Nobashi Ebi (Stretched / Elongated Shrimp): A traditional Japanese-style value-added frozen shrimp product prepared from peeled, tail-on (PTO) marine or vannamei shrimp.
Small diagonal incisions (typically 4–5 cuts) are made along the ventral muscle grooves, and the shrimp is gently pressed and stretched straight manually.
This prevents muscle contraction and curling during cooking, making it ideal for breaded/battered shrimp and Tempura preparation.
Correct Option: Option 1 (Nobashi).
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Japanese Surimi-Based Paste Products (Kamaboko Varieties):
Satsuma-age (Age-kamaboko): A deep-fried surimi-based fish cake product popular in Kagoshima (Satsuma province), Japan, characterized by a golden-brown fried crust and elastic interior.
Chikuwa: Bamboo-shaped surimi product grilled / broiled on rotating metal or bamboo skewers.
Hampen: Fluffy, marshmallow-like boiled fish cake prepared by whipping surimi with grated yam and egg white.
Tempura: Lightly battered, deep-fried seafood and vegetables.
Correct Option: Option 4 (Satsumaage).
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Q.43
Fisheries Resource Management- ICAR JRF/SRF 2024
MCQ (Single Correct)+4−1
Black discoloration of shrimps is prevented by dipping in a solution containing
Melanosis: Post-harvest enzymatic darkening and black discolouration occurring on the carapace, head, and pleopods of prawns, shrimps, and lobsters during iced storage.
Mechanism: Polyphenol oxidase (PPO / Tyrosinase) catalyzes the oxidation of tyrosine and other monophenols into dopaquinone, which polymerizes into dark, insoluble melanin pigments.
Chemical Control: Dipping freshly harvested prawns in $1.25\% - 1.5\%$ Sodium Metabisulphite ($Na_2S_2O_5$) solution for 1 minute competitively inhibits polyphenol oxidase and reduces intermediate quinones back to diphenols, preventing blackening.
Correct Option: Option 2 (Sodium metabisulphite).
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Q.44
Fisheries Resource Management- ICAR JRF/SRF 2024
MCQ (Single Correct)+4−1
Histamine intoxication results from the consumption of spoiled fish belonging to the group of
Scombroid Fishes: Scombroid fish species (family Scombridae), including tuna (Thunnus spp.), mackerel (Scomberomorus spp., Rastrelliger spp.), skipjack, and bonito, contain exceptionally high levels of free L-histidine in their dark muscle.
Histamine Formation: Inadequate post-harvest temperature control permits proliferation of bacterial contaminants possessing the enzyme L-histidine decarboxylase (e.g., Morganella morganii, Klebsiella pneumoniae, Enterobacter aerogenes), which decarboxylates histidine to toxic histamine:
Squalene ($C_{30}H_{50}$) is a natural acyclic triterpene unsaturated hydrocarbon.
It is present in extraordinary concentrations (up to $60-80\%$ of liver oil) in the enlarged, lipid-rich livers of deep-sea sharks (family Squalidae and Centrophoridae, e.g., Centrophorus squamosus, Squalus acanthias).
In deep-sea sharks, the low-density squalene provides static hydrodynamic buoyancy in lieu of a swim bladder. Squalene is industrially harvested for cosmetics, skin therapeutics, and pharmaceutical adjuvant formulations.
Correct Option: Option 1 (Liver of sharks).
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