(كوسه ها و سپرماهيان) (sharks and rays) >
Squaliformes (Sleeper and dogfish sharks) >
Dalatiidae (Sleeper sharks)
Etymology: Squaliolus: Diminutive of squalus (L.), a sea-fish, usually applied to sharks, referring to small size of S. laticaudus (See ETYFish); aliae: In honor of the Teng’s wife Huang A-li, for her “cordial help and constant encouragement” [originally spelled alii; since name honors a woman, aliae reflects the correct gender] (See ETYFish).
Eponymy: Huang A-li is the name of Teng’s wife. He named the shark, which was first caught inTaiwanese waters, after her “…for her continuous encouragement and assistance over the past 20-some years”. (Ref. 128868), visit book page.
Environment: milieu / climate zone / depth range / distribution range
بوم شناسي
دريايي ناحیه ای از منطقه اقیانوسی با عمق بین 1000 تا 4000 متر. موجوداتی که در آبهای آزاد بین اعماق 1000 تا 4000 متر زندگی و تغذیه می کنند; تغييرات عمق 200 - 2000 m (Ref. 6871). Deep-water
Western Pacific: Japan to Australia (off northwestern Australia and New South Wales).
Length at first maturity / Size / Weight / سن
Maturity: Lm ?, range 15 - ? cm
Max length : 22.0 cm TL جنس نر / بدون خواص جنسي; (Ref. 6871)
خارهاي باله پشتي (کل) : 1; خارهاي باله مخرجي: 0. The smalleye pygmy shark, Squaliolus aliae, is a very small dogfish (about 22cm) characterized by its small eye, with diameter about 46-70% of interorbital width, and with upper margin angular and chevron-shaped; upper lip with a pair of prominent lateral papillae (rarely indistinct) (Ref. 31367, 6871).Colour: dark brown to black, fin margins pale (Ref. 6871). Squaliolus are the only sharks with a fin spine on its first dorsal fin (spine sometimes concealed by skin) but not on its second dorsal fin; second dorsal fin long-based and low, about twice the length of the first dorsal fin base; first dorsal-fin base closer to pectoral fins than to pelvic fins; and caudal fin nearly symmetrical, with subterminal notch present (Ref. 247, 6871).
Possibly the smallest living shark (Ref. 6871). Found near continental and island land masses (Ref. 31367). Feeds mainly on cephalopods and small midwater bony fishes (Ref. 6871). Probably makes diurnal vertical migrations from within 200 m of the surface at night down to about 2,000 m during the day (Ref. 6871). Ovoviviparous (Ref. 6871).
Life cycle and mating behavior
بلوغ | تولید مثل | تخم ریزی | تخم ها | Fecundity | توزاد ( لارو)
Distinct pairing with embrace (Ref. 205). Ovoviviparous but litter size unknown (Ref. 6871). Males mature at 15 cm (Ref. 31367).
Last, P.R. and J.D. Stevens, 1994. Sharks and rays of Australia. CSIRO, Australia. 513 p. (Ref. 6871)
وضعيت در فهرست قرمز IUCN (Ref. 130435: Version 2024-1)
خطر برای انسان ها
Harmless
استفاده انسانی
ماهي گيري – شيلات: از بی علاقه گی
ابزارها
گزارش های ويژه
بارگيری XML
منابع اينترنتي
Estimates based on models
Preferred temperature (Ref.
123201): 4.6 - 10.1, mean 6.5 °C (based on 559 cells).
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.7520 [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): 4.4 ±0.57 se; based on food items.
جهندگی (Ref.
120179): پايين ، كم, كمينه زمان لازم براي دو برابر شدن جمعيت 5/4 – 14 سال (Fec assumed to be <100).
Fishing Vulnerability (Ref.
59153): Low vulnerability (12 of 100).
