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| Native range | All suitable habitat | Point map | Year 2050 |
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| This map was computer-generated and has not yet been reviewed. |
| Tenualosa ilisha AquaMaps Data sources: GBIF OBIS |
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Tenualosa ilisha
Picture by Randall, J.E.
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Picture by Randall, J.E.
Bangladesh country information
Common names:
Ilish, Jatka, ইলিশ
Occurrence: native
Salinity: freshwater
Abundance: | Ref:
Importance: commercial | Ref:
Aquaculture: | Ref:
Regulations: | Ref:
Uses: no uses
Comments: Hilsa forms a single large inland fishery. Immature hilsa, known as 'jatka', are fished extensively in rivers near Chandpur between February and May. This indiscriminate fishing of 'jatka' is detrimental to the hilsa fishery. Hence, 'jatka' needs to be protected. Large-sized fish mainly contribute to the monsoon fisheries (May to October) and smaller individuals form the fishery during the winter months (November to January). Genetic research (population genetics) for the aquaculture sector is being done in the country (Ref. 55327). Also Ref. 188.
National Checklist:
Country Information: https://www.cia.gov/library/publications/resources/the-world-factbook/geos/bg.html
National Fisheries Authority:
Occurrences: Occurrences Point map
Main Ref: Rahman, A.K.A., 1989
National Database:
Occurrence: native
Salinity: freshwater
Abundance: | Ref:
Importance: commercial | Ref:
Aquaculture: | Ref:
Regulations: | Ref:
Uses: no uses
Comments: Hilsa forms a single large inland fishery. Immature hilsa, known as 'jatka', are fished extensively in rivers near Chandpur between February and May. This indiscriminate fishing of 'jatka' is detrimental to the hilsa fishery. Hence, 'jatka' needs to be protected. Large-sized fish mainly contribute to the monsoon fisheries (May to October) and smaller individuals form the fishery during the winter months (November to January). Genetic research (population genetics) for the aquaculture sector is being done in the country (Ref. 55327). Also Ref. 188.
National Checklist:
Country Information: https://www.cia.gov/library/publications/resources/the-world-factbook/geos/bg.html
National Fisheries Authority:
Occurrences: Occurrences Point map
Main Ref: Rahman, A.K.A., 1989
National Database:
Common names from other countries
Classificatie / Names Lokale namen | Synoniemen | Catalog of Fishes(Genus, Soort(en)) | ITIS | CoL | WoRMS | Cloffa
> Clupeiformes (Herrings) > Dorosomatidae (Gizzard shads and sardinellas)
Etymology: Tenualosa: Latin, tenuis = thin + Latin, alausa = a fish cited by Ausonius and Latin, halec = pickle, dealing with the Greek word hals = salt; it is also the old Saxon name for shad = "alli" ; 1591 (Ref. 45335).
More on author: Hamilton.
Etymology: Tenualosa: Latin, tenuis = thin + Latin, alausa = a fish cited by Ausonius and Latin, halec = pickle, dealing with the Greek word hals = salt; it is also the old Saxon name for shad = "alli" ; 1591 (Ref. 45335).
More on author: Hamilton.
Environment: milieu / climate zone / depth range / distribution range Ecologie
marien; zoet water; brak water; anadroom (Ref. 127664); diepte ? - 200 m. Tropical; 34°N - 5°N, 42°E - 97°E (Ref. 188)
Verspreiding Landen | FAO regio's | Ecosystemen | Voorkomen | Point map | Introducties | Faunafri
Indian Ocean: Persian Gulf eastward to Myanmar, including western and eastern coasts of India. Reported from the Gulf of Tonkin, Viet Nam (Ref. 9706). Reported in Tigris River basin and probably other rivers of southern Iran (Ref. 39702).
Lengte bij maturiteit / Grootte / Gewicht / Leeftijd
Maturity: Lm 31.3, range 18 - ? cm
Max length : 60.0 cm SL mannelijk / geslacht onbekend; (Ref. 188); common length : 36.0 cm SL mannelijk / geslacht onbekend; (Ref. 4832); common length :42 cm TL (female); max. gepubliceerd gewicht: 680.00 g (Ref. 4832); max. gepubliceerd gewicht: 680.00 g; max. gerapporteerde leeftijd: 5 Jaren (Ref. 43871)
Max length : 60.0 cm SL mannelijk / geslacht onbekend; (Ref. 188); common length : 36.0 cm SL mannelijk / geslacht onbekend; (Ref. 4832); common length :42 cm TL (female); max. gepubliceerd gewicht: 680.00 g (Ref. 4832); max. gepubliceerd gewicht: 680.00 g; max. gerapporteerde leeftijd: 5 Jaren (Ref. 43871)
Korte beschrijving Determinatiesleutels | Morfologie | Morfometrie
Dorsale stekels (totaal) : 0; Dorsale zachte stralen (totaal) : 18 - 21; Anale stekels: 0; Anale zachte stralen: 18 - 23. Belly with 30 to 33 scutes. Distinct median notch in upper jaw. Gill rakers fine and numerous, about 100 to 250 on lower part of arch. Fins hyaline. A dark blotch behind gill opening, followed by a series of small spots along flank in juveniles. Color in life, silver shot with gold and purple.
Schooling in coastal waters and ascending rivers for as much as 1200 km (usually 50-100 km). Migration though is sometimes restricted by barrages. Hilsa far up the Ganges and other large rivers seem to be permanent river populations. Feeds on plankton, mainly by filtering, but apparently also by grubbing on muddy bottoms. Breeds mainly in rivers during the southwest monsoon (also from January to February to March). Artificial propagation has been partially successful in India (Ref. 4832). Known to be a fast swimmer, covering 71 km in one day (Ref. 12203). Marketed fresh or dried-salted.
Levenscyclus en paargedrag Maturiteit | Voortplanting | Paaien | Eieren | Fecunditeit | Larven
Breeds mainly in rivers, upstream to about 50 km or even over 1000 km as in the Ganges (younger fishes may breed in the tidal zone of rivers). In some rivers the migration is restricted by barrages; there is some evidence that hilsa far up the Ganges and other large rivers, although migrating upstream to spawn, are permanent river populations that do not descend to the sea. The main breeding season is during the southwest monsoon, with a shorter season from January to February or March.
Hoofdreferentie
Upload your references | Referenties | Coördinator | Medewerkers
Whitehead, P.J.P., 1985. FAO Species Catalogue. Vol. 7. Clupeoid fishes of the world (suborder Clupeoidei). An annotated and illustrated catalogue of the herrings, sardines, pilchards, sprats, shads, anchovies and wolf-herrings. FAO Fish. Synop. 125(7/1):1-303. Rome: FAO. (Ref. 188)
Status op de Rode Lijst van het IUCN (Ref. 130435: Version 2024-2)
Niet bedreigd (LC) ; Date assessed: 23 January 2013
Gevaar voor de mens
Harmless
Gebruik door de mens
Visserij: van minder commercieel belang; Aquacultuur: experimenteel
FAO(visserij: productie; publication : search) | FishSource | Sea Around Us
Meer informatie
Population dynamics
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Estimates based on models
Preferred temperature (Ref. 115969): 21.3 - 28, mean 24.7 (based on 224 cells).
Fylogenetische diversiteitsindex (Ref. 82804): PD50 = 0.5312 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00891 (0.00790 - 0.01006), b=3.05 (3.02 - 3.08), in cm Total Length, based on LWR estimates for this species (Ref. 93245).
Trofisch niveau (Ref. 69278): 2.9 ±0.29 se; based on food items.
Weerstandsvermogen (Ref. 120179): Gemiddeld, minimale populatieverdubbelingstijd 1,4-4,4 jaar (K=0.3-1.2; tmax=5; tm=2; Fec=220,000).
Prior r = 0.59, 95% CL = 0.39 - 0.89, Based on 4 data-limited stock assessments.
Fishing Vulnerability (Ref. 59153): Low to moderate vulnerability (29 of 100).
Climate Vulnerability (Ref. 125649): Very high vulnerability (84 of 100).