分类 / Names
俗名 | 同种异名 | Catalog of Fishes(属, 种) | ITIS | CoL | WoRMS | Cloffa
Elasmobranchii
板鳃亚纲 (鲨鱼与 鱼) (sharks and rays) >
Carcharhiniformes (Ground sharks)
白眼鮫目 (Ground sharks) >
Triakidae (Houndsharks)
平滑鮫科 (Houndsharks) > Triakinae
Etymology: Triakis: tri-, from tres (L.), three; akis (Gr.), point, referring to each tooth consisting of one large central cusp flanked on by both sides by a small cusplet. (See ETYFish); semifasciata: semi-, from semis (L.), half; fasciatus (L.), banded, referring to striking black saddle marks that cover only dorsal half of body. (See ETYFish).
More on author: Girard.
Environment: milieu / climate zone / depth range / distribution range
生态学
海洋; 半咸淡水 居于水底的; 深度上下限 0 - 156 m (Ref. 96339), usually ? - 6 m (Ref. 55312). 亞熱帶的; 45°N - 19°N, 126°W - 105°W (Ref. 55312)
Eastern Pacific: Oregon, USA to the Gulf of California.
東太平洋: 美國的奧勒岡州到加州灣。
Length at first maturity / 大小 / 重量 / 年龄
Maturity: Lm 109.8, range 100 - 129 cm
Max length : 198 cm TL 雄鱼/尚未辨别雌雄; (Ref. 244); 180.0 cm TL (female); common length : 160 cm TL 雄鱼/尚未辨别雌雄; (Ref. ); 最大体重: 18.4 kg (Ref. 40637); 最大年龄: 30 年 (Ref. 6145)
Found in shallow water from the intertidal to deeper waters, most commonly in enclosed muddy bays; including estuaries and lagoons (S. Wilson, pers. comm.). Prefer sandy areas, mud flats, and bottoms strewn with rocks near rocky reefs and kelp beds. Feed mainly on crabs, shrimps, bony fish, fish eggs, clam necks and innkeeper worms among a large variety of food in its diet. Form mixed schools. Ovoviviparous (aplacental), with 4 to 29 young in a litter. Utilized fresh or frozen for human consumption.
发现于浅水区了从潮间带对较深的水域, 最通常在封闭的泥湾中; 包括河口与舄湖 (S. 威尔逊， pers. comm.)。 偏爱沙地，淤泥平台与布满岩石的底部邻近岩礁与海藻床。 在它的食性中存在一个食物的大变种主要捕食螃蟹，虾，硬骨鱼，鱼卵，蛤颈部与小旅馆主人蠕虫。 形式混合的鱼群。 卵胎生的 (无胎盘的), 3 到 29 幼鱼在一胎。 生鲜使用或冷冻供人类消费。
Life cycle and mating behavior
成熟度 | 繁殖 | 产卵场 | 卵 | 孕卵数 | 仔鱼
Females produce 6-24 young, which are 20-23 cm long at birth (Ref. 43439). Ovoviviparous, embryos feed solely on yolk (Ref. 50449).東太平洋: 美國的奧勒岡州到加州灣。
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 2 - Carcharhiniformes. FAO Fish. Synop. 125(4/2):251-655. Rome: FAO. (Ref. 244)
人类利用
渔业: 商业性; 游钓鱼种: 是的; 水族馆: 商业性
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Estimates based on models
Preferred temperature (Ref.
123201): 12.8 - 24, mean 20.4 °C (based on 131 cells).
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5312 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00229 (0.00119 - 0.00443), b=3.13 (2.97 - 3.29), in cm total length, based on LWR estimates for this species & (Sub)family-body (Ref.
93245).
营养阶层 (Ref.
69278): 3.7 ±0.2 se; based on diet studies.
回复力 (Ref.
120179): 非常低的, 最小族群倍增时间超过14 年 (K=0.07-0.09; tm=11-21; tmax=30; Fec=4-12).
Fishing Vulnerability (Ref.
59153): Very high vulnerability (80 of 100).
