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Struktur Komunitas Makroalga Di Daerah Intertidal Pantai Berbatu Desa Otan, Kecamatan Semau Kabupaten Kupang Provinsi Nusa Tenggara Timur Supit, Rockie R.L.; Emola, Imanuel Jacob; Ginzel, Fanny Iriany
Journal of Marine Research Vol 13, No 3 (2024): Journal of Marine Research
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jmr.v13i3.43836

Substrat sebagai habitat sangat menentukan komunitas di daerah intertidal. Oleh karena itu keberadaan substrat sangat berpengaruh terhadap komunitas makroalga. Daerah intertidal berbatu adalah daerah yang cukup ekstrem karena memiliki substrat keras dengan kondisi gelombang pasang surutnya besar. Kondisi tersebut akan mempengaruhi karakteristik setiap makroalga yang hidup di Pantai berbatu. Penelitian ini bertujuan untuk mendeskripsikan struktur komunitas makroalga di daerah intertidal pantai berbatu Desa Otan. Metode penelitian yang digunakan adalah metode survei, penentuan lokasi dengan teknik purposive sampling. Stasiun pengamatan sebanyak 3 stasiun, setiap stasiun terdiri dari 3 garis transek dan setiap garis transek diletakkan 10 plot berukuran 1 m x 1 m. Hasil penelitian menunjukkan bahwa komposisi jenis makroalga di daerah intertidal pantai berbatu Desa Otan terdiri dari divisi yaitu Chlorophyta sebanyak 18 spesies, Phaeophyta sebanyak 5 spesies dan Rhodophyta sebanyak 10 spesies. Makroalga yang banyak ditemukan adalah spesies Caulerpa lentilifera (21,80%), Avrainvillea sp (20,71%), dan Enteromorpha compressa (20,01%); Padina antillarum (43,26%), Sargassum polycystum (38,13%) dan Laurencia papilosa (33,02%). Secara keseluruhan komposisi jenis makroalga didominasi oleh alga hijau (Chlorophyta). Kepadatan tertinggi makroalga adalah alga hijau (Chlorophyta) pada ketiga stasiun pengamatan dengan kisaran nilai antara 0,532-1,526 ind/m². Frekuensi kehadiran tertinggi adalah Enteromorpha compressa berkisar antara 0,57-0,77 atau 57-77%; Padina antillarum dengan kisaran nilai 0,73-0,83 atau 73-83%; dan Laurencia papilosa sebesar 0,33-0,63 atau 33-63%. Indeks keanekaragam sebesar 1,07-1,13 dengan kategori sedang, nilai indeks keseragaman sebesar 0,73-0,83 dengan kategori sedang dan tinggi, nilai indeks dominansi sebesar 0,10-0,12 dengan kategori rendah. Habitat as a substrate determines the community in the intertidal area. Therefore, the presence of substrate greatly affects the macroalgae community. The intertidal of rocky beach is a fairly extreme area because it has a hard substrate with large tidal wave conditions. These conditions will affect the characteristics of each macroalgae that live in the rocky beach. This study aims to describe the structure of the macroalgae community in the intertidal rocky beach of Otan Village. The research method is a survey method, determining the location with purposive sampling technique. The observation location was determined as 3 stations, each station consists of 3 transect lines and each transect line is placed 10 plots measuring 1 m x 1 m. Data processing used Microsoft Excel software traps. Data processing using Microsoft Excel software. The results showed that the composition of macroalgae species in the intertidal rocky coast of Otan Village consisted of 18 species of Chlorophyta, 5 species of Phaeophyta and 10 species of Rhodophyta. Many macroalgae found were Caulerpa lentilifera (21.80%), Avrainvillea sp (20.71%), and Enteromorpha compressa (20.01%); Padina antillarum (43.26%), Sargassum polycystum (38.13%) and Laurencia papilosa (33.02%). Overall, the composition of macroalgae species is dominated by green algae (Chlorophyta). The highest density of macroalgae was green algae (Chlorophyta) at all three observation stations with a range of values between 0.532-1.526 ind/m². The highest frequency of presence was Enteromorpha compressa ranging from 0.57-0.77 or 57-77%; Padina antillarum with a value range of 0.73-0.83 or 73-83%; and Laurencia papilosa of 0.33-0.63 or 33-63%. Diversity index of 1.07-1.13 with moderate category, uniformity index value of 0.73-0.83 with moderate and high category, dominance index value of 0.10-0.12 with low category.

Biologi Reproduksi Ikan Selar Kuning (Selaroides leptolepis Cuvier, 1833) Di Tempat Pendaratan Ikan Kelurahan Oeba Kota Kupang Ginzel, Fanny Iriany; Kase, Alfred G.O
Journal of Marine Research Vol 13, No 2 (2024): Journal of Marine Research
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jmr.v13i2.42798

Tempat Pendaratan Ikan (TPI) Oeba merupakan salah satu fasilitas atau tempat terjadinya transaksi penjualan hasil tangkapan ikan di Kota Kupang. Hasil tangkapan nelayan didaratkan di TPI Oeba beraneka ragam jenis terdiri dari ikan pelagis kecil dan besar, ikan demersal serta hasil laut lainnya. Ikan selar kuning (Selaroides keptolepis Cuvier, 1833) merupakan salah satu jenis ikan pelagis kecil hasil tangkapan nelayan yang didaratkan di TPI Oeba Kota Kupang. Jenis ikan ini termasuk ikan ekonomis penting yang sangat diminati oleh masyarakat di Kota Kupang. Penangkapan ikan selar kuning (Selaroides keptolepis Cuvier, 1833) terjadi selama musim tangkap di sekitar pesisir pantai. Adanya penangkapan secara terus menerus kemungkinan akan berpengaruh terhadap beberapa aspek biologi reproduksi seperti ukuran dan sebaran panjang, tingkat kematangan gonad, indeks kematangan gonad dan faktor kondisi. Tujuan penelitian ini adalah mendeskripsikan aspek biologi reproduksi ikan selar kuning (Selaroides keptolepis Cuvier, 1833) yang didaratkan di TPI Oeba Kota Kupang. Metode penelitian yang digunakan adalah survei pasar, dengan teknik pengambilan data dilakukan secara random sampling. Waktu penelitian dilakukan selama bulan Oktober-November. Berdasarkan analisis hubungan panjang berat, maka pola pertumbuhan ikan selar kuning (Selaroides keptolepis Cuvier, 1833) yang didaratkan di TPI Oeba bersifat allometric negatif dengan nilai b < 3. Sebaran ukuran panjang ikan selar kuning antara bulan Oktober dan November berbeda. Hasil pengamatan visual terhadap tingkat kematangan gonad terdiri dari TKG I, II dan III. Indeks kematangan gonad tertinggi pada TKG III yaitu 0,967 (ikan jantan) dan 1,012 (ikan betina). Nilai faktor kondisi ikan selar bulan Oktober-November sebesar 1. Oeba Fish Landing Site (TPI) is one of the facilities or places where fish catch sales transactions occur in Kupang City. Fishermen's catches are landed at TPI Oeba in various types consisting of small and large pelagic fish, demersal fish and other marine products. Yellowstip shad (Selaroides leptolepis Cuvier, 1833) is one of the small pelagic fish caught by fishermen landed at Oeba TPI in Kupang City. This fish species is an economically important fish that is highly demanded by the people in Kupang City. Catching yellowstrip shad (Selaroides leptolepis Cuvier, 1833) occurs during the fishing season around the coast. The existence of continuous fishing is likely to affect several aspects of reproductive biology such as size and length distribution, gonad maturity level, gonad maturity index and condition factors. The purpose of this study is to describe the reproductive biology aspects of yellowstrip shad (Selaroides leptolepis Cuvier, 1833) landed at TPI Oeba, Kupang City. The research method used was a market survey, with data collection techniques carried out by random sampling. The research time was conducted during October-November. Based on length-weight relationship analysis, the growth pattern of yellowstrip shad (Selaroides keptolepis Cuvier, 1833) landed at Oeba TPI is negative allometric with the value of b < 3. Length distribution of yellwstrip shad between October and November is different. Visual observation of gonad maturity level consisted of TKG I, II and III. The highest gonad maturity index in TKG III is 0.967 (male) and 1.012 (female). The value of the condition factor of yellowstrip shad in October-November was 1.

Unveiling the DNA Barcoding of Threadfin Breams (Nemipteridae) at Oeba Fish Landing Site and Oesapa Fish Market in Kupang, East Nusa Tenggara Wora, Umbu Domu; Wijayanti, Diah Permata; Widowati, Ita; Ginzel, Fanny Iriany; Nursalim, Nining; Kholilah, Nenik; Bachtiar, Muggi
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 29, No 2 (2024): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ik.ijms.29.2.170-180

Threadfin breams (Nemipteridae) are demersal fish species that constitute a significant catch for East Nusa Tenggara fishermen at the Oeba Fish Landing Site and Oesapa Fish Market, where they are landed year-round. Over the years, there has been a noticeable increase in the capture of threadfin breams, raising concerns about the potential impact on their genetic diversity. The ongoing trend could affect the region’s overall population structure of threadfin breams. This study addresses the need to identify threadfin breams in the landing above sites of threadfin breams through molecular analysis of mtDNA COI. The research involved the examination of 24 samples obtained from the Oeba Fish Landing Site and Oesapa Fish Market. The analysis revealed the presence of five distinct threadfin bream species: Nemipterus hexodon, N. japonicus, N. zysron, N. aurora, and Pristipomoides typus. The genetic distance between individual threadfin breams ranged from 0-0.8%, indicating a relatively close genetic relationship within the population. Also, phylogenetic tree reconstruction further delineated five distinct clades based on the species obtained from the samples. Given these findings, the study emphasizes the importance of sustainable threadfin bream capture to preserve genetic diversity. The results underscore the need for ongoing monitoring and management strategies to ensure the threadfin bream population’s long-term health and stability. Additionally, the study suggests that a more in-depth analysis of genetic diversity and the environmental factors influencing this species is warranted for a comprehensive understanding and effective conservation measures.

Kelimpahan, Pola Distribusi Dan Keanekaragaman Echinodermata Di Ekosistem Lamun Pantai Namoanak Tablolong Batubao, Kecamatan Kupang Barat, Kabupaten Kupang, Nusa Tenggara Timur Merryanto, Yohanes; Ginzel, Fanny Iriany; Daud, Yanti
Jurnal Kelautan Tropis Vol 27, No 3 (2024): JURNAL KELAUTAN TROPIS
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jkt.v27i3.24250

Echinodermata is one of the associated biota that has an important role in seagrass ecosystems. If one of the 5 classes of the Echinodermata Phylum experiences physical, chemical, biological and anthropogenic impacts or pressures, then the population and environmental equilibrium becomes unbalanced. It is known that seagrass and Echinodermata ecosystems have a very beneficial reciprocal relationship. Namoanak Tablolong-Batubao Beach in West Kupang Sub-district, Kupang Regency is one of the coastal areas located on the western tip of Timor Island that has a multi-species seagrass ecosystem (6-7 species), which is inhabited by various biota. Information on the abundance, distribution patterns and diversity of Echinodermata in seagrass ecosystems on these beaches already exists, but the current conditions with the presence of various impacts such as tropical cyclones, land clearing for seaweed cultivation and high community activities are still very minimal. The purpose of this study was to analyze the abundance, distribution pattern and diversity of Echinodermata in seagrass ecosystem of Namoanak Tablolong-Batubao beach, West Kupang District, Kupang Regency. The sampling method used line transect and quadrat. The results showed that the Echinodermata Filum found included Astreoidea Class with 3 families and 3 species, Echinoidea Class with 5 families and 11 species, and Holothuroidea Class with 2 families and 4 species. The highest species abundance of the Echinodermata phylum is Protoreaste nodosus (Asteroidea) at Station 1-2 and Diadema setosum (Echinoidea) at Station 3-4. The distribution pattern at the four stations is categorized as uniform distribution. The diversity index value of the Echinodermata Filum at each station has moderate diversity. Echinodermata merupakan salah satu biota asosiasi yang mempunyai peran penting dalam ekosistem lamun. Apabila salah satu dari 5 kelas Filum Echinodermata mengalami dampak atau tekanan baik fisik, kimia, biologi dan antropogeneik, maka kesetimbangan populasi dan lingkungan menjadi tidak setimbang. Diketahui bahwa ekosistem lamun dan Echinodermata memiliki hubungan timbal balik yang sangat menuntungkan. Pantai Namoanak Tablolong-Batubao di Kecamatan Kupang Barat Kabupaten Kupang merupakan salah satu wilayah pesiisir pantai yang terletak di ujung barat Pulau Timor yang memiliki ekosistem lamun multispesies (6-7 spesies), dimana dihuni oleh berbagai biota. Informasi tentang kelimpahan, pola distribusi dan keanekaragaman Echinodermata di ekosistem lamun pada pantai tersebut sudah ada, namun kondisi saat ini dengan hadirnya berbagai dampak seperti siklon tropis, pembukaan lahan untuk budidaya rumput laut dan aktivitas masyarakat yang tinggi masih sangat minim. Tujuan dari penelitian ini adalah menganalisis kelimpahan, pola sebaran dan keanekaragaman Echinodermata di ekosistem lamun pantai Namoanak Tablolong-Batubao, Kecamatan Kupang Barat, Kabupaten Kupang. Metode pengambilan sampel menggunakan transek garis dan kuadrat. Hasil penelitian menunjukkan bahwa Filum Echinodermata yang ditemukan antara lain Kelas Astreoidea ada 3 famili dan 3 spesies, Kelas Echinoidea sebanyak 5 famili dan 11 spesies, dan Kelas Holothuroidea sebanyak 2 famili dan 4 spesies. Kelimpahan jenis tertinggi Filum Echinodermata adalah Protoreaste nodosus (Asteroidea) pada Stasiun 1-2 dan Diadema setosum (Echinoidea) di Stasiun 3-4. Pola sebaran pada keempat stasiun dikategori sebagai sebaran seragam. Nilai indeks keanekaramagan Filum Echinodermata di setiap stasiun memiliki keanekaragaman sedang.

The Growth Pattern of Nyale Worm (Eunice, sp. Polychaeta) From Pahiwi Coastal, Sumba Island, Indonesia Njurumana, Steven Nggiku; Widianingsih, Widianingsih; Hartati, Retno; Ginzel, Fanny Iriany
Jurnal Kelautan Tropis Vol 28, No 1 (2025): JURNAL KELAUTAN TROPIS
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jkt.v28i1.24862

Nyale (Eunice sp) is a polychaeta worm that belongs to the Phylum Annelids. Nyale (Eunice sp) appeared only once on Pahiwi Beach, West Sumba. Its appearance is often associated with the traditions of te west Sumbanese people. Nyale’s growth pattern is not yet known, so this research aims to determine Nyale’s growth pattern. Nyale samples were taken in the morning before sunrise by hand picking at the location of Pahiwi Coastal Waters, West Sumba. Based on the analysis results, the growth pattern of the Nyale is negative allometric, with a value of b=1.05. the correlation value obtained from the relationship between length and weight is 0.68. this also shows that an increase in length and weight.

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