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Bhuyan Md. Simul

Impact of climate change on sea-going fishers: a case study from Paikgachha Upazila, Khulna, Bangladesh

Md Minarul Hoque, Afifat Khanam Ritika, Md. Simul Bhuyan

DOI: https://doi.org/10.46909/alse-583183

ABSTRACT. Climate change can severely impact fishermen’s community due to the nature of their profession. This study investigates the impacts of climate change on sea-going fishers in Paikgachha Upazila, Khulna, Bangladesh. A total of 60 randomly selected fishers were interviewed using semi-structured questionnaires and focus group discussions to assess climate-induced changes in their livelihoods. Field data reveal that 100% of the respondents experienced reduced fishing duration due to frequent storms, erratic sea behaviour, and early seasonal changes. Around 40% of fishers have shifted to alternative professions, and approximately 40% of local residents have migrated over the past 20 years due to climate-related livelihood disruption. In 2022, 90% of fishers lost their prawn farms owing to saline water intrusion and elevated water temperatures. Climatic trend analysis using Bangladesh Meteorological Department data confirms an increasing pattern in mean temperature per year (+0.014℃) and rainfall (+7.22 mmyr-1) in coastal regions over the past three decades. The findings underscore the urgent need for targeted adaptation strategies, safety protocols, and livelihood diversification to support the resilience of this vulnerable population.

Keywords: climate change; coastal Bangladesh; fishing duration; profession shift; salinity; sea-going fishers.

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Preliminary study of the amino acids of horseshoe crabs (Carcinoscorpius rotundicauda) from the Cox’s Bazar Coast, Bay of Bengal, Bangladesh

Md. Simul Bhuyan, Md. Tarikul Islam, Vinmoy Mondal

DOI: https://doi.org/10.46909/alse-582179

ABSTRACT. Carcinoscorpius rotundicauda is an ancient marine arthropod with significant ecological and biomedical importance due to its unique physiological features and bioactive compounds. Despite this critical role in pharmaceutical applications, especially in endotoxin detection assays, the amino acid (AA) profile of C. rotundicauda remains underexplored, especially the population in the northern Bay of Bengal. This study investigated the AA profile of C. rotundicauda collected from the Cox’s Bazar coast of Bangladesh, with the goal of assessing its nutritional value and biomedical potential. A preliminary biochemical analysis was conducted using samples collected from a mangrove-dominated estuarine zone. A rigorous analytical protocol involving hydrolysis, filtration, and liquid chromatography–tandem mass spectrometry was employed to accurately quantify the essential and non-essential amino acids. The results revealed a total AA content of 2.2%, with leucine (0.5%), isoleucine (0.3%), and proline (0.3%) being the most abundant. Interestingly, aspartic acid was not detected, and trace levels of methionine (0.006%) and histidine (0.0006%) were observed, suggesting unique metabolic adaptations in this species compared to other marine arthropods. These findings are significant as they represent the first detailed account of the AA profile of C. rotundicauda from Bangladesh’s coastal waters. The dominance of branched-chain amino acids such as leucine and isoleucine highlights the species’ potential role in supporting protein synthesis and metabolic regulation. This biochemical insight opens new possibilities for the species’ application in the nutraceutical and pharmaceutical industries, while also underlining the need for its conservation amid increasing habitat degradation.

Keywords: amino acid profiling; biomedical applications; Carcinoscorpius rotundicauda; nutritional composition.

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Impact of climate change on sea-going fishers: a case study from Paikgachha Upazila, Khulna, Bangladesh

Sep 29, 2025 |

Md Minarul Hoque, Afifat Khanam Ritika, Md. Simul Bhuyan

DOI: https://doi.org/10.46909/alse-583183

ABSTRACT. Climate change can severely impact fishermen’s community due to the nature of their profession. This study investigates the impacts of climate change on sea-going fishers in Paikgachha Upazila, Khulna, Bangladesh. A total of 60 randomly selected fishers were interviewed using semi-structured questionnaires and focus group discussions to assess climate-induced changes in their livelihoods. Field data reveal that 100% of the respondents experienced reduced fishing duration due to frequent storms, erratic sea behaviour, and early seasonal changes. Around 40% of fishers have shifted to alternative professions, and approximately 40% of local residents have migrated over the past 20 years due to climate-related livelihood disruption. In 2022, 90% of fishers lost their prawn farms owing to saline water intrusion and elevated water temperatures. Climatic trend analysis using Bangladesh Meteorological Department data confirms an increasing pattern in mean temperature per year (+0.014℃) and rainfall (+7.22 mmyr-1) in coastal regions over the past three decades. The findings underscore the urgent need for targeted adaptation strategies, safety protocols, and livelihood diversification to support the resilience of this vulnerable population.

Keywords: climate change; coastal Bangladesh; fishing duration; profession shift; salinity; sea-going fishers.

read more

Preliminary study of the amino acids of horseshoe crabs (Carcinoscorpius rotundicauda) from the Cox’s Bazar Coast, Bay of Bengal, Bangladesh

Aug 8, 2025 |

Md. Simul Bhuyan, Md. Tarikul Islam, Vinmoy Mondal

DOI: https://doi.org/10.46909/alse-582179

ABSTRACT. Carcinoscorpius rotundicauda is an ancient marine arthropod with significant ecological and biomedical importance due to its unique physiological features and bioactive compounds. Despite this critical role in pharmaceutical applications, especially in endotoxin detection assays, the amino acid (AA) profile of C. rotundicauda remains underexplored, especially the population in the northern Bay of Bengal. This study investigated the AA profile of C. rotundicauda collected from the Cox’s Bazar coast of Bangladesh, with the goal of assessing its nutritional value and biomedical potential. A preliminary biochemical analysis was conducted using samples collected from a mangrove-dominated estuarine zone. A rigorous analytical protocol involving hydrolysis, filtration, and liquid chromatography–tandem mass spectrometry was employed to accurately quantify the essential and non-essential amino acids. The results revealed a total AA content of 2.2%, with leucine (0.5%), isoleucine (0.3%), and proline (0.3%) being the most abundant. Interestingly, aspartic acid was not detected, and trace levels of methionine (0.006%) and histidine (0.0006%) were observed, suggesting unique metabolic adaptations in this species compared to other marine arthropods. These findings are significant as they represent the first detailed account of the AA profile of C. rotundicauda from Bangladesh’s coastal waters. The dominance of branched-chain amino acids such as leucine and isoleucine highlights the species’ potential role in supporting protein synthesis and metabolic regulation. This biochemical insight opens new possibilities for the species’ application in the nutraceutical and pharmaceutical industries, while also underlining the need for its conservation amid increasing habitat degradation.

Keywords: amino acid profiling; biomedical applications; Carcinoscorpius rotundicauda; nutritional composition.

read more

© by the authors; licensee Journal of Applied Life Sciences and Environment, Iasi, Romania. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0)