分類 / Names
共通名の | 類義語 | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa
(Catfish) > Ictaluridae
(North American freshwater catfishes)
Etymology: Ameiurus: Greek, a = without + Greek, meiouros, -os, -on = without tail (Ref. 45335); nebulosus: nebulosus meaning clouded, in relation to mottled and grey coloring (Ref. 1998). More on author: Lesueur.
Environment: milieu / climate zone / depth range / distribution range
; 新鮮な水 底生の; 深さの範囲 0 - 12 m (Ref. 1998). Subtropical; 0°C - 37°C (Ref. 35682); 54°N - 25°N, 104°W - 61°W (Ref. 86798)
North America: Atlantic and Gulf Slope drainages from Nova Scotia and New Brunswick in Canada to Mobile Bay in Alabama in USA; St. Lawrence-Great Lakes, Hudson Bay, and Mississippi River basins from Quebec west to southeastern Saskatchewan in Canada, and south to Louisiana, USA. Introduced into several countries. Several countries report adverse ecological impact after introduction.
Length at first maturity / サイズ / 重さ / 年齢
Maturity: Lm ?, range 20 - 33 cm
Max length : 55.0 cm TL オス/雌雄の選別がない; (Ref. 40637); common length : 25.0 cm TL オス/雌雄の選別がない; (Ref. 556); 最大公表体重: 2.7 kg (Ref. 40637); 最大記録サイズ: 9 年 (Ref. 59043)
背面の脊椎 (合計): 1; 背鰭 (合計): 6-7; 肛門の骨 1. Caudal fin with 18-19 rays.
Occurs in pools and sluggish runs over soft substrates in creeks and small to large rivers. Also found in impoundments, lakes, and ponds (Ref. 86798). Rarely enters brackish waters (Ref. 1998). A nocturnal feeder that feeds mollusks, insects, leeches, crayfish and plankton, worms, algae, plant material, fishes and has been reported to feed on eggs of least cisco, herring and lake trout (Ref. 1998). Juveniles (3-6 cm) feed mostly on chironomid larvae, cladocerans, ostracods, amphipods, bugs and mayflies (Ref. 1998). Can tolerate high carbon dioxide and low oxygen concentrations and temperatures up to 31.6 °C although experiments show upper lethal temp. to be 37.5 °C; resistant to domestic and industrial pollution (Ref. 1998). Has been observed to bury itself in mud to escape adverse environmental conditions (Ref. 1998). Prepared hot-smoked and also cooked in various ways (Ref. 1998).
Life cycle and mating behavior
成熟 | 繁殖 | 放精 | 卵 | 生産力 | 幼生
Nests are built by one or both sexes. After a period of caressing each other with their barbels, male and female settle over the nest, face opposite directions (while maintaining body contact) and spawn. Although eggs are cared for by one or both parents, there have been reports of parents eating their own eggs. Caring entails fanning by the paired fins, moving and stirring by the barbels, and may be picked up and ejected from the mouth; this ensures hatching.
Page, L.M. and B.M. Burr, 2011. A field guide to freshwater fishes of North America north of Mexico. Boston : Houghton Mifflin Harcourt, 663p. (Ref. 86798)
CITES (Ref. 118484)
水産業: 少数商業の; 水産養殖: 商業; ゲームフィッシュ: はい
Estimates based on models
Phylogenetic diversity index (Ref. 82805
= 0.5078 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00871 (0.00540 - 0.01405), b=3.08 (2.94 - 3.22), in cm Total Length, based on LWR estimates for this species & (Sub)family-body (Ref. 93245
栄養段階 (Ref. 69278
): 3.7 ±0.1 se; Based on diet studies.
Generation time: 2.3 ( na - na) years. Estimated as median LN(3)/K based on 1 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=0.47; tm=3; tmax=8).
弱み (Ref. 59153
): Low to moderate vulnerability (30 of 100) .