Antarctic fishes: the chemical composition of muscle, liver and food of two notothenioids

• Autorzy: Kamler E
• Języki publikacji: EN

Abstrakty

EN

A combination of low fat (6.1 and 4.8% of dry matter), high protein (78.6 and 84.3% d.m.) and mineral content (6.3 and 6.2% d.m.), as well as high moisture (80.8 and 81.7% of fresh matter), which is typical of Antarctic benthic fish, was found in the muscle of Notothenia coriiceps and Lepidonotothen nudifrons, respectively. Fish food items (whole amphipods) were high in minerals (34.3% d.m.) and poor in protein (39.1% d.m.), while macroalgae presented an association of high moisture (89% of wet matter), high minerals (36.5% d.m.), low lipids (1.8% d.m.) and very low protein (17.5% d.m.). The poor nutritional value of these food items seems to be compensated for by high food intake. Sulfur levels in fish tissues were negatively related to fish size. Sulfur and nitrogen were inter-correlated strongly and positively, and most of the sulfate is probably derived in muscle and liver from sulfur-containing amino acids.

PL

Badano zawartość głównych pierwiastków (C, H, N i S) i głównych składników (uwodnienie, popiól, bialko i lipidy) w tkankach (mięśnie i wątroba) i pokarmie (całe Amphipoda i makroglony) dwóch bentonicznych ryb antarktycznych: Notothenia coriiceps i Lepidonotothen nudifrons. W mięśniach stwierdzono kombinację wysokich zawartości wody (odpowiednio 80,8 i 81,7%), popiołu (6,3 i 6,2% suchej materii) i białek (78,6 i 84,3% s.m.) oraz niskiej zawartości tłuszczu (6,1 i 4,8% suchej materii) (tabela 3); taka kombinacja jest typowa dla antarktycznych ryb przydennych. Wśród skladników pokarmowych - Amphipoda obfitowały w składniki mineralne (34,3% s.m.) i były ubogie w białko (39,1% s.m.), zaś w makroglonach wysokiemu uwodnieniu mokrej materii (89,0%) towarzyszyły wysoka zawartość popiołu (36,5% s.m.), bardzo niska zawartość białka (17,5% s.m.) i niska zawartość lipidów (1,8% s.m.) (tabela 3). Wydaje się, że niska wartość odżywcza pokarmu jest rekompensowana przez jego wysokie spożycie. Poziom siarki w tkankach był ujemnie skorelowany z wielkością ryb (rys. 1). Pozytywne, silne wzajemne korelacje siarki i azotu stwierdzone w tkankach można objaśnić tym, że w mięśniach i wątrobie większość siarki występuje w aminokwasach.

Słowa kluczowe

EN

fish; food chain; mineral content; food; notothenioid; chemical composition; Notothenia coriiceps; Notothenia rossii; fat; muscle; Antarctic fish; Lepidonotothen nudifrons; protein; liver; tissue; sulphur level

• Wydawca: -
• Czasopismo: Archives of Polish Fisheries
• Rocznik: 2003
• Tom: 11
• Numer: 2
• Opis fizyczny: p.197-206,fig.,ref.

Twórcy

autor

Kamler E

• The Stanislaw Sakowicz Inland Fisheries Institute in Olsztyn, Zabieniec, 05-500 Piaseczno, Poland

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