Jurnal Aquatik

Pengaruh perbedaan kadar salinitas terhadap daya tetas telur tiram mutiara (Pinctada maxima) di Teluk Kupang

Wolfhelmus A Mandosa — 2023-10-16

Pearl oysters (Pinctada maxima) are one of the favorite marine species with very potential selling value. P. maxima in Indonesian waters is known to produce quite large pearls. In the breeding process, temperature and salinity are the main factors in egg hatching. Therefore, the aim of this research is to determine the effect of differences in salinity levels on the hatchability of mutiata oyster (P. maxima) eggs in Kupang Bay. This research was carried out using a Completely Randomized Design (CRD) method, where there were 3 treatments, namely 28 ppt, 31 ppt, 34 ppt, with 3 replications. The results obtained were that the use of different salinities had no significant effect on egg hatchability. However, based on research results, the highest value was 31 ppt salinity with a value of 66.10%.

Tepung rumput laut Sargassum sp. sebagai pakan tambahan bagi ikan kerapu cantang (Epinephelus fuscoguttatus-lanceolatus)

Ina Damilna Tosi — 2023-10-16

Cantang grouper (E. fuscoguttatus-lanceolatus) is a fish commodity with high economic value. Sargassum sp seaweed is a high source of nutrition because it contains protein, carbohydrates, fat in small quantities and ash content consisting of salt, sodium and potassium. This study aims to show how Sargassum sp is given and test how much the dose of Sargassum sp administration on the growth rate of grouper. The research was carried out from November 2021 to January 2022 at the Undana fishery pond, Semau. The results showed that different doses of Sargassum sp had a significant difference in influence on growth but did not have a difference in the effect on the survival of cantang grouper. The best dose applied in this study was 10% which was able to produce mitlak growth of 41.11 cm. However, the long growth of cantang grouper has no real effect.

Kombinasi keong mas dan ikan rucah sebagai pakan kepiting bakau (Scylla serrata)

Bagoes Novandi — 2023-10-16

Mud crab (S. serrata) is known as a fishery commodity with high economic value. Mangrove crabs are naturally omnivorous, eating various types of organisms that live in the mangrove ecosystem such as decaying leaves, algae, roots, nuts, toads, snails, shrimps, clams, dead animals and fish. This study used gold snail combined with ikan rucah as feed to determine the percentage of the best combination in feed on the growth and survival of mangrove crabs (S. serrata). A completely randomized design was used and consisted of three treatments and three replicates, namely the provision of gold snail and small fish with a percentage ratio: (a) 25:75, (b) 50:50 and (c) 75:25. The results showed that the highest crab growth (absolute weight) was 46.63 g when fed with gold snail and fish waste in the ratio of 25:75 while the growth in the 50:50 and 25:75 treatments was only 31.23 g and 31.31 g, respectively. The results of this study then concluded that gold snails can trigger the growth of mud crabs if the portion is less than the main food in the form of fishmeal.

Dampak pemberian daun mangrove avicennia marina (api-api putih) terhadap pertumbuhan teripang pasir (Holothuria scabra) di perairan Hansisi Kabupaten Kupang

Daud Londong — 2023-10-16

. Sand sea cucumbers are known as a basic ingredient for medicines because of their protein content. This can trigger the exploitation of sand sea cucumbers, which will impact fishermen's income. This research aims to determine the effect of giving mangrove leaves and to determine the correct dose on the growth of sand sea cucumbers (Holothuria Scabra). The design of this study used a Completely Randomized Design (CRD), where the treatment given was A. marina (Api-api Putih) mangrove leaves fermented with EM4 at different doses, namely 4 treatments with 3 replications. Treatment A: Feeding Avicennia marina (White api-api) mangrove leaves at a dose of 310 grams/container, Treatment B: Feeding A. marina (White api-api) mangrove leaves at a dose of 320 grams/container, Treatment C: Feeding mangrove leaves A. marina (White fire) dose of 330 grams/container, and Treatment D: Feeding mangrove leaves A. marina (White fire) dose of 340 grams/container. The research results showed that the highest growth was in treatment C with a value of 72 grams, followed by treatment B with a value of 31.66 grams, treatment A 16.66 grams, and treatment D with a value of 6.66 grams as the lowest growth. The results of the anova analysis showed P>0.05% and 0.01%, meaning that the treatment had a real effect. The BNT test results showed that there was a difference between treatment C and treatments A, B and D. Thus, treatment C had optimal weight growth. The results of the average survival percentage of sand sea cucumbers obtained showed that treatments A, B, C and D had similar value results, amounting to 100%. The results of the water quality parameters were obtained, the temperature range was 27-28⁰C, salinity 29-32 ppt, and pH between 7.6-8.0.

Persepsi masyarakat tentang perubahan sosial-ekonomi penyebaran limbah PLTU Bolok terhadap kegiatan budidaya rumput laut di Perairan Kecamatan Kupang Barat

Julio Danilson Da Conceicao — 2023-10-16

This research aims to determine socio-economic perceptions before and after the distribution of Bolok PLTU waste towards seaweed cultivation activities, carried out for 1 month in Kuanheum and Oenaek waters, West Kupang District. Data collection was carried out randomly from 30 respondents in both villages. The results of this research show that the distribution of PLTU Bolok waste has an impact on the socio-economic life of seaweed cultivators. This can be seen from the results of the Paired sample T-test showing a significance value of 0.000 < the 2 tailed significance value of 0.05, which means H0 is rejected and H1 is accepted. Where after social life waste such as cooperative interactions decreased to 63.3%, competition increased to 40%. Conflict increased by 33.45%, the number of cultivators decreased by 96.7%, population migration increased to 30% and farmers switching jobs decreased to 53.4% and children dropping out of school decreased by 10%. Meanwhile, after the waste of economic life, such as the use of personal capital decreased by 50%, loan funds increased by 50%, the use of ropes decreased by 100%, seaweed production decreased by 90%, and income decreased by 100%, production turnover decreased by 83.4% and additional farmer employment decreased by 53.3%

Pengaruh penambahan fermentasi ampas kelapa dan dedak halus (padi) dalam pakan terhadap pertumbuhan ikan bandeng (Chanos chanos)

Renaldo Da Costa — 2023-10-16

Research conducted in the period April to June 2022 at the Oesapa Fish Pond Installation, East Nusa Tenggara Province Maritime and Fisheries Service aims to assess the impact of adding fermented coconut dregs and fine bran to milkfish (Chanos chanos) feed. Another objective is to determine the most effective amount of these two ingredients in milkfish feed. This research used a Completely Randomized Design (CRD) method with 4 treatments and was carried out in triplets. The four treatments tested were as follows: Treatments A, B, C and D respectively, namely providing commercial feed with the addition of a mixture of coconut dregs and fine bran at 0, 20, 30 and 40%. Research shows that treatment D, namely providing commercial feed with the addition of a mixture of coconut dregs and fine bran as much as 40%, provides the best results for the growth of milkfish (C. chanos). The absolute weight growth reached 19.29 g, the survival rate reached 100%, indicating that the milkfish in treatment D had an optimal survival rate. Thus, it can be concluded that the addition of coconut dregs and fine bran as much as 40% in fish food is the most effective dose to increase the survival and growth of milkfish (C. chanos) in this study.

Penggunaan tepung ampas kelapa dan dedak padi dalam pakan untuk meningkatkan laju pertumbuhan dan kelangsungan hidup ikan bandeng (Chanos chanos)

Klemensius L Solo — 2023-10-16

This research has been carried out for 2 months at the Oesapa Beach Fish Seed Center (BBIP), aiming to determine the percentage of coconut pulp flour and rice bran in optimal feed formulations to increase the growth rate and survival of milkfish (Chanos chanos). The experiment used a completely randomized design (CRD) with 3 treatments and 3 replications. The treatments tested were treatment A (addition of 10% coconut dregs flour and 30% rice bran flour), treatment B (addition of 20% coconut dregs flour and 20% rice bran), treatment C (addition of 30% coconut dregs flour and 10% rice bran %) and control k1 (commercial pellets). The results showed that the best feed given in the form of coconut dregs flour and rice bran to milkfish was obtained in treatment B (20% coconut dregs flour and 20% rice bran), giving the highest absolute growth of 25.85 g, survival of 86.66% and FCR of 5.33%.

Pengaruh penggunaan limbah air garam terhadap daya tetas kista artemia salina

Fani Melianti Ndolu — 2023-10-16

Waste refers to materials that are no longer needed and, if not managed properly, can have a negative impact on society. Waste water, both from industry and households (domestic), if not managed properly, can have a negative impact on health. Salt water waste (bittern) is a type of thick liquid that is produced after the salt production process in salt ponds and can be abundant in quantity. Artemia, on the other hand, is a type of natural food that is often used in rearing shrimp and fish larvae, both in marine and fresh water throughout Indonesia. Artemia has high nutritional content, especially protein and amino acids. This study aims to assess the impact of using salt water waste on the hatchability of Artemia salina cysts. This research used a Completely Randomized Design (CRD) with four treatments repeated three times. The results showed that the use of salt water waste had a significant impact on the hatchability of Artemia salina cysts. In certain treatments, the use of 500 ml of salt water waste resulted in the highest hatchability of 7.25%, as found in the control group.

Review: Respon Fisiologis Ikan terhadap Lingkungan Hidupnya

Elya Putri Pane — 2023-10-18

Fish need a specific environment as a habitat to grow and develop. Environmental conditions can change, so this becomes a challenge for fish to maintain homeostasis in the fish's body. Two factors influence the physiological condition of fish, namely internal and external factors. Information regarding fish physiology is needed as one of the factors that are the centre of attention in proper cultivation to support the productivity of commercial fish cultivation. Environmental changes such as pollution significantly affect the physiological condition of fish, and supplementing fish food can also support the fish's body metabolism. This article review study describes important factors that can influence the physiological response of fish and provides three case studies of commercially farmed fish when exposed to toxic substances or the provision of organic substances in feed. The data used is secondary data using journals from previous research and grouping topics regarding environmental factors and case studies on grouper fish in the Serranidae family.

Efek cahaya terhadap pertumbuhan dan mortalitas pada ikan kerapu cantang (Epinephelus fuscoguttatus lanceolatus)

Maya Hama Pati — 2023-10-01

This research aims to determine the effect of different lights on cannibalism in cantang grouper (Epinephelus fuscoguttatus lanceolatus) fry and to find out what types of colors can suppress cannibalism. The test fish used were 36 cantang grouper seeds of the same size, namely 6-8 cm. 3 fish were kept in each unit/research container. The experimental design used RAL with 4 treatments and 3 repetitions. The treatments consisted of treatment A (red light), treatment B (blue light), treatment C (green light) and treatment D (no light). The results of the research show that the influence of different light colors greatly influences fish mortality and growth and treatment B with blue in this study can suppress cannibalism and growth of cantang grouper. Absolute length growth was 1.1 cm in treatment B, and absolute weight growth was 2.2 g in treatment B (blue).