Rumput laut adalah salah satu komoditas perikanan yang perlu mendapatkan perhatian khusus terkait kualitas rumput laut untuk mendapatkan agar-agar berkualitas tinggi. Gracilaria verrucosa merupakan jenis rumput laut yang paling utama sebagai sumber penghasil agar (agarofit) yang sebagian besar dimanfaatkan baik dikonsumsi secara langsung maupun untuk kebutuhan industri. Penelitian ini bertujuan untuk mengetahui kualitas rumput laut yang meliputi kandungan rendeman agar, kadar air, kadar abu, serat kasar, Clean Anhydrous Weed (CAW), pengotor, viskositas, gel streght, derajat putih serta kadar sulfat rumput laut yang dibudidaya di tambak Kabupaten Karawang, Jawa Barat, dengan pendekatan analisis diskriptif berdasarkan hasil uji kimia di laboratorium. Penelitian ini dilakukan pada Bulan September 2017, dengan mengambil sample rumput laut dan kualitas air tambak sebanyak 15 stasiun secara acak. Berdasarkan hasil analisis kualitas agar-agar Gracilaria verrucosa di Kabupaten Karawang menunjukkan bahwa secara umum kualitas cukup baik. Kadar sulfat hanya mencapai 4.82% yang artinya bahwa zat pengotor dalam kandungan agar-agar relative rendah, yaitu di bawah 6%. Akan tetapi terdapat beberapa parameter yang kualitasnya cukup tinggi yaitu viskositas dan gel strenght. Viskositas agar mencapai 201.6 cps dan kekuatan gel strenght 356.76 g/cm2.

Abalone is one of aquaculture commodity that has a high value including in Indonesia due to its price, taste and nutrition content. Unfortunately there is problem in abalone's transportation process which caused stress and even death. Clove oil can be used as anesthetic agent for abalone to obtain a high survival rate because of its eugenol content. This research tried to evaluate the the effect of clove oil as anesthesia agent to determined induction time, survival rate and oxygen cosumption in H squamata. This study used an experimental method and used a completely randomized design with treatment concentration of clove oil solution were 0.5 ml/L (A), 0.7 ml/L (B), 0.9 ml/L (C), and 1.1 ml/L (D) which each treatment was repeated three times, and calculated the value of the abalone (H. Squamata) survival rate after maintenance for 14 days. The results of the study showed that the survival rate of abalone seeds obtained in the treatment with the concentration of 1.1 ml/L (D). In the treatment also showed the fastest induction time with 96.67 seconds. The lowest oxygen comsumption rate in this study was treatment D with concentration of 1,1 ml/L. It could be concluded that using clove oil with concentration of 1.1 ml/L as anasthesic compound for abalone showed effectiveness in induction time, survival rate, and oxygen consumption rate.

Waduk Joto merupakan waduk yang berada di Kabupaten Lamongan yang biasa digunakan oleh masyarakat sekitar untuk aktifitas sehari-hari. Selain itu aliran air waduk juga digunakan untuk kegiatan perikanan dan pertanian. Dalam pengelolaan suatu perairan yang lestari dan berkelanjutan diperlukan informasi dasar mengenai tingkat kesuburan perairan guna pemanfaatan yang tepat. Penelitian ini bertujuan untuk mengetahui kualitas air dan status kesuburan perairan di Waduk Joto Kabupaten Lamongan. Metode pengumpulan data menggunakan purposive random sampling pada tiga stasiun yaitu bagian inlet, tengah, dan outlet. Penentuan status kesuburan perairan berdasarkan perhitunganmenggunakan Carlson Trophic State Index (TSI). Pengambilan sampel air dilakukan dengan interval waktu satu bulan sekali selama 3 bulan pada bulan Desember 2020 sampai Februari 2021. Parameter yang diamati meliputi suhu, kecerahan, pH, salinitas, oksigen terlarut (DO), nitrat, total fosfat, klorofil-a. Hasil penelitian menunjukkan bahwa status kesuburan perairan Waduk Joto pada bulan Desember 2020 – Februari 2021 berdasarkan TSI Carlson termasuk dalam kategori perairan hipereutrofik dengan nilai sebesar 74. Disarankan untuk melakukan penelitian lanjutan pada musim yang berbeda untuk mengetahui status kesuburan perairan di musim kemarau.

Sutchi Catfish is one of the important fish commodities in Indonesia. Unfortunately, its seasonal spawning pattern causes limited supply. Cryopreservation is a solution to solve limited supply since it can store the spermatozoa in low temperature so that physiological, biological and morphological functions still remain. Improving the quality of cryopreservation is important to increase the success of Sutchi Catfish aquaculture. Adding honey in cryopreservation process is expected to increase the quality of spermatozoa since it contains with sugars as a source of spermatozoa's energy. This study tried to compare the effectivity of honey in cryopreservation process with no addition. The treatments used in this study were T1 (0% honey), T2 (0.2% of honey), T3 (0.4% of honey), T4 (0.6% of honey) and T5 (0.8% of honey). 30 days after stored, the spermatozoa were checked their motility, viability, abnormality, fertility and hatching rate. This study showed that honey addition could increase the motility significantly (P<0.01) to 23.14% better than control. The viability increased significantly (P<0.01) to 23.17% better than control. The abnormality test did not show significant difference between honey addition and control although the abnormality value in control was the highest (10.75%). The fertilization rate increased significantly (P<0.01) to 28.85% better than control. The hatching rate increased significantly (P<0.01) to 29.78% better than control. The success of all test indicated that the addition of honey in cryopreservation process of spermatozoa could be performed on Sutchi Catfish to increase its production even though the limited spawning pattern.

The fish cultivation system in several villages in Kalitengah District uses an overtime system, namely a fish cultivation system that is carried out within 1 year (12 months) without passing rice planting. The research objective was to determine the abundance of plankton and the status of water quality fish cultivation “sawah tambak” with overtime system in Kalitengah District Lamongan. This is a quantitative research using descriptive methods. Based on the plankton abundance value at Station 1,2 and 3, the waters in the overtime system of ponds are in the Eutrooph category, with the abundance value > 12,000 Ind / L. Meanwhile station 4,5, and 6 are included in the Oligotrooph category since its abundance <10,000 Ind / L. The diversity value is within the range of 0.714267-1.823 which include in the category of small diversity and low community stability because the value of 0 <H '<1.5. All stations are in a moderate level of pollution which the diversity index value is within the range of 1 <H '<3. The Dominance Index (D) is in the range 0.212-1.224, Station 1 has a high dominance value because of the dominant species, namely Batrachospermum. Water quality parameters at all stations such asthe temperature ranges between 28.8-34.2 0C; the pH 8.5-9.2; Dissolved oxygen  4-10.44 mg / l; ammonia 0.009-0.17 mg / l; phosphate ranges from 0.025-2.3 mg / l. From the measurement results, water quality parameters show a good value for the growth of aquatic organisms.