Environmental characteristics of mangrove forest in Mojo Village, Pemalang, Central Java as a reference to mud crab Scylla serrata aquasilviculture

Suryani I, Nirmala K, Hastuti YP. 2016. Environmental characteristics of mangrove forest in Mojo Village, Pemalang, Central Java as a reference to mud crab Scylla serrata aquasilviculture. Bonorowo Wetlands 6: 82-91. Mud carb is one of the fisheries commodity that has a high economical value. Production of mud carb still depends on the wild stock for the seed, while the production from aquaculture sector is not well established yet. Aquasilviculture is one of the option to develop aquaculture sector for this commodity. This research aimed to analyze environment characteristics of mangrove forest ecosystem in Mojo Village, Ulujami, Pemalang for aquasilviculture. This research was conducted based on the survey method. The results showed that the best environment characteristics were contained in station 3, with the mud crab production reached 4 kg/day when high catch, and 1.9 kg/day when low catch. From this result, the best environment characteristics of mangrove forests in Mojo village, Ulujami, Pemalang, for mud crab aquasilviculture is environment characteristics in station 3.

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Distribusi Scylla spp. di perairan estuari Sungai Donan Segara Anakan Bagian Timur, Cilacap

Habitus Aquatica ◽

10.29244/haj.2.1.1 ◽

2021 ◽

Vol 2 (1) ◽

Author(s):

Sulistiono Sulistiono ◽

Nurul Musyariafah Yahya ◽

Etty Riani

Keyword(s):

Economic Value ◽

Scylla Serrata ◽

Mangrove Forests ◽

Mud Crab ◽

Mangrove Species ◽

Central Java ◽

Rhizophora Apiculata ◽

Mangrove Ecosystems ◽

Avicennia Alba ◽

Mangrove Crabs

Mangrove forests are ecosystems that make up coastal areas and river estuaries. The examples of mangrove ecosystems found in Indonesia are in Segara Anakan, Central Java. One of the aquatic biota with the economic value found in the mangrove forest ecosystem is the mud crab (Scylla spp.). The purpose of this study was to assess the distribution of mangrove crabs (Scylla spp.) to the presence of mangrove species in the mouth of the Donan River, Segara Anakan. A sampling of crabs and observations of mangrove vegetation were carried out at five stations spread from the river to the sea. The results showed that there were three types of mangrove crabs caught in the vicinity of the study, namely Scylla tranquebarica, S. olivacea, and S. serrata. The types of mangroves found include Rhizophora apiculata, R. mucronata, Avicennia rumphiana, A. alba, A. officinalis, and Nypa. Regression analysis showed that mangrove density correlated with the abundance of Scylla tranquebarica and Scylla olivacea, but contradicts the abundance of Scylla serrate. PCA analysis showed that the Crab species Scylla tranquebarica and Scylla olivacea were associated with mangroves of Avicennia alba, Avicennia rumphiana, and Rhizophora apiculata. Meanwhile, Scylla serrata crabs are associated with Avicennia officinalis.

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Growth analysis, mortality and exploitation level of Mud Crab Scylla serrata, Forskål 1775, (Malacostraca : Portunidae) in Mangkang Wetan waters, Semarang, Central Java, Indonesia

Jurnal Kelautan Tropis ◽

10.14710/jkt.v23i1.7149 ◽

2020 ◽

Vol 23 (1) ◽

pp. 136 ◽

Cited By ~ 1

Author(s):

Ervia Yudiati ◽

Arumning Tias Fauziah ◽

Irwani Irwani ◽

Agus Setyawan ◽

Insafitri Insafitri

Keyword(s):

Scylla Serrata ◽

Survey Method ◽

Mud Crab ◽

Growth Study ◽

High Demand ◽

Central Java ◽

Reference Information ◽

Exploitation Rate ◽

Over Exploitation ◽

Mud Crabs

Awareness of Mud Crab over exploitation in Mangkang Wetan Waters has been noticed. One of the reference information is the growth study to determine the condition of the mud crab population. High demand encourages the fisherman to catch more, which leads to overexploitation in nature. The study aimed to estimate the growth, mortality, and exploitation rate of mud crabs. The 921 mud crabs samples were collected from Mangkang Wetan Waters from October 2018 to January 2019. The method used was the survey method. The crabs were taken once a week for 4 months. The width and weight of crab carapace were measured. The growth rate of S. serrata was 0.93/year (male) and 0.69/year (female). The natural mortality rate of S. serrata was 1.08/year (male) and 0.89/year (female), the mortality of catch (F) was 0.55/year (male) and 1.09/year (female). The rate of exploitation of male S. serrata reached 34%, and the rate of exploitation of female S. serrata was 55%. The exploitation of female S. serrata shows that overexploitation has occurred because the optimum value of exploitation (E-OPTIMUM) is equivalent to E=50%.

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Kajian Potensi Pengembangan Ekowisata Sebagai Upaya Konservasi Mangrove Di Desa Pasar Banggi, Kabupaten Rembang

Journal of Marine Research ◽

10.14710/jmr.v8i1.24337 ◽

2019 ◽

Vol 8 (1) ◽

pp. 117-126

Author(s):

Ghea Ken Joandani Joandani ◽

Rudhi Pribadi ◽

Chrisna Adhi Suryono

Keyword(s):

Development Strategy ◽

Mangrove Forest ◽

Swot Analysis ◽

Secondary Data ◽

Mangrove Ecosystem ◽

Primary Data ◽

Survey Method ◽

Regional Government ◽

Mangrove Forests ◽

Central Java

Kawasan mangrove di Desa Pasar Banggi ditetapkan sebagai salah satu kawasan strategis dari sudut kepentingan fungsi dan daya dukung lingkungan hidup. Ekosistem mangrove di Desa Pasar Banggi merupakan salah satu yang terbaik di wilayah Pantura Jawa Tengah, sebelum dilakukan upaya rehabilitasi kondisi hutan mangrove di Desa Pasar Banggi mengalami kerusakan. Mengingat pentingnya fungsi hutan mangrove, maka sudah selayaknya dilakukan penanganan yang serius untuk mengurangi efek dari kerusakan ekosistem mangrove di Rembang ini. Salah satu alternative pemanfaatan yang memungkinkan untuk menjaga keutuhan ekosistem mangrove tersebut adalah melalui kegiatan ekowisata. Tujuan dari penelitian ini adalah untuk mengkaji potensi ekowisata mangrove di Pasar Banggi dan memberikan rekomendasi serta strategi pengembangan ekowisata di Pasar Banggi, Rembang. Metode yang digunakan dalam penelitian ini adalah deskriptif eksploratif. Metode pengumpulan data dengan menggunakan metode survei dalam bentuk data primer dan data sekunder. Data yang diperoleh dilakukan penentuan strategi pengembangan ekowisata mangrove dan analisis SWOT (Strength, Weakness, Opportunity, dan Threat). Hasil penelitian menunjukan bahwa faktor-faktor yang mempengaruhi pengembangan ekowisata mangrove di Desa Pasar Banggi adalah keragaman jenis mangrove, kualitas SDM dalam menangani wisatawan, ketersediaan SDA berkualitas untuk ekowisata dalam upaya konservasi, kebijakan dari pemerintah daerah terkait peraturan serta perundang-undangan tentang ekowisata hutan mangrove di Desa Pasar Banggi, kondisi sosial-ekonomi masyarakat, serta infrastruktur pendukung. Menurut analisi SWOT yang menjadi prioritas utama adalah: a) Peningkatan pengembangan ekowisata mangrove dalam bidang promosi program ekowisata dan penguatan institusi sebagai informasi ilmu pengetahuan ekosistem mangrove (Skor:4,52) dan b) Peningkatan partisipasi stakeholder terhadap pengembangan ekowisata mangrove yang berkelanjutan untuk peningkatan pelayanan terhadap pengunjung (Skor:3,29). The mangrove area in Pasar Banggi Village is designated as one of the strategic region, as the point of importance of function and living environmental support. Mangrove ecosystem in Pasar Banggi Village is the best one area in Pantura, Central Java. Actually, Pasar Banggi Village’s condition was suffered damage before any efforts of rehabilitation of mangrove forest. Regarding the importance of the function of mangrove forests, there is a must doing a serious action to reduce the damage effects to the mangrove’s ecosystem in Rembang. One of the utilization alternative that can be used to maintain the integrity of the mangrove ecosystem is through ecotourism activities. The purpose of this research is examining the potential of ecotourism in Pasar Banggi Village and giving recommendation with ecotourism development strategy. Method which is used in this research is explorative descriptive.The collecting data method using survey method in form of primary data and secondary data. Then take the decision about the mangrove ecotourism development strategy and SWOT (Strength, Weakness, Opportunity, and Threat) analysis, after the data were obtained. The research results shows that the factors that affects the mangrove ecotourism development in Pasar Banggi Village is kind of types of mangroves, human resources’ quality while dealing with tourists or visitors, the availability of qualified nature resources for ecotourism, in effort of conservation, a policy of regional government related regulations and law about mangrove forest ecotourism in Pasar Banggi Village, community’s socio-economic conditions, also supporting infrastructure. According to the SWOT analysis, the top concerning priority are: a) mangrove ecotourism raising development in the field of ecotourism program promotion and institution strengthening as the mangrove ecosystem knowledge information (Score: 4.52) and b) Raising stakeholders’ participation toward the sustainable mangrove ecotourism development for improving service toward visitors (Score: 3.29)

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Peran Ekosistem Hutan Mangrove Sebagai Habitat Untuk Organisme Laut

JURNAL BIOLOGI TROPIS ◽

10.29303/jbt.v17i2.406 ◽

2017 ◽

Vol 17 (2) ◽

Author(s):

Karimah, M. Fahrurrozi

Keyword(s):

Forest Ecosystem ◽

Mangrove Forest ◽

Descriptive Analysis ◽

Mangrove Ecosystem ◽

Marine Organisms ◽

Mangrove Forests ◽

Land Area ◽

Portunus Pelagicus ◽

Important Habitat

AbstrakTulisan ini menjelaskan tentang peran ekosistem hutan mangrove sebagai habitat untuk organisme laut dengan menggunaan analisis diskriptif. Data diambil dari literatur-literatur terkait yang kemudian didiskripsikan lebih lanjut. Data yang diperoleh menunjukkan bahwa hutan mangrove di Indonesia diperkirakan mencakup area seluas 4,25 juta hektar, hanya sekitar 2% dari seluruh wilayah daratan, namun nilai ekonomi dan lingkungannya tidak boleh di bawah perkiraan, oleh karena itu kehadirannya harus dijaga. Sebagai zona transisi antara ekosistem terestrial dan laut, ekosistem mangrove telah lama dikenal memiliki banyak fungsi dan merupakan penghubung penting dalam menjaga keseimbangan biologis ekosistem pesisir. Ekosistem hutan mangrove merupakan habitat penting bagi organisme laut. Umumnya didominasi oleh moluska dan krustasea. Moluska ini terdiri terutama dari Gastropoda dan selanjutnya didominasi oleh dua keluarga, yaitu Potamidae dan Ellobiidae. Sedangkan untuk krustasea, terutama terdiri dari Brachyura. Beberapa fauna mangrove juga dikenal sebagai bahan habis pakai dan secara ekonomi penting seperti Terebralia palustris, Telescopium telescopium (Gastropoda), Anadara kuno, Coaxans polymesoda, Ostrea cucullata (Bivalvia), dan Scylla serrate, S. olivacea, Portunus pelagicus, Epixanthus dentatus, Labnanium politum (Crustacea).Kata kunci : hutan mangrove, ekosistem mangrove, moluska Abstract This paper describes the role of the mangrove forest ecosystem as a habitat for marine organisms by using descriptive analysis. The data are drawn from related literatures which are further described. The data obtained indicate that mangrove forests in Indonesia are estimated to cover an area of 4.25 million hectares, only about 2% of the entire land area, but its economic and environmental value should not be underestimated, therefore its presence must be maintained. As a transition zone between terrestrial and marine ecosystems, the mangrove ecosystem has long been known to have many functions and is an important link in maintaining the biological balance of coastal ecosystems. The mangrove forest ecosystem is an important habitat for marine organisms. Generally dominated by molluscs and crustaceans. This mollusc consists mainly of Gastropods and is further dominated by two families, namely Potamidae and Ellobiidae. As for crustaceans, mainly consisting of Brachyura. Some mangrove fauna are also known as economical and economically important materials such as Terebralia palustris, Telescopium telescopium (Gastropoda), ancient Anadara, Coaxans polymesoda, Ostrea cucullata (Bivalvia), and Scylla serrate, S. olivacea, Portunus pelagicus, Epixanthus dentatus, Labnanium politic (Crustacea).Keywords: mangrove forest, mangrove ecosystem, mollusk,

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STOK KARBON DI ATAS PERMUKAAN TANAH PADA HUTAN MANGROVE SUNGAI AWAN KIRI KABUPATEN KETAPANG

JURNAL HUTAN LESTARI ◽

10.26418/jhl.v9i1.45321 ◽

2021 ◽

Vol 9 (1) ◽

pp. 25

Author(s):

Kusmawati Kusmawati ◽

Gusti Hardiansyah ◽

Ganjar Oki Widhanarto

Keyword(s):

Carbon Content ◽

Mangrove Forest ◽

Carbon Stock ◽

River Mouth ◽

Survey Method ◽

Mangrove Forests ◽

Vegetation Biomass ◽

Excoecaria Agallocha ◽

Bruguiera Gymnorhiza ◽

Coastal Plant

Mangrove forests, often referred to as mangrove forests, brackish forests or tidal forests, is a transitional ecosystem between land and sea which are tropical or sub-tropical areas along the sheltered coast and river mouth. Mangrove forest is a coastal plant community dominated by several species of mangrove trees that are able to grow and develop during the tides in accordance with their tolerance to salinity, duration of inundation, substrate and beach morphology. Awan Kiri Mangrove Forest has a total area of 114 hectares including the area of Other Management Areas (APL) then seen from the density of the Mangrove Forest only has 92 hectares. This study uses a non-destructive survey method. Vegetation carbon stock calculation is carried out using vegetation biomass calculation approach. Vegetation biomass calculation based on the calculation of allometric equations. Calculation the value of stored carbon using the formula according to (SNI 7724:2011) the value of parent carbon content,amounting to 0,47. Bassed on the research that has been done, it is found that there are 185 individuals, Rhizophora spp., Bruguiera gymnorhiza, Rhizpphora apiculata, Xylocarpus gerantum and Excoecaria agallocha. The biomassa content can be known in the 3 pathways to store 242,16 tons biomassa and the total biomassa content in 1210,8 tons/ha with an everage of 403,6 tons/ha. The carbon content is 569,06 tons/ha so that it gets an average total of 186,68 tons C/ha.Keywords: Carbon Stock, Ketapang Regency, Sungai Awan Kiri in Mangrove Forests.

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Peran Ekosistem Hutan Mangrove Sebagai Habitat Untuk Organisme Laut

JURNAL BIOLOGI TROPIS ◽

10.29303/jbt.v17i2.497 ◽

2017 ◽

Vol 17 (2) ◽

pp. 51 ◽

Cited By ~ 2

Author(s):

Karimah .

Keyword(s):

Forest Ecosystem ◽

Mangrove Forest ◽

Descriptive Analysis ◽

Mangrove Ecosystem ◽

Marine Organisms ◽

Mangrove Forests ◽

Land Area ◽

Portunus Pelagicus ◽

Important Habitat

AbstrakTulisan ini menjelaskan tentang peran ekosistem hutan mangrove sebagai habitat untuk organisme laut dengan menggunaan analisis diskriptif. Data diambil dari literatur-literatur terkait yang kemudian didiskripsikan lebih lanjut. Data yang diperoleh menunjukkan bahwa hutan mangrove di Indonesia diperkirakan mencakup area seluas 4,25 juta hektar, hanya sekitar 2% dari seluruh wilayah daratan, namun nilai ekonomi dan lingkungannya tidak boleh di bawah perkiraan, oleh karena itu kehadirannya harus dijaga. Sebagai zona transisi antara ekosistem terestrial dan laut, ekosistem mangrove telah lama dikenal memiliki banyak fungsi dan merupakan penghubung penting dalam menjaga keseimbangan biologis ekosistem pesisir. Ekosistem hutan mangrove merupakan habitat penting bagi organisme laut. Umumnya didominasi oleh moluska dan krustasea. Moluska ini terdiri terutama dari Gastropoda dan selanjutnya didominasi oleh dua keluarga, yaitu Potamidae dan Ellobiidae. Sedangkan untuk krustasea, terutama terdiri dari Brachyura. Beberapa fauna mangrove juga dikenal sebagai bahan habis pakai dan secara ekonomi penting seperti Terebralia palustris, Telescopium telescopium (Gastropoda), Anadara kuno, Coaxans polymesoda, Ostrea cucullata (Bivalvia), dan Scylla serrate, S. olivacea, Portunus pelagicus, Epixanthus dentatus, Labnanium politum (Crustacea).Kata kunci : hutan mangrove, ekosistem mangrove, moluska Abstract This paper describes the role of the mangrove forest ecosystem as a habitat for marine organisms by using descriptive analysis. The data are drawn from related literatures which are further described. The data obtained indicate that mangrove forests in Indonesia are estimated to cover an area of 4.25 million hectares, only about 2% of the entire land area, but its economic and environmental value should not be underestimated, therefore its presence must be maintained. As a transition zone between terrestrial and marine ecosystems, the mangrove ecosystem has long been known to have many functions and is an important link in maintaining the biological balance of coastal ecosystems. The mangrove forest ecosystem is an important habitat for marine organisms. Generally dominated by molluscs and crustaceans. This mollusc consists mainly of Gastropods and is further dominated by two families, namely Potamidae and Ellobiidae. As for crustaceans, mainly consisting of Brachyura. Some mangrove fauna are also known as economical and economically important materials such as Terebralia palustris, Telescopium telescopium (Gastropoda), ancient Anadara, Coaxans polymesoda, Ostrea cucullata (Bivalvia), and Scylla serrate, S. olivacea, Portunus pelagicus, Epixanthus dentatus, Labnanium politic (Crustacea). Keywords: mangrove forest, mangrove ecosystem, mollusk.

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IDENTIFIKASI POTENSI DAN STRATEGI PENGEMBANGAN EKOWISATA PADA KAWASAN KONSERVASI HUTAN MANGROVE DESA PASAR BANGGI KABUPATEN REMBANG

Management of Aquatic Resources Journal (MAQUARES) ◽

10.14710/marj.v5i4.14438 ◽

2016 ◽

Vol 5 (4) ◽

pp. 328-336

Author(s):

Aprilia Kukuh Dwijayati ◽

Djoko Suprapto ◽

Siti Rudiyanti

Keyword(s):

Mangrove Forest ◽

Swot Analysis ◽

Secondary Data ◽

Mangrove Ecosystem ◽

Forest Area ◽

Survey Method ◽

Mangrove Forests ◽

Potential Analysis ◽

Tourism Potential

ABSTRAK Desa Pasar Banggi memiliki potensi pariwisata hutan mangrove yang besar untuk dikembangkan. Tujuan dari penelitian ini untuk mengidentifikasi potensi, kesesuaian ekowisata dan menentukan strategi pengembangan ekowisata pada kawasan hutan mangrove Desa Pasarbanggi Kabupaten Rembang. Penelitian dilakukan pada tanggal 3-27 Juli 2016 di kawasan hutan mangrove Desa Pasar Banggi, Kabupaten Rembang. Metode yang digunakan dalam penelitian ini adalah deskriptif eksloratif, dengan menggunakan metode survei dalam bentuk data primer dan skunder. Data yang diperoleh kemudian dianalisis kesesuaian lahan dan analisis SWOT (Strength, Weakness, Opportunity dan Thread). Hasil penelitian menyatakan bahwa ketebalan hutan mangrove 100-150 ha dengan kerapatan bernilai 35-40 ind/m2. Potensi ekowisata yang terdapat pada kawasan hutan mangrove desa Pasarbanggi adanya jenis satwa dalam hal ini jenis burung yang dilindungi seperti kuntul kecil, dan kuntul kerbau.Hasil analisis kesesuaian ekowisata mangrove menunjukan pada stasiun I, II, dan III masing-masing adalah 67%, 78%, dan 70% bahwa kawasan hutan mangrove dukuh Kaliuntu termasuk dalam kategori sesuai untuk dijadikan kawasan ekowisata di Kabupaten Rembang.Menurut hasil analisis SWOT, yang menjadi prioritas utama di Desa Pasar Banggi adalah: a) Penentuan zona dalam kawasan konservasi ekosistem mangrove dan b) Peningkatan partisipasi stakeholder terhadap program konservasi ekosistem mangrove. Kata Kunci: Ekowisata; Hutan Mangrove; Pasar Banggi ABSTRACT Pasar Banggi Village has tourism potential of mangrove forests to be developed. The purpose of this research was to identify the potential,analysis comformity of ecotourism and estabilsh the strategy of ecotourism development in the mangrove forest at Pasar Banggi area Rembang Regency. The research was conducted on July 3 - 27th 2016 in the mangrove forest Pasar Banggi Village, Rembang Regency. The method used in this research is descriptive explorative, by using survey method in a form of primary and secondary data. The collected data was then analyzed the conformitu of the land and SWOT analysis (Strangth, Weakness, Opportunity, and Thread). The result of the research showed that the thickness of mangrove forest is 100-150 ha with the density of 35-40 ind/m2. The ecotourism potential that can be found in the mangrove forest at Pasar banggi village is the existence of protected bird such as little egrets and egrest buffalo. The result of the analysis comformity of ecotourism mangrove was shown in the station I, II, and III respectively are 67%, 78%, and 70% that the mangrove forest area of Kaliuntu Village was include in suitable catagory to be targetted as the ecotourism area in Rembang Regency. Based on the SWOT analysis, the major priority in Pasar Banggi Village are: a) Determining zone in mangrove ecosystem concervational area, and b) The increase of stakeholders participation to the mangrove ecosystem concervational program. Keywords: Ecotourism; Mangrove Forest; Pasar Banggi

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Economic Valuation of Mangrove Forest Ecosystem in Sinjai

TORANI: Journal of Fisheries and Marine Science ◽

10.35911/torani.v1i2.4444 ◽

2018 ◽

Vol 1 (2) ◽

Author(s):

Hamzah Tahang ◽

Amiluddin Amiluddin ◽

Faisal Amir ◽

Firman Firman

Keyword(s):

Forest Ecosystem ◽

Mangrove Forest ◽

Economic Valuation ◽

Economic Value ◽

Mangrove Ecosystem ◽

Mangrove Forests ◽

Average Value ◽

Mangrove Ecosystems ◽

Direct Benefits ◽

And Function

This study aims to identify the type and function of ecosystems of mangrove forests, in Sinjai district and calculate the total economic value of mangrove ecosystems. The analytical method used is economic valuation and willingness to pay community. The results showed that species dominating Rhyzopora sp, Avicennia sp Sonneratia sp and Bruguera sp. The direct benefits to the community from mangrove forest in the area of research are firewood, nipa roof, fish and crabs and bats with economic value of Rp 8,598,020,500 with average value per ha 11,343,117. Indirect value consists of wave breaks of Rp 4,480,000,000 or Rp 448,000,000 / year with an estimated life of the building for 10 years and a carbon sequestration benefit of Rp 153,495,000 a year. Benefit value of Rp203, 250 per ha. The result is multiplied by the total area of the existing mangrove forest ecosystem of 758 Ha, with a total value of biodiversity benefits of Rp 154,063,500 per year. The value of the existence benefit of RP 446,260 ha / yr. With a total area of 758 mangroves, the total benefit of the existence of mangrove ecosystems in Kabupatem Sinjai amounted to Rp 338,265,080 / year. The economic benefit value of Total mangrove sinjai is Rp 13,723,844,080 while the total benefit value per ha is Rp 22,816,656 per year.Keywords: Bennefit economic, Mangrove ecosystem, economic valuaition, Sinjai

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Studi Kelimpahan Scylla serrata Forsskål, 1775 (Portunidae:Malacostraca) Hasil Tangkapan Musim Penghujan Di Perairan Mangkang Semarang

BULETIN OSEANOGRAFI MARINA ◽

10.14710/buloma.v9i1.23659 ◽

2020 ◽

Vol 9 (1) ◽

pp. 69-76

Author(s):

Annisa Rahma Firdaus ◽

Nur Taufiq-Spj ◽

Sri Redjeki

Keyword(s):

Sex Ratio ◽

Mangrove Ecosystem ◽

Abundance Ratio ◽

Scylla Serrata ◽

Survey Method ◽

Market Demand ◽

Male And Female ◽

Purposive Sampling ◽

Central Java ◽

Mangrove Crab

Scylla serrata yang dikenal sebagai kepiting bakau merupakan sumber daya hayati ekosistem bakau yang hingga saat ini memiliki demand pasar yang cukup tinggi. Kondisi ini meningkatkan eksploitasi penangkapan species ini sehingga menyebabkan terganggunya populasi kepiting di alam. Penelitian ini bertujuan untuk mengetahui komposisi hasil tangkapan kepiting bakau (Scylla serrata) dengan melihat rasio kelimpahan dan hubungan lebar - berat kepiting bakau jantan dan betina dari hasil tangkapan di perairan Mangkang Wetan – Tugu, Kota Semarang, Jawa Tengah. Penelitian ini dilakukan pada musim penghujan di akhir tahun 2018 (Desember) dan awal tahun 2019 (Januari). Purposive sampling merupakan metode yang digunakan dalam penelitian ini dengan melakukan survey yang terarah dan terencana. Sampel kepiting bakau didapatkan dari hasil tangkapan nelayan yang diarahkan pada lima titik berdasarkan aktivitas yang berbeda. Hasil menunjukkan bahwa tangkapan kepiting bakau (Scylla serrata) pada Bulan Desember 2018 dan Januari 2019 di dominasi oleh kepiting jantan. Tangkapan bulan Desember 2018 memiliki rasio jantan : betina lebih besar (1,65:1) dari Januari 2019 (1,21:1). Korelasi lebar karapas dan berat kepiting bakau jantan dan betina bersifat allometrik, dimana jantan memiliki pola pertumbuhan allometrik positif sedangkan betina memiliki pola perumbuhan allometrik negatif. Dari data tersebut dapat disimpulkan bahwa populasi kepiting jantan lebih banyak ditemukan selama musim penghujan terutama di bulan Desember dan Januari. Ketidak seimbangan sex rasio ini akan menyebabkan terganggunya kestabilan populasi Scylla setrata di ekosistem estuaria Mangkang Wetan Semarang. Scylla serrata known as mangrove crab as an edible food resources of the mangrove ecosystem which has a very high market demand. Due to this conditions will be affected in increasing exploitation of this species and cause inbalancing the population in the nature. The study aims to calculate abundance ratio and width – weight correlation between male and female of the crab caught from the estuary of Mangkang Wetan Semarang, Central Java. This study conducted at the end of 2018 (December) to the first month of 2019 (Januari). Survey method was used in this study by using purposive sampling in order to get the right data aimed as a planned. The crab sample was caught by some fisherman which were dirrected at five sampling points base on different fisherman activities. The results shows that the caught seasons in the rainy time of Dec 2018 and Jan 2019, dominated by males crab (Scylla serrata). The December caught have higher sex ratio between male and female (1,65:1) compare to Januari caught (1,21:1). Correlation in carapage width and body weigth between the crabs male and female shows allometrik growth. Where, the male growth tend to have a positive allometric, while the female were negative. These can be conclude that, the male crabs were dominantly found during rainy seasons especially in December dan January. This imbalance of the sex ratio will disturb the population stability of Scylla setrata in estuary ecosystem of Mangkang Wetan Semarang.

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PERSEPSI MASYARAKAT TERHADAP KEBERADAAN HUTAN MANGROVE DI DESA DUSUN BESAR KECAMATAN PULAU MAYA KABUPATEN KAYONG UTARA

JURNAL HUTAN LESTARI ◽

10.26418/jhl.v8i2.40075 ◽

2020 ◽

Vol 8 (2) ◽

Author(s):

Hilda Femilia Utami ◽

Sudirman Muin ◽

M Dirhamsyah

Keyword(s):

Correlation Coefficient ◽

Low Income ◽

Significant Relationship ◽

Mangrove Forest ◽

Life Support ◽

Statistical Tests ◽

Survey Method ◽

Social Perceptions ◽

Mangrove Forests ◽

Level Of Education

A coastal ecosystem that must be maintained as a provider of natural resources and as a life support system is called a mangrove forest. There is a connection between the society and the presence of mangrove forests that can not be separated which causes a public perception of the existence of mangrove forests. This study aims to examine the social perceptions of the existence of mangrove forests and analyze the relationship between the level of education, income level, and the level of dependence on mangrove forests with social perceptions of the existence of mangrove forests in Dusun Besar village, Pulau Maya District, North Kayong Regency. This study uses a survey method with interviews and questionnaires containing several questions asked to respondents, and data collected by using purposive random sampling. Data is analyzed by using descriptive analysis of the Chi-Square test and inferential analysis using nonparametric statistical tests of the Kendall Tau correlation. The number of respondents in this study is 92 people from 1.118 KK. The results of this study indicate that society perceptions tend to be positive (53,26%), low-income levels (55,43%), and high levels of dependency (54,35%). There is a positive and insignificant relationship between the level of education and perception (sig (2-tailed) amount of 0,697, the score of the correlation coefficient is 0,037). There is a positive and significant relationship between the level of income and perception (sig (2-tailed) amount of 0,031, the score of the correlation coefficient is 0,183), and there is a positive and significant relationship between the level of dependency and perception (sig (2-tailed) amount of 0,000, the score of the correlation coefficient is 0,420).Keywords: Dusun Besar Village, mangrove forest, perception.

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