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Dalatiidae (Sleeper sharks)
Etymology: Heteroscymnoides: -oides, Greek suffix meaning like, resembling, or having the form of: similar to Heteroscymnus (=Somniosus, now in Somniosidae) (See ETYFish); marleyi: In honor of Natal fisheries officer Harold Walter Bell-Marley (1872-1945), to whom Fowler was “indebted” for many “interesting” South African fishes,” this shark being “another of his numerous discoveries” (See ETYFish).
Eponymy: Harold Walter Bell Marley (1872–1945) was Principal Fisheries Officer (1918–1937) at Durban, South Africa, and a naturalist with a particular interest in entomology. [...] (Ref. 128868), visit book page.
More on author: Fowler.
Environment: milieu / climate zone / depth range / distribution range
Ekologi
laut bentopelagis; kisaran kedalaman 0 - 502 m (Ref. 247). Tropical; 14°S - 30°S
Southeast Atlantic: near Ascension Island. Western Indian Ocean: Durban, Natal, South Africa.
Size / Weight / umur
Maturity: Lm ? range ? - ? cm
Max length : 29.0 cm TL jantan/; (Ref. 5578)
deskripsi pendek
Kunci identifiaksi (pengenalan) | Morfologi | Morfometrik
Duri punggung (Keseluruhan (total)) : 0; Duri dubur: 0. A cylindrical, dwarf dogfish shark with a long bulbous snout, small round eyes, and small gill slits; caudal fin paddle-shaped (Ref. 5578). Dark brown with conspicuous light-edged fins (Ref. 5578). Ventral surface covered with minute photophores (Ref. 6577).
Probably oceanic (Ref. 5578). The holotype was caught off a beach, but a second specimen was taken in the Atlantic at night between the surface and 502 m (Ref. 247). Food unknown but may subsist on pelagic fish and invertebrates (Ref. 247). Probably ovoviviparous with very few young (Ref. 247).
Life cycle and mating behavior
Kematangan | Reproduksi, perkembang biakan | Pemijahan | telur-telur | Fecundity | Larva
Distinct pairing with embrace (Ref. 205).
Compagno, L.J.V., 1984. FAO Species Catalogue. Vol. 4. Sharks of the world. An annotated and illustrated catalogue of shark species known to date. Part 1 - Hexanchiformes to Lamniformes. FAO Fish. Synop. 125(4/1):1-249. Rome, FAO. (Ref. 247)
Status IUCN Red List (Ref. 130435: Version 2024-1)
ancaman kepada manusia
Harmless
penggunaan manusia
Perikanan: tidak ada kepentingan
Alat, peralatan
laporan khas
muat turun XML
Sumber internet
Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 1.0020 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00309 (0.00142 - 0.00675), b=3.14 (2.94 - 3.34), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Trophic level (Ref.
69278): 4.1 ±0.4 se; based on size and trophs of closest relatives
Daya lenting (Ref.
120179): Rendah, Waktu penggandaan populasi minimum 4.5 - 14 tahun (Fec assumed to be <100).
Fishing Vulnerability (Ref.
59153): Low vulnerability (19 of 100).
