Senegal country information

Common names: Itass, Yaboî tass, Yaboï tass
Occurrence: native
Salinity: brackish
Abundance: | Ref:
Importance: highly commercial | Ref: FAO, 1992
Aquaculture: | Ref:
Regulations: | Ref:
Uses: live export: yes;
Comments: Known from Atlantic Ocean (Ref. 188), Sine-Saloum estuary (Ref. 97744) and Casamance River estuary (Ref. 33587).
National Checklist:
Country Information: httpss://www.cia.gov/library/publications/resources/the-world-factbook/geos/sg.html
National Fisheries Authority: https://www.refer.sn/sngal_ct/eco/oeps/
Occurrences: Occurrences Point map
Main Ref: Pandaré, D., S. Niang, H. Diadhiou and B. Capdeville, 1997
National Database:

Classification / Names

Actinopterygii (ray-finned fishes) > Clupeiformes (Herrings) > Clupeidae (Herrings, shads, sardines, menhadens) > Dorosomatinae
Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL

Common names from other countries

Grande allache, Machuelo, Herring, ... more

Main reference

Whitehead, P.J.P. 1985. (Ref. 188)
References | Biblio | Coordinator | Collaborators

Size / Weight / Age

Max length : 30.0 cm SL male/unsexed; (Ref. 188); common length : 25.0 cm SL male/unsexed; (Ref. 188); max. published weight: 927.00 g (Ref. 3808)

Length at first maturity
L_m 13.4, range 11 - 19.5 cm

Environment

Marine; brackish; pelagic-neritic; oceanodromous (Ref. 51243); depth range 0 - 80 m (Ref. 27000)

Climate / Range

Subtropical; 24°C - ? (Ref. 54872), preferred 24°C (Ref. 107945); 46°N - 23°S, 17°W - 36°E (Ref. 54872)

Distribution

Atlantic Ocean: eastern Atlantic Ocean from Gibraltar southward to Angola, with a single specimen reported from Walvis Bay, Namibia (Ref. 188, 81269). Also known from Mediterranean Sea in the southern and eastern parts, penetrating also the Suez Canal (Ref. 188).
Countries | FAO areas | Ecosystems | Occurrences | Introductions

Short description

Dorsal spines (total): 0; Dorsal soft rays (total): 18-21; Anal spines: 0; Anal soft rays: 17 - 23. Diagnosis: Body elongate, but variable in depth, belly fairly sharply keeled; total scutes 31-34 (Ref. 188, 81269). Lower gillrakers 70-166 (Ref. 188, 81269). Upper pectoral fin rays white on outer side, the membrane between black (Ref. 188). Sardinella maderensis resembles S. aurita, but pelvic fin with 1 unbranched and 7 branched rays and no black spot on hind part of gill cover, but a faint gold or black area just behind gill opening (Ref. 188). It is distinguished from S. rouxi by having more lower gillrakers, only 30-40 in S. rouxi, and the caudal fin grey, its tips almost black vs. yellow in S. rouxi (Ref. 188).

Forms schools in coastal waters, preferring waters of 24°C. Feeds on a variety of small planktonic invertebrates, fish larvae and phytoplankton. Breeds during the warm season (July-September). Juveniles and adults show clear north-south migrations in the Gabon-Congo-Angola sector of their range and also in the Sierra Leone-Mauritania sector, each area having nurseries. The movements are correlated with the seasonal upwelling. Marketed fresh, frozen or salted.

IUCN Red List Status (Ref. 115185)

Vulnerable (VU) (A2d)

Threat to humans

Harmless

Human uses

Fisheries: highly commercial; bait: usually

More information

Countries
FAO areas
Ecosystems
Occurrences
Introductions
Stocks
Ecology
Diet
Food items
Food consumption
Ration

Common names
Synonyms
Metabolism
Predators
Ecotoxicology
Reproduction
Maturity
Spawning
Fecundity
Eggs
Egg development

Age/Size
Growth
Length-weight
Length-length
Length-frequencies
Morphometrics
Morphology
Larvae
Larval dynamics
Recruitment
Abundance

References
Aquaculture
Aquaculture profile
Strains
Genetics
Allele frequencies
Heritability
Diseases
Processing
Mass conversion

Collaborators
Pictures
Stamps, Coins
Sounds
Ciguatera
Speed
Swim. type
Gill area
Otoliths
Brains
Vision

Tools

Special reports

Check for Aquarium maintenance | Check for Species Fact Sheets | Check for Aquaculture Fact Sheets

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Summary page | Point data | Common names | Photos

Internet sources

Estimates of some properties based on models

Phylogenetic diversity index (Ref. 82805)
PD₅₀ = 0.5000 many relatives (e.g. carps) 0.5 - 2.0 few relatives (e.g. lungfishes)

Trophic Level (Ref. 69278)
3.2 ±0.38 se; Based on food items.

Resilience (Ref. 69278)
Medium, minimum population doubling time 1.4 - 4.4 years (K=0.34; tm=3; tmax=6)

Vulnerability (Ref. 59153)
Low to moderate vulnerability (33 of 100)

Price category (Ref. 80766)
Medium

Sardinella maderensis (Lowe, 1838)