Kenya country information

Common names: Gray bichir, Nagir, Nagiri
Occurrence: native
Salinity: freshwater
Abundance: | Ref:
Importance: | Ref:
Aquaculture: | Ref:
Regulations: | Ref:
Uses: live export: yes;
Comments: Polypterus senegalus senegalus is known from Lake Turkana (Ref. 41374, 52331, 52871).
National Checklist:
Country Information: https://www.cia.gov/library/publications/resources/the-world-factbook/geos/ke.html
National Fisheries Authority: http://www.recoscix.org/openscrn.htm
Occurrences: Occurrences Point map
Main Ref: Seegers, L., L. De Vos and D.O. Okeyo, 2003
National Database:

Common names from other countries

Bichir, Sénégal bichir, Keskla, ... more

Classification / Names প্রচলিত নাম সমূহ | প্রতিনাম সমূহ | Catalog of Fishes(গণ , প্রজাতি ) | ITIS | CoL | WoRMS | Cloffa

> Polypteriformes (Bichirs) > Polypteridae (Bichirs)
Etymology: Polypterus: Greek, poly = a lot of + Greek, pteron = wing, fin (Ref. 45335); senegalus: Named after M. d'Arnaud, collector of the two specimens (Ref. 1688).
More on author: Cuvier.

Environment: milieu / climate zone / depth range / distribution range বাস্তুসংস্থান

; স্বাদু পানি তলদেশ বিহারী ; pH range: 6.0 - 8.0; dH range: 5 - 19; পোটামোড্রোমাস (Ref. 51243). Tropical; 25°C - 28°C (Ref. 2060); 16°N - 2°S, 17°W - 37°E

বিতরণ দেশ সমূহ | এফ এ ও এলাকাসমূহ | বাস্তুতন্ত্র | দৃষ্টিগোচর | Point map | প্রচলন | Faunafri

Africa: subspecies Polypterus senegalus senegalus known from West Africa, in Senegal, Gambia, Niger, Volta and Chad basins (Ref. 2835, 3188, 81263), up to Nile River basin (Ref. 2835, 3188) and lakes Turkana (Ref. 3188) and Albert (Ref. 41590, 48922, 48960). Subspecies Polypterus senegalus meridionalis known from middle and upper Congo River basin (Ref. 2835, 3188, 4910, 45434).

Length at first maturity / আকৃতি / ওজন / Age

Maturity: L_m 19.0, range 15 - 23 cm
Max length : 70.0 cm SL পুরুষ/ লিঙ্গ অনিধর্ারিত ; (Ref. 3188); সবের্াচ্চ প্রকাশিত ওজন : 207.00 g (Ref. 3013)

Short description সনাক্তকারী নির্দেশক | বহিঃ অঙ্গ সংস্থান | মরফোমেট্রিক্স

পৃষ্ঠীয় কাঁটা (মোট ) : 8 - 11; পায়ূ কাঁটা : 14 - 17; কশেরুকা : 53 - 59. Diagnosis: Polypterus senegalus is characterized by jaws of equal length or an upper jaw slightly longer than lower jaw and a pectoral fin not reaching the first dorsal ray (Ref. 2756, 2835, 42908, 43035, 81263).

Facultative air-breathing (Ref. 126274); This species inhabits marginal swamps and freshwater lagoons (Ref. 3066) and it appears to favor sheltered inshore habitats (Ref. 3034); it inhabits the muddy regions at the sides of rivers and swampy waters, where it lies quiet or glides about with snake-like movements (Ref. 49805). During the hottest hours of the day, it comes to the surface just on the outer edge of the vegetation, and it goes back to the bottom when disturbed (Ref. 45962). It feeds on insects, crustaceans, mollusks, frogs and fishes (Ref. 4903, Ref. 28714). Polypterus senegalus senegalus is mainly insectivorous (Ref. 367). Longevity of Polypterus senegalus in captivity can be 34 years and more (Ref. 48954). Larval fish 1.1-3.8 cm SL were found in papyrus root mat and juveniles up to 10 cm SL retaining external gills were found in fringing water hyacinth. Feeds mainly on fishes (Ref. 9695), insects, crustaceans, mollusks, frogs as well as on plant fragments and seeds.

Life cycle and mating behavior Maturities | প্রজনন | Spawnings | Egg(s) | Fecundities | শুককীট

In Polypterus senegalus courtship starts with a series of leaps from the surface by usually only one of the pair at a time, followed by a slow descent through the water; after a while the male stays very close to the female and at times the female will remain motionless in the water and the male will come up to her from behind and nudge her with sidewise movements of his head; the enlarged and swollen anal fin of the male is folded in a cup-like fashion and is used to brush the female (Ref. 42791). No nest is constructed, but the eggs are laid a few at a time throughout the thick vegetation (Ref. 42791). The larvae, which move about with the male parent in a dense school, are provided with accessory gills and appear very salamander-like (Ref. 42791).

Main reference Upload your references | সূত্র সংখ্যা | সমম্বয়কারী | সহযোগী

Gosse, J.P. and J. Daget, 2003. Polypteridae. p. 101-112. In D. Paugy, C. Lévêque and G.G Teugels (eds.) The fresh and brackish water fishes of West Africa Volume 1. Coll. faune et flore tropicales 40. Institut de recherche de développement, Paris, France, Muséum national d'histoire naturelle, Paris, France and Musée royal de l'Afrique Central, Tervuren, Belgium, 457p. (Ref. 81263)

IUCN Red List Status (Ref. 130435)

Least Concern (LC) ; Date assessed: 07 June 2019

CITES (Ref. 128078)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

Harmless

Human uses

মৎস্য: বাণিজ্যিক

FAO(Publication : search) | FishSource |

আরো তথ্য

Trophic ecology
খাদ্যসামগ্রী
Diet compositions
Food consumptions
Food rations
শিকারী প্রাণী সমূহ

Ecology
বাস্তুসংস্থান
Home ranges

Population dynamics
Growths
Max. ages / sizes
Length-weight rel.
Length-length rel.
Length-frequencies
Mass conversions
Recruitments
Abundances

Life cycle
প্রজনন
Maturities
Fecundities
Spawnings
Spawning aggregations
Egg(s)
Egg developments
শুককীট
শুককীটের সত্রিুয়তা

Distribution
দেশ সমূহ
এফ এ ও এলাকাসমূহ
বাস্তুতন্ত্র
দৃষ্টিগোচর
প্রচলন
BRUVS - Videos

Anatomy
Gill areas
মস্তিস্ক সমূহ
Otoliths

Physiology
Body compositions
Nutrients
Oxygen consumptions
-এর সাতাঁরের ধরণ
Swimming speeds
Visual pigment(s)
মৎস্য শব্দ
Diseases / Parasites
Toxicities (LC50s)

Genetics
বংশানুগতিবিদ্যা
Electrophoreses
Heritabilities

Human related
Aquaculture systems
একুয়াকালচার নকশাসমূহ
বংশ
Ciguatera cases
Stamps, coins, misc.

Outreach
সহযোগী

Taxonomy
প্রচলিত নাম সমূহ
প্রতিনাম সমূহ
বহিঃ অঙ্গ সংস্থান
মরফোমেট্রিক্স
ছবি সমূহ

References
সূত্র সংখ্যা

হাতিয়ার

Special reports

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

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Summary page | তথ্য নির্দেশ করুন | প্রচলিত নাম সমূহ | Photos

ইন্টারনেট সুত্র

Estimates based on models

Phylogenetic diversity index (Ref. 82804): PD₅₀ = 0.5002 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.00457 (0.00321 - 0.00650), b=2.98 (2.88 - 3.08), in cm Total Length, based on LWR estimates for this species (Ref. 93245).

ট্রফিক পর্যায়ে (Ref. 69278): 3.5 ±0.2 se; based on diet studies.

স্থিতিস্থাপক (Ref. 120179): নিম্ন/ , সর্বনিম্ন প্রজন দ্বিগুনের সময় ৪.৪-১৪ বৎসর (tmax=34 in Aquarium; Fec < 1,000).

Fishing Vulnerability (Ref. 59153): Moderate to high vulnerability (54 of 100).

Price category (Ref. 80766): Unknown.

Polypterus senegalus Cuvier, 1829