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Site Selection for Lobster Culture in Floating Cage using Multi-criteria Analysis Muhammad Junaidi; Nanda Diniarti; Nunik Cokrowati; Alis Mukhlis; Baiq Hilda Astriana; Flaxen D. L. Conway
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 27, No 4 (2022): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ik.ijms.27.4.315-329

Spiny lobster is as a very promising culture commodity to be developed due to their high demand in the domestic and global markets. The selection of the suitable location was one of determining factors for the success of lobster cultivation. Various criteria are required for the location of lobster cultivation, both technically and biologically. This research aimed to analyze the suitability sites for lobster culture in floating cages using Multi-criteria Analysis and Geographic Information System (GIS). The research was conducted in May 2018 in North Lombok Regency Water, West Nusa Tenggara. A survey method was applied and used primary and secondary data. Data collected were grouped into 3 categories i.e. oceanographic parameter (water depth, current, wave, and transparency), water quality (temperature, salinity, pH, dissolved oxygen, nitrate, and phosphate), and socio-economic and institutional parameters (legality, easy access, labor availability, and market). Primary data were obtained by measuring oceanography and water quality parameters at 23 observation points on eight transects perpendicular to the coast. Socio-economic and institutional data were obtained from the relevant agencies. Data analysis was done by combining Multi-criteria Analysis and GIS. The result of this research shows that the water condition still supports mariculture activity. The total area covered by this research was 9,087 ha, of which 1,226 ha were found very suitable for lobster culture using floating cage.

The Effect of Different Substrates on Laboratory Scale Cultivation of Kappaphycus alvarezii Muhammad Heri Hariadi; Nunik Cokrowati; Mukammad Marzuki
Jurnal Natur Indonesia Vol 21, No 2 (2023): October
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jnat.21.2.100-108

Seaweed is a leading commodity in the Indonesian fisheries sector. Indonesia is the second largest seaweed-producing country in the world after China. K.alvarezii is a type of seaweed that produces kappa carrageenan which can be used as a raw material in industry, making K.alvarezii seaweed very popular for cultivation. Cultivation of K.alvarezii seaweed has developed widely in Indonesian waters. The success of cultivating K.alvarezii seaweed can be achieved if it is supported by a suitable environment for its growth. One of the environmental aspects that influences the growth of K.alvarezii seaweed is the bottom substrate of the waters. This research aims to analyze the best substrate for the survival rate of brown K.alvarezii seaweed cultivated on a laboratory scale. This research used an experimental method using a Completely Randomized Design (CRD) consisting of 4 treatments and each treatment was carried out 3 times to obtain 12 experimental units. The treatments tested were different substrates consisting of sand, coral, volcanic rock, and coral sand. The results of the research show that different types of substrate have a real influence on the survival rate of brown K.alvarezii seaweed cultivated on a laboratory scale. Coral substrate gave the best results with a survival rate of 100%, final weight of 20 g, and carrageenan yield value of 26%.

Seaweed Diversity at Muluk Beach, Sengkol Village, Pujut Sub-District, Central Lombok Regency, Nusa Tenggara Barat Nunik Cokrowati; Nur Yatin; Jayusri Jayusri; Muhammad Jum'at; Salnida Yuniarti Lumbessy; Wiyat Zahroh Sepia Utami
Jurnal Natur Indonesia Vol. 22 No. 1 (2024): April
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LPPM) Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jnat.22.1.57-67

Seaweed can produce compounds that have diverse biological activities, including antioxidants. These compounds can be used in food, food sources, and medicines. This study aimed to analyze the types of seaweed that grow wild in the waters of Muluk Beach. The research was conducted at Muluk Beach, Sengkol Village, Pujut District, Central Lombok Regency. The research methods used in this study were survey methods and laboratory experiments. The results explained that the type of wild seaweed that grows in the waters of Muluk Beach is Padina sp, Gracilaria coronopifolia, Sargassum cristaefolium, Gracilaria sp, Caulerpa taxifolia, C. taxifolia, Ulva intestinalis, Halimeda opuntia, Ulva sp, Codium, H.tuna, G.salicornia, G.verrucosa, and Acanthopora. The type with the highest antioxidant content is Padina sp, which is 81,31% and has 14,39 mg/L chlorophyll-a levels. The species with the lowest antioxidant content was H.opuntia at 1,79% and chlorophyll at 8,83 mg/L

The Effect of Different Substrates on Laboratory Scale Cultivation of Kappaphycus alvarezii Muhammad Heri Hariadi; Nunik Cokrowati; Muhammad Marzuki
Jurnal Natur Indonesia Vol. 21 No. 2 (2023): October
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LPPM) Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/

Seaweed is a leading commodity in the Indonesian fisheries sector. Indonesia is the second largest seaweed-producing country in the world after China. K.alvarezii is a type of seaweed that produces kappa carrageenan which can be used as a raw material in industry, making K.alvarezii seaweed very popular for cultivation. Cultivation of K.alvarezii seaweed has developed widely in Indonesian waters. The success of cultivating K.alvarezii seaweed can be achieved if it is supported by a suitable environment for its growth. One of the environmental aspects that influences the growth of K.alvarezii seaweed is the bottom substrate of the waters. This research aims to analyze the best substrate for the survival rate of brown K.alvarezii seaweed cultivated on a laboratory scale. This research used an experimental method using a Completely Randomized Design (CRD) consisting of 4 treatments and each treatment was carried out 3 times to obtain 12 experimental units. The treatments tested were different substrates consisting of sand, coral, volcanic rock, and coral sand. The results of the research show that different types of substrate have a real influence on the survival rate of brown K.alvarezii seaweed cultivated on a laboratory scale. Coral substrate gave the best results with a survival rate of 100%, final weight of 20 g, and carrageenan yield value of 26%.

Wild Seaweed at Kerandangan Senggigi Beach, Batu Layar District, West Lombok Regency Nunik Cokrowati; Nur Yatin; Jayusri Jayusri; Irika Devi Anggraini
Jurnal Natur Indonesia Vol. 22 No. 2 (2024): October
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LPPM) Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jnat.22.2.84-91

Seaweed algae is a type of marine plant classified as benthic macroalgae and mostly lives on the bottom of the water. Algae are seaweeds that live in the sea and belong to the thallophyta group. Seaweed contains many nutrients such as carbohydrates, vitamins, fats, minerals, and others that have great potential for development in various industries. As a maritime country, Indonesia has potential coastal and marine natural resources that can be utilized to improve the welfare of coastal communities. Seaweed is one of the many coastal and marine natural resources found along the coast of the Indonesian oceans. West Nusa Tenggara (NTB) is one of the seaweed-producing areas. One of the areas that can be seen is seaweed, especially wild seaweed, in the Senggigi area, Batu Layar District, West Lombok, precisely on Kerandangan Beach. This study aimed to analyze the types of seaweed and the phytochemical content of seaweed growing on Kerandangan Beach, Senggigi, West Lombok. This study uses the purposive sampling method by taking samples that are considered representative of the research location, which is done by taking samples randomly based on the boundaries of the area that has been determined. The results of this study are There are several types of seaweed in Kerandangan Beach Borgesenia forbesii, Corallina, Gelidium, Caulerpa taxifolia, Padina, Chondrus crispus, Sargassum cristaefolium, Galaxaura rugosa, Acanthopora spicifera, Ulva intestinalis, Halimeda opuntia, and Turbinaria decurrens. This research concludes that the type with the highest antioxidant content is Padina sp., which is 81.31% and has a chlorophyll content of 14.39 mg/L.

Wild Seaweed at Kerandangan Senggigi Beach, Batu Layar District, West Lombok Regency Nunik Cokrowati; Nur Yatin; Jayusri Jayusri; Irika Devi Anggraini
Jurnal Natur Indonesia Vol. 22 No. 2 (2024): October
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jnat.22.2.84-91

SeaweedAlgae is a type of marine plant classified as benthic macroalgae and mostly lives on the bottom of the water. Algae are seaweeds that live in the sea and belong to the thallophyta group. Seaweed contains many nutrients such as carbohydrates, vitamins, fats, minerals, and others that have great potential for development in various industries. As a maritime country, Indonesia has potential coastal and marine natural resources that can be utilized to improve the welfare of coastal communities. Seaweed is one of the many coastal and marine natural resources found along the coast of the Indonesian oceans. West Nusa Tenggara (NTB) is one of the seaweed-producing areas. One of the areas that can be found is seaweed, especially wild seaweed, in the Senggigi area, Batu Layar District, West Lombok, precisely on Kerandangan Beach. This study aimed to analyze the types of seaweed and the phytochemical content of seaweed growing on Kerandangan Beach, Senggigi, West Lombok. This study uses the purposive sampling method by taking samples that are considered representative of the research location, which is done by taking samples randomly based on the boundaries of the area that has been determined. The results of this study are There are several types of seaweed in Kerandangan Beach Borgesenia forbesii, Corallina, Gelidium, Caulerpa taxifolia, Padina, Chondrus crispus, Sargassum cristaefolium, Galaxaura rugosa, Acanthopora spicifera, Ulva intestinalis, Halimeda opuntia, and Turbinaria decurrens. This research concludes that the type with the highest antioxidant content is Padina sp., which is 81.31% and has a chlorophyll content of 14.39 mg/L.

Seaweed Diversity at Muluk Beach, Sengkol Village, Pujut Sub-District, Central Lombok Regency, Nusa Tenggara Barat Nunik Cokrowati; Nur Yatin; Jayusri Jayusri; Muhammad Jum’at; Salnida Yuniarti Lumbessy; Wiyat Zahroh Sepia Utami
Jurnal Natur Indonesia Vol. 22 No. 1 (2024): April
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jnat.22.1.57-67

Seaweed can produce compounds that have diverse biological activities, including antioxidants. These compounds can be used in food, food sources, and medicines. This study aimed to analyze the types of seaweed that grow wild in the waters of Muluk Beach. The research was conducted at Muluk Beach, Sengkol Village, Pujut District, Central Lombok Regency. The research methods used in this study were survey methods and laboratory experiments. The results explained that the type of wild seaweed that grows in the waters of Muluk Beach is Padina sp, Gracilaria coronopifolia, Sargassum cristaefolium, Gracilaria sp, Caulerpa taxifolia, C. taxifolia, Ulva intestinalis, Halimeda opuntia, Ulva sp, Codium, H.tuna, G.salicornia, G.verrucosa, and Acanthopora. The type with the highest antioxidant content is Padina sp, which is 81,31% and has 14,39 mg/L chlorophyll-a levels. The species with the lowest antioxidant content was H.opuntia at 1,79% and chlorophyll at 8,83 mg/L.

The Effect of Different Substrates on Laboratory Scale Cultivation of Kappaphycus alvarezii Muhammad Heri Hariadi; Nunik Cokrowati; Muhammad Marzuki
Jurnal Natur Indonesia Vol. 21 No. 2 (2023): October
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jnat.21.2.100-108

Seaweed is a leading commodity in the Indonesian fisheries sector. Indonesia is the second largest seaweed-producing country in the world after China. K.alvarezii is a type of seaweed that produces kappa carrageenan which can be used as a raw material in industry, making K.alvarezii seaweed very popular for cultivation. Cultivation of K.alvarezii seaweed has developed widely in Indonesian waters. The success of cultivating K.alvarezii seaweed can be achieved if it is supported by a suitable environment for its growth. One of the environmental aspects that influences the growth of K.alvarezii seaweed is the bottom substrate of the waters. This research aims to analyze the best substrate for the survival rate of brown K.alvarezii seaweed cultivated on a laboratory scale. This research used an experimental method using a Completely Randomized Design (CRD) consisting of 4 treatments and each treatment was carried out 3 times to obtain 12 experimental units. The treatments tested were different substrates consisting of sand, coral, volcanic rock, and coral sand. The results of the research show that different types of substrate have a real influence on the survival rate of brown K.alvarezii seaweed cultivated on a laboratory scale. Coral substrate gave the best results with a survival rate of 100%, final weight of 20 g, and carrageenan yield value of 26%.

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