分類 / Names
共通名の | 類義語 | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa
(Rivulines, killifishes and live bearers) > Poeciliidae
(Poeciliids) > Poeciliinae
Etymology: Gambusia: Gambusia: From the Cuban term, Gambusino, which means "nothing", usually in the context of a joke or a farce. Fishing for gambusinos = when one catches nothing (Ref. 45335); affinis: From the Latin word affinusmeaning related (Ref. 79012). More on authors: Baird & Girard.
Environment: milieu / climate zone / depth range / distribution range
; 新鮮な水; 汽水性の 底生の漂泳性; pH range: 6.0 - 8.0; dH range: 5 - 19; potamodromous. Subtropical; 12°C - 29°C (Ref. 52055); 42°N - 26°N
North and Central America: Mississippi River basin from central Indiana and Illinois in USA south to Gulf of Mexico and Gulf Slope drainages west to Mexico. One of the species with the widest range of introductions which acquired for itself a near pan-global distribution (Ref. 1739). Several countries report adverse ecological impact after introduction.
サイズ / 重さ / 年齢
Maturity: Lm ?  range ? - ? cm
Max length : 5.1 cm TL オス/雌雄の選別がない; (Ref. 50932); 7.0 cm TL (female); common length : 3.9 cm TL オス/雌雄の選別がない; (Ref. 12193); 最大記録サイズ: 3 年 (Ref. 796)
背面の脊椎 (合計): 0; 背鰭 (合計): 7-9; 肛門の骨 0; 臀鰭: 9 - 10. Origin of dorsal fin opposite 7th anal ray. Length of anal base much less than half distance from caudal. 8 horizontal scale rows between back and abdomen. Ventrals terminate immediately before anal fin. Pelvic fins reach ventrals.
Most abundant in lower reaches of streams (Ref. 44091). Adults inhabit standing to slow-flowing water; most common in vegetated ponds and lakes, backwaters and quiet pools of streams. Found frequently in brackish water (Ref. 5258). Pelagic and surface predatory fish (Ref. 94816). Feed on zooplankton, small insects and detritus (Ref. 5258, 10294). Used as live food for carnivorous aquarium fishes. Viviparous (Ref. 5258, 30578). Effective in mosquito control and widely introduced, but found to compete with indigenous fish and to upset the ecological balance (Ref. 6351).
Life cycle and mating behavior
成熟 | 繁殖 | 放精 | 卵 | 生産力 | 幼生
The species is viviparous (Ref. 5258). Internal fertilization is possible because the anal fin of the male is modified into a copulatory organ. The females carries about 30 alevins and gestation lasts for a period of 24 days (Ref. 6348) to a month (Ref. 30578).
Page, L.M. and B.M. Burr, 1991. A field guide to freshwater fishes of North America north of Mexico. Houghton Mifflin Company, Boston. 432 p. (Ref. 5723)
CITES (Ref. 118484)
水産業: 少数商業の; 水族館・水槽: 商業
協力者画像Stamps, Coins Misc.音シガテラ（食中毒の名前）速度泳ぐ 型式カマOtoliths脳視覚
Estimates based on models
Phylogenetic diversity index (Ref. 82805
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00794 (0.00636 - 0.00991), b=3.11 (3.05 - 3.17), in cm Total Length, based on LWR estimates for this species (Ref. 93245
栄養段階 (Ref. 69278
): 3.1 ±0.2 se; Based on diet studies.
Generation time: 1.4 ( na - na) years. Estimated as median LN(3)/K based on 2 growth studies.
回復力 (Ref. 120179
): 手段, １．４年～４．４年の倍増期間の最小個体群 (K=1.20; tmax=3; Fec=10-60).
弱み (Ref. 59153
): Moderate vulnerability (38 of 100) .