The purpose of this study is to determine the right planting point and seed weight to produce optimal growth Kappaphycus alvarezii. Seaweed cultivation method used is bottom off method and seed used is tissue culture seaweed. This research was conducted from February to April 2016 at Nambung beach, Sekotong Subdistrict, West Lombok regency, West Nusa Tenggara Province. This research used experimental method in field with experimental design that used is Factorial Random Design (Factorial RAL). Treatment consists of 2 factors, where the first factor is 3 different planting point (10 meters from coastline, 20 meter from coastline and 30 meters from the coastline) and the second factor is the weight of different seeds (1.5 gram and 50 gram seed weight). The results showed that the planting position of seaweed and the weight of the seeds used gave effect to absolute growth. The interaction between planting position and seed weight also gives Kappaphycus alvarezii a significantly different growth. The conclusion of this research is the use of planting point and seed weight give interaction to each other.Keywords: growth, tissue culture, bottom off method, weight, cultivated

The purpose of this study was to determine the effect of different densities on Survival Rate (SR) spat pearl shells (Pinctada maxima) and the right density on the maintenance container in the sea. The method used is Completely Randomized Design (CRD) which consists of 6 treatments and 3 replications, namely treatment 1 (control) 60 ind / pocket; treatment 2 (93 ind / pocket); treatment 3 (126 ind / pocket); treatment 4 (159 ind / pocket); treatment 5 (192 ind / pocket); and treatment 6 (225 ind / pocket). Spat size used is 0.8-1.7 cm (45 days) in pocket net (47 x 60 cm). The results of the study for 45 days showed the highest SR percentage calculation (100%) owned by 225 ind / pocket (P6) density and 93 ind / pocket (P2) density. The lowest SR value is at P1 with 60 ind / pocket density and followed by other treatments such as P3, P4 and P5. However, the average growth rate of spat shell at 192 ind / pocket (P5) density tends to be faster with a value of 1.71 cm compared to 60 ind / pocket (P1) density which has the lowest value of 1.43 cm. Weight growth with the highest value in P4 (159 ind / pocket) with a value of 1, 30 gr and the lowest value of 1.00 gr was at P5 (192 ind / pocket). Based on the results of the study it was concluded that different stocking densities did not significantly (P> 0.05) the SR spat maintained for 45 days and the best stocking density for SR was obtained in treatment 2 (93 ind / pocket) and treatment 6 (225 ind / pocket).

<p><strong><em>Abstract. </em></strong><em>Fish meal, corn, and rice bran are feed ingredient which easily obtained. Different of quality and amount of each ingredients in fish feed result a various respons on fish.  </em><em>The ai</em><em>m of this study were </em><em>to determine respon of growth and feed consumption of walking cat fish (Clarias sp.) which fed feed made of fish meal, rice bran, and corn. The e</em><em>xperimental diets containing fish meal, corn </em><em>meal, and rice bran meal, respectively A. 70;10:19,5.; B. 60;25;14,5 C=60,19,75:19,75; D=60:9,5:30, and the other diets, E and F, were commersial diets. Daily growth rate, feed consumption, feed eficiency, and feed conversion ratio showed significant differences </em><em>(p&gt;0,05) among the treatments. In general, feed consumption rate, daily growth rate, feed efficiency, and feed conversion rate were best obtained on commercial feed, while feed made from local ingredients showed lower performance than commercial feed. The low quality of feed local ingredients were caused by used low quality of local ingredients which caused the level minimum of fibre and ash were high in 17,9% and 23,5%, respectively. The utilization of Local fish meal 60-70%, corn meal 9,5-19,75%, and rice bran meal 14,5-30% in fish diet did not result better growth performance than commercial diet, however the best formulation for local ingredients of fish meal, corn meal, rice bran meal were 60%; 19,75%; 19,75% and 60%; 9,5%;30 % respectively </em></p><p><strong><em>Keywords</em></strong><em> : Corn </em><em>meal; diets; feed consumption; </em><em>fish meal; growth; </em><em>rice bran; </em><em>walking catfish (Clarias sp.</em>)</p><p><strong>Abstrak.  </strong>Tepung ikan, jagung dan dedak padi adalah merupakan bahan baku yang mudah diperoleh dan dapat digunakan sebagai bahan baku pakan ikan, meskipun demikian perbedaan kualitas setiap jenis bahan baku dan jumlah pengggunaan setiap bahan baku dalam pakan dapat menghasilkan respon yang berbeda terhadap ikan. Penelitian ini bertujuan untuk mengetahui respon pertumbuhan dan konsumsi pakan ikan lele (<em>Clarias</em> sp.) yang diberikan pakan berbahan tepung ikan, tepung dedak padi, dan tepung jagung. Pakan uji yang dicobakan adalah pakan dengan komposisi tepung ikan: tepung jagung, dan: tepung dedak yang berbeda yaitu masing-masing A=70:10:19,5; B=60:25:14,5; C=60:19,75:19,75; D=60:9,5:30, serta dua pakan komersial yaitu E dan F Hasil penelitian menunjukkan bahwa pakan dengan komposisi bahan baku yang berbeda berpengaruh (<em>p&lt;0,05</em>) terhadap laju pertumbuhan harian, tingkat konsumsi pakan, efisiensi pakan dan rasio konversi pakan. Tingkat konsumsi pakan, laju pertumbuhan harian, efisiensi pakan dan rasio konversi pakan yang terbaik diperoleh pada pakan komersial sedangkan pakan yang berbahan baku lokal menunjukkan tampilan yang lebih rendah dibandingkan pakan komersial. Rendahnya kualitas pakan berbahan baku lokal diduga disebabkan oleh bahan baku lokal  yang digunakan memiliki kualitas yang rendah sehingga menghasilkan pakan dengan kandungan serat kasar dan abu yang tinggi masing-masing minimal 17,9% dan 23,5%. Penggunaan bahan baku local yaitu tepung ikan 60-70%, tepung jagung 9,5-19,75% dan dedak 14,5 – 30% belum dapat menghasilkan tampilan pertumbuhan yang lebih baik dibandingkan dengan pakan komersial, meskipun demikian formulasi terbaik  pakan berbahan baku lokal diperolah pada komposisi tepung ikan; jagung; dedak adalah 60%; 19,75%; 19,75% dan 60%; 9,5%;30 %.</p><p><strong>Kata kunci</strong>    : Ikan lele (<em>Clarias sp</em>.); konsumsi pakan; pakan; pertumbuhan; tepung dedak; tepung ikan; tepung jagung</p>

Kegiatan pengabdian kepada masyarakat (PkM) budidaya n kerang mutiara secara terintegrasi dengan tujuan untuk meningkatkan  produktivitas  keramba jaring  melalui penerapan dan pengembangan teknologi budidaya terintegrasi.  Metode pelaksanaan PkM ini adalah metode transfer teknologi, dengan langkah-langkah yang telah disepakati bersama antara lain sosialisasi kegiatan PkM, pelatihan,  demonstrasi plot (demplot) budidaya kerang mutiara sistem terintegrasi dan pendampingan. Hasil kegiatan PkM memberikan nilai posisif bagi masyarakat sasaran, dengan budidaya kerang mutiara sistem terintegrasi produksi keramba jaring apung  tidak lagi mengandalkan  pada satu komoditas, akan tetapi satu unit KJA dapat  menghasilkan lebih dari satu  komoditas yaitu lobster dan kerang mutiara.  Dengan demikian. diharapkan kegiatan ini terus dilanjutkan dan diperluas, sehingga tujuan dan manfaat program dapat tercapai dan berkontribusi pada peningkatan kualitas hidup dan pendapatan masayarakat

Nannochloropsis sp. is a microalgae that is cultivated as natural food and has an important role in the effort of hatching fish, shrimp, crabs and other marine biota. This study aims to determine the effect of urea concentration on the growth of Nannochloropsis sp cell population and the best concentration of fertilizers for the growth of Nannochloropsis sp. Cell populations. The method used in this study is the experimental method using a Completely Randomized Design (CRD), with 6 treatments namely giving KW21 fertilizer as much as 1 ml / L as a control, 0 mg / L, 15 mg / L, 30 mg / L, 45 mg / L and 60 mg / L were repeated 4 times. Observation of density is carried out for 24 hours. The parameters observed included population density of Nannochlorpsis sp. Cells, relative growth, self doubling time and specific growth. The results showed that the highest density of cell populations was Nannochlorpsis sp. obtained at the concentration of urea fertilizer 45 mg / L with a cell population density of 2.2625 million cells / mL which was reached at 24 hours after the adaptation phase. And the highest relative growth was 50.83% from the initial population density, and the shortest self doubling time was 40.8 hours with a specific growth of 0.8625% per hour. Based on the results of this study, it is recommended to cultivate Nannochloropsis sp. to increase the growth of cell populations is urea with a concentration of 45 mg / L.