分類 / Names
共通名の | 類義語 | Catalog of Fishes(部類, 種) | ITIS | CoL | WoRMS | Cloffa
板鰓亜鋼(サメとエイ類) (sharks and rays) >
Torpediniformes (Electric rays) >
Narcinidae (Numbfishes)
Etymology: Benthobatis: Greek, benthos = depth of the sea + Greek, batis, -idos = a ray (Raja sp.) (Ref. 45335).
Eponymy: Dr Gerhard Krefft (1912–1993) was a German ichthyologist and herpetologist whose great uncle was Johann Ludwig Gerard Krefft (below). [...] (Ref. 128868), visit book page.
Environment: milieu / climate zone / depth range / distribution range
生態学
海 深海魚; 深さの範囲 420 - 527 m (Ref. 57911). Deep-water; 20°S - 45°S, 55°W - 40°W (Ref. 57911)
Southwest Atlantic: off southern Brazil.
サイズ / 重さ / 年齢
Maturity: Lm ? range ? - ? cm
Max length : 30.0 cm TL オス/雌雄の選別がない; (Ref. 57911)
Deep water species on the continental slope. Feeds on worms, isopods and amphipods. The late-term embryos seem to gestate in a combined uterine/cloacal chamber. Produces up to 2 pups during each pregnancy. Maturity size of males at ca. 15 cm TL, females at 20 cm TL; birth size at ca. 10 cm TL. It is reported to be locally abundant as many individuals have been collected together in a single trawl (Ref. 114953).
Life cycle and mating behavior
成熟 | 繁殖 | 放精 | 卵 | 生産力 | 幼生
There are indications that this species is ovovivipar (Ref. 57911).
Eschmeyer, W.N. (ed.), 2003. Catalog of fishes. Updated database version of March 2003. Catalog databases as made available to FishBase in March 2003. (Ref. 46206)
IUCNのレッドリストの状況は (Ref. 130435: Version 2024-2)
Human uses
水産業: 興味がない
用具
特記事項
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インターネットの情報源
Estimates based on models
Preferred temperature (Ref.
123201): 3.3 - 15.6, mean 6.9 °C (based on 37 cells).
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5625 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01175 (0.00470 - 0.02937), b=2.88 (2.66 - 3.10), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
栄養段階 (Ref.
69278): 3.2 ±0.46 se; based on food items.
回復力 (Ref.
120179): 非常に低い, １４年以上の倍増期間の最小個体群 (Fec=1-2).
Fishing Vulnerability (Ref.
59153): Low vulnerability (20 of 100).
