13 research outputs found

    KELIMPAHAN DAN KERAGAMAN JENIS IKAN FAMILI CHAETODONTIDAE BERDASARKAN KONDISI TUTUPAN KARANG HIDUP DI KEPULAUAN SPERMONDE SULAWESI SELATAN

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    The family Chaetodontidae known as butterfly fishes (kepe-kepe) is a species that associated with coral by consumes coral polyp as its feed. This study aimed to determine the abundance and fish diversity of Chaetodontidae and to look the relationship of fish Chaetodontidae abundance with live coral coverage at Spermonde Island. To determines the abundance and fish diversity of Chaetodontidae by using direct census, while to determine the condition of coral reel used line intercept transect (LIT) method. This study was conducted for 6 (six) station at Spermonde Island by collecting data on depth 4 – 6 m with 3 replicate in each station. Result of study found 5 genera and consist of 16 species fishes from family Chaetodontidae. The overall of Chaetodontidae found is 70 Ind/250 m2 with the largest abundance in Kapoposang island (46 Ind/250 m2) and the smallest is Karanrang island (1 Ind/250 m2). Percentage of live coral coverage on research station at Spermonde Island at “good” to “bad” categories highest coral coverage at Badi island (72.6%) and the lowest is Balanglompo island (5%). Fish diversity of Chaetodontidae is high at station that dominated by Acropora coral. Abundance and fish diversity of Chaetodontidae are no relationship significantly on the percentage of live coral coverage of research station at Spermonde Island.Keyword : Chaetodontidae, coral reef, Spermonde

    KELIMPAHAN Acanthaster planci DAN TUTUPAN KARANG HIDUP DI PERAIRAN PULAU SAPARUA, PROVINSI MALUKU

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    Achantaster planci atau Crown-of-thorns starfish merupakan hewan pemangsa karang yang secara langsung dapat menyebabkan degradasi pada ekosistem terumbu karang. Penelitian ini bertujuan untuk mengetahui kelimpahan dari A. planci dan kondisi karang di Pulau Saparua. Jumlah lokasi pengamatan sebanyak lima stasiun. Penelitian ini dilaksanakan pada November 2018 di Pulau Saparua, Kabupaten Maluku Tengah, Provinsi Maluku. Pengamatan tutupan karang hidup dan kelimpahan Achantaster planci dilakukan dengan menggunakan metode Line Intercept Transect (LIT), pengamatan Acanthaster planci menggunakan metode sabuk (Belt Transect) yang mengikuti garis LIT dengan panjang 70 meter dan lebar 2 meter sehingga luasan area pengamatan sebesar 140 m2. Hasil penelitian menunjukkan kondisi tutupan karang hidup tergolong kedalam kriteria sedang hingga sangat baik (26,5%-89,54%) dan terdapat sepuluh bentuk pertumbuhan yang ditemukan pada lokasi ini. Indeks mortalitas karang tertinggi pada Stasiun (Stn) 2, daerah dimana tidak ditemukan A. planci. Keberadaan A. planci hanya ditemukan pada Stn 1, Stn 4 dan Stn 5, dengan kelimpahan A. planci tertinggi ditemukan pada Stn 1 sebanyak 0,036 ind/m2. Bentuk pertumbuhan karang Acropora mendominasi hampir pada seluruh stasiun dan A. planci ditemukan pada stasiun yang memiliki tutupan karang hidup yang didominasi oleh bentuk pertumbuhan Acropora branching dan coral branching. Korelasi baik tutupan karang dan kelimpahan A. planci maupun karang mati dan A. planci tergolong cukup dan tidak signifikan. Achantaster planci or Crown-of-thorns starfish are coral predators that can directly cause degradation of coral reef ecosystems. This study aims to determine the abundance of A. planci, live coral cover on Saparua Island. The number of observation stations was five locations. This research was conducted in November 2018 on Saparua Island, Central Maluku Regency, Maluku Province. Observations of live coral cover and Achantaster planci abundance were carried out using the Line Intercept Transect (LIT) method, Acanthaster planci observations using the Belt Transect method which followed the LIT with a length of 70 meters and a width of 2 meters so that the area of   the observation area was 140 m2. The results showed the condition of live coral cover was classified as moderate to very good criteria (26.5% -89.54%) and there were ten of coral lifeforms found at this location. The highest coral mortality index was determined in St 2 areas where A. planci was not found. The presence of A. planci was only found in St 1, St 4 and St 5, where the highest abundance of A. planci was found in St 1 by 0.036 ind / m2. Acropora coral growth forms dominate almost all stations and A. planci is found in stations that have live coral cover dominated by Acropora branching and coral branching growth forms. Correlation of both coral cover and abundance of A. planci and dead coral and A. planci is classified as sufficient and not significant

    IDENTIFICATION OF FRESHWATER GOBY SPECIES FROM THE BIAK AND KOYOAN RIVERS, LUWUK BANGGAI, CENTRAL SULAWESI

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    Sulawesi is an island famous for its biodiversity, including many endemic species. In particular, Sulawesi has the highest number of gobies in the world, including species with potential as food and/or ornamental fishes. The exploration of freshwater ichthyofauna is important in the context of Indonesian and global biodiversity. This research aimed to identify gobies found in the Luwuk Banggai area of Central Sulawesi, as a contribution to the exploration of Indonesian ichthyofaunal biodiversity. Gobies were sampled from January to March 2019 in the Biak and Koyoan Rivers. The sampled fish were measured and identified based on morphological characteristics. A total of 52 specimens were collected, and identified as belonging to 17 species within two families, the Gobiidae and Eleotridae. Gobies from the Koyoan River comprised 32 specimens from 8 species, while 20 specimens belonging to species were found in the Biak River. Only two species were found in both rivers: Stiphodon semoni and Sicyopterus lagocephalus. These results augment the body of knowledge regarding the presence and distribution of gobies in Indonesi

    Hubungan Panjang-Bobot dan Faktor Kondisi Ikan Sicyopus zosterophorum (Bleeker, 1856) di Sungai Bohi, Kabupaten Banggai, Sulawesi Tengah

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    Sicyopus zosterophorum merupakan salah satu spesies dari famili Gobiidae yang diketahui bermigrasi secara amphidromous, sehingga disebut sebagai amphidromous goby. Penelitian ini bertujuan untuk mengetahui hubungan panjang bobot dan faktor kondisi pada ikan S. zosterophorum. Penelitian ini dilaksanakan pada bulan Desember 2019 hingga Januari 2020, sampel ikan dikoleksi dari Sungai Bohi, Kabupaten Banggai, Sulawesi Tengah. Hasil analisis hubungan panjang bobot ikan S. zosterophorum pada ikan jantan mempunyai model hubungan panjang bobot adalah W = 0.00005L2.607 sedangkan untuk ikan betina adalah W = 0.003L1.546. Hubungan panjang bobot menunjukkan nilai korelasi yang sangat kuat untuk ikan jantan (r = 0.91) dan ikan betina yaitu sedang (r = 0.49). Berdasarkan hasil uji t terhadap nilai koefisien pertumbuhan (b) untuk ikan jantan maupun ikan betina menunjukkan tipe pertumbuhan allometrik negatif dimana thitung >ttabel yang berarti pertambahan panjang lebih cepat dari pada pertambahan bobot tubuh ikan. Nilai b yang rendah (b = 1.55) pada ikan betina menunjukkan ikan betina memiliki tubuh yang agak kurus dibandingkan dengan ikan jantan (b = 2.61). Kisaran faktor kondisi S. zosterophorum betina adalah 0.64 – 1.43 dan jantan yaitu 0.76 – 1.41. Variasi nilai faktor kondisi dipengaruhi oleh makanan, umur dan waktu matang gonad.Kata kunci: Sicyopus zosterophorum, hubungan panjang bobot, faktor kondisi, Sulawesi Tengah

    Diversity studies of freshwater goby species from three rivers ecosystem in Luwuk Banggai, Central Sulawesi, Indonesia

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    Inland public water areas which include freshwater lakes and several rivers in Sulawesi Island have native and endemic fish species which potential as ornamental fish. One of them is a member of Gobiidae. Several studies have reported the species of freshwater goby in Central Sulawesi Province. However, the information is still lacking, especially in the Luwuk Banggai, Central Sulawesi. Therefore, research is needed to examine the diversity of gobies in this area. Observations were conducted in three rivers (Salodik, Kintom, and Simpong). The results of fish inventory in the three Luwuk Banggai rivers obtained 131 fish specimens, namely 26 specimens from the Salodik river, 29 specimens from the Kintom river, and 76 specimens from the Simpong river. The Simpong River has the highest Shannon- Wiener index (H’) followed by the Kintom and Salodik rivers, which are 2.6313, 2.0114, and 1.3656, respectively. Similarity analysis of the three rivers produced 2 clusters. The Salodik River in fish diversity shows differences with the other two rivers, while the Simpong and Kintom rivers are in one cluster. Further research is needed related to the biodiversity of gobie

    Additional records of Sicyopus discordipinnis (Watson, 1995) (Oxudercidae: Sicydiinae) in Central Sulawesi, Indonesia

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    International audienceSicyopus discordipinnis, of the subfamily Sicydiinae (Oxudercidae), was first described from Papua New Guinea and it was found more recently in Papua, Indonesia, Solomon, Australia and also on the Sahul Shelf. During research on the riverine ichthyofauna of Sulawesi Island S. discordipinnis was found in four rivers in Banggai Regency, Central Sulawesi Province. These records extend to the west its occurence and confirm its widespread distribution to Wallacea. This Data Deficient (DD) species may be quite widespread but locally rare and potentially at risk of extirpation

    A new species of Schismatogobius (Teleostei: Gobiidae) from Sulawesi (Indonesia)

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    International audienceA new species of Schismatogobius, a freshwater goby, is described from Sulawesi (Indonesia). Itdiffers from other species belonging to the genus by a high percentage of genetic divergence in partial COI gene(652 bp) and by several characters, including the number of pectoral fin rays, the pectoral fin colour pattern, thejaw length/head length ratio and the preanal length

    Barcoding de deux morphotypes de post-larves de gobies amphidromes (penja) de la riviÚre Mandar, Sulawesi occidental, Indonésie

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    International audiencePost-larvae of amphidromous gobies, locally known as ‘penja’ in Sulawesi, is a group of fish that are often caught by fishermen as consumption fish when migrating and has a life-cycle which begins with adults spawning in the river, the eggs and embryos are then carried by river currents, hatching before arriving at the sea, and spend their larval and postlarval phases in the sea, before returning to the river to grow and eventually reproduce. Belonging to several species, they often school together and are difficult to identify with certainty based on morphological characters. Molecular biology tools such as DNA barcoding can help overcome this challenge. This study, conducted from June 2018 to December 2019, aimed at identifying ‘penja’ post-larvae migrating upstream in the Mandar River in West Sulawesi (Indonesia) using a molecular approach. Two species were identified: the threadfin goby Sicyopterus longifilis de Beaufort, 1912, locally known as ‘penja mawassar’, and the blue neon goby Stiphodon semoni Weber, 1895, local name ‘penja alus’. Both are widespread species. Main characteristics of these species and of their fisheries are given. The determination of harvested postlarvae is a major issue for fishery management.Les post-larves des gobies amphidromes connus localement Ă  Sulawesi sous le nom de ‘penja’, appartiennent Ă  plusieurs espĂšces ; elles se regroupent souvent et sont difficiles Ă  identifier avec certitude sur la base des seuls caractĂšres morphologiques. Des outils de biologie molĂ©culaire, tels que le code-barre ADN, peuvent aider Ă  surmonter cette difficultĂ©. Cette Ă©tude, menĂ©e de juin 2018 Ă  dĂ©cembre 2019, visait Ă  identifier les post-larves de ‘penja’ migrant en amont dans la riviĂšre Mandar en Sulawesi occidental (IndonĂ©sie) en utilisant une approche molĂ©culaire. Deux espĂšces ont Ă©tĂ© identifiĂ©es : le sicyoptĂšre filamenteux, Sicyopterus longifilis de Beaufort, 1912, connu localement sous le nom de ‘penja mawassar’, et le Stiphodon de Semon, Stiphodon semoni Weber, 1895, nom local ‘penja alus’. Tous deux sont des espĂšces Ă  large rĂ©partition gĂ©ographique. Les principales caractĂ©ristiques de ces espĂšces ainsi que des informations sur les pĂȘcheries sont documentĂ©es. La dĂ©termination des post-larves pĂȘchĂ©es est un enjeu majeur pour la gestion des pĂȘcherie

    First record of Stiphodon annieae Keith & Hadiaty, 2015 (Teleostei, Oxudercidae) from Sulawesi Island, Indonesia

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    The recently described Stiphodon annieae (Keith & Hadiaty, 2015) was thought to be endemic to Halmahera Island, Indonesia. However, from August 2019 to January 2020, we collected several specimens during field trips to the Soho, Simpong, and Uso rivers in Luwuk Banggai, Central Sulawesi, Indonesia. We describe specimens collected in the Soho River and discuss the ichthyofauna of Luwuk Banggai. This is the first report of S. annieae from Sulawesi. Our records represent a range extension of approximately 500–600 km west of this species’ type locality on the island of Halmahera.

    Preliminary note on the morphological characters of penja (amphidromous goby postlarvae) in West Sulawesi and Gorontalo Bay

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    International audiencePenja is the local name for the postlarvae of fish belonging to the Gobioidei, whose appearance at certain times is an amphidromous migration process from the sea to rivers. This group of fish is generally referred to as amphidromous gobies. This study aimed to reveal some facts related to the species diversity of penja based on morphological characteristics. The study was conducted from October 2017 to March 2019 in West Sulawesi and Gorontalo Bay, Indonesia. Amphidromous goby samples at the penja (postlarval) stage were obtained from fishermen's catches and from traditional markets in each location. The samples obtained were measured and described based on morphological differences. The total length of the sampled penja ranged from 18 mm to 58 mm. All penja were identified as belonging to one of two families, the Gobiidae and Eleotridae. Although the species obtained from the waters of West Sulawesi and Gorontalo Bay were similar, there were variations in species composition (relative abundance) based on observed morphology of penja postlarvae from these two locations
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