Common names from other countries
分類 / Names
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Clupeiformes (Herrings) >
Alosidae (Shads and Sardines)
Etymology: Alosa: Latin, alausa = a fish cited by Ausonius and Latin, halec = pickle, dealing with the Greek word hals = salt; it is also the old Saxon name for shad = "alli" ; 1591 (Ref. 45335).
Environment: milieu / climate zone / depth range / distribution range
生態学
海; 新鮮な水; 汽水性の; 昇流魚 (Ref. 51243). Temperate; 48°N - 37°N, 27°E - 54°E
Eurasia: Black Sea, Sea of Azov and Caspian Sea.
サイズ / 重さ / 年齢
Maturity: Lm ? range ? - ? cm
Max length : 32.0 cm TL オス/雌雄の選別がない; (Ref. 593); common length : 20.0 cm SL オス/雌雄の選別がない; (Ref. 188); 最大公表体重: 250.00 g (Ref. 593); 最大記録サイズ: 7 年 (Ref. 10549)
背面の脊椎 (合計) : 0; 肛門の骨: 0. Body `shad-like', usually rather deep and compressed. Total gill rakers 50 to 180, long and thin, distinctly longer than filaments. Teeth poorly developed in jaws, sometimes barely detectable. A black spot posterior to gill opening and occasionally further black spots on flank in some cases.
Schooling and migratory (Ref. 188); at sea, pelagic in coastal waters with steady current and avoids areas with stable salinity; migrates from sea to mouth of large rives and spawns in fresh- or slightly brackish-water at shallow sites washed by flow of large rivers. Males migrate upriver at 2-3 years, females at 4-5; many individuals reproduce 2-4 seasons. Two migration peaks, one in late April (mostly males), one in early May (mostly females), entering rivers when temperature rises above 10°C. Spawns when temperature is at least 15°C, in May to June. Spawning usually occurs in the upper 3 m. Eggs semi-pelagic and demersal. Spent fish migrate back to the sea; juveniles migrate to sea during first summer, remaining there until they mature. Feeds mainly on zooplankton (copepods and mysids) when at sea (Ref. 59043). Depending on the subspecies (10 subspecies known), some are semi-anadromous and spawn in fresh or slightly saline waters, mainly in the lower reaches, whereas others are practically marine and spawn in brackish or even fully saline oceanic waters. One of the most warm-loving Alosa of the Caspian. Only A. a. caspia of the Caspian Sea is of commercial importance (Ref. 188).
Depending on the subspecies some are semi-anadromous and spawn in fresh or slightly saline waters, mainly in the lower reaches, whereas others are practically marine and spawn in brackish or even fully saline oceanic waters (Ref.188).There are two migration peaks, one in late April (mostly males) and one in early May (mostly females). Spent fish migrate back to sea. Juveniles migrate to sea during first summer, remaining at sea until they mature (Ref. 59043).
Whitehead, P.J.P., 1985. FAO Species Catalogue. Vol. 7. Clupeoid fishes of the world (suborder Clupeoidei). An annotated and illustrated catalogue of the herrings, sardines, pilchards, sprats, shads, anchovies and wolf-herrings. FAO Fish. Synop. 125(7/1):1-303. Rome: FAO. (Ref. 188)
CITES (Ref. 128078)
Not Evaluated
Human uses
水産業: 高い商業の
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
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00891 (0.00591 - 0.01344), b=2.97 (2.85 - 3.09), in cm Total Length, based on LWR estimates for this species & Genus-body shape (Ref.
93245).
栄養段階 (Ref.
69278): 3.5 ±0.46 se; based on food items.
回復力 (Ref.
120179): 手段, １．４年～４．４年の倍増期間の最小個体群 (tmax=7).
Fishing Vulnerability (Ref.
59153): Low to moderate vulnerability (34 of 100).
