Sustainable exploitation of hilsa fish (Tenualosa ilisha) population in Bangladesh: Modeling and policy implications

Bala, B. K.; Arshad, Fatimah Mohamed; Alias, Emmy Farha; Sidique, Shaufique Fahmi; Noh, Kusairi Mohd; Rowshon, M. K.; Islam, Qamarul; Islam, MN

doi:10.1016/j.ecolmodel.2014.03.013

Cited by 18 publications

(9 citation statements)

References 15 publications

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“…Like with other fish from the sea, most of the As in Hilsha is likely to be organoarsenic compounds, such as arsenobetaine and arsenocholine. Hilsha is the single largest and most valuable fish in Bangladesh, contributing between 22-25% of the total fish production in the country [14]. It is the national fish of Bangladesh and is very popular across the country.…”

Section: Discussionmentioning

confidence: 99%

Intake of arsenic and selenium in a Bangladeshi population investigated using inductively coupled plasma mass spectrometry

Al-Rmalli

Jenkins

Haris

2017

BSI

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Abstract. Millions of people in Bangladesh are exposed to high concentration of the toxic element arsenic (As) through drinking water and consumption of foods. It has also been reported that Bangladeshis have a low intake of the essential element selenium (Se), which is known to be important as an antioxidant and has been suggested to counteract the toxicity of As. We report here on total intake of As and Se in a Bangladeshi population, based on inductively coupled plasma mass spectrometric (ICP-MS) analysis of a range of Bangladeshi foods. The total daily intake of As and Se from foods was estimated to be 74.2 and 87.7 µg/day, respectively. If As from water, used for drinking and cooking rice, is included the TDI increases to 385 µg of total As per day. An important finding of our study, contrary to suggestions given in other reports, is that the Bangladeshi diet does not appear to be deficient in Se and this may explain why the blood Se concentrations in Bangladeshis is similar to the USA population. This requires further investigation and detailed dietary and human biomonitoring studies on the Bangladeshi population should be conducted. Rice and fish were the main sources of dietary As and Se for Bangladeshis. Leafy vegetables could also be a significant contributor of high concentration of As in the Bangladeshi diet. The flesh and eggs of Hilsha (Tenualosa ilisha) species of fish were found to contain particularly high levels of total arsenic (range 0.77-6.15 mg/kg) although this is likely to be dominated by the non-toxic organoarsenic species.

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Section: Discussionmentioning

confidence: 99%

Intake of arsenic and selenium in a Bangladeshi population investigated using inductively coupled plasma mass spectrometry

Al-Rmalli

Jenkins

Haris

2017

BSI

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“…However, no data have been published beyond 2009, and much of this information is conflicting or limited in reliability, so trends in abundance are still unclear. While some stock assessments have concluded that hilsa are overfished, exploitation rates are highly uncertain and other risk assessments suggest that populations – although vulnerable to overfishing – may not yet be in decline ( Amin et al, 2004 ; Mome and Arnason, 2007 ; BOBLME, 2010 ; Sharma, 2012 ; Bala et al, 2014 ).…”

Section: Resultsmentioning

confidence: 99%

“…In the absence of any institutional improvements, modelling suggests that increased levels of fishing effort on adult or jatka populations could lead to a collapse of hilsa stocks in Bangladesh within one to two decades ( Bala et al, 2014 ; Fernandes et al, 2015 ; Mome and Arnason, 2007 ; Sharma, 2012 ). Given the Government’s aim to increase hilsa production, and given industry trends, the marine fishery – both artisanal and industrial sectors – looks set to continue expanding ( DoF, 2002 ).…”

Section: Resultsmentioning

confidence: 99%

Developing a frame of reference for fisheries management and conservation interventions

et al. 2018

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“…It’s the largest single species of fish in Bangladesh and can be found in almost every river, estuary, and marine environment in the country [1], contributing 351 thousand metric tons (MT) [2] in total fish production annually. According to [3] hilsa represents approximately 1% of Bangladesh’s GDP with 500 – 600 million Tk. earning as foreign currency from the export of hilsa.…”

Section: Introductionmentioning

confidence: 99%

Full title:Age analysis and growth patterns ofTenualosa ilishausing otolith examination and length-weight relationships from different regions of Bangladesh

Ahmed

Ahammad

Shahjahan

et al. 2018

Preprint

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Conceptualization, A.K.S.A.; supervision, A.K.S.A.; methodology, M.B.U.A.; manuscript 18 editing, M.S.; sample collection, B.K.D; data arrangement, M.F.R; investigation, M.A.A.; 19 funding acquisition, A.B.; writing -original draft preparation, M.B.U.A.; writing -review and 20 editing, M.A.A.; project administration, Y.M. 2 21 Abstract 22The assessment of age and growth patterns provides crucial information on numerous 23 aspects of the population dynamics in fish, which can, in turn, be used to determine a 24 sustainable fishing rate and inform effective resource management practices. However, 25 studies on the age and growth pattern of Tenualosa ilisha (commonly referred to as hilsa) are 26 plagued by a lack of essential information; addressing this data gap is the aim of the present 27 study. Six diverse habitats across Bangladesh were chosen as sampling sites for hilsa 28 collection. For age determinations, the lunar rings in the otolith of the hilsa fish that are 29 periodically-deposited in accordance with the lunar cycle were used to reflect 14-day 30 increments of time. The length and weight of each fish were recorded prior to otolith 31 extraction. The resulting otoliths were polished to enable the visualization and quantification 32 of their lunar rings with a high-magnification microscope. Except for the Kali River and 33 Gaglajur Haor samples, the age of the fish correlated strongly with both their length and 34 weight (r > 0.95; p < 0.05). Again, aside from those from the Kali River and Gaglajur Haor, 35 all of the samples exhibited positive allometric growth patterns (b > 3) with the fish from the 36 Tetulia River being the most positive (b = 3.48). The causes these variations are not yet 37 clearly understood, however; the nutrient availability, environmental variation, and genetic-38 environmental interactions are likely contributors to the diversities displayed by the hilsa 39 from different regions of Bangladesh.40 41

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Sustainable exploitation of hilsa fish (Tenualosa ilisha) population in Bangladesh: Modeling and policy implications

Cited by 18 publications

References 15 publications

Intake of arsenic and selenium in a Bangladeshi population investigated using inductively coupled plasma mass spectrometry

Intake of arsenic and selenium in a Bangladeshi population investigated using inductively coupled plasma mass spectrometry

Developing a frame of reference for fisheries management and conservation interventions

Full title:Age analysis and growth patterns ofTenualosa ilishausing otolith examination and length-weight relationships from different regions of Bangladesh

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