scholarly journals Small-scale mud crab Scylla sp. fattening in Shyam-nagar, Satkhira

2016 ◽  
Vol 44 (1) ◽  
pp. 163-166
Author(s):  
Md Mijanur Rahman
Keyword(s):  
Small Scale ◽  
Mud Crab

Abstract not availableBangladesh J. Zool. 44(1): 163-166, 2016

scholarly journals Crab Fattening in Bangladesh: A Socio-economic Perspective

2015 ◽  
Vol 6 (1) ◽  
pp. 145-152 ◽  
Author(s):  
Z Ferdoushi
Keyword(s):  
Young People ◽  
Natural Resources ◽  
Economic Condition ◽  
Coastal Region ◽  
The Other ◽  
Small Scale ◽  
Mud Crab ◽  
Economic Perspective ◽  
Negative Perception ◽  
Southwest Part

Thestudy was conducted to assess the socio-economic condition of the crab fatteners in the southwest part of Bangladesh.About 52% farmers have an experience of 5 to 10 yearsof indicating that involvement in mud crab fattening is the recent development and innovation in those areas.The Hindus in the coastal region found to have more interest in crab farming. On the other hand, about 27% Muslim were also found to involve in this farming.Comparativelyhigher involvements of Hindus farmers were found in Khulna region. Mostly young people found to have more involvement ranging from 26 to 35 years old which constituted more than 38% of the total interviewed population. About 40% farmers showedhigher satisfaction bycrab fattening while,fewfarmers reported some negative perception. Most of their farmingwere small scale and the farmers also accounted the higher seed cost with low profitability. However, well developedco-operation and partnershipbetween farmers, fishermen, middlemen and wholesaler can also improve this sector for sustainable development.DOI: http://dx.doi.org/10.3329/jesnr.v6i1.22056 J. Environ. Sci. & Natural Resources, 6(1): 145-152 2013

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

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

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

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

scholarly journals Incorporating the Ecological, Socio-economic and Institutional Conceptual Model Framework for Sustainable Management of Small-scale Mud Crab (Scylla serrata) Fishery in Western Seram Regency, Indonesia

2021 ◽  
Vol 19 (3) ◽  
pp. 207-219
Author(s):  
Yuliana Natan ◽  
◽  
Johannes M.S. Tetelepta ◽  
Jesaja A. Pattikawa ◽  
Ong T.S. Ongkers ◽  
...  
Keyword(s):  
Conceptual Model ◽  
Sustainable Management ◽  
Economic Value ◽  
State Level ◽  
Scylla Serrata ◽  
Small Scale ◽  
Consumer Attitude ◽  
Mud Crab ◽  
Model Framework ◽  
Management Actions

Mud crab Scylla serrata of Kotania Bay and Pelita Jaya Bay of Western Seram District, has been harvested by local fishermen for more than 25 years. The mud crab has high economic value, and there is always a market for this fishery. The economic dependence of the fishermen forces them to harvest this resource extensively. No existing management strategy and extensive exploitation leads to unsustainable conditions of this fishery. With inadequate data condition, the Driver-Pressure-State-Impact-Response (DPSIR) model constructs an ecological, social-economy, and institutional conceptual model framework for sustainable management of this fishery. The driving force (D) in this fishery comes from the local fishers harvesting the mud crab. The two most sensitive attributes that affected mud crab sustainability from Rapfish analysis were used as state-level of DPSIR methodology. The result shows that the most sensitive variables from ecological, socio-economy, and institution were: caught before maturity, mud crab size, consumer attitude towards sustainability, just management, government quality, and monitoring and reporting, respectively. It was concluded that this conceptual model allows a better understanding of how the mud crab S. serrata system works and management actions taken at different system components. This conceptual model framework can be a useful tool to incorporate the participation of stakeholders, managers, and scientists in the process of a sustainable management plan.

Estimated growth of the mud crab Scylla olivacea in the Ranong mangrove ecosystem, Thailand, based on a tagging and recapture study

2002 ◽  
Vol 53 (7) ◽  
pp. 1083 ◽  
Author(s):  
S. M. Moser ◽  
D. J. Macintosh ◽  
S. Pripanapong ◽  
N. Tongdee
Keyword(s):  
Transition Matrix ◽  
Carapace Width ◽  
Mangrove Ecosystem ◽  
Small Scale ◽  
Mud Crab ◽  
Estimation Of Parameters ◽  
Final Size ◽  
Baited Traps ◽  
In Captivity ◽  
Males And Females

Growth of the mud crab Scylla olivacea in the Ranong mangrove ecosystem was estimated using a size-transition matrix. Male (n = 1284) and female (n = 1069) mud crabs were tagged with externally visible and numbered T-tags and then released. Tagged crabs caught by commercial small-scale fishermen were measured and re-released. Data from 664 male and 463 female recaptures were obtained in total. Moult increment in the investigated size range (5–13 cm external carapace width) was independent of size and sex. The size distribution of mud crab moult increments was fitted to a normal distribution, resulting in a mean moult increment of 1.67 ± 0.48 cm (s.d.). This result was used to estimate the proportion of males and females moulting, and the selectivity of the baited traps used to catch them. Trap selectivity among the tagged crabs was uniform for both male and female crabs. Also, the proportion of those moulting decreased with size in the same manner for both sexes. The predictions of growth from the final size-transition matrix were in agreement with the observed growth of a subset of tagged crabs not used in the estimation of parameters in the size-transition matrix and growth of crabs reared in captivity over a period of 2 months.

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

2015 ◽  
Vol 15 (2) ◽  
Author(s):  
M. Tahmid, Achmad Fahrudin Dan Yusli Wardiatno
Keyword(s):  
Growth Parameters ◽  
Economic Value ◽  
Data Retrieval ◽  
Fishing Effort ◽  
Scylla Serrata ◽  
Small Scale ◽  
Natural Mortality ◽  
Mud Crab ◽  
Mangrove Crab ◽  
The Status

ABSTRAKKepiting bakau (Scylla serrata) merupakan salah satu potensi komoditas perikanan skala kecilyang memiliki nilai ekonomi tinggi. Kelimpahan populasi dipengaruhi oleh upaya penangkapan dankondisi ekosistem mangrove sebagai habitat utamanya. Produksi kepiting bakau di Teluk Bintanmenurun dan penyebabnya belum diketahui dengan pasti. Oleh karena itu, perlu dilakukan kajiantentang biologi kepiting bakau di Teluk Bintan. Penelitian ini bertujuan untuk mengkaji statuspopulasi kepiting bakau yang meliputi struktur ukuran, parameter pertumbuhan dan laju mortalitasdan eksploitasi. Pengambilan data kepiting bakau dilakukan dengan pendekatan yaitu fisher-basedsurvey. 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 betinamencapai 48,06%, keduanya hampir setengah dari tangkapan total, ini menunjukkan bahwa alattangkap yang digunakan belum selektif. CW∞ jantan mencapai 176,93 mm lebih tinggi dari kepitingbetina 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 angkakematian alami (M) jantan = 0,5566 dan kematian akibat penangkapan (F) jantan = 0,6434 sedangkanM betina = 0,59 dan F betina = 0,41. Laju eksploitasi (E) kepiting jantan mencapai 53,62%, ini dapatdikatakan telah terjadi lebih tangkap atau over eksploitasi.Kata kunci: Scylla serrata, parameter pertumbuhan, struktur ukuran, mangrove and Teluk BintanABSTRACTMud crab (Scylla serrata) is one of the potential of small-scale fishery commodities that havehigh economic value. The abundance of the population is affected by the fishing effort and conditionsmangrove ecosystem as its main habitat. Mud crab production in the Gulf of Bintan declined and thecause is not known with certainty. Therefore, it is necessary to study on the biology of mud crab in theGulf of Bintan. This study aims to assess the status of mangrove crab population that includes the sizestructure, parameters of growth and the rate of mortality and exploitation. Data retrieval is done witha mangrove crab fisher-based survey. The results showed that the size of mud crab caught fromcarapace width (CW) 64-172 mm, the size of the young phase male crabs caught females reached46.62% and reached 48.06%, both are almost half of the total catch, it indicates that fishing gearused is not selective. CW∞ males reach 176.93 mm higher than the female crabs of 169.58 mm, butinstead value koefesien K males (0.360) is smaller than females (0.390), so that the growth of femalemud crabs faster than males. Estimated natural mortality rates (M) male = 0.5566 and deaths fromarrest (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

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

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

<p><em>Mud crab (<span style="text-decoration: underline;">Scylla</span> <span style="text-decoration: underline;">serrata</span>) is one of </em><em>small scale fisheries commodity </em><em>that have high economic value and typically associated with </em><em>good mangrove ecosystem</em><em>. A </em><em>habitat degradation</em><em> </em><em>will cause</em><em> a serious impact on the existence of mud crab population. The puropse of this study was to assess the ecological quality of </em><em>mud crab habitat condition</em><em> </em><em>on </em><em>B</em><em>intan </em><em>B</em><em>ay’s mangrove ecosystem</em><em>. </em><em>Ecological data collection was conducted by </em><em>using </em><em>plots line transect for mangrove and </em><em>the mud carb </em><em>data collection</em><em> by using fishermen catch </em>(<em>fisher based survey</em>)<em>. </em><em>The results showed the value of habitat quality index (HQI) of mud crab (<span style="text-decoration: underline;">Scylla</span> <span style="text-decoration: underline;">serrata</span>) ranged from 52-82 w</em><em>hich mean</em><em> in the “m</em><em>oderate</em><em>”</em><em> category</em><em> (index value 43-66) and "good" (index value 67-90). </em><em>It show</em><em>ed</em><em> that Bintan Bay’s mangrove </em><em>e</em><em>cosystems </em><em>was good enough to support the viability of mud crab. Habitat quality </em><em>had</em><em> a linier impact on body weight gain (</em><em>R<sup>2 </sup>= 99</em><em>.</em><em>7</em><em>8%) </em><em>and carapace width (</em><em>R<sup>2</sup>=</em><em> </em><em>99</em><em>.</em><em>21%</em><em>)</em><em>.</em><em> This showed that higher the index value of habitat quality, the size of the body weight and carapace width </em><em>will</em><em> increases.</em><em></em></p><p><em> </em><strong><em>Keywords</em></strong><em>: Scylla serrata, habitat quality, ecology, mangroves, and Bintan Bay</em></p>

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