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The Abundance of Bacteria Associated with Intertidal Seaweeds Sargassum sp. and Kappaphycus alvarezii in Ekas Bay Muahiddah, Nuri; Cokrowati, Nunik; Affandi, Rangga Idris; Junaidi, Muhammad; Sumsanto, Muhammad; Dwiyanti, Septiana; Asri, Yuliana; Lumbessy, Salnida Yuniarti
Journal of Fish Health Vol. 4 No. 1 (2024): Journal of Fish Health
Publisher : Aquaculture Department, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jfh.v4i1.4898

This study investigates the abundance and diversity of bacteria associated with two intertidal seaweeds, Sargassum sp. and Kappaphycus alvarezii, in Ekas Bay. Intertidal zones are dynamic environments where seaweeds and their associated microbial communities play crucial roles in ecological processes. Seaweeds host a variety of bacteria that contribute to nutrient cycling, seaweed health, and overall ecosystem function. The primary variable measured in this study was the bacterial abundance, expressed as Colony Forming Units per milliliter (CFU/mL). The conclusion of these findings has positive implications for the environmental health around the floating raft, base stakes, Sargassum sp. and Kappaphycus alverazii. The absence of harmful bacteria supports the sustainability of aquatic ecosystems and can provide positive benefits for the species inhabiting those areas.

Analysis of the Abundance and Diversity of Microplastic Contamination in Ekas Bay Cultivation Areas Sumsanto, Muhammad; Setyono, Bagus Dwi Hari; Asri, Yuliana; Dwiyanti, Septiana
Journal of Fish Health Vol. 4 No. 2 (2024): Journal of Fish Health
Publisher : Aquaculture Department, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jfh.v4i2.4950

Ekas Bay is a semi-enclosed bay and estuary in the southern part of Lombok Island. Ekas Bay has an area of 5,312.68 hectares, although it is not very wide, this bay has its own uniqueness and is relatively protected from waves because it is located inland. In Ekas Bay itself, two river estuaries are found, namely the Awang River Estuary and the Kelongkong River Estuary. The existence of these two river estuaries has a negative impact on the condition of the waters of Ekas Bay because residue from household activities is carried away by the river current, one of which is plastic waste. The presence of microplastics on ocean coasts has a negative impact on sea water quality and the life of marine biota, microplastics cannot evaporate or degrade by themselves, microplastics will accumulate in sea water and the body parts of marine biota. This research aims to identify the type and abundance of microplastics in the Ekas Bay floating net cage area and the results obtained in water samples were that the abundance of microplastics at point A was 49.44 par/L, point B was 55.76 par/L and point C was 40.40 par /L. The abundance of microplastics in sediment samples at point A was 12.25 par/L, point B was 10.8 par/L and point C was 11.01 par/L.

Evaluation of the Ca-Mg Mineral Ratio in the Media Cultivation on the Growth Performance of Freshwater Prawns (Macrobrachium rosenbergii) Alim, Sahrul; Atmawinata, Lalu Mukhtar; Dwiyanti, Septiana; Asri, Yuliana
Journal of Fish Health Vol. 4 No. 4 (2024): Journal of Fish Health
Publisher : Aquaculture Department, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jfh.v4i4.5959

Freshwater prawn (Macrobrachium rosenbergii) is a freshwater species which intensively cultivated. Calcium (Ca) and magnesium (Mg) are crucial factors supporting the biological and physiological activities of freshwater prawns. The presence of calcium and magnesium minerals in the environment is utilized by the prawns, especially after the molting process. Calcium and magnesium play roles in osmoregulation and the formation of the prawn's carapace. This study aims to determine the optimal ratio of calcium and magnesium minerals to support molting frequency, specific growth rate, survival rate, and feed efficiency.The experimental design used in this research is a completely randomized design (CRD) with five treatments and three replicates. The treatment given consisted of increasing Ca-Mg in the media: A: 30 mg l-1 Ca + 0 mg l-1 Mg (1:0); B: 30 mg l-1 Ca + 15 mg l-1 Mg (1:0.5); C: 30 mg l-1 Ca + 30 mg l-1 Mg (1:1); D: 30 mg l-1 Ca + 45 mg l-1 Mg (1:1.5) and E: 30 mg l-1 Ca + 60 mg l-1 Mg (1:2). Based on the result, treatment C: 30 mg l-1 Ca + 30 mg l-1 Mg (1:1) was found to improve molting frequency, growth rate, feed efficiency and survival rate.

Analysis of Length-Weight Relationship of Mackerel Scad Scad (Decapterus sp.) Landed in Ampenan Fish Market, West Nusa Tenggara Province Dwiyanti, Septiana; Muahiddah, Nuri
Journal of Fish Health Vol. 4 No. 4 (2024): Journal of Fish Health
Publisher : Aquaculture Department, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jfh.v4i4.5961

The catch of fishermen around Ampenan waters is dominated by Mackerel scad and rucah. Fish caught by fishermen around Ampenan waters are usually landed at the Ampenan fish market to be traded. Mackerel scad (Decapterus sp.) is a pelagic fish that lives in groups and is spread out. Mackerel scad (Decapterus sp.) In addition to having a cheap price, Mackerel scad (Decapterus sp.) also has good nutritional value so that Mackerel scad is included in important economic products. The biological aspect in the form of the relationship between length and weight in Ampenan waters is important to study in efforts to manage fisheries in West Nusa Tenggara, especially Ampenan. Efforts to manage fisheries through fisheries biology information related to the relationship between length and weight aim to determine the variation in weight and length of Mackerel scad (Decapterus sp.) individually or in groups as an indicator of the productivity, health and growth conditions of Mackerel scad obtained in these waters. The study was conducted in March 2024 using survey methods and regression analysis. The number of samples used in this study was 50 Mackerel scad (Decapterus sp.) which were taken randomly at the Ampenan fish market. The results of linear regression and graphs of the relationship between the length and weight of Mackerel scad samples (Decapterus sp.) in this study produced a regression equation Y = 0.04855x 2.2973 with a coefficient of determination (r2) of 62% and a b value of 2.29, meaning b <3 which means negative allometric which means that length growth is faster than weight growth.

Silver Barb (Barbonymus gonionotus) Broodstock Maintenance Techniques at the Technical Implementation Unit of the Fish Seed Service Central Aikmel, East Lombok Ardika, Bagus Aditia; Dwiyanti, Septiana
Journal of Fish Health Vol. 5 No. 2 (2025): Journal of Fish Health
Publisher : Aquaculture Department, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jfh.v5i2.6366

The development of the marine and fisheries sector is a mainstay sector to improve the Indonesian economy (Blue Economy), where aquaculture is a fairly productive and growing sub-sector. Not only sea waters, Indonesia also has very good freshwater potential for development based on aquaculture. Silver barb (Barbonymus gonionotus) is a native freshwater fish from Indonesia and is one of the economical consumption fish that is affordable for the community. The data collection techniques used are primary data and secondary data. This technique is carried out by Primary data, namely data obtained in the field from observations during the implementation of research. Primary data can be in the form of direct observation or observation, namely directly observing the activities carried out such as observing fish growth by looking at the increase in length and weight. Secondary data, namely data obtained from various books, journals, statistical data, articles, and others. Maintenance of silver barb broodstock is carried out by preparing the pond first starting from drying, liming, fertilizing, filling with water, then maintaining the broodstock. Maintenance of silver barb broodstock for 28 days resulted in SR (Survival Rate) values for males of 100% and females of 99%, then FCR (feed conversion rate) for males of 1.64 and females of 1.72. Water quality measurements were carried out 5 times a week and the range obtained was temperature 28-32 ⁰C, pH 8–8.6 and DO (Dissolved oxygen) 8–9.7 mg/l.

Spawning Technique of Abalone (Haliotis squamata) Broodstock at Balai Perikanan Budidaya Laut (BPBL) Lombok Aini, Kuratul; Dwiyanti, Septiana
Journal of Fish Health Vol. 5 No. 2 (2025): Journal of Fish Health
Publisher : Aquaculture Department, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jfh.v5i2.6411

Abalone is one of the species of the Gastropoda class. There are 7 types of abalone that are spread throughout Indonesian waters, including Haliotis asinina, H. varia, H. squamata, H. ovina, H. glabra, H. planate and H. crebrisculpta. Abalone Haliotis squamata is one of the abalone species that is cultivated at Balai Perikanan Budidaya Laut (BPBL) Lombok. The abalone breeding technique at BPBL Lombok is carried out massively with a ratio of male and female abalone breeders of 1:3. The success rate of abalone breeding is determined by the level of gonad maturity, water quality, irradiation period as well as the length and weight of the abalone body. Abalone breeding begins with container preparation by adding 300 chlorinated limes (kaporit). Abalone breeders are maintained by placing them in a 300 x 80 x 80 cm fiber tank containing four baskets, three baskets containing female abalones and one basket containing male abalones. The feed given to abalone breeders is Gracilaria sp. and Ulva sp., while the feed for larvae is Nitzchia sp. feed. Abalone breeding begins with breeder selection. Breeders used are those that have mature gonads or gonads that have entered TKG 3 which are marked by gonad size larger than the shell. Abalone breeders must be over 4 cm in size and free from disease and. Abalone breeding is marked by the presence of a fishy smell and cloudy water in the container. The number of eggs produced from mass breeding is 1,041,600 grains.

The Abundance of Bacteria Associated with Intertidal Seaweeds Sargassum sp. and Kappaphycus alvarezii in Ekas Bay Muahiddah, Nuri; Cokrowati, Nunik; Affandi, Rangga Idris; Junaidi, Muhammad; Sumsanto, Muhammad; Dwiyanti, Septiana; Asri, Yuliana; Lumbessy, Salnida Yuniarti
Journal of Fish Health Vol. 4 No. 1 (2024): Journal of Fish Health
Publisher : Aquaculture Department, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jfh.v4i1.4898

This study investigates the abundance and diversity of bacteria associated with two intertidal seaweeds, Sargassum sp. and Kappaphycus alvarezii, in Ekas Bay. Intertidal zones are dynamic environments where seaweeds and their associated microbial communities play crucial roles in ecological processes. Seaweeds host a variety of bacteria that contribute to nutrient cycling, seaweed health, and overall ecosystem function. The primary variable measured in this study was the bacterial abundance, expressed as Colony Forming Units per milliliter (CFU/mL). The conclusion of these findings has positive implications for the environmental health around the floating raft, base stakes, Sargassum sp. and Kappaphycus alverazii. The absence of harmful bacteria supports the sustainability of aquatic ecosystems and can provide positive benefits for the species inhabiting those areas.

Analysis of the Abundance and Diversity of Microplastic Contamination in Ekas Bay Cultivation Areas Sumsanto, Muhammad; Setyono, Bagus Dwi Hari; Asri, Yuliana; Dwiyanti, Septiana
Journal of Fish Health Vol. 4 No. 2 (2024): Journal of Fish Health
Publisher : Aquaculture Department, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jfh.v4i2.4950

Ekas Bay is a semi-enclosed bay and estuary in the southern part of Lombok Island. Ekas Bay has an area of 5,312.68 hectares, although it is not very wide, this bay has its own uniqueness and is relatively protected from waves because it is located inland. In Ekas Bay itself, two river estuaries are found, namely the Awang River Estuary and the Kelongkong River Estuary. The existence of these two river estuaries has a negative impact on the condition of the waters of Ekas Bay because residue from household activities is carried away by the river current, one of which is plastic waste. The presence of microplastics on ocean coasts has a negative impact on sea water quality and the life of marine biota, microplastics cannot evaporate or degrade by themselves, microplastics will accumulate in sea water and the body parts of marine biota. This research aims to identify the type and abundance of microplastics in the Ekas Bay floating net cage area and the results obtained in water samples were that the abundance of microplastics at point A was 49.44 par/L, point B was 55.76 par/L and point C was 40.40 par /L. The abundance of microplastics in sediment samples at point A was 12.25 par/L, point B was 10.8 par/L and point C was 11.01 par/L.

Evaluation of the Ca-Mg Mineral Ratio in the Media Cultivation on the Growth Performance of Freshwater Prawns (Macrobrachium rosenbergii) Alim, Sahrul; Atmawinata, Lalu Mukhtar; Dwiyanti, Septiana; Asri, Yuliana
Journal of Fish Health Vol. 4 No. 4 (2024): Journal of Fish Health
Publisher : Aquaculture Department, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jfh.v4i4.5959

Freshwater prawn (Macrobrachium rosenbergii) is a freshwater species which intensively cultivated. Calcium (Ca) and magnesium (Mg) are crucial factors supporting the biological and physiological activities of freshwater prawns. The presence of calcium and magnesium minerals in the environment is utilized by the prawns, especially after the molting process. Calcium and magnesium play roles in osmoregulation and the formation of the prawn's carapace. This study aims to determine the optimal ratio of calcium and magnesium minerals to support molting frequency, specific growth rate, survival rate, and feed efficiency.The experimental design used in this research is a completely randomized design (CRD) with five treatments and three replicates. The treatment given consisted of increasing Ca-Mg in the media: A: 30 mg l-1 Ca + 0 mg l-1 Mg (1:0); B: 30 mg l-1 Ca + 15 mg l-1 Mg (1:0.5); C: 30 mg l-1 Ca + 30 mg l-1 Mg (1:1); D: 30 mg l-1 Ca + 45 mg l-1 Mg (1:1.5) and E: 30 mg l-1 Ca + 60 mg l-1 Mg (1:2). Based on the result, treatment C: 30 mg l-1 Ca + 30 mg l-1 Mg (1:1) was found to improve molting frequency, growth rate, feed efficiency and survival rate.

Analysis of Length-Weight Relationship of Mackerel Scad Scad (Decapterus sp.) Landed in Ampenan Fish Market, West Nusa Tenggara Province Dwiyanti, Septiana; Muahiddah, Nuri
Journal of Fish Health Vol. 4 No. 4 (2024): Journal of Fish Health
Publisher : Aquaculture Department, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jfh.v4i4.5961

The catch of fishermen around Ampenan waters is dominated by Mackerel scad and rucah. Fish caught by fishermen around Ampenan waters are usually landed at the Ampenan fish market to be traded. Mackerel scad (Decapterus sp.) is a pelagic fish that lives in groups and is spread out. Mackerel scad (Decapterus sp.) In addition to having a cheap price, Mackerel scad (Decapterus sp.) also has good nutritional value so that Mackerel scad is included in important economic products. The biological aspect in the form of the relationship between length and weight in Ampenan waters is important to study in efforts to manage fisheries in West Nusa Tenggara, especially Ampenan. Efforts to manage fisheries through fisheries biology information related to the relationship between length and weight aim to determine the variation in weight and length of Mackerel scad (Decapterus sp.) individually or in groups as an indicator of the productivity, health and growth conditions of Mackerel scad obtained in these waters. The study was conducted in March 2024 using survey methods and regression analysis. The number of samples used in this study was 50 Mackerel scad (Decapterus sp.) which were taken randomly at the Ampenan fish market. The results of linear regression and graphs of the relationship between the length and weight of Mackerel scad samples (Decapterus sp.) in this study produced a regression equation Y = 0.04855x 2.2973 with a coefficient of determination (r2) of 62% and a b value of 2.29, meaning b <3 which means negative allometric which means that length growth is faster than weight growth.

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