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Index Category
Num Date Index Chg. Chg. %
1 2015-03-22 97.14 -1.32 -1.36%
2 2015-03-15 98.46 0.00 0.00%
3 2015-03-08 98.46 0.00 0.00%
4 2015-03-01 98.46 2.42 2.46%
5 2015-02-22 96.04 5.27 5.49%
6 2015-02-15 90.77 1.32 1.45%
7 2015-02-08 89.45 -1.10 -1.23%
8 2015-02-01 90.55 -0.88 -0.97%
9 2015-01-25 91.43 -1.98 -2.16%
10 2015-01-18 93.41 -2.86 -3.06%

特徴

産地:It lives in circumtropical and temperate waters of the world. Trichiurus japonicus which was originally described from Japan as Trichiurus lepturus japonicus was synonymized with Trichiurus lepturus. Another nominal species synonymized with Trichiurus lepturus is Trichiurus nitens from the eastern Pacific Ocean (California to Peru).
特徴:Dorsal spines (total): 3; Dorsal soft rays (total): 130-135; Anal soft rays: 100 - 105. Body extremely elongate, compressed and tapering to a point. Mouth large with a dermal process at the tip of each jaw. Dorsal fin relatively high; anal fin reduced to minute spinules usually embedded in the skin or slightly breaking through; anterior margin of pectoral fin spine not serrated. Pelvic and caudal fins absent. Lateral line beginning at the upper margin of the gill cover, running oblique to behind the tip of the pectoral fins, then straight close to the ventral contour. Fresh specimens steely blue with silvery reflections, becoming uniformly silvery gray sometime after death (Ref. 6181).
Maturity: Lm 46.3, range 30 - 99 cm
Max length : 234 cm TL male/unsexed; (Ref. 26340); common length : 100.0 cm TL male/unsexed; (Ref. 26999); max. published weight: 5.0 kg (Ref. ); max. reported age: 15 years (Ref. 7142)
Biology:
Generally over muddy bottoms of shallow coastal waters (Ref. 9351). Often enter estuaries (Ref. 9351). Juveniles feed mostly on euphausiids, small pelagic planktonic crustaceans and small fishes; adults feed mainly on fishes and occasionally on squids and crustaceans (Ref. 6181). Adults and juveniles have opposing complementary vertical diurnal feeding migration. Large adults usually feed near the surface during the daytime and migrate to the bottom at night. Juveniles and small adults form schools 100 m above the bottom during the daytime and form loose feeding aggregations at night near the surface. Pelagic eggs (Ref. 35388) and larvae (Ref. 6768). Max weight of 1.5 kg given in Ref. 28023 seems too low.
Processing
Procedures: raw fish picking → cleaning → weighing and panning → cooling → pan shedding → Refrigerating
Operation Notes:
1.Requirements for raw squid are: body has no damage but surface gloss. Eyes full with transparent cornea, muscles with elasticity.
2.Raw fish Picking: Remove trash fish and other debris according to the strict quality requirements on raw material selection.
3.Cleaning: because the raw fish itself is clean so what we need to do is simply to spray
Weighing and panning: 15-20 kg per pan, with 0.3-0.5 kg of water to compensate for the freezing process in the fish body weight reductions caused by moisture evaporation. Then pan the fishes according to fish size respectively. During the process of panning, in order to ensure the fish quality, substandard fish must be removed, and pan the fresh fish to make up. Beltfish must be placed closely straight when panned with head toward the pan at each end. When circled in the pan, the belly of beltfish must be towards the bottom of the pan with back toward outwards. As for smaller fish, just place them into the pan tidily and tail and head of the fish are not allowed beyond the pan.
5.Refrigerating: panned fish should be promptly refrigerated. In less than 14 hours to make the temperature of core part of the fish down to -15 Celsius degree.
6.Pan shedding: immerse the fish pan into clean water with temperature of 10-20 Celsius degrees for several seconds, then remove the fish from the pan.