Reproductive potential and stock status of the anadromous shad, Tenualosa ilisha (Hamilton, 1822): Implications for managing its declining fisheries in northern Bay of Bengal bordering India

2021 ◽  
Vol 44 ◽  
pp. 101753
Author(s):  
Vettath Raghavan Suresh ◽  
Sandhya Kavitha Mandhir ◽  
Aliyamintakath Muhammadali Sajina ◽  
Ranjan Kumar Manna ◽  
Jayanta Mukherjee ◽  
...  
Keyword(s):  
Bay Of Bengal ◽  
Reproductive Potential ◽  
Stock Status ◽  
Tenualosa Ilisha ◽  
Northern Bay Of Bengal

scholarly journals Role of lunar phases, rainfall, and wind in predicting Hilsa shad ( Tenualosa ilisha ) catch in the northern Bay of Bengal

2019 ◽  
Author(s):  
Sandip Giri ◽  
Sugata Hazra ◽  
Pramit Ghosh ◽  
Amit Ghosh ◽  
Sourav Das ◽  
...  
Keyword(s):  
Bay Of Bengal ◽  
Lunar Phases ◽  
Tenualosa Ilisha ◽  
Northern Bay Of Bengal

Interplay between reproduction and age selective harvesting: A case study of Hilsa (Tenualosa ilisha) fish at Sundarban estuary of northern Bay of Bengal, India

2019 ◽  
Vol 12 (02) ◽  
pp. 1950023 ◽  
Author(s):  
Debaldev Jana ◽  
Sachinandan Dutta ◽  
G. P. Samanta
Keyword(s):  
Bay Of Bengal ◽  
Sexual Maturation ◽  
Mathematical Problem ◽  
Fish Population ◽  
The Other ◽  
Selective Harvesting ◽  
Tenualosa Ilisha ◽  
Northern Bay Of Bengal ◽  
Sexually Mature

New offspring due to sexual reproduction is not an instantaneous process from its birth, it takes time to be sexually mature. On the other hand, harvesting of commercially profitable fish population before the perfect size or weight is reached is not only a commercial loss but also risks the extinction of the population. Now, we discuss the issue of Ganges-Brahmaputra-Meghna basin, northern Bay of Bengal for the age-selective harvesting of Hilsa shad (Tenualosa ilisha) which lays eggs after its sexual maturation. Harvesting of hilsa before its sexual maturation risks its extinction and due to lamer body weight, it is not a commercially profitable policy. This is a reality of Sundarban estuary for hilsa fish harvesting, therefore, biologically and economically both India and Bangladesh are facing several problems. Empirical data of Frasergunje Fishing Harbor shows a clear picture as the supporting document of this mathematical problem.

Prediction of monthly Hilsa (Tenualosa ilisha) catch in the Northern Bay of Bengal using Bayesian structural time series model

2020 ◽  
Vol 39 ◽  
pp. 101456
Author(s):  
Sandip Giri ◽  
Soumik Purkayastha ◽  
Sugata Hazra ◽  
Abhra Chanda ◽  
Isha Das ◽  
...  
Keyword(s):  
Time Series ◽  
Bay Of Bengal ◽  
Time Series Model ◽  
Structural Time Series ◽  
Tenualosa Ilisha ◽  
Structural Time ◽  
Northern Bay Of Bengal

Diet Composition and Intensity of Feeding of Tenualosa ilisha (Hamilton, 1822) Occurring in the Northern Bay of Bengal, India

2013 ◽  
Vol 67 (1) ◽  
pp. 33-37 ◽  
Author(s):  
Sachinandan Dutta ◽  
Sourav Maity ◽  
Subhra Bikash Bhattacharyya ◽  
Jetendra Kumar Sundaray ◽  
Sugata Hazra
Keyword(s):  
Bay Of Bengal ◽  
Diet Composition ◽  
Tenualosa Ilisha ◽  
Northern Bay Of Bengal ◽  
Intensity Of Feeding

Growth overfishing of hilsa shad in Hooghly-Bhagirathi river system, India: Assessment and management implications

2020 ◽  
Vol 67 (2) ◽  
Author(s):  
A. M. Sajina ◽  
V. R. Suresh ◽  
K. M. Sandhya ◽  
J. Mukherjee ◽  
R. K. Manna ◽  
...  
Keyword(s):  
Bay Of Bengal ◽  
Coastal Waters ◽  
River System ◽  
Economic Loss ◽  
Management Implications ◽  
Fishery Resource ◽  
Bhagirathi River ◽  
Tenualosa Ilisha ◽  
Northern Bay Of Bengal

Juvenile fishing of the migratory hilsa shad, Tenualosa ilisha (Hamilton, 1822), is rampant in the coastal waters of northern Bay of Bengal and associated Hooghly-Bhagirathi river system. The average annual economic loss due to this was estimated at `497.84 million (around US$ 7.8 million) necessitating urgent need for managing it to maximise benefits from the fishery as it forms a major fishery resource in the region. Factors leading to juvenile fishing and the possible solutions to control the resultant biological and economic loss are discussed.

Habitat modelling of juvenile Hilsa Tenualosa ilisha (Clupeiformes) in the coastal ecosystem of the northern Bay of Bengal, Bangladesh

2014 ◽  
Vol 54 (2) ◽  
pp. 203-213 ◽  
Author(s):  
M. S. Hossain ◽  
S. Sarker ◽  
S. M. Sharifuzzaman ◽  
S. R. Chowdhury
Keyword(s):  
Bay Of Bengal ◽  
Coastal Ecosystem ◽  
Habitat Modelling ◽  
Tenualosa Ilisha ◽  
Northern Bay Of Bengal

scholarly journals Low CO2 evasion rate from the mangrove-surrounding waters of the Sundarbans

2021 ◽  
Author(s):  
Anirban Akhand ◽  
Abhra Chanda ◽  
Kenta Watanabe ◽  
Sourav Das ◽  
Tatsuki Tokoro ◽  
...  
Keyword(s):  
Bay Of Bengal ◽  
Dissolved Inorganic Carbon ◽  
Monsoon Season ◽  
Buffering Capacity ◽  
Marine Water ◽  
High Temporal Resolution ◽  
Post Monsoon Season ◽  
Biogeochemical Parameters ◽  
Northern Bay Of Bengal ◽  
The Sundarbans

AbstractGlobally, water bodies adjacent to mangroves are considered significant sources of atmospheric CO2. We directly measured the partial pressure of CO2 in water [pCO2(water)] and related biogeochemical parameters with high temporal resolution, covering both diel and tidal cycles, in the mangrove-surrounding waters around the northern Bay of Bengal during the post-monsoon season. Mean pCO2(water) was marginally oversaturated in two creeks (470 ± 162 µatm, mean ± SD) and undersaturated in the adjoining estuarine stations (387 ± 58 µatm) compared to atmospheric pCO2, and was considerably lower than the global average. We further estimated the pCO2(water) and buffering capacity of all possible sources of the mangrove-surrounding waters and concluded that their character as a CO2 sink or weak source is due to the predominance of marine water from the Bay of Bengal with low pCO2 and high buffering capacity. Marine water with high buffering capacity suppresses the effect of pCO2 increase within the mangrove system and lowers the CO2 evasion even in creek stations. The δ13C of dissolved inorganic carbon (DIC) in the mangrove-surrounding waters indicated that the DIC sources were a mixture of mangrove plants, pore-water, and groundwater, in addition to marine water. Finally, we showed that the CO2 evasion rate from the estuaries of the Sundarbans is much lower than the recently estimated world average. Our results demonstrate that mangrove areas having such low emissions should be considered when up-scaling the global mangrove carbon budget from regional observations.

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