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Rastrineobola argentea (Pellegrin, 1904)
Silver cyprinid
ارفع صور و مقاطع فيديو
Pictures | صور قوقل
Rastrineobola argentea
Picture by KMFRI
Pictures | صور قوقل
Picture by KMFRI
Tanzania country information
Common names:
Dagaa
Occurrence: native
Salinity: freshwater
Abundance: | Ref:
Importance: highly commercial | Ref: Eccles, D.H., 1992
Aquaculture: | Ref:
Regulations: | Ref:
Uses: no uses
Comments: Known from Lake Victoria (Ref. 4967, 41271). Pelagic.This species has recently become very important as the basis of a large commercial fishery and is now the second most important species in Lake Victoria (Ref. 4967, 33811). Also Ref. 13624.
National Checklist:
Country Information: https://www.cia.gov/library/publications/resources/the-world-factbook/geos/tz.html
National Fisheries Authority: http://www.isp.msu.edu/AFRICANSTUDIES/PLEA/TAFIRI.HTM
Occurrences: Occurrences Point map
Main Ref: Eccles, D.H., 1992
National Database:
Occurrence: native
Salinity: freshwater
Abundance: | Ref:
Importance: highly commercial | Ref: Eccles, D.H., 1992
Aquaculture: | Ref:
Regulations: | Ref:
Uses: no uses
Comments: Known from Lake Victoria (Ref. 4967, 41271). Pelagic.This species has recently become very important as the basis of a large commercial fishery and is now the second most important species in Lake Victoria (Ref. 4967, 33811). Also Ref. 13624.
National Checklist:
Country Information: https://www.cia.gov/library/publications/resources/the-world-factbook/geos/tz.html
National Fisheries Authority: http://www.isp.msu.edu/AFRICANSTUDIES/PLEA/TAFIRI.HTM
Occurrences: Occurrences Point map
Main Ref: Eccles, D.H., 1992
National Database:
Common names from other countries
التصنيف / Names الأسماء الشائعة | مرادفات | Catalog of Fishes(جنس, الانواع) | ITIS | CoL | WoRMS | Cloffa
Environment: milieu / climate zone / depth range / distribution range البيئة
; المياه العذبة محيطي; نطاق العمق 50 - ? m (Ref. 34290). Tropical; 22°C - 26°C (Ref. 13614); 2°N - 7°S
التوزيع دول | مناطق الفاو | النظام البيئي | الظهور | Point map | مقدمة | Faunafri
Africa: known from the Lake Victoria drainage, including Lake Kyoga, Lake Nabugabo and the Victoria Nile (Ref. 4903).
Length at first maturity / الحجم / وزن / العمر
Maturity: Lm 3.8, range 4 - 4.9 cm
Max length : 8.0 cm TL ذكر/ مختلط الجنس; (Ref. 52331); العمر: 3.00 سنين (Ref. 126001)
Max length : 8.0 cm TL ذكر/ مختلط الجنس; (Ref. 52331); العمر: 3.00 سنين (Ref. 126001)
وصف مختصر مفاتيح التعريف | الوصف الخارجي | قياسات المظهر الخارجي
الأشعة الظهرية الناعمة (المجموع) : 9 - 11; أشعه شرجية لينه: 16 - 19. Diagnosis: body strongly compressed (Ref. 34290), body height 4.25-4.75 times in body length, caudal peduncle twice as height as long (Ref. 42448). Lower jaw slightly prominent (Ref. 55057). Mouth large, terminal and rather oblique, without lips or circumoral barbels (Ref. 34290), extending to below anterior border of eye (Ref. 1872, 2988, 31439). Cheek largely covered by thin suborbital bones (Ref. 2988, 31439, 34290). Branchiospines rather short but not rudimentary; pharyngeal teeth conical (Ref. 55057). Gill rakers moderately long (Ref. 2988, 31439), 16 on (lower part of) first branchial arch (Ref. 2988, 4903, 31439). Scales moderately large, 42-56 on lateral line (Ref. 34290). Lateral line descending from about upper part of gill opening to just before ventral-fin origin (Ref. 42005, 55057), more or less following the ventral body profile from ventral fin to caudal peduncle (Ref. 34290, 55057). Dorsal fin situated almost entirely above anal fin (Ref. 34290). Anal-fin base about twice as long as dorsal-fin base (Ref. 4967). 12-17 branched anal-fin rays (Ref. 4903, 34290). Pectoral fin not reaching pelvic fin (Ref. 2988, 4967, 31439, 55057). Body silver with an overall nacreous sheen (Ref. 4903, 34290), yellowish brown above (Ref. 31439). Caudal fin yellow (Ref. 2988¸4903, 31439, 34290), other fins colourless (Ref. 4903, 34290), white or greyish (Ref. 2988, 31439). Dead specimens with a distinct mid-lateral stripe (Ref. 4903, 34290), stripe silver in life (Ref. 4967).
Highly adapted to pelagic life (Ref. 12526). Found inshore and offshore (Ref. 34290). Known from the surface of inshore and coastal waters; some records from surface waters over great depth (Ref. 4903, 34291). Adults stay near the bottom during the day and near the surface at night (Ref. 34291). Juvenile fish migrate away from the shore after spending their larval stage in shallow areas (Ref. 33811). In Lake Kyoga occurring in open water away from water-lily swamps; in Victoria Nile caught in turbulent regions (Ref. 4903). Feed on zooplankton and surface insects (Ref. 4903, 12526, 34291) and eaten by birds and various fish species, mainly siluroids including Schilbe mystus, Clarias gariepinus, Bagrus docmak (Ref. 12526, 52061) and Synodontis victoriae (Ref. 125996). Mature individuals spawn in the lake and produce floating eggs (Ref. 52061). Sensitive to low oxygen conditions (Ref. 125996).
Life cycle and mating behavior النضج | التكاثر | وضع البيض | بيض | الخصوبة | Larvae
المرجع الرئيسي
Upload your references | مراجع | المنظم | المتعاونين
Lévêque, C. and J. Daget, 1984. Cyprinidae. p. 217-342. In J. Daget, J.-P. Gosse and D.F.E. Thys van den Audenaerde (eds.) Check-list of the freshwater fishes of Africa (CLOFFA). ORSTOM, Paris and MRAC, Tervuren. Vol. 1. (Ref. 2801)
IUCN Red List Status (Ref. 130435: Version 2024-2)
Least Concern (LC) ; Date assessed: 07 March 2016
خطر للأنسان
Harmless
استخدامات بشرية
مصائد: ذو قيمة تاجرية عالية; طعم: usually
FAO(مصائد: الأنتاج; publication : search) | FishSource |
مزيد من المعلومات
Population dynamics
معاملات النمو
Max. ages / sizes
Length-weight rel.
Length-length rel.
الطول- الترددات
Mass conversion
توظيف
الوفرة
معاملات النمو
Max. ages / sizes
Length-weight rel.
Length-length rel.
الطول- الترددات
Mass conversion
توظيف
الوفرة
Anatomy
منطقة الخياشيم
Brain
Otolith
منطقة الخياشيم
Brain
Otolith
Physiology
Body composition
Nutrients
استهلاك الأوكسجين
نوع السباحة
سرعة السباحة
Visual pigments
Fish sound
Diseases & Parasites
Toxicity (LC50s)
Body composition
Nutrients
استهلاك الأوكسجين
نوع السباحة
سرعة السباحة
Visual pigments
Fish sound
Diseases & Parasites
Toxicity (LC50s)
Genetics
جيني
Heterozygosity
التوريث
جيني
Heterozygosity
التوريث
Human related
Aquaculture systems
ملامح تربية الأحياء المائية
سلالات
Ciguatera cases
Stamps, coins, misc.
Aquaculture systems
ملامح تربية الأحياء المائية
سلالات
Ciguatera cases
Stamps, coins, misc.
أدوات
E-book | دليل الميدان | Length-frequency wizard | أداة تاريخ الحياة | نقطة علي الخريطة | Classification Tree
| Catch-MSY |
تقارير خاصة
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Download XML
مصادر علي الأنترنت
Aquatic Commons | BHL | Cloffa | Websites from users | البحث في مراقبي الأسماك | CISTI | Catalog of Fishes(جنس, الانواع) | DiscoverLife | ECOTOX | Faunafri | Fishtrace | GenBank(الوراثة, نيوكلوتيدة) | GloBI | GOBASE | | Google Books | Google Scholar | Google | IGFA World Record | MitoFish | Otolith Atlas of Taiwan Fishes | PubMed | Reef Life Survey | Scirus | SeaLifeBase | شجرة الحياة | Wikipedia(ذهب, بحث) | World Records Freshwater Fishing | سجلات علم الحيوانات
Estimates based on models
Phylogenetic diversity index (Ref. 82804): PD50 = 1.0000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00617 (0.00486 - 0.00783), b=3.08 (3.01 - 3.15), in cm Total Length, based on LWR estimates for this species (Ref. 93245).
مستوى غذائي (Ref. 69278): 3.4 ±0.49 se; based on food items.
المرونه (Ref. 120179): عالي, الحد الزمني الأدني لتضاعف عدد أفراد المجتمع أقل من 15 شهر (K=0.9-1.0).
Fishing Vulnerability (Ref. 59153): Low vulnerability (14 of 100).