Distribusi  Kerang Geloina sp. (Bivalvia: Corbiculidae) di Kawasan Mangrove Segara Anakan, Cilacap

Segaraanakan merupakan salah satu estuaria terbesar di Pulau Jawa yang terkenal dengan keanekaragaman hayatinya. Diantara biota yang terdapat adalah kerang totok (Geloina sp) yang berasosiasi dengan hutan mangrove. Karena memiliki nilai ekonomis maka selalu di tangkap. Maka dari itu sangat tepat jika kerang tersebut dipelajari ekologis maupun biologisnya. Tujuan dari penelitian ini adalah untuk mengetahui distribusi dan stuktur populasi kerang Geloina sp tersebut. Penelitian dilakukan di Segaraakan Cilacap pada empat stasiun yang berbeda salinitasnya (13, 15, 30 dan 32 ppt). Sifat penelitian adalah studi kasus, metoda pengambilan sampel yang digunakan adalah metoda sampling area. Data yang diambil meliputi kerang dan kondisi perairan. Data yang didapatkan dikelompokan berdasarkan kelas ukuran panjang cangkang selanjutnya dilakukan uji chi kwadrat untuk menentukan pola sebaran.Hasil penelitian menunjukan kerang yang didapat adalah G. erosa dengan pola sebaran merata pada keempat stasiun penelitian yang berbeda salinitasnya. Adapun kepas ukuran kerang yang didapat dalam keempat stasiun dapat dikelompokan menjadi kelas ukuran <3, 3 – 3,9, 4 – 4,9, 5 – 5,9, 6 – 6,9, 7 – 7,9, .>8 cm. Populasi kerang terbanyak pada semua stasiun adalah kelas ukuran 6 – 6,9 cmKata Kunci : Segara anakan, Geloina sp, salinitasSegera anakan is the widest estuaries in Java Island and the famous high diversity. One of fauna found which associate with the mangroves was totok mussel Geloina sp. That mussel had economic value so that faced high exploited along season. Considering that condition a study of distribution and their population structure was very importance. The research was carried out on Segaraanakan Cilacap on different station which had different salinity (13, 15, 30 and 32 ppt). The case study type research and sampling area method was used to collect the data of information of the Geloina sp. The data collected in the field was mussel population and water quality condition where the mussel life. The data of mussel was grouping in several length of class and following chi quadrant test to define the distribution of Geloina sp. The result of the study showed, Thad the Geloina sp was uniform distribute along the fourth station which had different salinity and the length of class mussel was found <3, 3 – 3,9, 4 – 4,9, 5 – 5,9, 6 – 6,9, 7 – 7,9, .>8 cm. The class length of 6 – 6,9 cm was the highs number of mussel class on forth station in SegaraanakanKeywords : Segara anakan, Geloina sp, salinity

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Hubungan Sebaran Kerang Totok Geloina sp. (Bivalvia: Corbiculidae) dengan Vegatasi Mangrove di Ujung Alang Segara Anakan Cilacap Jawa Tengah

Jurnal Kelautan Tropis ◽

10.14710/jkt.v19i2.838 ◽

2016 ◽

Vol 19 (2) ◽

pp. 115

Author(s):

Chrisna Adhi Suryono

Keyword(s):

Water Quality ◽

Economic Value ◽

Sampling Area ◽

Area Method ◽

Water Quality Condition ◽

Study Type ◽

High Diversity ◽

Area Data

Segera Anakan is the widest estuaries in Java Island and the famous high diversity. One of fauna found which associate with the mangroves was totok mussel Geloina sp. That mussel had economic value so that faced high exploited along season. Considering that condition a study of the correlation between Geolina distribution and the mangroves vegatiaon. The research was carried out at Ujung Alang areas in Segara Anakan Cilacap on different station which had different mangroves abbundancas. The case study type research and sampling area method was used to collect the data of information of the Geloina sp. The data collected in the field was mussel and mangroves population and water quality condition. The result of the study showed, Thad the Geloina sp was uniform distribute along the fourth station which had different diversity and numbers of mangrove. The class length of 6 – 6,9 cm was the highs number of mussel class on forth station in Ujung Alang Segara Anakan Cilacap Keywords: Segara Anakan, Geloina sp, Mangrove Segara Anakan merupakan salah satu estuaria terbesar di Pulau Jawa yang terkenal dengan keanekaragaman hayatinya. Diantara biota yang terdapat adalah kerang totok (Geloina sp) yang berasosiasi dengan hutan mangrove. Karena memiliki nilai ekonomis maka menjadi target penangkapan. Maka dari itu sangat tepat jika mempelajiti hubungan antara sebaran kerang Totok Geloina terhadap vegetasi mangrove. Penelitian dilakukan di Ujung Alang Segara Anakan di Cilacap pada empat stasiun yang berbeda lokasinya. Sifat penelitian adalah studi kasus, metoda pengambilan sampel yang digunakan adalah metoda sampling area. Data yang diambil meliputi kerang, manrove dan kondisi perairan setempat. Hasil penelitian menunjukan kerang totok Geloina yang didapat tidak terpengaruh oleh vegetasi mangrove baik jenis maupun jumlah pohon. Populasi kerang terbanyak pada semua stasiun adalah kelas ukuran 6 – 6,9 cm di Ujung Alang Seagara Anakan Cilacap Kata Kunci : Segara Anakan, Geloina sp, Mangrove

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Analisis Kondisi Kualitas Air Pada Budidaya Ikan Kerapu Tikus (Cromileptes altivelis) Di Situbondo [Analysis Of Water Quality Conditions On Humpback Grouper Culture (Cromileptes altivelis) In Situbondo]

Jurnal Ilmiah Perikanan dan Kelautan ◽

10.20473/jipk.v5i1.11414 ◽

2019 ◽

Vol 5 (1) ◽

pp. 1

Author(s):

Ervany Eshmat N, Abdul Manan

Keyword(s):

Water Quality ◽

Dissolved Oxygen ◽

Water Temperature ◽

Economic Value ◽

International Markets ◽

Fish Culture ◽

Quality Analysis ◽

Local Market ◽

Descriptive Method

Abstract The humpback grouper (Cromileptes altivelis) is one of the fishery commodities with high economic value in both local and international markets. The price of humpback grouper can reach Rp. 200,000 - Rp. 400,000 / kilogram in the local market. The humpback grouper is potentially to be developed in most coastal areas of Indonesia. The conditions of water quality have a very important role for the success of fish culture of humpback grouper. To that end, monitoring and management of water quality are necessary in fish culture. The purpose of this case study is to determine the water quality conditions on humpback grouper culture in BBAP, Situbondo. The study was conducted on 16 January until 16 February 2012. The study method use descriptive method. From the results of water quality analysis, the water in humpback grouper broodstock ponds (I1 and I2) is no smell, no colour water, temperature 26.1-30 oC, salinity 27-35 ppt, dissolved oxygen 3.3-3.9 ppm, ammonia levels <0.001-0.22 ppm, nitrite levels 0.0075-0.085 ppm, alkalinity 110-120 ppm and pH 7.94-8.18. The water in humpback grouper hatchery ponds (B1 and B2) is no smell, green colour water, temperature 26.7-29.3 oC, salinity 27-34 ppt, dissolved oxygen 2.7-3.7 ppm, ammonia levels 0.0781-0.28 ppm, nitrite levels 0.0225-3.3305 ppm, alkalinity 94-126 ppm, and pH 7.14-7.81.

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Eficácia da Cobrança pelo Uso de Recursos Hídricos condicionada ao Índice de Qualidade da Água: Estudo de Caso, Minas Gerais, Brasil

Revista Brasileira de Geografia Física ◽

10.26848/rbgf.v14.1.p266-280 ◽

2021 ◽

Vol 14 (1) ◽

pp. 266

Author(s):

Cíntia Maria Ribeiro Vilarinho ◽

Marcelo Gonzaga Muller ◽

Aline Souza Cavalcante ◽

Mariana Morales Leite Costa ◽

José Augusto Costa Gonçalves

Keyword(s):

Water Quality ◽

Water Resources ◽

Water Scarcity ◽

Water Quality Index ◽

Quality Index ◽

Economic Value ◽

Minas Gerais ◽

Water Value ◽

Minas Gerais State

Em vários países o preço da água pode e melhorou quantitativa e qualitativamente a distribuição deste recurso. O preço adequado e bem utilizado levou a uma melhor sustentabilidade e conservação da água por meio de regulamentos prescritivos, incluindo até o racionamento de água. O uso de preços para gerenciar a demanda de água é mais econômico do que a implementação de programas de conservação sem preços. No Brasil, através de instrumentos legais, é prevista a cobrança pelo uso dos recursos hídricos, sinalizando pela necessidade do reconhecimento do valor econômico da água associado ao seu uso, ao desenvolvimento sustentável mediante aos desafios da escassez hídrica futura. Para que a cobrança pelo uso da água não se torne um mero mecanismo de arrecadação pública, e devido também, a inexistência de estudos que investiguem e expressem de forma clara os objetivos e finalidades da cobrança em Minas Gerais, esta pesquisa se fez necessária. Desta forma, este trabalho objetivou investigar e avaliar a cobrança pelo uso da água e sua eficácia na melhoria do Índice de Qualidade da Água (IQA) estabelecida pelo órgão gestor. Em Minas Gerais, de 91,67% das Unidades de Planejamento e Gestão de Recursos Hídricos (UPGRHs), onde existe a cobrança instituída, não se constatou uma tendência na melhoria do IQA. Apenas 36,36% das bacias estaduais que cobram pelo uso da água melhoraram os níveis de IQA, enquanto 63,63% pioraram ou não tiveram variação significativa. Charging Effectiveness for the Use of Water Resources conditioned to the Water Quality Index: Case Study, Minas Gerais, Brazil A B S T R A C TIn several countries the price of water can and has improved quantitatively and qualitatively the distribution of the resource. The appropriate and well-used price has led to better sustainability and conservation of water through prescriptive regulations, including even water rationing. Using prices to manage water demand is more economical than implementing price-free conservation programs. In Brazil, through legal instruments, charging for the use of water resources is foreseen, signaling mainly the need to recognize the economic value of water associated with its use, sustainable development through the challenges of future water scarcity. So that, charging for the use of water does not become a mere mechanism for public collection, and also due to the lack of studies that investigate and clearly express the objectives and purposes of charging in Minas Gerais state, this research was necessary. Thus, this study aimed to investigate and evaluate the charge for water use and its effectiveness in improving the Water Quality Index (WQI) established by the managing body. In Minas Gerais, of 91.67% of the Water Resources Planning and Management Units (UPGRHs), where the collection is in place, there was no trend in improving the IQA. Only 36.36% of the state basins that charge for the use of water improved the levels of IQA, while 63.63% worsened or had no significant variation.Keywords: Water scarcity. Water availability. Water Value.

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Biological Assessment of Water Quality in Running Water Using Macroinvertebrates: A Case Study for Limburg, The Netherlands

Water Science & Technology ◽

10.2166/wst.1985.0186 ◽

1985 ◽

Vol 17 (6-7) ◽

pp. 867-878 ◽

Cited By ~ 11

Author(s):

Harry H. Tolkamp

Keyword(s):

Water Quality ◽

The Netherlands ◽

Biological Assessment ◽

Biotic Index ◽

Running Water ◽

Biological Methods ◽

High Diversity ◽

Selection Of

To obtain suitable biological methods for evaluating water quality several methods were applied to the macroinvertebrate composition of streams in the southern region of the province of Limburg (the Netherlands). After evaluation of the results through comparison followed by elimination of unsuitable methods (e.g. Trent Biotic Index, Indice Biotique, Indice de Qualiteé Biologique Globale) four methods remained promising: the Saprobic-index, the Quality-index, the BMWP-aspt and the Chandler-aspt. A further selection of methods must be carried out in combination with a typological classification of the streams concerned, including a description of the achievable range for each method. To this end more research in the field of stream typology is needed, especially for the province of Limburg with its high diversity of streams.

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