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Komposisi jenis dan struktur komunitas ikan yang bermigrasi melewati tangga ikan pada Bendung Perjaya, Sungai Komering, Sumatera Selatan Muhammad Nizar; Mohammad Mukhlis Kamal; Enan M Adiwilaga
Depik Vol 3, No 1 (2014): April 2014
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.3.1.1280

Abstrak. Penelitian ini bertujuan untuk mendeskripsikan komposisi spesies dan struktur komunitas ikan yang dapat bermigrasi melewati tangga ikan pada Bendung Perjaya, Sungai Komering, Sumatera Selatan. Penelitian dilaksanakan pada 2013 dengan tiga kali sampling yaitu pada Maret, Mei, dan Juli mengikuti musim. Pengambilan sampel ikan menggunakan alat tangkap yang tidak selektif, yaitu langgian (hand operated scoop net). Hasil penelitian didapatkan 5 famili yang meliputi 21 spesies, dengan jumlah spesies terbesar berasal dari famili Cyprinidae (15 spesies). Beberapa spesies yang dominan adalah Labeobarbus leptocheilus dan Crossocheilus sp. Kondisi musim berpengaruh terhadap struktur komunitas ikan, dimana keanekaragaman dan kemerataan cukup tinggi terjadi pada musim hujan (Maret) dan peralihan (Mei) tetapi rendah pada musim kemarau (Juli). Dominansi tinggi terjadi pada musim kemarau (Juli) tetapi rendah pada musim hujan (Maret) dan peralihan (Mei).Kata kunci: Tangga ikan; Bendung Perjaya; Migrasi ikan; Struktur komunitas ikan; Cyprinidae

Ratio of coral reefs to macroalgae: An ecosystem approach management Aditiyawan Ahmad; Achmad Fahrudin; Mennofatria Boer; Yusli Wardiatno; Mohammad Mukhlis Kamal
Depik Vol 8, No 2 (2019): August 2019
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.8.2.13422

Abstract. The decline in the quality of coral reef ecosystems is not only caused by human activities but also caused by competition in ecosystems, including competition for space and nutrients. Research on the comparison of coral reefs with macroalgae is one of the determinants of coral reef health which is the basis for the management of coral reefs with an ecosystem approach. The purpose of this study was to analyze the comparison of coral reef cover with macroalgae. The research method used is Line Intercept Transect (LIT), the research location is 13 stations divided into 3 locations, namely north, centre, and south from Ternate Island in North Maluku. The results showed that the condition of coral reefs ranged from 24 – 86.60%, based on the condition categories of 13 observation locations, the coral reefs of Ternate Island were in very good condition at 15.38%, good conditions at 46.16%, adequate conditions at 30.77%, and damaged conditions 7.69%, while the condition of macroalgae cover ranged from 0 - 30.60% in the area of coral reef ecosystems. The ratio of the of coral reefs to algae ranges from 0 to 1.117, based on the ratio value, it is classified as low, medium to high, spread in the coral reef ecosystem of Ternate Island. Coral reef management strategies on Ternate Island include a continuous monitoring program for coral reef ecosystems, education on coral reef ecosystems, creating a conscious community of waste, and limiting the capture and restoking of herbivorous fish in coral reef areas.Keywords: Coral reef, ecosystem approach management, macroalgae, Ternate Island

Keragaman ikan di Danau Cala, Kabupaten Musi Banyuasin Sumatera Selatan Jifi Abu Ammar; Mohammad Mukhlis Kamal; Sulistiono .
Depik Vol 3, No 3 (2014): Desember 2014
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.3.3.2147

The aim of his studi was to evaluate the fish fauna in Danau Cala in dry season, transition season, and the tide season. The survey was conducted 3 times on July 2013, October 2013 and January 2014 as representative of dry, transition and tide seasons. The fish sampling was conducted by gillnets and fish traps. A total of 35 fish species were recorded during the study; 23 species in dry season, it was dominated by tembakang fish (Helostoma temminckii) from family Helosmatidae, Sepat siam fish(Trichogaster pectoralis) from Belontiidae family, and snakehead fish (Channa striata) of Channidae family. A total of 16 species were recorded on transitional seasons where baung fish (Hemibagrus nemurus) of the family Bagridae, and seluang fish (Rasbora sp) of the family Cyprinidae were predominant. In addition, 15 fish species were recorded on tide season which was dominated by baung fish (Hemibagrus nemurus) and tendon fish (Mystus sabanus) of family Bagridae

The dynamics of target fishes resources in coral reef fisheries at coastal area of Ternate Island Faizal Rumagia; Mennofatria Boer; Rahmat Kurnia; Mohammad Mukhlis Kamal
Depik Vol 8, No 2 (2019): August 2019
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.8.2.13358

Abstract. As one of the coastal ecosystem, coral reef ecosystem is a magnificent marine ecosystem, where their species richness and composition play an important role for the ability of coral reef ecosystem to respond to the fishing activity and other stressors, where fishing has impacted the fish community, target or non-target reef fish species. The dynamic of reef fish resources, especially the target species, become one of the aspects that must be considered in the management and utilization of the fisheries resources in the coral reef ecosystem and their surrounding area. The purpose of the study was to analyze the dynamics of the target fish in the coral reef fishing activity at the coastal area of Ternate Island, from the growth, mortality and exploitation ratio aspect. The research was conduct from April to August 2018 in the coastal area of Ternate Island. The data sampling was growth parameters data through length and weight measurement. Total sample measure along the research time was 6245 sample (consist of seven family and 11 species). The result shows that the target fish have asymptotic length (L∞) range from 263.16–483.16 mm, with growth coefficient (K) ranging from 0.61–0.92 per year. The theoretic age at length 0 (t0) ranges from minus 0.0825–0.1669 year (equal to 30-61 day). The fishing mortality rate (F) is lower than the natural mortality rate (M), which resulting the exploitation rate (E) for the target fish mostly under 50%, which indicated that the utilization of the reef fishes in the coastal area of Ternate Island is still under-exploited.Keywords: Exploitation rate, Growth parameters, Length-weight relationship, Mortality rate, Stock assessment

EVALUASI KESESUAIAN TAMBAK BUDIDAYA UDANG VANAME DENGAN TINGKAT TEKNOLOGI BERBEDA DI PESISIR KABUPATEN LAMPUNG TIMUR, INDONESIA Darma Utama; Bambang Widigdo; Mohammad Mukhlis Kamal; Taryono Taryono
Jurnal Riset Akuakultur Vol 17, No 4 (2022): (Desember 2022)
Publisher : Politeknik Kelautan dan Perikanan Jembrana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/jra.17.4.2022.235-248

Pesisir Kabupaten Lampung Timur merupakan sentra budidaya udang vaname (Litopenaeus vannamei). Namun, daerah ini mengalami fluktuasi produksi, di mana produksi periode tahun 2019-2021 mengalami penurunan dari 10.504 ton menjadi 5.903 ton. Tujuan penelitian ini untuk mengevaluasi kesesuaian fisik lahan serta kualitas air dan tanah tambak pemeliharaan udang vaname yang diklasifikasikan ke dalam dua tingkat teknologi budidaya: tradisional dan semi-intensif atau intensif. Lokasi penelitian berada di pesisir Kabupaten Lampung Timur. Parameter yang diukur (1) kesesuaian fisik lahan meliputi ketinggian lahan, penggunaan lahan, jarak dari pantai, dan jarak dari sungai; (2) kualitas air terdiri dari suhu, salinitas, pH, oksigen terlarut, alkalinitas, amonia, nitrit, nitrat, serta fosfat; dan (3) kualitas tanah berupa pH dan jenis substrat sedimen. Tingkat kesesuaian fisik lahan dianalisis menggunakan sistem informasi geografis dengan metode tumpang susun (overlay) peta. Kesesuaian kualitas air dan tanah berpedoman pada Peraturan Menteri Kelautan dan Perikanan Nomor 75 Tahun 2016. Hasil evaluasi kesesuaian lahan untuk tambak tradisional menunjukkan 491,45 ha masuk kategori sangat sesuai (S1) dan sesuai (S2) serta 9.662,61 ha sesuai marjinal (S3). Untuk tambak semi-intensif atau intensif seluas 11,61 ha masuk kategori S1 dan S2 serta 10.416,58 ha kategori S3. Nilai hasil uji kualitas air dan tanah bervariasi di tiap titik pengujian, namun umumnya sesuai, hanya salinitas tambak semi-intensif atau intensif tercatat tidak sesuai standar budidaya udang vaname. Hasil penelitian menyimpulkan lokasi tambak di lahan S3 dan ketidaksesuaian salinitas menjadi faktor yang memengaruhi secara langsung keberhasilan budidaya dan stabilitas produksi udang.The coastal area of East Lampung Regency is one of the main centers for whiteleg shrimp (Litopenaeus vannamei) aquaculture in Lampung Province. However, the area’s shrimp production has highly fluctuated. For example, in 2019-2021, the production decreased from 10,504 tons to 5,903 tons. This study aimed to evaluate the land suitability, water and soil quality of shrimp ponds located in the coastal of East Lampung Regency which use two types of farming technology: traditional and semi-intensive or intensive. The measured parameters included: (1) physical suitability parameters: land height from sea level, land use, distance from the beach and river; (2) water quality parameters: temperature, salinity, pH, dissolved oxygen, alkalinity, ammonia, nitrite, nitrate, and phosphate; and (3) soil quality parameters: pH and types of sediment. The level of land suitability was determined using the geographic information system (GIS) approach, in which a weighted overlay method was employed. The suitability classification of water and soil quality was based on the standard in the Decree of the Minister of Marine Affairs and Fisheries Number 75/2016. The results showed that 491.45 ha was categorized as highly suitable (S1) and suitable (S2) and 9,662.61 ha as marginally suitable (S3) for traditional farming. For semi-intensive or intensive farming were located in the S1 and S2 of 11.61 ha and S3 category of 10,416.58 ha. Water and soil quality varied in each research site but generally still met the required standard, only the water salinity of the semi-intensive/intensive did not meet the required standards of whiteleg shrimp farming. The study concludes that the location of the ponds in S3 land and the inappropriate salinity directly affect the success and stable production of shrimp farming in the area.

DNA BARCODING UNTUK VALIDASI SPESIES PAUS SPERMA (Physeter macrocephalus LINNAEUS, 1758) DARI PERAIRAN LAUT SAWU, NUSA TENGGARA TIMUR, INDONESIA Agus Alim Hakim; Endah Sri Rahayu; Ali Mashar; Nurlisa Alias Butet; Yusli Wardiatno; Mohammad Mukhlis Kamal
Coastal and Ocean Journal (COJ) Vol 7 No 1 (2023): COJ (Coastal and Ocean Journal)
Publisher : Pusat Kajian Sumberdaya Pesisir dan Lautan IPB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/coj.v7i1.49702

The sperm whale (Physeter macrocephalus) is a protected marine biota in Indonesia. Molecular identification of sperm whales from the Sawu Sea (East Nusa Tenggara, Indonesia) was carried out using the 16S rRNA gene. This study aims to validate the species of the sperm whale (Physeter macrocephalus) in Indonesia using the partial cytochrome oxidase subunit I (COI) gene. The specimens used were tissue specimens from laboratory collections taken from Sawu Sea waters in 2014. The three samples were validated as Physeter microcephalus with 100% similarity. The base composition is dominated by the base thymine (31.7–31.8%) with a GC content of 42.7–42.8%. The genetic distance for the same species was 0.0015, while the highest genetic distance for Orcaella brevirostris was 0.2128. Molecular identification using the 16S rRNA gene and COI has validated the species of a sperm whale (Physeter macrocephalus) in Indonesia so that this genetic data can be used as a basis for sperm whale resource management and conservation.

Sirkulasi Laut dan Biogeokimia di Kawasan Teluk Cendrawasih Darmawan, Aldo; Atmadipoera, Agus Saleh; Nugroho, Dwiyoga; Kamal, Mohammad Mukhlis; Koch-Larrouy, Ariane
POSITRON Vol 11, No 2 (2021): Vol. 11 No. 2 Edition
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam, Univetsitas Tanjungpura

Teluk Cendrawasih (TC) merupakan salah satu teluk terbesar di Indonesia dan merupakan teluk semi tertutup yang memiliki biodiversitas hayati laut tinggi. Lokasi TC yang berada dekat ekuator dan berhadapan dengan Ekuator Samudera Pasifik bagian barat diduga memiliki dinamika dan variabilitas laut yang unik. Penelitian ini bertujuan untuk mengkaji pola sirkulasi laut, variabilitas arus, biogeokimia serta pengaruh fenomena El Nino Southern Oscillation (ENSO) di kawasan TC. Dataset deret-waktu yang digunakan adalah keluaran model sirkulasi laut dari Infrastructure Development of Space Oceanography (INDESO) dari tahun 2008-2015. Hasil penelitian terungkap bahwa pola sirkulasi arus permukaan di luar teluk dicirikan dengan pembalikan arah arus dua kali dalam setahun yang sejalan dengan pembalikan angin muson, sedangkan di dalam TC arus permukaan cenderung selalu mengalir keluar teluk. Sirkulasi di kedalaman 110 m dicirikan dengan dominasi Arus Pantai Papua (APP) yang bergerak secara permanen sepanjang tahun menuju barat laut dan terlihat terbentuk pusaran arus (eddy) pada musim timur. Arus muson terlihat sampai kedalaman 50 m, sedangkan APP berada pada kolom dari 50 m sampai 200 m (di Selat Biak) dan sampai 1000 m (di sisi Pasifik) dengan kecepatan maksimum 0,75 m/s. Rerata dan simpangan baku dari volume transpor APP adalah -25,25 (±11,1) Sv, sedangkan di Selat Biak -0,8756 (±0,5) Sv. Variabilitas dari transpor APP didominasi periodisitas tahunan. Rerata volume transpor di pintu masuk barat TC adalah 0,03 (±0,1096) Sv dimana variabilitasnya pada periode intra musiman. Variabilitas beberapa parameter biogeokimia di TC dan Pasifik didominasi periodisitas antar tahunan, tahunan dan intra musiman. Variasi antar tahunan dari parameter tersebut berkoherensi kuat dengan suhu permukaan laut di kawasan ekuator Pasifik, sebagai wilayah ENSO.

Komposisi jenis dan struktur komunitas ikan yang bermigrasi melewati tangga ikan pada Bendung Perjaya, Sungai Komering, Sumatera Selatan Muhammad Nizar; Mohammad Mukhlis Kamal; Enan M Adiwilaga
Depik Vol 3, No 1 (2014): April 2014
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.3.1.1280

Abstrak. Penelitian ini bertujuan untuk mendeskripsikan komposisi spesies dan struktur komunitas ikan yang dapat bermigrasi melewati tangga ikan pada Bendung Perjaya, Sungai Komering, Sumatera Selatan. Penelitian dilaksanakan pada 2013 dengan tiga kali sampling yaitu pada Maret, Mei, dan Juli mengikuti musim. Pengambilan sampel ikan menggunakan alat tangkap yang tidak selektif, yaitu langgian (hand operated scoop net). Hasil penelitian didapatkan 5 famili yang meliputi 21 spesies, dengan jumlah spesies terbesar berasal dari famili Cyprinidae (15 spesies). Beberapa spesies yang dominan adalah Labeobarbus leptocheilus dan Crossocheilus sp. Kondisi musim berpengaruh terhadap struktur komunitas ikan, dimana keanekaragaman dan kemerataan cukup tinggi terjadi pada musim hujan (Maret) dan peralihan (Mei) tetapi rendah pada musim kemarau (Juli). Dominansi tinggi terjadi pada musim kemarau (Juli) tetapi rendah pada musim hujan (Maret) dan peralihan (Mei).Kata kunci: Tangga ikan; Bendung Perjaya; Migrasi ikan; Struktur komunitas ikan; Cyprinidae

Ratio of coral reefs to macroalgae: An ecosystem approach management Aditiyawan Ahmad; Achmad Fahrudin; Mennofatria Boer; Yusli Wardiatno; Mohammad Mukhlis Kamal
Depik Vol 8, No 2 (2019): August 2019
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.8.2.13422

Abstract. The decline in the quality of coral reef ecosystems is not only caused by human activities but also caused by competition in ecosystems, including competition for space and nutrients. Research on the comparison of coral reefs with macroalgae is one of the determinants of coral reef health which is the basis for the management of coral reefs with an ecosystem approach. The purpose of this study was to analyze the comparison of coral reef cover with macroalgae. The research method used is Line Intercept Transect (LIT), the research location is 13 stations divided into 3 locations, namely north, centre, and south from Ternate Island in North Maluku. The results showed that the condition of coral reefs ranged from 24 – 86.60%, based on the condition categories of 13 observation locations, the coral reefs of Ternate Island were in very good condition at 15.38%, good conditions at 46.16%, adequate conditions at 30.77%, and damaged conditions 7.69%, while the condition of macroalgae cover ranged from 0 - 30.60% in the area of coral reef ecosystems. The ratio of the of coral reefs to algae ranges from 0 to 1.117, based on the ratio value, it is classified as low, medium to high, spread in the coral reef ecosystem of Ternate Island. Coral reef management strategies on Ternate Island include a continuous monitoring program for coral reef ecosystems, education on coral reef ecosystems, creating a conscious community of waste, and limiting the capture and restoking of herbivorous fish in coral reef areas.Keywords: Coral reef, ecosystem approach management, macroalgae, Ternate Island

The dynamics of target fishes resources in coral reef fisheries at coastal area of Ternate Island Faizal Rumagia; Mennofatria Boer; Rahmat Kurnia; Mohammad Mukhlis Kamal
Depik Vol 8, No 2 (2019): August 2019
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.8.2.13358

Abstract. As one of the coastal ecosystem, coral reef ecosystem is a magnificent marine ecosystem, where their species richness and composition play an important role for the ability of coral reef ecosystem to respond to the fishing activity and other stressors, where fishing has impacted the fish community, target or non-target reef fish species. The dynamic of reef fish resources, especially the target species, become one of the aspects that must be considered in the management and utilization of the fisheries resources in the coral reef ecosystem and their surrounding area. The purpose of the study was to analyze the dynamics of the target fish in the coral reef fishing activity at the coastal area of Ternate Island, from the growth, mortality and exploitation ratio aspect. The research was conduct from April to August 2018 in the coastal area of Ternate Island. The data sampling was growth parameters data through length and weight measurement. Total sample measure along the research time was 6245 sample (consist of seven family and 11 species). The result shows that the target fish have asymptotic length (L∞) range from 263.16–483.16 mm, with growth coefficient (K) ranging from 0.61–0.92 per year. The theoretic age at length 0 (t0) ranges from minus 0.0825–0.1669 year (equal to 30-61 day). The fishing mortality rate (F) is lower than the natural mortality rate (M), which resulting the exploitation rate (E) for the target fish mostly under 50%, which indicated that the utilization of the reef fishes in the coastal area of Ternate Island is still under-exploited.Keywords: Exploitation rate, Growth parameters, Length-weight relationship, Mortality rate, Stock assessment

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