No abstract

Purse seine is a common fishing gears used by fisherman in Muara Angke Fishing Port just after bouke ami fishing gears. The purpose of this research was to analize the selectivity level of purse seine fishing gears based on fishing catch composition. The data were collected in muara angke fishing port from 10 Mei to 1 June 2016. The data of fishing catch were collected at fish landing from 3 units of purse seine fishing boats and by accompanied one fishing boat which was operated in the Java Sea. The composisition of fishing catches and fork length of first maturity fish were analyzed in this study. The results showed that there were 14 species of fishes were cacth by purse seine in Java Sea with the total catch volume was 9.092 kg of total weight. The main catch composition was 21.35%, while the by-catch was reached 78.7%. A total 50.1% of main catch have been matured. It was concluded that purse seine fishing gears was classffied as low selectivity fishing gear.

Cikeruh River is one of the tributaries of the Citarum River which has received a variety of inputs, which can affect the river water quality and cause pollution. Macrozoobenthos is an organism that can determine the pollution of waters. This research aims to determine the spatial distribution of macrozoobenthos communities in the Cikeruh River as the indicator of pollution. This research was conducted in July 2019 - August 2019 using the field survey method. The data collection technique used is purposive sampling, setting 5 stations based on environmental factors and land use around the river flow. The parameters observed were the physical-chemical parameters of the waters, physical-chemical parameters of the substrate and macrozoobenthos as biological parameters as indicators of pollution, as well as calculating the abundance of macrozoobenthos, diversity index, uniformity index, species deficit and morisita index. The results of the macrozoobenthos spatial distribution along the Cikeruh River flow differed at each location of observation. At station 1 found several intolerant species Heptagenia sp., Tipula sp., Leptophelbia sp., Polycentrophus sp. and Enallagma sp., station 2 found several facultative species Melanoides tuberculata, Lymnaea sp., Tarebia granifera, Sulcospira testudinaria, dan Corbicula fluminea,, station 3 found several facultative species Melanoides tuberculata, Lymnaea sp., Tarebia granifera, Sulcospira testudinaria, Pomacea canalicuta and Corbicula fluminea, station 4 found several facultative species Melanoides tuberculata, Tarebia granifera, Sulcospira testudinaria and Corbicula fluminea, and station 5 found intolerant species Chironomus sp., Tubifex sp., dan Lumbriculus sp. The abundance of macrozoobenthos is around 590 ind/m2 - 7420 ind/m2. Diversity index ranges from 0.46-1.85. The uniformity index ranges from 0.16 to 0.64. Species deficits at each station are different. Cikeruh River morisita index ranging from 0.14 to 0.80 which is in the uniform category.

<p align="center"><strong>Abstract</strong><strong></strong></p><p>Aquaponics is new aquaculture integrating the technology of fishes and plants due to less availability of land. This study aimed to determine the optimum retention period in the aquaponics farming of sangkuriang catfish (<em>Clarias gariepinus</em>) integrated with water spinach (<em>Ipomoea reptan</em>) to generate the water to support the catfish production. This study conducted in 40 days between May to June 2016 at Ciparanje Fish Hatchery Laboratory, Faculty of Fisheries and Marine Sciences, Universitas Padjadjaran. The design of this study was completely randomized, with five treatments and three replications. The treatments retention periods were 5, 10, 15, 20 minutes, and control (no water flow). The study showed that the retention period affected water spinach’s inorganic nutrient absorption in sangkuriang catfish farm. The 15 minutes retention period gave the most desirable result, with a flow of 0.072 L/s that reduced 58.83% of nitrate, and 33.32% of ammonia has been produced by fish farming activities. The highest specific growth rate of the sangkuriang catfish obtained in 15 minute retention period of 4.01 %</p><p> </p><p>Keywords: aquaponics, sangkuriang catfish, water spinach, retention periods</p><p> </p><p> </p><p align="center"><strong>Abstrak</strong></p><p>Akuaponik adalah teknologi akuakultur baru yang mengintegrasikan ikan dan tanaman karena ketersediaan lahan yang semakin rendah. Penelitian ini bertujuan untuk menentukan periode retensi optimum pada budidaya akuaponik ikan lele sangkuriang (<em>Clarias gariepinus</em>) yang terintegrasi dengan kangkung air (<em>Ipomoea reptan</em>) untuk menghasilkan air yang mendukung produksi lele. Penelitian ini dilakukan selama 40 hari di Laboratorium Budidaya  Ikan Ciparanje, Fakultas Perikanan dan Ilmu Kelautan, Universitas Padjadjaran. Penelitian ini menggunakan rancangan acak lengkap, dengan lima perlakuan dan tiga kali ulangan. Perlakuan berupa periode retensi 5, 10, 15, 20 menit, dan kontrol (tidak ada aliran air). Hasil penelitian menunjukkan bahwa periode retensi memengaruhi penyerapan nutrisi anorganik oleh bayam air dalam budidaya ikan lele sangkuriang. Periode retensi 15 menit memberikan hasil yang paling baik,  dengan aliran 0,072 L/s mengurangi 58,83% nitrat, dan 33,32% amonia dalam media budidaya ikan. Laju pertumbuhan spesifik ikan lele sangkuriangtertinggi diperoleh pada perlakuan waktu retensi 15 menit, yaitu sebesar 4,01%. </p><p> </p><p>Kata kunci: akuaponik, ikan lele sangkuriang, kangkung darat, waktu retensi</p><p> </p><p> </p>

Waduk Cirata mengalami penurunan kualitas perairan, penyebab menurunnya kualitas perairan tersebut adalah masuknya limbah yang berasal dari limbah pertanian, domestik, industri, transportasi, peternakan dan perikanan. Terdapat jenis limbah yang masuk ke perairan mengandung logam berat timbal (Pb) seperti limbah industri, limbah transportasi dan limbah pertanian. Timbal berbahaya bagi lingkungan perairan dan organisme, yang banyak tersebar di Waduk Cirata seperti makrozoobenthos jenis tutut (Filopaludina javanica). Tutut dimanfaatkan sebagai sumber bahan pangan bagi warga di sekitar Waduk Cirata. Tujuan penelitian ini adalah untuk mengetahui tingkat pencemaran logam berat timbal (Pb) pada tutut di Waduk Cirata Jawa Barat. Penelitian dilakukan pada 18 September – 30 November 2018. Metode yang dilakukan adalah metode survey dan penentuan lokasi pengambilan sampel dengan purpose sampling. Pengambilan sampel air, substrat dan biota tutut dilakukan di tiga stasiun pengamatan. Analisis timbal (Pb) dilakukan pada sampel air, substrat, dan biota tutut dengan menggunakan Atomic Absorption Spectrophotometer (AAS). Hasil analisis menunjukkan bahwa Konsentrasi timbal (Pb) pada air yaitu 0,0307 mg/L, substrat berkisar antara 3,26 – 7,32 mg/kg dan tutut sebesar 0,05 mg/kg sedangkan nilai IFK0-s sebesar 0,0106 dan nilai IFK0-a sebesar 1,6286. Nilai konsentrasi yang dihasilkan pada air sudah melebihi ambang batas baku mutu sehingga perairan dapat dikategorikan sudah tercemar sedangkan nilai konsentrasi yang dihasilkan pada substrat dan tutut belum melebihi ambang batas baku mutu sehingga dikategorikan belum tercemar.