Primary Production and Fish Yield Estimation in the Meghna River System, Bangladesh

Ahmed, Khan Kamal Uddin; Ahmed, S.U.; Haldar, Goutam; Hossain, Md. Rayhan; Ahmed, T.

doi:10.33997/j.afs.2005.18.2.002

Cited by 6 publications

(14 citation statements)

References 6 publications

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“…The higher DO values indicate higher productivity and might play a significant role for the migration of hilsa". The result was like the findings reported by Ahmed et al [22] and "they recorded the mean value of DO as 6.7±0.81 mg/L in the Meghna River". Dissolved Oxygen in the study (Table 2) results the growth and reproduction of fishes in these rivers.…”

Section: Dissolved Oxygen (Do)supporting

confidence: 90%

“…The concentration of nitrate 0.02-1.0 ppm is lethal to many fish species [35, > 1.0 ppm is somewhat lethal for many warm water fishes and < 0.02 ppm is acceptable [53] whereas Santhosh and Singh [54] recommended that nitrite concentration in water should not exceed 0.5 mg/L. Similar findings were observed by Ahmed et al [22] who reported that "ammonia concentration was found to be elevated and ranged from 0.1 to 0.6 mg/L and showed a gradual decreasing trend from the upward to the downward stretches in the Meghna River systems". The nitrate concentration was found within the acceptable range.…”

Section: Water Nutrientssupporting

confidence: 53%

“…The transparency of the fresh water (35 to 45 cm) is suitable for aquatic environment" [30]. Ahmed et al [22] found the similar results were from the Meghna River system and the transparency ranged from 12 to 90 cm with a mean of 34.2 ± 18.08 cm at different stations.…”

Section: Transparencymentioning

confidence: 85%

“…The studied results were like the findings of Boyd [47] stated that "water with a pH of less than 6.5 or more than 9-9.5 for a long period is harmful to the reproduction and growth of fish". Ahmed et al [22] were found to be neutral to alkaline pH (7.0-8.0) in the Meghna River. The permissible range of pH was between 6.4 and 8.5 [48].…”

Section: Phmentioning

confidence: 95%

“…2). With the increasing the distance, the high positive correlation between air and water temperature in [22], who recorded that "water temperature of the Meghna River at surface level ranged between 24.1 and 30.5°C with a mean of 27.6 ±0.68°C". Bhaumik et al [23] studied "values of physicochemical parameters for hilsa migration, breeding, rearing and estimated that the ideal water temperature ranged from 29.3-30.2°C for breeding activities and for the nursery activities of hilsa the temperature ranged from 29.8-30.8°C in the Hooghly-Bhagirathi River system".…”

Section: Temperaturementioning

confidence: 99%

See 4 more Smart Citations

Estimation of Water Quality in the Major Nursery Grounds of Hilsa: Insights from Plankton and Nutrient Regimes

Flura

Moniruzzaman²,

Alam³

et al. 2023

AJFAR

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The biological and physicochemical attributes of a river ecosystem usually reveal the status of the consequential species richness index of the biodiversity and subsistent aquatic life. Towards appraisal of water quality, physicochemical parameters (i.e., temperature, pH, DO, transparency alkalinity and hardness), water nutrients (nitrate, phosphate) and concentration of Chlorophyll a were determined. Samples were collected from six hilsa sanctuaries. The pH value was found slightly alkaline (7.6±0.6) and transparency was ranged (44.4±10.6 cm) followed by alkalinity (112.4 ±26.4 mg/L), hardness (304.5±69.5 mg/L), CO2 (10.3±1.2 mg/L), water temperature (25.6±0.8 ºC), nitrate (0.005±0.01 mg/L), phosphate (0.002±0.0004 mg/L) and DO (7.7±1.1 mg/L). Chlorophyll a was estimated (8.21 ± 2.3 µg/L), which represents the biomass of phytoplankton. The largest quantity of plankton (both in number and taxa) was found in the Meghna River basin as a natural food at station 1 (St-1) and Station 4 (St-4) compared to the other stations. Twelve groups (families) of phytoplankton comprising 26 genera and zooplankton having 14 genera were identified at all sampling stations. The density of plankton was found to be maximum (46×102 cells L-1) at Station 5 (St-5) and while minimum (24×102 cells L-1) at Station 6 (St-6) during the investigation. This evaluation of the physical, chemical, and biological profile of the environment in the country's sanctuary zones provides obvious evidence that is crucial for understanding the Hilsa Fisheries Management Action Plan and for the sustainable management of Hilsa Fishery.

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Section: Dissolved Oxygen (Do)supporting

confidence: 90%

Section: Water Nutrientssupporting

confidence: 53%

Section: Transparencymentioning

confidence: 85%

Section: Phmentioning

confidence: 95%

Section: Temperaturementioning

confidence: 99%

See 3 more Smart Citations

Estimation of Water Quality in the Major Nursery Grounds of Hilsa: Insights from Plankton and Nutrient Regimes

Flura

Moniruzzaman²,

Alam³

et al. 2023

AJFAR

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Assessment of the hilsa breeding ground in Meghna River estuary, Bangladesh for sustainable conservation

Hasan,

Rahman,

Pramanik

et al. 2024

Academia Biology

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Hilsa, a significant fish species in Bangladesh, undergoes migratory patterns between the sea and rivers. This study, conducted from 2018 to 2020 in four locations (Ramnewaz, Hazirhat, Janata Bazar, and Sakuchia) along the River Meghna in Monpura, aimed to assess the effectiveness and reevaluate a previously identified hilsa breeding ground. Variations in plankton composition and abundance were observed over multiple years and locations within the estuary. The presence of plankton in the hilsa's gut during the spawning season emphasized its importance in the fish's diet. The research focused on the length-frequency distribution and lengthweight relationship of hilsa larvae (Jatka), studying their abundance and dispersion during high and low tides. Positive allometric growth in Jatka suggested the breeding area's good health. Additionally, the study monitored the spent rate and maturity stages of hilsa, demonstrating the effectiveness of conservation initiatives. The existing management strategy, safeguarding breeding grounds and sanctuaries, contributed to a consistent increase in the hilsa population. The satisfactory parameters observed in the Monpura hilsa breeding ground indicated its stable and ongoing functionality. Consequently, the research findings are essential evidence and a valuable reference for future studies, policies, strategies, and the sustainable management of hilsa fishery resources.

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Evaluation of Histopathological Alterations in the Liver and Kidney of Olive Barb (Puntius sarana, Hamilton 1822) as an Indicator of the Surma River’s Pollution

Zaman¹,

Khalil²,

Hossain³

et al. 2023

ase

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Water pollution poses a global hazard to aquatic biota and ecological sustainability, causing a hazard to aquatic organisms such as fish. The aim of this study was to evaluate the impact of toxic chemical contaminants on histopathological biomarkers in the liver and kidney of olive barb (Puntius sarana) collected from the Surma River in comparison to a control group of fish. The histological bio-monitoring assessment involved the sampling of thirty (30) table-sized fish collected from the four-sampling sites (i. Kajir Bazar, ii. Keane Bridge, iii. Shahjalal Bridge and iv. Burhanuddin Majar) of the Surma River on a monthly basis during the period of September 2019 to February 2020. Twenty (20) table-sized fish of the same species were reared in the Fish Disease Diagnosis and Pharmacology Laboratory, which has a controlled water quality system. In the present study, the river temperature was found to range from 19.7±1.57°C to 30.00±1.29°C. Dissolved oxygen of the surface water was observed to range from 4.15±0.31 to 4.82±0.67 ppm. The pH was found to range from 7.42±0.33 to 6.50±0.12. We observed several pathological changes viz., haemorrhage, lipid droplet, hypertrophy and hyperplasia, erythrocyte infiltration into blood sinusoid, pyknosis and hepatocyte degeneration in the liver tissues of P. sarana. The histopathological analysis of the kidney showed tubular degeneration of the distal tubule, tubular degeneration of the proximal tubule, melanomacrophage centre, glomerular shrinkage, vacuolisation, necrosis and haemorrhage. The evidence of pathological alterations in the liver and kidney of olive barb P. sarana appeared to be a useful biomarker to assess the impact of the toxicity of water pollution in the Surma River.

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Primary Production and Fish Yield Estimation in the Meghna River System, Bangladesh

Cited by 6 publications

References 6 publications

Estimation of Water Quality in the Major Nursery Grounds of Hilsa: Insights from Plankton and Nutrient Regimes

Estimation of Water Quality in the Major Nursery Grounds of Hilsa: Insights from Plankton and Nutrient Regimes

Assessment of the hilsa breeding ground in Meghna River estuary, Bangladesh for sustainable conservation

Evaluation of Histopathological Alterations in the Liver and Kidney of Olive Barb (Puntius sarana, Hamilton 1822) as an Indicator of the Surma River’s Pollution

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