Penelitian ini diadakan untuk menganalisis faktor internal dan eksternal yangberpotensi menjadi kekuatan, peluang, kelemahan dan ancaman dalam pengambilankeputusan strategis yang berkaitan dengan penetapan visi, misi serta tujuan pengembanganperikanan budidaya air tawar. Dengan tujuan akhirnya adalah untuk menentukan strategitepat guna dan tepat sasaran yang harus dikembangkan untuk mendukung kegiatanbudidaya perairan di sepanjang aliran Sungai Sibundong demi meningkatkan kesejahteraanmasyarakat yang lebih efektif di Kecamatan Sorkam Kabupaten Tapanuli Tengah. Metodayang digunakan dalam penelitian ini yakni wawancara dan pengisian kuisioner yangdilakukan kepada masyarakat Dukuh III Kelurahan Sorkam Kiri Kecamatan Sorkam dankemudian dianalisis dengan menggunakan metoda SWOT yang menghasilkan strategipengembangan mendukung kebijakan pertumbuhan yang agresif yakni penetrasi pasar,perluasan pasar, dan pengembangan produk secara intensif. Prioritas kebijakan yangdiambil sebagai hasil dari penelitian ini adalah: (1) Optimalisasi penggunaan sarana danprasarana yang sudah tersedia, (2) Melakukan perluasan segmen pasar, (3) Peningkatankualifikasi sumberdaya manusia, dan (4) Peningkatan teknologi perikanan yangmemperhatikan aspek teknis dan non teknis.

Lamun merupakan tumbuhan laut yang mampu menyimpan karbon dalam bentuk biomassa yangdiserap melalui proses fotosintesis, sehingga lamun memainkan peran yang luar biasa dalam mitigasiisu perubahan iklim global. Penelitian ini dilaksanakan pada bulan April 2016. Analisis biomassadan cadangan lamun dilakukan di Laboratorium Kimia Laut, Fakultas Perikanan dan Ilmu Kelautan,Universitas Riau. Hasil penelitian menunjukkan bahwa terdapat 6 species lamun pada plot, dimanaspecies terbanyak adalah C. rotundata dan species paling sedikit jumlahnya E. acroides. Nilaibiomassa total dan cadangan karbon total lamun berturut-turut adalah 213,10 ton bk/ha dan 72,46ton C/ha. Cadangan karbon pada ekosistem lamun di lokasi penelitian ini tidak memiliki perbedaansignifikan pada jarak 0 m, 50 m dan 100 m. Tingginya potensi biomassa dan cadangan carbon padaekosistem padang lamun menggambarkan besarnya peran ekosistem ini dalam menanggulangidampak buruk dari pemanasan global dengan cara menyerap karbon dioksida dan menyimpannyadalam bentuk biomassa. Hal ini dapat dijadikan sebagai acuan dalam membuat perencanaan mitigasiisu perubahan iklim global dan kegiatan konservasi pada ekosistem ini.

There is still a different perspective on the fishery aspect of the importance of diversifying the fish farming business in freshwater, causing a low quantity of aquaculture entrepreneurs as well as the diversity of fish cultivation businesses in freshwater. Therefore, a reference basis is needed through a study on the perspective of these stakeholders to determine an appropriate cultivation business strategy to be implemented. The study used interview methods and questionnaires for 40 stakeholder respondents in the field of fisheries and analyzed with Analysis Hierarchy Process (AHP). The results show that land suitability, supportive laws and regulations, market demand, public perception/perspective, and adequate availability of human resources are the main contributing factors in the expansion of the freshwater fish farming business on Sibundong river. The actors expected by the community in the expansion of fish aquaculture business are Bappeda, Freshwater Seed Hall, Marine and Fisheries Affairs and Government of Central Tapanuli, and Matauli College of Fisheries and Marine Science. All of them can be achieved by coordinating between relevant agencies intensively, conducting training/making pilot pools of freshwater cultivation, improving the distribution channels of freshwater aquaculture fisheries, conducting multi-species cultivation, and conducting environmentally-minded cultivation.

The utilization of appropriate carbon sources will have a good impact on the application of biofloc technology in aquaculture. This study aims to determine the effect on adding the different carbon sources for growth and survival rate of tilapia fries (Oreochromis niloticus). The fries were kept by the densities 30 fries/tank. This study used a completely randomized design (CRD) with 4 treatments and 3 replications. The treatments were the addition of different carbon sources on the media biofloc : A (tapioca), B (molasses), C (wheat flour), and K (control). The results showed that the absolute rate of weight and length were found on the treatment of molasses (B) was 5.84 grams, 3.5 cm, and significantly different from the other treatments (P <0.05). While the highest survival rate is 83.33% at molasses (B). The mean temperature at 28.1 to 30.00 oC, the DO from 5.00 to 7.60 mg / L, and pH 5.00-7.20.

The excessive use of Mud Shells (Anodentia edentula) as a staple food by the people of Kalangan Village, Central Tapanuli Regency caused the decline of the shellfish population. This is marked by the scattering of mud shells at research sites and often people conduct shell-searching activities at low tide. Therefore, a scientific study is needed to know the density and distribution patterns as the basis for the possibility of cultivation activities, management of mud shell germplasm (Anodentia edentula), and mangrove ecosystems in kalangan area in the future optimally, sustainably, and sustainably. The study was conducted in September 2020, using the 1x1m2 transect method purposive sampling at low tide. The results showed that the density of Mud Shells (Anodentia edentula) amounted to 150 ind/m2 in Station I, 0 ind/m2 in Station II with distribution pattern clustering, and 43 ind/m2 in Station III with distribution pattern random. With the evidence that there is a research station that contain zero mud clam and with unsimilarity in distribution pattern that should be clustering in every research station, therefore it can be concluded that the abudance of mud clam in the ecosystem already decline both quantifically and qualitativelyand requires conservation and cultivation action to ensure its existence in the future.