Biological Studies of the Mud Crab, Scylla serrata (Forskal) of the Sundarbans Mangrove Ecosystem in Khulna Region of Bangladesh

The study of population biology of mud crab Scylla serrata is necessary to analyse the population dynamics, such as growth of crabs, size distribution, mortality and exploitation rates of S. serrata. Population biology data collection was carried out from March to June 2016 at estuary and silvofishery areas of three stations (Mayangan, Tanjung Tiga and Blanakan villages). Data were analyzed using analytical methods of FISAT-II (FAO-ICLARM Stock Assessment Toool II)instruments. The results showed the growth of S. serrata male in Subang distric was positive allometric and the female was negative allometric. Growth coefficient (K) ranged from 0.21 to 0.43 in the estuary and from 0.28 to 0.89 in silvofishery area. Exploitation rate in the silvofishery area has been above the maximum exploitation rate. The size distribution of S. serrata in Subang district has the highest frequency at class interval of 106-110 mm (male) and of 101-105 mm. The highest abundance of mature female crabs is in May.Keywords : population biology, Scylla serrata, Subang District

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Panjang Karapas dan Laju Pertumbuhan Spesifik Kepiting Bakau (Scylla serrata) yang diberi Jenis Pakan Berbeda di Area Ekowisata Kampung Kepiting, Bali

Journal of Marine and Aquatic Sciences ◽

10.24843/jmas.2018.v4.i01.38-46 ◽

2017 ◽

Vol 4 (1) ◽

pp. 38

Author(s):

Ni Desak Putu Ida Suryani ◽

Pande Gde Sasmita Julyantoro ◽

Ayu Putu Wiweka Krisna Dewi

Keyword(s):

Water Quality ◽

Mangrove Ecosystem ◽

Quality Parameters ◽

Quality Parameter ◽

Scylla Serrata ◽

Coastal Vegetation ◽

Water Quality Parameter ◽

Mud Crab ◽

Different Types ◽

Critical Components

Mangrove forest is tropical coastal vegetation that grow on muddy and sandy soils which affected by sea tides. One of important commercial species that live in mangrove ecosystem is the mud crab (Scylla serrata). Feed and water quality have been considered as critical components for supporting the growth both of weight and carapace length of this species. This study was conducted from January to February 2017 in the area of ??Ecotourism Kampung Kepiting, Bali. The influence of different natural feed such as Jerbung shrimp (Penaeus merguiensis), Mollusca, lemuru fish (Sardinella lemuru) and sea worms (Nereis sp.) on the growth performance of the mud crab were investigated. Water quality parameter data such as pH, DO, temperature, salinity and ammonium were also collected. The obtained data were analyzed by using variance analysis of Statistical Product and Service Solutions (SPSS) version 21. The result showed that the use of different types of feed have no effect on the length of carapace, but it has significantly influence on the specific growth rate of mud crab. Finally, different types of the given feeding were still resulted in the save range of water quality parameters for mud crab culture.

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Kajian Struktur Ukuran Dan Parametr Populasi Kepiting Bakau (Scylla serrata) di Ekosistem Mangrove Teluk Bintan, Kepulauan Riau

JURNAL BIOLOGI TROPIS ◽

10.29303/jbt.v15i2.192 ◽

2017 ◽

Vol 15 (2) ◽

Author(s):

M. Tahmid, Achmad Fahrudin Dan Yusli Wardiatno

Keyword(s):

Size Structure ◽

Growth Parameters ◽

Carapace Width ◽

Data Retrieval ◽

Mangrove Ecosystem ◽

Fishing Effort ◽

Scylla Serrata ◽

Small Scale ◽

Mud Crab ◽

Mangrove Crab

ABSTRAKKepiting bakau (Scylla serrata) merupakan salah satu potensi komoditas perikanan skala kecil yang memiliki nilai ekonomi tinggi. Kelimpahan populasi dipengaruhi oleh upaya penangkapan dan kondisi ekosistem mangrove sebagai habitat utamanya. Produksi kepiting bakau di Teluk Bintan menurun dan penyebabnya belum diketahui dengan pasti. Oleh karena itu, perlu dilakukan kajian tentang biologi kepiting bakau di Teluk Bintan. Penelitian ini bertujuan untuk mengkaji status populasi kepiting bakau yang meliputi struktur ukuran, parameter pertumbuhan dan laju mortalitas dan eksploitasi. Pengambilan data kepiting bakau dilakukan dengan pendekatan yaitu fisher-based survey. Hasil penelitian menunjukkan ukuran kepiting bakau yang tertangkap mulai dari lebar karapas (CW) 64-172 mm, ukuran fase muda kepiting jantan yang tertangkap mencapai 46,62% dan betina mencapai 48,06%, keduanya hampir setengah dari tangkapan total, ini menunjukkan bahwa alat tangkap yang digunakan belum selektif. CW∞ jantan mencapai 176,93 mm lebih tinggi dari kepiting betina sebesar 169,58 mm, namun sebaliknya nilai koefesien K jantan (0,360) lebih kecil dari betina (0,390), sehingga pertumbuhan kepiting bakau betina lebih cepat dari jantan. Perkiraan angka kematian alami (M) jantan = 0,5566 dan kematian akibat penangkapan (F) jantan = 0,6434 sedangkan M betina = 0,59 dan F betina = 0,41. Laju eksploitasi (E) kepiting jantan mencapai 53,62%, ini dapat dikatakan telah terjadi lebih tangkap atau over eksploitasi. Kata kunci: Scylla serrata, parameter pertumbuhan, struktur ukuran, mangrove and Teluk Bintan ABSTRACTMud crab (Scylla serrata) is one of the potential of small-scale fishery commodities that have high economic value. The abundance of the population is affected by the fishing effort and conditions mangrove ecosystem as its main habitat. Mud crab production in the Gulf of Bintan declined and the cause is not known with certainty. Therefore, it is necessary to study on the biology of mud crab in the Gulf of Bintan. This study aims to assess the status of mangrove crab population that includes the size structure, parameters of growth and the rate of mortality and exploitation. Data retrieval is done with a mangrove crab fisher-based survey. The results showed that the size of mud crab caught from carapace width (CW) 64-172 mm, the size of the young phase male crabs caught females reached 46.62% and reached 48.06%, both are almost half of the total catch, it indicates that fishing gear used is not selective. CW∞ males reach 176.93 mm higher than the female crabs of 169.58 mm, but instead value koefesien K males (0.360) is smaller than females (0.390), so that the growth of female mud crabs faster than males. Estimated natural mortality rates (M) male = 0.5566 and deaths from arrest (F) male = 0.6434 while M females female F = 0.59 and = 0.41. The rate of exploitation (E) male crabs reached 53.62%, can be said to have occurred over fishing or over-exploitation. Keywords: Scylla serrata, growth parameters, structure size, mangrove and bay Bintan

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Organochlorine concentrations in aquatic organisms from different trophic levels of the Sundarbans mangrove ecosystem and their implications for human consumption

Environmental Pollution ◽

10.1016/j.envpol.2019.04.120 ◽

2019 ◽

Vol 251 ◽

pp. 681-688 ◽

Cited By ~ 2

Author(s):

Asunción Borrell ◽

Victoria Tornero ◽

Dola Bhattacharjee ◽

Alex Aguilar

Keyword(s):

Aquatic Organisms ◽

Mangrove Ecosystem ◽

Trophic Levels ◽

Human Consumption ◽

Sundarbans Mangrove ◽

The Sundarbans

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HABITAT QUALITY MUD CRAB (Scylla serrata) IN MANGROVE ECOSYSTEM OF BINTAN BAY, BINTAN DISTRIC, RIAU ISLANDS

Jurnal Ilmu dan Teknologi Kelautan Tropis ◽

10.29244/jitkt.v7i2.11025 ◽

2016 ◽

Vol 7 (2) ◽

Author(s):

M. Tahmid ◽

Achmad Fahrudin ◽

Yusli Wardiatno

Keyword(s):

Body Weight ◽

Data Collection ◽

Habitat Quality ◽

Carapace Width ◽

Mangrove Ecosystem ◽

The Body ◽

Scylla Serrata ◽

Small Scale ◽

Mud Crab ◽

Index Value

Mud crab (Scylla serrata) is one of small scale fisheries commodity that have high economic value and typically associated with good mangrove ecosystem. A habitat degradation will cause a serious impact on the existence of mud crab population. The puropse of this study was to assess the ecological quality of mud crab habitat condition on Bintan Bay’s mangrove ecosystem. Ecological data collection was conducted by using plots line transect for mangrove and the mud carb data collection by using fishermen catch (fisher based survey). The results showed the value of habitat quality index (HQI) of mud crab (Scylla serrata) ranged from 52-82 which mean in the “moderate” category (index value 43-66) and "good" (index value 67-90). It showed that Bintan Bay’s mangrove ecosystems was good enough to support the viability of mud crab. Habitat quality had a linier impact on body weight gain (R2 = 99.78%) and carapace width (R2= 99.21%). This showed that higher the index value of habitat quality, the size of the body weight and carapace width will increases. Keywords: Scylla serrata, habitat quality, ecology, mangroves, and Bintan Bay

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Assessment of Gear Efficiency for Harvesting Artisanal Giant Freshwater Prawn (Macrobrachium Rosenbergii de Man) Fisheries from the Sundarbans Mangrove Ecosystem in Bangladesh

10.31219/osf.io/cts59 ◽

2019 ◽

Author(s):

Biplab Kumar Shaha ◽

Md. Mahmudul Alam ◽

H. M. Rakibul Islam ◽

Lubna Alam ◽

Alokesh Kumar Ghosh ◽

...

Keyword(s):

Macrobrachium Rosenbergii ◽

Mangrove Ecosystem ◽

Economic Life ◽

Freshwater Prawn ◽

Small Scale ◽

Giant Freshwater Prawn ◽

Gear Efficiency ◽

De Man ◽

Sundarbans Mangrove ◽

The Sundarbans

The Sundarnbans mangrove forest has been an immense source of aquatic resources from time immemorial. Among the resources, harvesting of Giant Freshwater Prawn (Macrobrachium rosenbergii de Man 1879) plays an important role in the economy of the country, therefore, this investigation was carried out to assess the Gear Efficiency for Harvesting Artisanal Giant Freshwater Prawn Fisheries from the Sundarbans Mangrove Ecosystem in Bangladesh. Four types of non-mechanized crafts made of fourteen types of wood were found in harvesting Giant Freshwater Prawn. Crafts were varied from 6.25±0.35 to 8.2±0.71 m in length, 1.1±0.14 to 1.75±0.36 m in breadth and 0.65±1.07 to 1.55±3.16 m in depth with a carrying capacity of 0.40 - 1.00 MT with an economic life of 10±2.11 years. A total of eight types of gears, namely, Hookline, Behundijal, Badhajal, Charpata, Chandijal, Gillnet, Kathijal and KhalPata were found in Giant Freshwater Prawn fishing. Among them the Hookline was the only main primary active Giant Freshwater Prawn fishing gear while the rest of the seven gears were multi-species gears which harvest Giant Freshwater Prawn as a by-catch. Only 13.6% of 1,989 fishers were found to use Hookline; the rest, 86.4% of fishers used the seven other gears. They only harvest 3.24% Giant Freshwater Prawn as a bycatch. The highest daily harvest volume per boat (kg day-1 boat-1) was 1.00±0.96 for the Kathijal followed by 0.99±0.27 for the Badhajal and 0.99±0.42 for the Hookline. The highest annual catch per boat (kg boat-1 yr-1) which was 172.80±0.29 was recorded for the Hookline followed by 172.24±0.54 for the Chandijal and the lowest (152.08±0.21) for the Khalpata. Total annual catch by all the eight gears surveyed was estimated at 1318.60±0.37 kg from 1,428 unit gears, 545 individual boats and 1,989 individual fishers. Based on the above scenario, Hookline showed the best performance among the 8 gears used for Giant Freshwater Prawn harvesting in the Sundarbans by the small-scale artisanal fishery. It is believed that the findings and the recommendations of this study will be helpful to policy makers in improving the current status of Giant Freshwater Prawn fishery and relevant livelihood as well as conserving the SME ecosystem

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Trace element accumulation and trophic relationships in aquatic organisms of the Sundarbans mangrove ecosystem (Bangladesh)

The Science of The Total Environment ◽

10.1016/j.scitotenv.2015.12.046 ◽

2016 ◽

Vol 545-546 ◽

pp. 414-423 ◽

Cited By ~ 36

Author(s):

Asunción Borrell ◽

Victoria Tornero ◽

Dola Bhattacharjee ◽

Alex Aguilar

Keyword(s):

Trace Element ◽

Aquatic Organisms ◽

Mangrove Ecosystem ◽

Trophic Relationships ◽

Element Accumulation ◽

Sundarbans Mangrove ◽

The Sundarbans ◽

Trace Element Accumulation

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Molting mud crab (Scylla serrata) in the mangrove ecosystem service

IOP Conference Series Earth and Environmental Science ◽

10.1088/1755-1315/454/1/012125 ◽

2020 ◽

Vol 454 ◽

pp. 012125

Author(s):

M Basyuni ◽

R Indrawan ◽

L A P Putri ◽

E Yusraini ◽

I Lesmana

Keyword(s):

Ecosystem Service ◽

Mangrove Ecosystem ◽

Scylla Serrata ◽

Mud Crab

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Status of Biological Studies and Aquaculture Development of the Mud Crab, Scylla serrata, in China: An Experimental Ecological Studies

Aquaculture International ◽

10.1007/s10499-005-1887-5 ◽

2005 ◽

Vol 13 (5) ◽

pp. 459-468 ◽

Cited By ~ 24

Author(s):

Wang Gui-zhong ◽

Li Shao-jing ◽

Zeng Chao-shu ◽

Lin Shu-jun ◽

Kong Xiang-hui ◽

...

Keyword(s):

Scylla Serrata ◽

Mud Crab ◽

Ecological Studies ◽

Biological Studies ◽

Aquaculture Development

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POPULATION BIOLOGY OF MUD CRAB Scylla serrata - Forsskal, 1775 IN MANGROVE ECOSYSTEM OF SUBANG DISTRICT, WEST JAVA

Jurnal Ilmu dan Teknologi Kelautan Tropis ◽

10.29244/jitkt.v9i1.17928 ◽

2017 ◽

Vol 9 (1) ◽

pp. 173-184

Author(s):

Ayu Annisa Kumalah ◽

Yusli Wardiatno ◽

Isdradjad Setyobudiandi ◽

Achmad Fahrudin

Keyword(s):

Size Distribution ◽

Population Biology ◽

Stock Assessment ◽

Mangrove Ecosystem ◽

Mature Female ◽

Scylla Serrata ◽

Mud Crab ◽

Class Interval ◽

Growth Coefficient ◽

Exploitation Rate

The study of population biology of mud crab Scylla serrata is necessary to analyse the population dynamics, such as growth of crabs, size distribution, mortality and exploitation rates of S. serrata. Population biology data collection was carried out from March to June 2016 at estuary and silvofishery areas of three stations (Mayangan, Tanjung Tiga and Blanakan villages). Data were analyzed using analytical methods of FISAT-II (FAO-ICLARM Stock Assessment Toool II)instruments. The results showed the growth of S. serrata male in Subang distric was positive allometric and the female was negative allometric. Growth coefficient (K) ranged from 0.21 to 0.43 in the estuary and from 0.28 to 0.89 in silvofishery area. Exploitation rate in the silvofishery area has been above the maximum exploitation rate. The size distribution of S. serrata in Subang district has the highest frequency at class interval of 106-110 mm (male) and of 101-105 mm. The highest abundance of mature female crabs is in May.Keywords : population biology, Scylla serrata, Subang District

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