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Hubungan Panjang Berat dan Faktor Kondisi Siput Lola (Rochia nilotica) di Perairan Maluku, Sumbawa, dan Bengkulu Risnita Tri Utami; Putri Sapira Ibrahim; Agus Kusnadi; Dedy Kurnianto; Teddy Triandiza; Rosmi N Pesillette
Jurnal Kelautan Tropis Vol 25, No 3 (2022): JURNAL KELAUTAN TROPIS
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jkt.v25i3.14089

Abstract

Rochia nilotica (Tegulidae) is a snail that is highly important economically due to its nacre layer on their shells. Lola shells are used as raw material in nail polish and high quality pearl buttons. Recently, the production of Rochia nilotica has drastically decreased. This study aimed to investigate the relationship on length-weight and condition factors of Rochia snails from four sites. Data collection was gathered on may-September 2021 at four sites i.e Kei Island, Morellla (Central Maluku), Sumbawa Island and Enggano Island with purposive sampling method. A total 177 individuals have been collected with a detail of 35 individuals from Kei Island, 61 Individuals from Central Maluku, 51 and 29 individuals from Sumbawa Island and Enggano island respectively.  The result showed that the relationship on length-weight of Rochia snails at Enggano Island, Sumbawa Island, central Maluku and Kei Island was  W=0,00707L2,2804, 0,00686L2,3949, 0,00308L2,5478,dan 0,00025L3,0893 respectively. The result shows that the growth pattern at Bengkulu, Sumbawa, and Morella follows a negative allometric model, while those at Kei Islands follow a positive allometric. Condition factors were relatively varied 1,0020-1,0317 suggested that the research waters were still a suitable environment for the growth of top shells.   Siput lola Rochia nilotica (Tegulidae) merupakan komoditi niaga bernilai ekonomis tinggi karena cangkangnya yang memiliki lapisan mutiara. Cangkang siput lola digunakan sebagai bahan baku industri cat kuku dan kancing yang berkualitas tinggi. Akibat eksploitasi berlebihan, produksi siput lola mengalami penurunan drastis selama beberapa tahun terakhir. Penelitian ini bertujuan untuk menentukan hubungan panjang berat dan faktor kondisi dari siput lola di 4 lokasi penelitian yang dipilih. Pengambilan data dilakukan pada bulan April-September 2021 dengan menggunakan metode Purposive Sampling yang dilakukan di 4 lokasi yaitu Kepulauan Kei, Morella, Pulau Sumbawa, dan Pulau Enggano yang mewakili 3 wilayah (Timur, Tengah dan Barat) Perairan Indonesia. Siput Lola yang diperoleh sebanyak 177 individu yang berasal dari 35 individu dari Kepulauan Kei, 61 individu Morella, 51 individu Sumbawa, dan 29 individu Enggano. Hubungan panjang berat siput lola di lokasi penelitian Enggano, Sumbawa, Morella, dan Kepulauan Kei secara berurutan yaitu sebesar W=0,00707L2,2804, 0,00686L2,3949, 0,00308L2,5478,dan 0,00025L3,0893. Hasil penelitian ini menunjukkan bahwa pola pertumbuhan siput lola di Pulau Enggano, Sumbawa dan Morella mengikuti model allometrik negatif, sedangkan pola pertumbuhan siput lola di Kepulauan Kei mengikuti model allometrik positif. Faktor kondisi relatif beragam dari 1,0020-1,0317 yang mengindikasikan bahwa daerah perairan penelitian masih merupakan lingkungan yang sesuai untuk pertumbuhan siput lola.
Catatan Pertama Distribusi Tridacna noae (Röding, 1798) dari Perairan Kepulauan Kei, Maluku Teddy Triandiza; Udhi Eko Hernawan; Agus Kusnadi
Jurnal Kelautan Tropis Vol 26, No 3 (2023): JURNAL KELAUTAN TROPIS
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jkt.v26i3.18421

Abstract

The giant clams are the biggest  living bivalves that not only play a  vital role in coral reef ecosystem, but also as a food provider for coastal inhabitant. One of these species was Tridacna noae which is a crpyctic species due to morphoplogial characteristic similarity and habitat preferences with Tridacna maxima. Tridacna noae was recorded at the first time found in Kei Islands on November and December 2017 based on morphological characteristic and DNA barcoding analysis. This research found 8 individu of T. Noae in total, 7 individu was found in Kur Island and one individu from Ohoidertom at 2-3 m depth. The mantle pattern of T. noae was very unique and can be used to distinguished from T. maxima. Special feature of ormanent mantle of T. noae indicated with oval-shape patch with white line on the edge, has hyaline organ scattered along the margin of mantle and the presence of papillae that clearly seen. The result on Blasting from GenBank NCBI for COI sequence of giant clam sample revealed that 99.79%-100% was identical with T. noae species. Furthermore, result on genetic distance analysis of T. noae sample from Kei Island compare with T.noae from GenBank was 0.00-0.051, while genetic distance value compare with T. maxima was 0.159 – 0.205. The new finding of T. noae in Kei Island has added the number of giant clam species recorded previously become 7 species. This finding was also has enhanced the information on biogeographical distribution of T.noae in Indonesia.  Kerang kima merupakan kelompok bivalvia berukuran paling besar yang memlilki peranan penting di ekosistem terumbu karang serta menjadi sumber nutrisi bagi masyarakat peisir. Salah satu species kima adalah Tridacna noae yang bersifat cryptic spesies karena memiliki banyak kesamaan karakteristik morfologi dan preferensi habitat dengan T. Maxima. T. noae tercatat pertama kali ditemukan di Perairan Kepulauan Kei pada bulan November dan Desember 2017 berdasarkan pengamatan karekteristik morfologi dan aplikasi DNA barcoding. Hasil peneltian menemukan delapan individu T. noae, tujuh individu ditemukan di Perairan Pulau Kur, satu individu ditemukan di Perairan Ohoidertoom dengan kedalaman perairan 2-3 m. Ornamen mantel T. noae sangat khas dan dapat digunakan untuk membedakan dari T. maxima. Ornamen mantel ditandai dengan patch berbentuk oval terpisah dengan garis putih di tepi, memiliki organ hialin yang tersebar di sepanjang margin mantel, dan kehadiran papila yang terlihat jelas. Hasil blasting di GenBank NCBI untuk sekuens COI sampel kima menghasilkan tingkat kemiripan 99.79%-100% (identik) dengan T. noae. Hasil analisis jarak genetik sampel T. noae asal Kepulauan Kei dengan T. noae Genbank adalah sebesar 0.00 hingga 0.051, sedangkan jarak genetik dengan T. maxima adalah 0.159 hingga 0.205. Temuan T. noae di Kepulauan Kei menambahkan jenis kima yang tercatat sebelumnya di Kepulauan Kei menjadi 7 jenis. Temuan ini juga menambahkan lebih banyak informasi tentang distribusi geografis T. noae di Indonesia
STUDI KERAPATAN DAN PENUTUPAN JENIS LAMUN DI PERAIRAN ENGGANO, BENGKULU Risnita Tri Utami; Wica Elvina; Yulfiperius Yulfiperius; Ayub Sugara; Ari Anggoro; Teddy Triandiza; La Ode Abdul Fajar Hasidu
JURNAL AKUAKULTUR, TEKNOLOGI DAN MANAJEMEN PERIKANAN TANGKAP, ILMU KELAUTAN Vol 6 No 2 (2023): JOINT-FISH - Jurnal Akuakultur, Teknologi Dan Manajemen Perikanan Tangkap, Ilmu K
Publisher : Fakultas Perikanan dan Ilmu Kelautan Universitas Muslim Indonesia Makassar, Sulawesi Selatan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33096/joint-fish.v6i2.263

Abstract

Seagrass has an important role in coastal ecosystems. Seagrass is a primary producer and constituent of habitats and ecosystems that support life on coral reefs and mangroves or coastal land The distribution of seagrass in Indonesia is quite extensive, covering almost all water areas in Indonesia. Information regarding the distribution of seagrass in the waters of Enggano Island is still limited, so a study is needed to provide information regarding the distribution of seagrass in this area. This study aims to identify the types of seagrass and variations in their density and cover on Enggano Island, Bengkulu. This research was conducted in March 2022 in Kaana Village, Enggano, Bengkulu. Seagrass data collection method using purposive sampling method. Sampling was carried out at four stations, where each station was repeated three times. Seagrass was identified at the research location; its density and closure were calculated. Measurement of water quality is done in situ. The results of this study indicate that three species of seagrass were found, namely Enhalus acoroides, Cymodocea rotundata and Halodule uninervis. However, the types of C. rotundata and H. Uninervis were scattered in all research stations. The highest cover was found at station 1 with 86% cover while the lowest cover was found at station 3 with 16% cover. There are variations in composition and density at each research station, this shows that there is environmental influence and there is not an even distribution of seagrass in the area