To compensate the decline of the populations of temperate anguillid eels, tropical anguillid eels become getting attention of East Asian eel market in recent years. Many eel farms have been established in Java Island to culture tropical anguillid eels intending to export the products to East Asia. Since eel farming is reliant on wild-caught anguillid eels such as glass eels, elvers and yellow eels, these eel seeds have been captured in various places in Indonesia. However, it is still unknown that how much of tropical anguillid eels are caught as seeds for eel farming. This study showed two different patterns of the commodity chains of eel seeds from both Sukabumi Regency and Bengkulu Province to the eel farms in Java Island. Official catch statistics on anguillid eels found in both Sukabumi Regency and Bengkulu Province were also analyzed on their features and problems underlied. Considering the sustainable use of anguillid eel resources and critical stances on exploitation of eel seeds from all over the world, the Indonesian government should take an immediate action for developing the national catch statistics on anguillid eel fishery as soon as possible.

Kerinci Lake is a type of tectonic lakes located in a protected forest area of National Park of Kerinci Sebelat and a source of various fish species important for local people for their daily food comsumption and income. However, few information is available on its limnological condition and fish resources. Field research observing the limnological condition and estimating the potential fish production was conducted four times in April, June, August and October 2013. The research is aimed to describe the condition of limnology to estimate the potential fish production of the lake. Limnological aspect included the physico-chemical and biological parameters, namely: temperature, water transparency, depth, substrate, conductivity, pH, dissolved oxygen, alkalinity, ammonia, nitrate, phosphate, total phosphorus, chlorophyll-a and trophic state. Potential fish production was calculated by using the biological parameter levels of chlorophyll-a. The results show that the euphotic layer of the lake waters was still feasible for fish life. Water condition of the bottom layer was less supportable for fish life due to low dissolved oxygen content. Trophic state index (TSI) values, either measured by temporal or spatial ways, had TSI with an average of 61.75. From these indeces, the lake is classified as a lake at the high productivity level (eutrophic). Annual fish production was an average of 307 kg/ha/year. By taking account the average of fish production and the total area of lake of around 4,200 ha, the potential fish production of Kerinci Lake is estimated about ± 1,287 tons/year.

Penelitian ini dilaksanakan pada tahun 2007 dan 2008 dengan lokasi estuari Sungai Musi, Sumatera Selatan. Penelitian ini bertujuan untuk mengetahui kebiasaan makan dan hubunganpanjang bobot ikan gulamo keken (Johnius belangerii) di estuari Sungai Musi yang berfungsi sebagai data dasar dalam pengelolaan sumber daya perikanan. Pengambilan ikan contoh dilakukan pada bulan Juli 2007 dan Januari 2008 dengan menggunakan alat tangkap jaring kantong dan trawl. Analisis data meliputi hubungan panjang bobot, faktor kondisi, luas relung makanan, dan indeks preponderance. Frekuensi ikan gulamo keken yang diamati selama penelitian berjumlah 81 ekor dengan panjang total berkisar antara 7,2-23,8 cm. Berdasarkan pada analisis hubungan panjang bobot Ikan gulamo keken diperoleh nilai b 2,8266 dengan nilai koefisien korelasi (r) sebesar 0,93. Hasil uji t menunjukkan pola pertumbuhan ikan gulamo keken yaitu allometrik negatif dan faktor kondisi memiliki kisaran nilai antara 0,58-1,44 dengan rata-rata 1,01. Ikan gulamo keken merupakan jenis ikan karnivora dengan nilai perbandingan panjang usus dengan panjang tubuh berkisar antara 0,22-0,73 (<1). Makanan yang ditemukan di dalam saluran pencernaan ikan gulamo keken adalah udang (89,39%), ikan (6,56%), kepiting (4,03%), dan serangga (0,02%). Sedangkan luas relung makanan tergolong kecil yaitu sebesar 1,24.

Situ Gede is one of the artificial lakes/reservoirs in Tasikmalaya, West Java. The lake has functioned as a source of household water needs, fisheries, and tourism. According to determine the development of water management requires information on the trophic status and water quality. This study aimed to obtain information on the trophic status and water quality of Situ Gede. The research was conducted in Situ Gede, Tasikmalaya, West Java, in 2018. Measurement and analysis of water quality parameters used the SNI and APHA methods, while the measurement of trophic status used the Carlson Trophic State Index (TSI). The relationship between water quality parameters and TSI scores was analyzed using Statistica version 8. Based on the analysis, the trophic status of Situ Gede ranged from 69.06-79.04, with an average of 74.61. This value indicated that Situ Gede's trophic status was on a eutrophic level. The physical and chemical parameters that affect the trophic status of Situ Gede are TP, pH, conductivity, TDS, and temperature. The TP values, conductivity, pH, and temperature at Situ Gede were still categorized as normal. The trophic of Situ Gede can be a source of fish growth. Moreover, in general, Situ Gede waters still have sufficient water quality for fish life. Therefore, Situ Gede has the potential to capture fisheries, recreational fisheries, and aquaculture.Keywords:Trophic statusSitu GedeFisheryChlorophyll-aFish Reserve

Study on habitat and biological characteristic of Tilapia (Oreochromis niloticus) in Batur lake have been carried out in Februari until November 2011. The result investigations of water quality parameters at six research station showed that support for the life of Tilapia. Exploitation rate of Tilapia was exceed the optimum rate (over fishing). Tilapia in Batur lake was able to reach 41,45 cm on size with growth rate (K) 0,52 per year. Tilapia in Batur lake was spawn throughout the year (IKG < 20%) with the top of spawning on March and July. The size of first maturity was 17,559 – 20,408 cm. Tilapia in Batur Lake was herbivore to omnivore as the first consumer level with generalis pattern.