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Karakteristik Populasi Labi-labi Amyda cartilaginea (Boddaert, 1770) yang Tertangkap di Sumatera Selatan Sentosa, Agus Arifin; Wijaya, Danu; Suryandari, Astri
JURNAL BIOLOGI INDONESIA Vol 9, No 2 (2013): JURNAL BIOLOGI INDONESIA
Publisher : Perhimpunan Biologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/jbi.v9i2.164

The Asiatic softshell turtle Amyda cartilaginea (Boddaert, 1770) is one of the reptile commodities included in CITESAppendix II with vulnerable status according to IUCN. The species has been harvesting, especially for export purposein South Sumatera. The reseach was aimed to know the population characteristics of the Asiatic softshell turtleharvested in South Sumatera. The study was carried out based on enumerators approach from July to Desember2012 in South Sumatera. The data enumeration also has been collected from the 1st collectors. Data analysis includedthe size distribution of carapace curve length (CCL), carapace curve width (CCW), body weight, sex ratio, agestructure, CCL-weight relationship and von Bertalanffy growth parameters. The results showed that there wererecorded 306 individuals of A. cartilaginea (92% adult) with sex ratio male and female is 42:58. Its has carapacecurve length range from 10 to 75.5 cm, carapace curve width 9 to 59.5 cm and body weight 0.02 to 40 kg. A.cartilaginea growth pattern was negatively allometric (b = 2.727). The von Bertalanffy growth formula of A.cartilaginea in South Sumatera was PLK(t) = 78,75{1-exp[-0,18(t-(-0,72)]} cm.Keywords: Amyda cartilaginea, population characteristics, South Sumatera

STRUKTUR KOMUNITAS IKAN INTRODUKSI DI DANAU BATUR, BALI [Community Structure of Introduced Fish in Lake Batur, Bali] Sentosa, Agus Arifin; Wijaya, Danu
BERITA BIOLOGI Vol 11, No 3 (2012)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Lake Batur is the largest lake in Bali island, however information on introduced fish community is not available yet. The research aimed to identify the community structure and ecological status of the introduced fish in Lake Batur, Bali. The study was carried out on May, July and October 2011 using survey method. The fishes were obtained using experimental gill nets and by fishermen. Data analysis included index of diversity, evenness, dominance, species richness and the abc (abundance-biomass comparison) curve. The results showed the tilapia (Oreochromis niloticus) was the dominant species. The status of introduced fish community suggested to ecological stress but it was relatively undisturbed.

Kajian Awal Kemunculan Hiu Paus (Rhyncodon typus, Smith 1828) di Teluk Tomini Dihubungkan dengan Faktor Fisik dan Biologi Perairan Rahman, Arip; Haryadi, Joni; Sentosa, Agus Arifin; Mujiyanto, Mujiyanto
Jurnal Akuatika Indonesia Vol 2, No 2 (2017): Jurnal Akuatika Indonesia (JAkI)
Publisher : Fakultas Perikanan dan Ilmu Kelautan, Universitas Padjadjaran

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Kemunculan hiu paus di Desa Botubarani Teluk Tomini Gorontalo menjadi fenomena langka bagi masyarakat setempat. Kegiatan pengamatan kemunculan hiu paus (Rhincodon typus) dilakukan pada bulan April dan Mei 2016 di Teluk Tomini Gorontalo. Metode penelitian yang digunakan adalah pengamatan bawah air untuk mengidentifikasi hiu paus dan tingkah lakunya. Pengukuran kualitas air dan pengambilan sampel plankton dan larva dilakukan disekitar lokasi kemunculan hiu paus. Selama pengamatan ditemukan lima ekor hiu paus dengan ukuran berkisar 3-8 m. Tingkah laku hiu paus yang teramati oleh penyelam, hiu paus muncul dari kedalaman >100 m kemudian berenang berputar-putar pada kedalaman 15-20 m sesekali membuka mulutnya untuk menyaring makanan. Hasil pengamatan kualitas air disekitar lokasi kemunculan hiu paus, nilai salinitas berkisar antara 31,96-33,23 0/00, nilai oksigen terlarut berkisar 6,02-7,48 mg.l-1. Kelimpahan zooplankton tertinggi diperoleh pada pengamatan bulan April yaitu AcartiaÂ sp. dari kelas Crustaceae dengan kelimpahan 12385 ind.l-1. Kelimpahan larva disekitar lokasi kemunculan hiu paus didominasi oleh copepod dan larva ikan. Faktor makanan diduga menjadi salah satu faktor munculnya hiu paus di Teluk Tomini.

Growth Pattern and Condition Factor of Spinner Shark Carcharhinus brevipinna in Southern Nusa Tenggara Waters Sentosa, Agus Arifin; Fahmi, Fahmi; Chodrijah, Umi
Oseanologi dan Limnologi di Indonesia Vol 3, No 3 (2018)
Publisher : Indonesian Institute of Sciences

The spinner sharks are one of shark commodities that are utilized optimally from the southern of Nusa Tenggara waters, however, the scientific information is still limited. This study aimed to assess the growth pattern and condition factors of the spinner shark, Carcharhinus brevipinna in southern Nusa Tenggara waters. The research was conducted from January to December 2016 using direct recording of the catch data. Information on length, weight and sex determinations were collected by the enumerator. The data was analysed descriptively with the shark condition was determined based on the relative condition factor obtaining from the length-weight relationship. The results showed that growth patterns of the spinner shark, both males and females, were allometrically negative. The relative condition factors of the catch of male sharks were ranged from 0.206 Ã¢Â€Â“ 2.225Ã‚Â and females from 0.237 Ã¢Â€Â“ 3.361. The condition factors of spinner sharks were not different between sexes and time of fishing, but they were different in length classes

SEBARAN LOUHAN YANG MENJADI INVASIF DI DANAU MATANO, SULAWESI SELATAN Sentosa, Agus Arifin; Hedianto, Dimas Angga
LIMNOTEK - Perairan Darat Tropis di Indonesia Vol 26, No 1 (2019)
Publisher : Research Center for Limnology

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Ikan louhan adalah ikan Cichlid yang awalnya merupakan ikan hias, namun karena popularitasnya mulai menurun, maka ikan tersebut dilaporkan banyak dilepaskan di Danau Matano. Ikan louhan diduga telah menjadi invasif di danau tersebut. Keberadaan ikan tersebut di Danau Matano perlu dikaji dan dikendalikan untuk menjaga kelestarian keanekaragaman hayati jenis ikan asli dan endemik. Penelitian ini bertujuan untuk mengkaji sebaran ikan louhan di Danau Matano, Sulawesi Selatan. Penelitian dilakukan pada 13 stasiun pengamatan di Danau Matano, Sulawesi Selatan pada tahun 2015 dan 2016. Ikan louhan ditangkap menggunakan jaring insang percobaan dan catatan data enumerator. Hasil menunjukkan bahwa berdasarkan 4156 ekor ikan louhan yang tertangkap memiliki kisaran panjang total antara 4,0-22,4 cm dengan berat tubuh berkisar antara 1,26-239,76 gram. Ikan louhan telah menyebar di seluruh perairan Danau Matano, terutama di daerah litoral. Kelimpahan louhan tertinggi terdapat pada stasiun Soroako dan Petea.

NISHAH KELAMIN, HUBUNGAN PANJANG-BERAT DAN UKURAN REPRODUKSI HIU Hexanchus spp. DI PERAIRAN SELATAN NUSA TENGGARA Sentosa, Agus Arifin
BERITA BIOLOGI Vol 18, No 2 (2019)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Hexanchus spp. are shark species that are often caught in the Indian Ocean southern Nusa Tenggara and its status is Near Threatened, but the information is still relatively limited. This study aimed to sex ratio, length-weight relationship and reproductive size of sixgill shark, Hexanchus spp. caught from southern Nusa Tenggara waters. This study had been carried out during 2016 at the Fishing Port of Tanjung Luar, East Lombok, West Nusa Tenggara. Shark data collection was done by measuring the length, weight, maturity and fishing data. Data were analyzed by formula of sex ratio, length-weight relationship, length at first maturity (Lm) and length at first catch (Lc). The results showed that Hexanchus spp. caught in the southern Nusa Tenggara waters consisted of H. nakamurai (81.82%) and H. griseus (18.18%). The sex ratio of both sharks was dominated by the female. The average of the total length of H. griseus (218.3 ± 96.08 cm). It was longer than H. nakamurai (127.6 ± 30.35 cm). The length-weight relationship of H. griseus was formulated as W = 0.0195 LT 2,6344 (R² = 0,9265) and H. nakamurai with the formula W = 0.002 LT 3,1098 (R² = 0.902). Both species have the size of Lm was bigger than the size of Lc which indicated to their population vulnerability.

KARAKTERISTIK POPULASI LABI-LABI AMYDA CARTILAGINEA (BODDAERT, 1770) YANG TERTANGKAP DI SUMATERA SELATAN Sentosa, Agus Arifin; Wijaya, Danu; Suryandari, Astri
JURNAL BIOLOGI INDONESIA Vol 9, No 2 (2013): JURNAL BIOLOGI INDONESIA
Publisher : Perhimpunan Biologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/jbi.v9i2.164

The Asiatic softshell turtle Amyda cartilaginea (Boddaert, 1770) is one of the reptile commodities included in CITESAppendix II with vulnerable status according to IUCN. The species has been harvesting, especially for export purposein South Sumatera. The reseach was aimed to know the population characteristics of the Asiatic softshell turtleharvested in South Sumatera. The study was carried out based on enumerators approach from July to Desember2012 in South Sumatera. The data enumeration also has been collected from the 1st collectors. Data analysis includedthe size distribution of carapace curve length (CCL), carapace curve width (CCW), body weight, sex ratio, agestructure, CCL-weight relationship and von Bertalanffy growth parameters. The results showed that there wererecorded 306 individuals of A. cartilaginea (92% adult) with sex ratio male and female is 42:58. Its has carapacecurve length range from 10 to 75.5 cm, carapace curve width 9 to 59.5 cm and body weight 0.02 to 40 kg. A.cartilaginea growth pattern was negatively allometric (b = 2.727). The von Bertalanffy growth formula of A.cartilaginea in South Sumatera was PLK(t) = 78,75{1-exp[-0,18(t-(-0,72)]} cm.Keywords: Amyda cartilaginea, population characteristics, South Sumatera

The Abundance and Community Structure of Phytoplankton in the Ir. H. Djuanda Reservoir Following the Implementation of the “Citarum Harum” Program Sentosa, Agus Arifin; Suryandari, Astri; Hadi, Abdul; Putri, Didha Andini; Gumilang, Andi Perdana; Kusumaningtyas, Dyah Ika; Sarbini, Rakhmat; Susilawati, Evi; Dwiatmojo, Santoso; Hendrawan, Andika Luky Setiyo; Astuti, Iswari Ratna
Barakuda 45: Jurnal Ilmu Perikanan dan Kelautan Vol 7 No 1 (2025): Edisi April
Publisher : Fakultas Perikanan dan Ilmu Kelautan Universitas 17 Agustus 1945 Cirebon

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47685/barakuda45.v7i1.585

The Ir. H. Djuanda Reservoir in Purwakarta Regency is one of the priority areas in the implementation of the Citarum Harum programme, which focuses on restoring the environmental quality of the Citarum River. This study aims to determine the abundance and community structure of phytoplankton in Ir. H. Djuanda Reservoir after the implementation of the Citarum Harum Programme. This study used purposive sampling method at 11 stations in Ir. H. Djuanda Reservoir in August 2024. Phytoplankton abundance was measured based on APHA and community structure was analysed using ecological indicators including diversity, variability and dominance indices. Water quality assessment was determined using the STORET method as the analytical instrument. Statistical analyses were also conducted to assess differences in phytoplankton abundance between stations. The results showed that the phytoplankton community in Ir. H. Djuanda Reservoir during the study consisted of five classes and 31 genera with low diversity and evenness and no dominance. Phytoplankton abundance ranged from 389,048 - 710,536 cells/L and differed between stations (P<0.05). The relative abundance of Cyanophyceae (46.60%) was almost equal to Chlorophyceae (43.45%) indicating a change in the environment for the better. This study is expected to be one of the references for monitoring and evaluation materials for the implementation of the Citarum Harum programme as empirical evidence that there has been a change in the water quality status of Ir. H. Djuanda Reservoir from heavily polluted to moderately to lightly polluted.

Analisis Kandungan Klorofil-a Sebagai Indikator Penentu Status Trofik dan Potensi Produksi Ikan di Waduk Jatiluhur Purwakarta Hidayat, Panjalu Fikri; Sentosa, Agus Arifin; Kusumaningtyas, Dyah Ika; Atmojo, Santoso Dwi
MANILKARA: Journal of Bioscience Vol 4 No 1 (2025): August
Publisher : LPPM Universitas Terbuka

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33830/manilkara.v4i1.12946.2025

Waduk Jatiluhur sebagai waduk strategis di Indonesia menghadapi tekanan antropogenik yang berpotensi meningkatkan eutrofikasi dan memengaruhi produktivitas perikanan. Penelitian ini bertujuan menganalisis kandungan klorofil-a sebagai indikator status trofik dan estimasi potensi produksi ikan di Waduk Jatiluhur. Pengambilan sampel air dilakukan di 8 stasiun dengan kedalaman 0 dan 3 meter. Klorofil-a dianalisis menggunakan metode spektrofotometri trichromatric di Laboratorium Balai Riset Pemulihan Sumber Daya Ikan (BRPSDI). Status trofik ditentukan berdasarkan klasifikasi Wetzel (2001) yang disempurnakan dengan pembaharuan Hollister et al. (2015)), sedangkan potensi produksi ikan pelagis dihitung menggunakan persamaan Almazan dan Boyd (1990). Hasil menunjukkan konsentrasi klorofil-a bervariasi antara 1,18 hingga 51,64 μg/L, dengan rata-rata 31,92 μg/L. Sebagian besar stasiun tergolong eutrofik hingga hipereutrofik, sementara Stasiun Galumpit tergolong oligotrofik. Estimasi produksi ikan pelagis tertinggi di DAM Utama (71.844,11 ton per tahun) dan terendah di Galumpit (2.502,53 ton per tahun), dengan rata-rata 49.716,14 ton per tahun. Pengelolaan berbasis zonasi serta kontrol masukan nutrien diperlukan untuk menyeimbangkan produktivitas perikanan dan keberlanjutan ekosistem.

Struktur Komunitas Plankton Sebagai Indikator Biologis di Perairan Waduk Ir. H. Djuanda Jatiluhur Sari, Fatma Devi Nur Indah; Suryandari, Astri; Sentosa, Agus Arifin; Sarbini, Rakhmat; Hendayana, Yayat
MANILKARA: Journal of Bioscience Vol 4 No 1 (2025): August
Publisher : LPPM Universitas Terbuka

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Waduk Ir. H. Djuanda Jatiluhur merupakan waduk buatan terbesar di Indonesia yang berperan penting dalam aktivitas manusia, sehingga rentan mengalami perubahan kualitas perairan. Plankton sebagai organisme sensitif di dasar rantai trofik, dapat digunakan sebagai indikator biologis untuk menilai kondisi ekosistem waduk. Penelitian ini bertujuan untuk menganalisis struktur komunitas fitoplankton dan zooplankton serta keterkaitannya dengan parameter kualitas air di Waduk Jatiluhur. Penelitian dilakukan di 8 stasiun pengamatan selama Februari-Juni 2025, meliputi pengukuran suhu, pH, oksigen terlarut, nitrat, dan fosfat. Identifikasi dan penghitungan plankton dilakukan untuk menentukan kelimpahan dan keanekaragaman, dianalisis dengan Indeks Keanekaragaman Shannon-Wiener. Hasil menunjukkan fitoplankton didominasi oleh Cyanophyceae (61%) dengan kelimpahan 8.214-54.048 sel/L, sedangkan zooplankton didominasi Rotifera (51%) dengan kelimpahan 0-2.143 sel/L. Indeks Keanekaragaman fitoplankton berkisar 1,21-2,39 dan zooplankton 0-1,85. Temuan ini mengindikasikan kondisi perairan waduk berada pada kategori mesotrofik hingga eutrofik. Struktur komunitas plankton mencerminkan kualitas air yang berkisar dari mesotrofik (nutrien sedang) hingga eutrofik (nutrien tinggi). Kondisi ini penting untuk pemantauan dan pengelolaan ekosistem waduk secara berkelanjutan.

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