ইলাসমোব্রাঙ্কি (হাঙ্গর এবং রে) (sharks and rays) >
Carcharhiniformes (Ground sharks) >
Triakidae (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
বাস্তুসংস্থান
সামুদ্রিক; ঈষৎ লোনা তলদেশ বিহারী; গভীরতার পরিসীমা 0 - 156 m (Ref. 96339), usually ? - 6 m (Ref. 55312). Subtropical; 45°N - 19°N, 126°W - 105°W (Ref. 55312)
Eastern Pacific: Oregon, USA to the Gulf of California.
Length at first maturity / আকৃতি / ওজন / Age
Maturity: Lm 109.8, range 100 - 129 cm
Max length : 198 cm TL পুরুষ/ লিঙ্গ অনিধর্ারিত ; (Ref. 244); 180.0 cm TL (female); common length : 160 cm TL পুরুষ/ লিঙ্গ অনিধর্ারিত ; (Ref. ); সবের্াচ্চ প্রকাশিত ওজন : 18.4 kg (Ref. 40637); সর্বোচ্চ উলি্ল্লখিত বয়স : 30 বৎসর (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.
Females produce 6-24 young, which are 20-23 cm long at birth (Ref. 43439). Ovoviviparous, embryos feed solely on yolk (Ref. 50449).
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)
IUCN Red List Status (Ref. 130435)
Threat to humans
Harmless
Human uses
মৎস্য: বাণিজ্যিক; শিকারযোগ্য মাছ: হঁ্যা ; মৎস্যাধার / এ্যাকুয়ারিয়াম : বাণিজ্যিক
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ইন্টারনেট সুত্র
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).
ট্রফিক পর্যায়ে (Ref.
69278): 3.7 ±0.2 se; based on diet studies.
স্থিতিস্থাপক (Ref.
120179): অত্যন্ত কম , সর্বনিম্ন প্রজন দ্বিগুনের সময় ১৪ বৎসর (K=0.07-0.09; tm=11-21; tmax=30; Fec=4-12).
Fishing Vulnerability (Ref.
59153): Very high vulnerability (80 of 100).
