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Hasani Q, Yusup MW, Caesario R, Julian D, Muhtadi A. 2022. Autoecology of Ceratium furca and Chaetoceros didymus as potential harmful algal blooms in tourism and aquaculture sites at Teluk Pandan Bay, Lampung, Indonesia. Biodiversitas 23: 5670-5680. Harmful algal blooms (HABs) phenomenon has been observed around tourism and aquaculture sites in Teluk Pandan Waters, Lampung Bay. The dominant potential HABs found in Teluk Pandan waters were Ceratium furca and Chaetoceros didymus. This study aimed to analyze the relationship between the environmental physicochemical factors and the abundance of C. furca and C. didymus as potential HABs. Phytoplankton samples were collected from four stations (Hurun Bay, Sidodadi Coastal Waters, Sari Ringgung Beach and Cikunyinyi Bay) during May-August 2022. Physical parameters (temperature, depth, brightness, current velocity and salinity), as well as chemical parameters (dissolved oxygen, pH, phosphate, nitrite, nitrate and ammonia) were all measured in conjunction with phytoplankton sampling. Canonical correlation analysis and multiple regression were used to predict the effect of environmental parameters on phytoplankton density. Blooms of C. furca were found with the highest density at 5.417×106 cells/L in Cikunyiyi Bay, while C. didymus predominated in Hurun Bay (2.890×104 cells/L), Sidodadi Coastal Waters (3.923×104 cells/L) and Sari Ringgung Beach (3.531×104 cells/L). The main factors influencing the increase in C. furca population at Cikunyinyi Bay were pH, phosphate and nitrate. The increase in C. didymus population at Sidodadi Coastal Waters was affected by phosphate, nitrate and nitrite, while phosphate and nitrate influenced the increase in C. didymus population at Sari Ringgung Beach. Potentially HABs density was found to be higher near intensive shrimp farming sites. The use of fertilizer and artificial feed in high quantities is thought to be responsible for increased water eutrophication. Periodic monitoring and consistent determination of environmental carrying capacity for intensive shrimp farming activities are required to control HABs and ensure the sustainability of aquaculture and tourism activities in Teluk Pandan Waters.

Tilapia (Oreochromis niloticus) is a freshwater fish commodity that has high economic value, is widely cultivated and has high demand. However, the obstacle that is often experienced by farmers is the high price of feed caused by the high price of imported feed raw materials. Overcoming this can be done by looking for alternative raw materials that can replace soybean meal flour such as fermented lemna flour. This research was conducted to study the growth performance of tilapia fed a test feed using fermented lemna flour (Lemna sp.) substitution. The total treatment used was 5 treatments and 3 replications, with a completely randomized design (CRD). Treatment A (0% TLF), B (25% TLF), C (50% TLF), D (75% TLF), and treatment E (100% TLF). Parameters observed were absolute weight gain, daily growth rate, protein retention, feed conversion, protein efficiency ratio, survival rate, and water quality. The results showed that treatment B (25% TLF) gave the best results compared to other treatments, where the absolute weight growth rate reached 7.11 g, the daily growth rate (SGR) was 3.39%, feed conversion (FCR) was 2.22 and protein retention 36.08%.

Tujuan pengabdian kepada masyarakat yang dilakukan di Desa Raja Basa Lama, Kecamatan Labuhan Ratu, Kabupaten Lampung Timur, antara lain memberikan penyuluhan dan pelatihan pembuatan amoniasi limbah pertanian, memberikan penyuluhan dan pelatihan pembuatan silase limbah pertanian sebagai pakan ternak, Target kegiatan pengabdian yang dilakukan yaitu peternak mampu meningkatkan kualitas pakan dari limbah pertanian dengan menggunakan teknologi tepat guna sehingga dapat membantu meningkatkan produktivitas ternak. Kegiatan dilaksanakan selama 3 bulan dengan kolaborasi tim dosen pengabdian dan mitra kelompok tani Karya Budi. Kegiatan yang dilakukan berupa penyuluhan pembuatan pakan amoniasi dan silase dari limbah pertanian, serta pendampingan praktik pembuatan pakan amoniasi dan silase. Hasil kegiatan yang diperoleh berupa produk pakan amoniasi dan pakan silase dengan bahan baku pakan limbah pertanian. Pemberian penyuluhan oleh tim pengabdian meningkatkan pengetahuan mitra dilihat dari hasil pretes dan postes. Kata kunci: Amoniasi, Limbah Pertanian, Pakan, Silase, Ruminansia

Akuaponik merupakan sistem budidaya yang memadukan sub sistem akuakultur dengan sub sistem hidroponik sehingga menjadi suatu sistem produksi pangan terpadu (ikan hias dan tanaman). Produk ikan hias dan sayur melalui teknologi akuaponik lebih sehat, karena menggunakan bahan organik pada pelaksanaannya. Program ini dilakukan di kampung totokaton Kecamatan Punggur, Kabupaten Lampung Tengah. Bekerja sama dengan mitra kelompok pembudidaya ikan Betta 13. Adapun target luaran dari program kemitraan masyarakat ini adalah (1) meningkatkan keterampilan kelompok mitra, dengan menggunakan teknologi akuaponik yang memadukan teknik budidaya ikan hias dengan teknik hidroponik, (2) meningkatkan produktivitas hasil budidaya ikan hias (tidak terserang penyakit), dengan pengelolaan air yang baik dan ramah lingkungan, sehingga dapat tercipta produk ikan hias sebagai komoditas unggulan di desa totokaton, (3) membangun kemitraan dan kerjasama yang efektif antara Perguruan Tinggi dengan kelompok-kelompok masyarakat di Desa totokaton, akan (4) mengembangkan pola pemberdayaan kolaboratif melalui pendampingan dalam transfer keterampilan, modal dan akses pemasaran yang lebih luas. Metode yang digunakan dalam pemberdayaan didasarkan pada kelayakan usaha, ketersediaan produk, nilai ekonomi produk, ketersediaan SDM pengelola, teknologi, aspek financial dan dampak sosialnya. Berdasarkan hasil pengabdian masyarakat mengenai akuaponik, sistem ini mampu memberikan solusi pada permasalah keterbatasan air bersih yang dihadapi oleh pembudidaya ikan hias. Selain mendapatkan hasil panen ikan hias, pembudidaya pun dapat panen sayur organik. Sehingga akan dapat menambah profit para pembudidaya. Dengan demikian aplikasi tekologi akuaponik akan mampu meningkatkan kesejahteraan kelompok-kelompok masyarakat di daerah totokaton Kata kunci: Akuaponik, kelompok pembudidaya ikan, ikan hias, sayuran organic

One of the problems in North African Catfish (Clarias gariepinus) breeding is the inability to spawn spontaneously due to a specific spawning season. This happens due to reproductive dysfunction resulting in a slow development of gonads in catfish broodstock. This research aimed to study the effect of injection of pituitary gland extract from Striped Catfish head waste on the spawning performance of North Africans Catfish. This study used a completely randomized design (CRD) with 4 treatments and 3 replications. The treatments were A (pituitary gland 0 mg/kg broodstock), B (pituitary gland 200 mg/kg broodstock), C (pituitary gland 300 mg/kg broodstock), and D (pituitary gland 400 mg/kg broodstock). The spawning process was performed with a ratio of 1:1 between male and female broodstock. The pituitary gland was injected into the head of female catfish at 07:30 pm and at 04:00 am. The research parameters observed were relative fecundity, fertilization rate (FR), hatching rate (HR), and survival rate (SR). The results showed that injection of the pituitary gland from Striped Catfish head waste could increase spawning performance with relative fecundity reaching of 31,357±12,265 eggs/ kg of female broodstock, FR 65±4%, HR 74±14%, and SR 81±10%. Therefore, hypophysation by utilizing Striped Catfish head waste is effectively increases the spawning performance of North African Catfish (Clarias gariepinus) seen from the high values of relative fecundity, FR, HR, and SR of larvae in treatment B (200 mg/kg broodstock).