Mud crab fishery in climate vulnerable coastal Bangladesh: an analysis towards sustainable development

Rahman, Shahinur; Haque, Sadika; Galib, Shams Muhammad; Islam, M. A.; Parvez, Md. Taskin; Hoque, M. Nazmul; Wahab, M.A.; Egna, Hillary; Brown, Christopher L.

doi:10.1007/s10499-020-00523-2

Cited by 35 publications

(46 citation statements)

References 51 publications

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“…Education is considered important in fishery management, including for the conservation of resources (Albright & Lucas, 2021), but respondents surveyed in this study had a low level of education. Poor education of fishermen in Bangladesh is primarily due to early engagement in income generating activities to assist their families economically (Rahman et al, 2020).…”

Section: Discussionmentioning

confidence: 99%

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A case study of illegal fishing causes during seasonal fishery closure in Kaptai Lake, Bangladesh

Shalehin

Parvez

Lucas

et al. 2022

Fisheries Management Eco

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Growing evidence shows that conservation strategies such as fishing bans may adversely affect the livelihoods of low-income communities, which often encourages community members to fish illegally. In this study, we determined the underlying factors that influenced fishermen to engage in illegal fishing during the closed season in the largest lake of Bangladesh, Kaptai Lake. Out of 231 fishermen interviewed, 46.8% were engaged in illegal fishing during the closed season. Engagement in illegal fishing was positively related to receipt of a financial loan and negatively related to receipt of a government subsidy and secondary occupation of the fishermen. Financial gain by selling the fish was the prime motive for illegal fishing. Surprisingly, fishermen received a 36% lower price for illegally harvested fish during the closed season (mean price ± SD, BDT 95.8 ± 64.9), when compared to that during the open fishing season (BDT 151.5 ± 64.9). Mid-level actors secured 99%-154% more profit during the closed season. This study shows that multiple factors are important for the engagement of fishermen in illegal fishing, and therefore, an integrated conservation policy considering all causative factors should be employed to achieve more effective conservation in the region's inland waters.

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Section: Discussionmentioning

confidence: 99%

“…government banks, usually 9% interest rate; cf. >20% for NGO) (Islam et al, 2017; Rahman et al, 2020). Moreover, these NGOs demand weekly instalments of repayment in most cases that require fishermen to earn and repay the money regularly.…”

Section: Discussionmentioning

confidence: 99%

A case study of illegal fishing causes during seasonal fishery closure in Kaptai Lake, Bangladesh

Shalehin

Parvez

Lucas

et al. 2022

Fisheries Management Eco

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“…Another reason for the insignificant variation might be the high adapting capability of the mud crabs ( Ali et al., 2020 ). Unlike fish, mud crabs are very hardy and can tolerate a wide range of variations in environmental factors without any morphological changes ( Rahman et al., 2020 ). Fish, being more vulnerable to environmental fluctuation, change their morphometrics very quickly, as documented in previous investigations ( Swain et al., 1991 , Wimberger, 1992 ; Turan et al., 2004 ).…”

Section: Discussionmentioning

confidence: 99%

Comparative growth and morphometric assessment between cultures of wild and hatchery-produced mud crabs

Sarower

Mahmud-Al-Hasan

Rahman

et al. 2021

Heliyon

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This paper reports the comparative growth, nutritional performance, and morphometric variation between wild and hatchery-reared juvenile mud crabs (Scylla olivacea) in earthen ponds. The crabs were fed daily with boiled tilapia paste at a feeding rate of 5-8% body weight for the first two weeks, followed by feeding with chopped eviscerated tilapia until termination of the experiment. Selected phenotypic trains, including carapace width (CW), carapace length (CL) and abdominal width (AW), were measured weekly. The protein content of the muscle (21.13%), gill (13.51%) and egg (43.28%) were significantly higher in the hatchery-sourced compared to wild female crabs (muscle ¼ 19.15%; gill ¼ 10.09%; egg ¼ 38.15%). Likewise, the hatchery sourced crabs exhibited higher lipid content in the muscle (2.45-2.51%) and eggs (7.51%) compared to the wild counterparts (muscle ¼ 1.45-1.47%; egg ¼ 6.15%). These findings suggested a superior nutritional quality of the hatchery-reared compared to the wild-sourced crabs. Although some selected phenotypic traits did not vary among the wild and hatchery-reared crabs (p < 0.05), their survival rates varied significantly depending on the stocking density (p < 0.05). Overall, the findings suggest that the growth characteristics of the hatchery produced and wild-sourced crab were similar, which will help to remove the misconception among the crab farmers about the hatchery seeds and promote diversification of the crab production system for long-term sustainability.

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“…In addition, the importance of S. olivacea has increased as a potential export earning aquatic resource, just after the shrimp ( Penaeus monodon ), and thus ranked the second highest in earning foreign currency for Bangladesh (DoF, 2016). However, till now, the wild catch of juvenile and brood crabs has remained a regular practice for coastal farming and trading in the national and international markets (Ferdoushi & Xiang‐Guo, 2013; Rahman et al., 2020).…”

Section: Introductionmentioning

confidence: 99%

Population dynamics of mud crab, Scylla olivacea (Herbst, 1796) from the Sundarbans of Bangladesh

Sakib

Ahmmed

Washim

et al. 2022

Aquaculture Fish & Fisheries

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The Sundarbans mangrove regions are the home of the mud crab (Scylla olivacea) business, as forest areas are potential places for random crab harvesting, trading, and exporting overseas seafood markets. Since the mud crab was being captured on a large‐scale in the wild for various purposes, estimation of population parameters were immediately done in terms of body weight and length‐frequency data collected from different locations in the forest of southwestern Bangladesh to understand the status of the stock. Recruitment pattern, growth parameters, mortality rates, and exploitation levels (E) were estimated to understand the population dynamics of S. olivacea. Asymptotic carapace widths (CW∝) were 14.70 and 14.18 cm, and growth co‐efficients (K) were 0.47 and 0.50 year–1 for male and female S. olivacea, respectively. The fishing mortalities were 2.32 and 1.13 year–1 and natural mortalities were 1.39 and 1.46 year–1 for males and females, respectively. Year‐round recruitment of this species takes place in the wild with a peak between June and November. The E for S. olivacea was found to be 0.63 for the male and 0.44 for the female. In summery, the stock of S. olivacea is found to be overexploited in the Sundarbans of Bangladesh. Therefore, mud crab resources should be taken into consideration under suitable fisheries management policies to conserve this national treasure in this delta. It is supposed that the findings will draw the attention of the scientists in the fields of aquatic biology, ecology, and management of the Sundarbans in restoring the mud crab population.

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Mud crab fishery in climate vulnerable coastal Bangladesh: an analysis towards sustainable development

Cited by 35 publications

References 51 publications

A case study of illegal fishing causes during seasonal fishery closure in Kaptai Lake, Bangladesh

A case study of illegal fishing causes during seasonal fishery closure in Kaptai Lake, Bangladesh

Comparative growth and morphometric assessment between cultures of wild and hatchery-produced mud crabs

Population dynamics of mud crab, Scylla olivacea (Herbst, 1796) from the Sundarbans of Bangladesh

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