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Research articles

ScienceAsia 45(2019): 154-158 |doi: 10.2306/scienceasia1513-1874.2019.45.154


Hilsa (Clupeidae: Tenualosa ilisha) predators in the marine and riverine ecosystems of Bangladesh


Md Shahadat Hossaina,*, SM Sharifuzzamana, Sayedur Rahman Chowdhurya, Muhammad Abdur Roufb, Md Delwer Hossainc

 
ABSTRACT:     The predators of hilsa shad (Tenualosa ilisha) in the marine and riverine ecosystems of Bangladesh were identified. Data on the availability of hilsa shad in the stomach contents of top carnivore fishes were collected from 324 individuals with diversified occupations and hilsa-dominated geographical locations. Data analysis revealed that 15 predatory fishes preyed on hilsa, of which tuna, mackerel, shark, Indian threadfin, red snapper and fourfinger threadfin are dominant predators of adult hilsa in the Bay of Bengal, while freshwater shark, giant catfish, river catfish, humped featherback, stripped snakehead and giant snakehead are the main predators of juvenile hilsa in the Padma-Meghna river systems of Bangladesh. Further research leading to predation observations in controlled experiments can provide novel and robust information on predator-prey interactions in the context of ecosystem-based fisheries management and conservation initiatives.

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a Institute of Marine Sciences, University of Chittagong, Chittagong 4331 Bangladesh
b Fisheries and Marine Resource Technology Discipline, Khulna University, Khulna 9208 Bangladesh
c Department of Fisheries, University of Rajshahi, Rajshahi 6205 Bangladesh

* Corresponding author, E-mail: hossainms@yahoo.com

Received 5 Jul 2018, Accepted 29 Dec 2018