Morfometri Dan Pertumbuhan Scylla serrata (Filum: Arthropoda, Famili: Portunidae) Di Desa Panikel, Segara Anakan, Cilacap

Mud crab is one of fishery commodities which is important in Indonesia . The high demand for mud crabs needs to be balanced with the right management strategy, so that the population will not extinction. Penikel Village, Cilacap is one of the fishing villages which catch mud crabs because of the high demand in the big cities such as Jakarta, Bandung and Bali. The purpose of this study is to determine the population and growth patterns of mud crabs in the Panikel Village, Kampung Laut District, Cilacap. The location of the study was determined by purposive sampling. Wadong and bubu are fishing tools to catch mud crabs. Sampling 67 mud crabs was carried out on Juni 2016, after that, measurement of length, carapace width and total weight were carried out. Regression analysis between carapace width and total weight and condition factors were carried out to determine growth patterns. Based on the research, the average value of the S. serrata length was 63.94±11.31 mm while the female one was 70.29±14.57 mm. The average value of carapace width is 92.28±15.51 mm (male) while for female sex was 98.71±18.38 mm. The average weight of S. serrata male crabs was 190.31±118.43 mm, while those of female sex were 210.77±120.93 mm. Furthermore, based on the analysis of the relationship between the length of weight found negative allomatric growth pattern with the value of the condition factor included in the low category both for male sex 0.73-1.93 and for female sex 0.59-1.66. The low condition factor shows that the condition of Segara Anakan waters especially Penikel Village does not support the growth of mud crabs (S. serrata). Kepiting bakau (Scylla serrata) merupakan salah satu komoditas perikanan yang terpenting di Indonesia. Besarnya permintaan kepiting bakau yang tinggi perlu diimbangi dengan strategi pengelolaan yang tepat agar populasi tidak punah. Desa Penikel, Cilacap merupakan satu desa nelayan yang banyak menangkap kepiting bakau karena tingginya permintaan di kota besar seperti Jakarta, Bandung dan Bali. Tujuan dari penelitian ini untuk mengetahui populasi dan pola pertumbuhan kepiting bakau di Desa Panikel, Kecamatan Kampung Laut, Cilacap. Penentuan lokasi penelitian dilakukan secara purposive sampling. Wadong dan bubu merupakan alat tangkap untuk menangkap kepiting bakau. Pengambilan sampel kepiting sebanyak 67 individu dilakukan pada bulan Juni 2016, setelah itu dilakukan pengukuran panjang, lebar karapas serta berat total. Analisa regresi kurva antara lebar karapas dan berat total serta faktor kondisi dilakukan untuk mengetahui pola pertumbuhan. Berdasarkan penelitian diperoleh nilai rata-rata panjang kepiting bakau S. serrta jantan adalah 63.94±11.31 mm sedang untuk yang betina adalah 70,29±14.57 mm. Nilai rata-rata lebar karapas adalah 92.28±15.51 mm (jantan) sedang untuk jenis kelamin betina adalah 98.71±18.38 mm. Rata-rata berat kepiting jantan S. serrata adalah 190.31±118.43 mm, sedangkan yang jenis kelamin betina adalah 210.77±120.93 mm. Selanjutnya berdasarkan analisa hubungan panjang berat ditemukan pola pertumbuhan allomatrik negatif dengan nilai factor kondisi termasuk dalam katagori rendah baik untuk jenis kelamin jantan 0,73–1,93 maupun untuk kelamin betina 0,59–1,66. Rendahnya factor kondisi menunjukkan bahwa kondisi perairan Segara Anakan khususnya Desa Penikel tidak menunjang bagi petumbuhan kepiting bakau (S. serrata).

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Kelimpahan dan pola pertumbuhan kepiting bakau (Scylla serrata) di hutan mangrove Kelurahan Belawan Sicanang, Kecamatan Medan Belawan, Provinsi Sumatera Utara

Acta Aquatica Aquatic Sciences Journal ◽

10.29103/aa.v4i1.320 ◽

2017 ◽

Vol 4 (1) ◽

pp. 26

Author(s):

Yenni Ningsih Siringoringo ◽

Desrita Desrita ◽

Yunasfi Yunasfi

Keyword(s):

Water Quality ◽

Growth Pattern ◽

Sandy Loam ◽

Carapace Width ◽

Population Decline ◽

Scylla Serrata ◽

Nursery Ground ◽

Purposive Sampling ◽

Mangrove Crab ◽

Substrate Texture

Kepiting bakau (Scylla serrata) merupakan salah satu spesies kunci dalam ekosistem mangrove yang memegang peranan yang sangat penting. Hutan mangrove yang ada di Kelurahan Belawan Sicanang sudah banyak mengalami konversi lahan seperti tambak dan pemukiman. Kondisi ini menyebabkan terjadinya penurunan kualitas habitat dan penurunan populasi untuk sumberdaya kepiting bakau akibat terjadinya kerusakan daerah asuhan dan mencari makan biota ini. Penelitian ini bertujuan untuk mengetahui kondisi ekologi mangrove, untuk mengetahui kelimpahan kepiting bakau (Scylla serrata), untuk mengetahui pertumbuhan kepiting bakau (Scylla serrata) di Hutan Mangrove Kelurahan Belawan Sicanang Kecamatan Medan Belawan Provinsi Sumatera Utara. Penelitian berlangsung pada Mei - Juni 2016. Metode yang digunakan dalam penentuan lokasi adalah purposive sampling dan dibagi menjadi 3 stasiun berdasarkan aktivitas yang berbeda. Struktur populasi kepiting bakau (Scylla serrata) ditinjau dari kelimpahan kepiting bakau (Scylla serrata), hubungan lebar karapas dengan bobot tubuh, pola pertumbuhan, dan faktor kondisi. Kualitas habitat kepiting bakau (Scylla serrata) dilihat dari kualitas air, tekstur substrat, C-organik, dan pasang surut. Hasil menunjukkan bahwa kelimpahan kepiting bakau (Scylla serrata) 16300 - 17000 ind/ha, dengan pola pertumbuhan allometrik negatif (b<3), faktor kondisi berkisar antara 0 - 1 yang tergolong ke dalam pipih atau tidak gemuk. Kualitas air dan substrat yang dikaji termasuk ke dalam kualitas air yang menunjang kehidupan kepiting bakau (Scylla serrata), tekstur substrat yaitu lempung berpasir dan lempung liat berpasir, serta C-organik < 1% tergolong sangat rendah, dimana tipe pasang surutnya adalah mixed prevailing semidiurnal.Mangrove crab (Scylla serrata) is one of the keystone species in the mangrove ecosystem, which had a very important role. Mangrove forests existed in Village Belawan Sicanang have been many experienced land conversion as embankment and settlements. These conditions led to degradation in habitat quality and population decline for mangrove crab due to the occurrence of the damage to the nursery ground and the feeding ground. The research aimed to determine abundance mangrove crabs and to determine the growth of mangrove crab. The research took place in May - June 2016. The method used in the determination of the location is purposive sampling and divided into 3 stations based on different activities. The mangrove crab population structure in terms of the abundance of mangrove crab, carapace width relation with body weight, growth pattern, and factor condition. The quality habitat mangrove crab viewed the water quality, the substrate texture, C-organic, and tides. The results showed that the growth pattern was negative allometric (b < 3), factor condition ranges between 0 - 1 which classified into flat or not fat. The water quality and substrate were assessed included in the water quality that supported life mangrove crab, the substrate texture was sandy loam and sandy clay loam, C-organic classified < 1% was very low, the type of tides was mixed semidiurnal prevailing.

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Pola Pertumbuhan Kepiting Bakau (Scylla serrata) Di Perairan Desa Bandengan Kendal

Journal of Marine Research ◽

10.14710/jmr.v10i1.28990 ◽

2021 ◽

Vol 10 (1) ◽

pp. 14-22

Author(s):

Nila Munana ◽

Irwani Irwani ◽

Widianingsih Widianingsih

Keyword(s):

Growth Pattern ◽

Full Moon ◽

Carapace Width ◽

Scylla Serrata ◽

Moon Phases ◽

Mangrove Crab ◽

Exploratory Data ◽

New Moon ◽

Mangrove Crabs ◽

Mud Crabs

Kepiting bakau (Scylla serrata) merupakan jenis kepiting yang banyak ditemukan di beberapa daerah, salah satunya di Perairan Desa Bandengan, Kendal. Kepiting bakau setiap harinya ditangkap oleh nelayan, keadaan ini dapat mempengaruhi terhadap populasi kepiting bakau. Fase bulan dapat memberikan pengaruh terhadap kepiting bakau, seperti pada tingkah laku kepiting bakau. Tujuan dari penelitian ini yaitu untuk mengetahui pola pertumbuhan kepiting bakau pada fase bulan mati dan purnama di Perairan Desa Bandengan Kendal. Metode yang digunakan yaitu bersifat deskriptif eksploratif. Pengambilan data dilakukan sebanyak 6 kali periode pada 28 Desember 2019 – 9 Maret 2020, data dari kepiting bakau meliputi panjang karapas, lebar karapas, berat tubuh, jumlah kepiting bakau, dan parameter perairan. Jumlah kepiting bakau yang diperoleh selama penelitian sebanyak 212 ekor bulan mati dan 236 ekor bulan purnama. Hasil penelitian menunjukkan pola pertumbuhan kepiting bakau jantan bulan mati bersifat allometrik positif, sedangkan pada kepiting bakau betina bersifat allometrik negatif. Sedangkan, pada purnama 1 bersifat allometrik positif, bulan purnama 2 dan bulan purnama 3 bersifat allometrik negatif, sedangkan kepiting bakau betina bersifat allometrik negatif. Mud crab (Scylla serrata) is a type of crab that is found in several areas, one of which is in the waters of Bandengan Village, Kendal. Every day mud crabs are caught by fishermen, this situation can affect the mangrove crab population. The moon phase can affect mud crabs, such as the behavior of mud crabs. The purpose of this study was to determine the growth pattern of mud crabs in the new moon and full moon phases in the waters of the village of Bandengan, Kendal. The method used is descriptive exploratory. Data collection was carried out 6 times during the period on 28 December 2019 - 9 March 2020, data from mud crabs included carapace length, carapace width, body weight, number of mangrove crabs, and water parameters. The number of mud crabs obtained during the study was 212 new moons and 236 full moons. The results showed that the growth pattern of male mud crabs in the new moon was positive allometric, while the female mud crabs were negative allometric. Meanwhile, full moon 1 is allometric positive, full moon 2, and full moon 3 allometric negatives, while female mud crabs are allometric negative.

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THE CORRELATION OF CARAPACE WIDTH – BODY WEIGHT, CONDITION FACTOR, AND ABUNDANCE OF SCYLLA SERRATA FORSSKÅL, 1775 IN EMBANKMENT LANE SILVOFISHERY DEVELOPMENT AREA OF MAROS DISTRICT

International Journal of Research -GRANTHAALAYAH ◽

10.29121/granthaalayah.v7.i12.2019.310 ◽

2020 ◽

Vol 7 (12) ◽

pp. 177-188

Author(s):

Budiman Yunus ◽

Suwarni

Keyword(s):

Coastal Area ◽

Condition Factor ◽

Carapace Width ◽

Scylla Serrata ◽

Male And Female ◽

South Sulawesi ◽

Mangrove Crab ◽

Weight Condition ◽

Development Area ◽

Mangrove Crabs

The research aims to find out the correlation of carapace width – weight, condition factor and abundance of mangrove crab based on observation time and sex in the coastal waters of Maros district, South Sulawesi. This research provides information on the pattern of growth and chubbiness of mangrove crabs and its abundance in the coastal area of Maros district, South Sulawesi. The study was conducted from early February until the end of April 2019. Sampling was conducted on the coastal area of Kuri Lompo and estuary of Maros which is an integrated mangrove pond development (silvofishery). 213 mangrove crabs (120 male and 93 female) obtained from fishermen were measured. The coefficient b of male and female mangrove crabs in February and March were 3.3626 and 2.6674, respectively. In April, b value of male and female mangrove crab was 3.5965 and 2.6506, respectively. This relation shows the growth type for males is allometric-positive whereas for females is allometric-negative. In April also saw the same growth coefficient in the previous month allometric positive for males and allometric negative for females. In general, the condition factor of male mangrove crabs in February and March is greater than female mangrove crabs. While, in April the condition factor of female mangrove crab is greater than male mangrove crab. The nature of condition factor of mangrove crab represents the distribution of crab abundance in the embankment lane silvofishery development area of 0.015 ind./m2.

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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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Body Weight, Carapace Length and Width Relationship and Condition Factor of the Mud Crab Scylla serrata (Forskal) in Mangrove Ecosystem

Notulae Scientia Biologicae ◽

10.15835/nsb9310127 ◽

2017 ◽

Vol 9 (3) ◽

pp. 338-343 ◽

Cited By ~ 2

Author(s):

Sarvabhowma Chakravarty MYLA ◽

Vijaya Bharathi TIRUMANI ◽

Rama Chandra Ganesh PATURI

Keyword(s):

Carapace Length ◽

Condition Factor ◽

Carapace Width ◽

Scylla Serrata ◽

Regression Equations ◽

Allometric Growth ◽

Mud Crab ◽

Relative Condition Factor ◽

Males And Females ◽

Relationship Of

The relationship of length-weight and width-weight of the carapace and the relative condition factor of mud crab Scylla serrata from Coringa Wildlife Sanctuary (Andhra Pradesh, India) was the subject of present study. Significant difference in both males and females was observed between carapace length-weight, carapace width-weight with a linear relationship. The regression values of both the sexes were found to be statistically significant. The regression equations calculated for length-weight were W= 0.00000178 L 3.1139 (r= 0.95) for males, W= 0.00000520 L 2.8056 (r=0.94) for females and for sexes combined it was W = 0.0000297 L 2.9891(r= 0.94). In case of carapace width-weight relationship of males, females and sexes combined the regression equations were W= 0.00000121 CW 3.0426 (r= 0.92), W= 0.00000178 CW 2.775 (r=0.93) and W = 0.00000204 CW 2.9210(r= 0.92) respectively. The male crabs showed positive allometric growth whereas female had negative allometric growth. Analysis of covariance confirmed remarkable difference between males and females in the growth pattern. The mean relative condition factor (Kn values) of both males and females and of the pooled sexes ranged from 0.680 (April) to 1.029 (November). A gradual raise in Kn values was observed from small- to big- sized crabs in both the sexes. Peak values were observed in 12.0-13.9 cm size group in November.

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Some Biological Aspects of Freshwater Lobsters, Cherax quadricarinatus, in Ralik River of Southeast Minahasa and in Tondano Lake of Minahasa

JURNAL ILMIAH PLATAX ◽

10.35800/jip.7.1.2019.21444 ◽

2018 ◽

Vol 7 (1) ◽

pp. 34

Author(s):

Rinaldi Kuhu ◽

Rose O.S.E Mantiri ◽

John L. Tombokan

Keyword(s):

Growth Pattern ◽

Condition Factor ◽

Growth Patterns ◽

The Body ◽

Sampling Point ◽

Freshwater Crayfish ◽

Cherax Quadricarinatus ◽

Average Value ◽

Weight Growth ◽

The Relationship

The purpose of this study was to determine the relationship between the length of weight, the growth patterns and the biological conditions of freshwater crayfish, Cherax quadricarinatus, in two different locations namely river and lake. Sampling in Ralik river of Southeast Minahasa, used a sibu-sibu fishing gear (salapa) by traversing the river (opposite the current) from the point of the pick up location until the sampling point taken. As for sampling at Tondano Lake of Minahasa, it was carried out by buying directly from local fishermen who used bubu as a fishing tool. Furthermore, samples from these two locations were analyzed at the Freshwater Bioecology Laboratory of FPIK UNSRAT Manado.The results obtained from this study are the linear equation of the relationship of the length of weight in the river for male lobsters W = -1.761049+ 3.1153 log L, and W = -1.647836 + 2.957268 log L for female lobsters; in the lake W = -1,494 + 2,8495 log L for males and females W = -1,388 + 2,7198 log L. The growth pattern of male and female lobsters in river and males in the lake is isometric; whereas females in allometric lakes. The value of the biological condition of the river male losbters ranged from 0.90 to 1.14 with an average value of 1.004 ± 0.06, whereas in lake male lobster the value of the condition factor ranged from 0.83 to 1.23 with an average value of 1.004 ± 0.09. The value of the condition of river female lobsters with a range between 0.82-1.18 with an average value of 1.004 ± 0.89 and the condition factor of lake female lobsters ranged from 0.90 to 1.11 with an average value of 1.001 ± 0.06. This shows that the body condition of a fat lobsters were good enough. Keywords: Freshwater Lobster, Long-weight, Growth pattern, Factor of biological conditions. ABSTAKTujuan dari penelitian ini adalah untuk mengetahui hubungan panjang berat, pola pertumbuhan faktor kondisi biologis dari lobster air tawar Cherax quadricarinatus di dua lokasi berbeda yaitu sungai dan danau. Pengambilan sampel di Sungai Ralik, Minahasa Tenggara menggunakan alat tangkap sibu-sibu (salapa) dengan cara menyusuri sungai (berlawanan arus) dari titik lokasi pengambilan sampai batas pengambilan sampel dilakukan. Adapun pengambilan sampel di Danau Tondano Minahasa, dilakukan dengan cara membeli langsung dari nelayan lokal yang memakai bubu sebagai alat tangkap. Sampel-sampel yang diperoleh selanjutnya dianalisis di Laboratorium Bioekologi Perairan Tawar FPIK UNSRAT Manado.Hasil yang didapat dari penelitian ini yakni persamaan linier hubungan panjang berat di sungai untuk jantan W = -1,761049+ 3.1153 log L, dan W = -1,647836 + 2,957268 log L untuk betina; di danau W = -1,494 + 2,8495 log L untuk jantan dan betina W = -1,388 + 2,7198 log L. Pola pertumbuhan lobster jantan dan betina di sungai dan jantan di danau adalah isometrik; sedangkan betina di danau allometrik. Nilai faktor kondisi biologis lobster jantan sungai berkisar antara 0,90-1,14 dengan nilai rata- rata 1,004±0,06, sedangkan lobster jantan danau berkisar antara 0,83-1,23 dengan nilai rata-rata 1,004±0,09. Nilai faktor kondisi lobster betina sungai berkisar antara 0.82-1.18 dengan nilai rata-rata 1,004±0,89 dan lobster betina danau berkisar antara 0,90-1,11 dengan nilai rata-rata 1,001±0,06. Hal ini menunjukkan bahwa kondisi badan lobster cukup baik. Kata kunci : Lobster air tawar, Panjang-berat, Pola pertumbuhan, Faktor kondisi biologis.

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Studi Morfometrik Kepiting Bakau (Scylla serrate) Forsskål, 1775 (Malacostraca : Portunidae) di Kecamatan Wedung, Demak, Jawa Tengah

Journal of Marine Research ◽

10.14710/jmr.v9i4.25960 ◽

2020 ◽

Vol 9 (4) ◽

pp. 495-500

Author(s):

Jakfar Shodiq Panatar ◽

Ali Djunaedi ◽

Sri Redjeki

Keyword(s):

Relative Abundance ◽

Coastal Waters ◽

Carapace Width ◽

Economic Value ◽

Growth Patterns ◽

Scylla Serrata ◽

Mangrove Forests ◽

Mud Crab ◽

Width Distribution ◽

The Relationship

ABSTRAK : Kepiting bakau (Scylla serrata) adalah jenis kepiting yang hidup di perairan pantai, tambak, dan hutan bakau (mangrove). Kepiting bakau (Scylla serrata) merupakan komoditas ekspor bernilai ekonomis tinggi yang sangat potensial untuk dikembangkan dan memiliki nilai ekonomis yang tinggi di Indonesia, terutama kepiting yang sudah dewasa serta gemuk. Tujuan penelitian ini adalah untuk mengetahui karakteristik morfometrik kepiting bakau (Scylla serrata) seperti kelimpahan relatif kepiting bakau (Scylla serrata), distribusi lebar karapas, dan hubungan lebar karapas – berat kepiting bakau (Scylla serrata). Analisis yang digunakan dalam penelitian ini yaitu kelimpahan realatif kepiting dan analisis regresi. Penelitian ini dilaksanakan pada bulan Februari – April 2019 di Kecamatan Wedung, Demak. Materi yang digunakan pada penelitian ini adalah sampel kepiting bakau (Scylla serrata) hasil tangkapan nelayan di daerah tersebut. Kepiting bakau hasil tangkapan nelayan tersebut dihitung jumlahnya, diidentifikasi jenis kelaminnya, diukur lebar karapas dan ditimbang beratnya. Hasil penelitian menunjukkan bahwa Kepiting bakau (Scylla serrata) yang tertangkap pada bulan Februari – April 2019 diperoleh 300 individu yang terdiri dari 202 jantan dan 98 betina. Rata – rata ukuran lebar karapas tertinggi berkisar 9.8 cm pada hasil tangkapan di bulan Februari. Hubungan lebar karapas – berat Kepiting bakau (Scylla serrata) baik jantan maupun betina menunjukkan pola pertumbuhan allometrik negatif. ABSTRACT : Giant mud crab (Scylla serrata) are types of crabs that live in coastal waters, ponds, and mangrove forests. Giant mud crab (Scylla serrata) is a high economic value export commodity that has the potential to be developed and has high economic value in Indonesia, especially crabs that are mature and fat. The purpose of this study was to determine the morphometric characteristics of giant mud crab (Scylla serrata) such as relative abundance of giant mud crab (Scylla serrata), carapace width distribution, and the relationship between carapace width - weight of giant mud crab (Scylla serrata). The analysis used in this study is the relative abundance of giant mud crab and regression analysis. This research was conducted in February - April 2019 in the subdistrict of Wedung, Demak. The material used in this study was a sample of giant mud crab (Scylla serrata) from the fishermen catch in the area. The giant mud crab captured by the fishermen are counted, identified by sex, measured in carapace width and weighed. The results showed that giant mud crab (Scylla serrata) caught in February - April 2019 obtained 300 individuals consisting of 202 males and 98 females. The highest average carapace width ranges from 9.8 cm in catches in February. Relationship between carapace and weight of giant mud crab (Scylla serrata) both male and female showed negative allometric growth patterns.

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Perbedaan Metode Mutilasi Terhadap Lama Waktu Molting Scylla serrata

BULETIN OSEANOGRAFI MARINA ◽

10.14710/buloma.v8i2.24886 ◽

2019 ◽

Vol 8 (2) ◽

pp. 103

Author(s):

Raden Ario ◽

Ali Djunaedi ◽

Ibnu Pratikto ◽

Petrus Subardjo ◽

Fauzia Farida

Keyword(s):

Experimental Method ◽

Economic Value ◽

Treated Group ◽

Total Weight ◽

Scylla Serrata ◽

Soft Shell ◽

Increasing Demand ◽

Mud Crabs

Kepiting bakau (Scylla serrata) memiliki nilai ekonomis tinggi. Kebutuhan kepiting bakau selalu meningkat sehingga perlu diupayakan budidaya kepiting bakau secara intensif. Salah satu perkembangan teknologi dalam budidaya perikanan untuk meningkatkan produksi kepiting bakau adalah produksi kepiting cangkang lunak. Kepiting cangkang lunak merupakan kepiting fase ganti kulit (molting) yang mempunyai keunggulan cangkangnya lunak sehingga dapat dikonsumsi secara utuh. Untuk mempercepat kepiting molting diperlukan berbagai rangsangan yang salah satunya adalah menggunakan metode mutilasi. Tujuan penelitian untuk mengetahui perbedaan lama waktu molting dan pertumbuhan berat kepiting bakau dengan menggunakan metode mutilasi pada kaki jalan dan capit. Metode penelitian yang digunakan yaitu metode eksperimental dengan rancangan acak lengkap (RAL) yang terdiri dari empat perlakuan, yaitu mutilasi kaki jalan dan capit, semua kaki jalan, capit, dan alami. Biota yang digunakan berjumlah 40 ekor dengan 10 kali ulangan tiap perlakuan. Data yang diperoleh berupa lama waktu molting serta pertambahan berat mutlak kepiting bakau yang dianalisis menggunakan uji statistik parametrik. Hasil penelitian menunjukkan metode mutilasi berpengaruh terhadap lama waktu molting dengan waktu molting tercepat pada perlakuan mutilasi kaki jalan dan capit rata-rata 13 hari. Metode mutilasi tidak berpengaruh terhadap pertumbuhan berat mutlak dengan nilai tertinggi pada kepiting perlakuan alami sebesar 53,30 gram. Mud crabs (Scylla serrata) are known to have a high economic value. The increasing demand of mud crabs for consumption rxcequires higher production. Therefore, mud crabs need to be cultivated intensively. One of the methods to improve the values of mud crabs’ aquaculture is by producing soft-shell crabs. Soft-shell crabs are produced during molting phase in which the crab shed it’s exoskeleton in order to grow. In the fisheries industry, the soft-shell crabs are considered to be more valuable as it can be consumed as a whole. Accelerating the production of molting crabs, requires stimulus. One of the methods is mutilation. The aim of this study is to estimate the periods required for molting under different treatments, as well as calculating the increase of total weight of molting crabs.. The method used was an experimental method which contained four treatments. The treatments are mutilation of walking legs and claws, all of walking legs, claws, and no mutilation. The number of crabs used was 40 with 10 replications per treatment. The data obtained in the period of molting and the increase of total weight of the mud crabs were analyzed using ANOVA. The result shows that mutilation affects the period of crab’s molting in which the fastest molting (13 days on average) occurred after mutilation of walking legs and claws. This mutilation method does not influence the increase of total weight and the highest value is showed in non-treated group with the increase of 53,30 grams in weight.

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ASPEK BIOEKOLOGI SEBAGAI DASAR PENGELOLAAN SUMBERDAYA KEPITING BAKAU (Scylla spp.) PADA EKOSISTEM MANGROVE PASSO

TRITON : Jurnal Manajemen Sumberdaya Perairan ◽

10.30598/tritonvol16issue1page8-18 ◽

2020 ◽

Vol 16 (1) ◽

pp. 8-18

Author(s):

Laura Siahainenia ◽

Miftah Makatita

Keyword(s):

Sex Ratio ◽

Carapace Width ◽

Management Strategies ◽

Good Condition ◽

Mangrove Ecosystem ◽

Structured Interview ◽

Ecological Data ◽

Purposive Sampling ◽

Mangrove Crab ◽

Mud Crabs

Mud crabs have become an important commodity in Indonesia. The purpose of the research was to 1) analyze environmental conditions of the mud crabs habitat; 2) analyze the species compositions, sex ratio, reproduction status (size, period, and the reproduction site) of the mud crab; and 3) formulate management strategies for mud crabs (Scylla spp.) as well as their habitats. This Research was carried out in Passo mangrove ecosystem from August 2015-January 2016. Purposive sampling techniques was used to collect bio-ecological data of mud crabs whereas a structured interview was applied to obtain a management strategy data. The resust showed that the quality of Passo mangrove ecosystem is in good condition for the growth and survival of mud crabs. Four types of mud crabs were found with very low density. Sex ratio shifted from 1:1. Almost all individuals caught were in the reproductive phase with a carapace width of 10-15 cm. The peak of the reproductive season in January along the tidal channel, the mangrove forest front zone to the sea zone. This study recommend ten strategies in relation to the sustainability of the mangrove crab population and habitat preservation. ABSTRAK Kepiting bakau telah menjadi komoditas penting di Indonesia yang hidup di ekosistem mangrove. Penelitian ini bertujuan untuk 1) menganalisis kondisi lingkungan ekosistem mangrove Passo yang menjadi habitat alami kepiting bakau; 2) menganalisis komposisi jenis, kepadatan, rasio kelamin, status reproduksi, (ukuran, waktu dan lokasi reproduksi kepiting bakau; dan 3) merumuskan strategi pengelolaan sumberdaya kepiting bakau (Scylla spp.) serta habitatnya. Penelitian berlangsung di ekosistem mangrove Passo Teluk Ambon sejak Agustus 2015-Januari 2016. Pengumpulan data bioekologi kepiting bakau menggunakan metode purposive sampling, sedangkan strategi pengelolaan diperoleh melalui hasil wawancara terstruktur dengan masyarakat. Hasil penelitian menunjukkan kualitas lingkungan masih baik untuk pertumbuhan dan kelangsungan hidup kepiting bakau. Ditemukan empat jenis kepiting bakau dengan tingkat kepadatan yang sangat rendah. Rasio kelamin bergeser dari 1:1. Hampir semua individu yang tertangkap tergolong dalam fase reproduksi dengan ukuran lebar karapaks 10-15 cm. Puncak musim reproduksi pada bulan Januari di sepanjang alur pasang surut, zona depan hutan mangrove hingga zona laut. Terdapat sepuluh strategi pengelolaan yang direkomendasikan terkait keberlanjutan populasi kepiting bakau dan kelestarian habitat. Kata kunci: Kepiting bakau, Scylla, ekosistem mangrove, pengelolaan, kepadatan

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Biomorfometri Kepiting Bakau di Perairan Bandengan Kendal

Journal of Marine Research ◽

10.14710/jmr.v9i1.25794 ◽

2020 ◽

Vol 9 (1) ◽

pp. 55-64

Author(s):

Shofi Firda Safitri ◽

Sunaryo Sunaryo ◽

Ali Djunaedi

Keyword(s):

Carapace Width ◽

Scylla Serrata ◽

Scylla Paramamosain ◽

Mud Crab ◽

Foreign Markets ◽

Female Crab ◽

Ratio Condition ◽

Mangrove Crabs ◽

The Relationship ◽

Mud Crabs

ABSTRAK: Kepiting Bakau (Scylla sp.) merupakan sumberdaya kelautan penting di Indonesia dan permintaan terhadap komoditi Kepiting Bakau cenderung meningkat, baik di pasar lokal maupun mancanegara. Peningkatan permintaan Kepiting Bakau dapat menyebabkan terganggunya populasi kepiting di alam. Penelitian ini bertujuan untuk mengkaji biomorfometrik Kepiting Bakau (Scylla sp.) yang meliputi ukuran lebar karapas Kepiting Bakau, hubungan lebar karapas dan berat, nisbah kelamin, faktor kondisi dan tingkat kematangan gonad Kepiting Bakau di perairan Bandengan Kendal pada November 2018 sampai Februari 2019. Penelitian menggunakan metode deskriptif eksploratif. Hasil penelitian menunjukkan, bahwa jumlah Kepiting Bakau yang diamati sebanyak 1914 ekor, terdiri atas 897 betina dan 1017 jantan, terdapat empat spesies Kepiting Bakau yang tertangkap di perairan Bandengan Kendal, yaitu Scylla serrata, Scylla tranquebarica, Scylla paramamosain dan Scylla olivacea, perbandingan betina dan jantan 1:1,19. Ukuran lebar karapas berkisar antara 43,75-165,5 mm dengan berat berkisar antara 23-660 g. Hubungan lebar karapas dengan berat bersifat allometrik negatif. Nilai faktor kondisi yang didapatkan berkisar 1,66–1,189. Tingkat kematangan gonad kepiting betina didominasi oleh TKG I dan II, pada bulan November 2018 – Februari 2019 di perairan Bandengan Kendal belum terjadi masa puncak pemijahan. ABSTRACT: Mud crabs (Scylla sp.) are important marine resources in Indonesia and demand for mud crabs tends to increase, both in local and foreign markets. Increased demand for Mangrove Crabs can cause disruption to the population of crabs in nature. This study to examine the morphometrics of Mud Crabs (Scylla sp.) Which include the size of the width of the Mud Crab carapace, the relationship between carapace width and weight, sex ratio, condition factors and the level of maturity of the Mud Crab in Bandengan Kendal waters from November 2018 to February 2019. The descriptive explorative methods was used in this research. The results showed that the number of mud crabs caught from November 2018 to February 2019 was 1914, consisting of 897 females and 1017 males, there were four species of mud crabs caught in Kendal Bandengan waters, namely Scylla serrata, Scylla tranquebarica, Scylla paramamosain and Scylla olivacea, comparison of females and males 1: 1,19. Carapace widths range from 43.75 - 165.5 mm with weights ranging from 23 - 660 g. The relationship between carapace width and weight are negative allometric. The obtained condition factor values range from 1.66 - 1.189. The maturity level of female crab gonads are dominated by TKG I and II, thus it is suspected that in November 2018 - February 2019 in the waters of Bandengan Kendal, the spawning peak has not yet occurred.

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