Pollimyrus isidori (Valenciennes, 1847)
Elephant Fish
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Pollimyrus isidori
画像によって Hippocampus-Bildarchiv
画像 | 切手、コイン、その他 | グーグルの画像
画像によって Hippocampus-Bildarchiv
分類 / 名前 共通名の | 類義語 | Catalog of Fishes(部類, 種) | ITIS | CoL | WoRMS | Cloffa
> Osteoglossiformes (Bony tongues) > Mormyridae (Elephantfishes)
Etymology: Pollimyrus: Because of Dr. Max Poll, ichthyologist + Greek, myros, -ou = the male of the morey eel.
Eponymy: Dr Max Fernand Leon Poll (1908–1991) was a Belgian ichthyologist, and ‘connoisseur of the fish fauna’. [...] Isidore Geoffroy Saint-Hilaire (1805–1861) was a French zoologist. [...] (Ref. 128868), visit book page.
More on author: Valenciennes.
Etymology: Pollimyrus: Because of Dr. Max Poll, ichthyologist + Greek, myros, -ou = the male of the morey eel.
Eponymy: Dr Max Fernand Leon Poll (1908–1991) was a Belgian ichthyologist, and ‘connoisseur of the fish fauna’. [...] Isidore Geoffroy Saint-Hilaire (1805–1861) was a French zoologist. [...] (Ref. 128868), visit book page.
More on author: Valenciennes.
環境：環境 / 気候帯 / 深さの範囲 / 分布範囲 生態学
; 新鮮な水 底生の; pH range: 6.0 - 8.0; dH range: 5 - 19; potamodromous (Ref. 51243). Tropical; 22°C - 24°C (Ref. 12468)
分布 領土 | 国連食糧農業機関の区域 | エコシステム | 事件 | 目的のマップ | 導入 | Faunafri
Africa: Senegal (Ref. 2915), Gambia, middle Niger (Ref. 3203) including the Benue (Ref. 2915), Volta and Chad basins, coastal rivers of Côte d'Ivoire (Sassandra, Bandama, Mé) and the Nile (Ref. 3203). Subspecies Pollimyrus isidori fasciaticeps and Pollimyrus isidori osborni are restricted to the Congo river basin (Ref. 3203).
初回成熟時の長さ / サイズ / 重さ / 年齢
成熟: Lm 6.5 range ? - ? cm
Max length : 10.3 cm TL オス/雌雄の選別がない; (Ref. 57961); 最大公表体重: 7.00 g (Ref. 3799)
Max length : 10.3 cm TL オス/雌雄の選別がない; (Ref. 57961); 最大公表体重: 7.00 g (Ref. 3799)
簡単な記述 検索表 | 形態学 | 形態計測学
背面の脊椎 (合計) : 0; 背鰭 (合計) : 17 - 22; 肛門の骨: 0; 臀鰭: 21 - 27. Body depth 2.8-4.2 x SL. Sokomo and Comoe forms longer with SL/Depth ratio 3-4. Head 3.8-5.0 x SL. Eye diameter 3.3-6.4 x head length. Dorsal origin slightly behind anal fin origin. Pectorals slightly shorter or equal to head length, 2-3 x longer than pelvic fins, its posterior end reaching past origin of pelvic fins. Caudal peduncle height 2.3-3.9 x of its length, 12.3-20.6 x SL. Middle reaches fish silvery in color with lots of small spots on sides and head, higher reaches fish darker with darker and fewer spots.
Body shape (shape guide): fusiform / normal; Cross section: compressed.
Body shape (shape guide): fusiform / normal; Cross section: compressed.
Occupies floodplain pools in Sudd. Feeds on mud, vegetable debris and small invertebrates (Ref. 28714). Affinities: only to P. adspersus, morphologically similar; distinguished through scales on caudal peduncle, dorsal and anal fin rays and body coloration. Generates electric organ discharge (EOD) of short duration (0.08 ms) that seems to correlate with aggregative behavior of the species (Ref. 10460; 10601). During the breeding season, males build nests and while patrolling their territory sporadically emit EODs at a mean rate of 18 Hz. Participating females, on the other hand, discharge at a fairly regular rate (8-11 Hz) and this has been shown to play a role in sex recognition during courtship and spawning. Male and female EOD waveforms also differ in the amplitude ratio of the first and third phase (Ref. 10764). Also produce natural sounds ('grunts', 'moans', 'growl', etc.) at different phases of courtship, nesting and territorial defense (Ref. 10832). A fractional spawner; females able to spawn up to 26 times in the course of one reproductive cycle, laying about 125 eggs per spawning episode. Larval electric organ situated in the deep lateral musculature; that of adults in the caudal peduncle (Ref. 10605).
ライフサイクルと交尾行動 成熟 | 繁殖 | 放精 | 卵 | 生産力 | 幼生
30-200 eggs are spawned evey 5-8 days. Male builds nest and tends eggs and larvae. Eggs hatch after 4 days and feed after 12 days.
主な参考文献
参考文献のアップロード | 参考文献 | コーディネーター | 協力者
Bigorne, R., 1990. Mormyridae. p. 122-184. In C. Lévêque, D. Paugy and G.G. Teugels (eds.) Faune des poissons d'eaux saumâtres d'Afrique de l'Ouest. tome 1. Faune Trop. 28. Musée Royal de l'Afrique Centrale, Tervuren, and ORSTOM, Paris. (Ref. 2915)
CITES
Not Evaluated
人間に対する脅威
Harmless
人間の用途
水産業: 興味がない; 水族館・水槽: 商業
FAO - Publication: search | FishSource |
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遺伝子の
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遺伝子の
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遺伝
遺伝的多様性
ゲノム
遺伝子の
ヘテロ接合性
遺伝
遺伝的多様性
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インターネットの情報源
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モデルに基づく推定値
系統多様性指数 (参照 82804): PD50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01175 (0.00648 - 0.02132), b=2.82 (2.66 - 2.98), in cm total length, based on LWR estimates for this species & (Sub)family-body (Ref. 93245).
栄養段階 (参照 69278): 2.6 ±0.22 se; based on food items.
回復力 (参照 120179): 高い, １５か月以下の倍増期間の最小個体群 (tm=0.5).
栄養素 (Ref. 124155): Calcium = 492 [244, 1,584] mg/100g; Iron = 3.22 [1.38, 7.00] mg/100g; Protein = 17.3 [14.8, 19.8] %; Omega3 = 0.606 [0.206, 1.757] g/100g; Selenium = 91.2 [29.7, 293.3] μg/100g; VitaminA = 26.9 [8.8, 87.6] μg/100g; Zinc = 3.37 [1.98, 7.02] mg/100g (wet weight);