification results were then compared with the identification key. The mudskippers' species were then analyzed to determine the species' biodiversity (diversity, evenness, species richness, and dominance indexes). The research result revealed five species from Periophthalmus Genus: Periophthalmus argentilineatus, Periophthalmus kalolo, Periophthalmus malaccensis, Periophthalmus minutus, Periophthalmus variabilis, with total individuals 561. The score of H?: 1.09 showed that the diversity of mudskipper fish was categorized as medium. The evenness index was 0.99 obtained from 3 observation stations, while the lowest dominance index was on station II with a score of 0.34, and the score of R1 in each station was respectively (0.19); (0.36); and (0.2). The results of this study could be used as a database for the sustainable management of Tomini Bay to tackle the threats of species extinction through aquatic life protection and preservation to arrange the natural balance and support the availability of the coastal resource for future generations.

Morphological characteristics of sex dimorphism in Gobiopterus sp. (Gobiiformes: Oxudercidae) from Ranu Grati Lake, Pasuruan District, East Java, Indonesia

“…Morphometric and meristics data were analyzed using the Microsoft Excel program version 2021, and morphological observations were analyzed descriptively. The data used Total length, Standard length, Head length, Caudal peduncle length, Snout length, Eye diameter, Caudal peduncle depth, Body depth, Pectoral fin length, Pelvic fin length, height of the longest first spiny dorsal fin, first dorsal fin base length, second dorsal fin base length, anal fin base length based on Baderan et al (2023). At the same time the gonad histology for both males and females was analyzed descriptively according to DoNascimento et al (2017).…”

“…, body depth, pectoral fin length, pelvic fin length, first longest height, spiny dorsal fin, first dorsal fin base length , length of base of second dorsal fin, length of base of anal fin, and weightaccording toBaderan et al (2023). (viii) Surgery activities, preparations, observing anatomy and morphology were carried out at the laboratory of Fish Reproduction, Faculty of Fisheries and Marine Sciences, Universitas Brawijaya, Malang, Indonesia.…”

Transcending borders: Remarkable genetic homogeneity among Barred mudskipper (Periophthalmus argentilineatus) populations in the southwestern Indian Ocean

“…Barred mudskipper Periophthalmus argentilineatus Valenciennes, 1837 (Osteichthyes: Oxudercinae) were chosen as a model species due to their widespread distribution in estuarine mangroves in the region and their strong affinity to mangroves (Heemstra et al., 2022). Their movements beyond these areas are usually confined to the immediate intertidal zones or adjacent areas (Baderan et al., 2023), rendering them highly vulnerable to alterations in the mangroves. Given vast expenses of mangroves in the region are reportedly been lost in previous years, there is a potential that their populations have been heavily impacted.…”

Identification of gelodok fish (Perciformes, Gobiidae) in a coastal mangrove ecosystem, based on morphological and molecular characteristics

“…Gobies are widely geographically distributed in the world, ranging from the Indo Pacific region to the Atlantic coast of Africa (Jaafar & Murdy, 2017). In Indonesia, gobies are found in the region of Sumatra (Maeda & Tan, 2013;Ridho et al, 2021;Harefa & Chen, 2022;Khairul & Lubis, 2022;Hernawati et al, 2023), Java (Arisuryanti et al, 2018;Ningsih & Santoso, 2020;Aji & Arisuryanti, 2021;Baihaqi et al, 2022;Febrianti et al, 2023), Maluku (Taniwel et al, 2020), Sulawesi (Gani et al, 2020(Gani et al, , 2021Bandjolu et al, 2021;Hasan et al, 2021;Astuti et al, 2022;Baderan et al, 2023;Zakiyah Darojat et al, 2023), Nusa Tenggara (Rhaifa et al, 2021), and Papua (Greenfield & Tornabene, 2014;Putra et al, 2022).…”