Potential contribution of fish feed and phytoplankton to the content of volatile terpenes in cultured Pangasius (Pangasianodon hypophthalmus) and Tilapia (Oreochromis niloticus)

TY - JOUR

T1 - Potential contribution of fish feed and phytoplankton to the content of volatile terpenes in cultured Pangasius (Pangasianodon hypophthalmus) and Tilapia (Oreochromis niloticus)

AU - Podduturi, Raju

AU - Petersen, Mikael Agerlin

AU - Mahmud, Sultan

AU - Rahman, Md. Mizanur

AU - Jørgensen, Niels O. G.

PY - 2017/5/10

Y1 - 2017/5/10

N2 - Geosmin and 2-methylisoborneol are the most recognized off-flavors in freshwater fish, but terpenes may also contribute off-flavor in fish. We identified six monoterpenes, 11 sesquiterpenes, and three terpene-related compounds in pangasius and tilapia from aquaculture farms in Bangladesh. The concentrations of most of the volatiles were below published odor thresholds, except for α-pinene, limonene, β-caryophyllene, α-humulene, and β-ionone in tilapia, and limonene and β-ionone in pangasius. To identify sources of the terpenes, terpene profiles of fish feed and phytoplankton in the ponds were analyzed. In feed and mustard cake (feed ingredient), five monoterpenes and two sesquiterpenes were identified, and five of these compounds were also detected in the fish. In phytoplankton, 11 monoterpenes were found and three also occurred in the fish. The higher number of terpenes common to both fish and feed, than to fish and phytoplankton, suggests that feed was a more abundant source of odor-active terpenes in the fish than phytoplankton.

AB - Geosmin and 2-methylisoborneol are the most recognized off-flavors in freshwater fish, but terpenes may also contribute off-flavor in fish. We identified six monoterpenes, 11 sesquiterpenes, and three terpene-related compounds in pangasius and tilapia from aquaculture farms in Bangladesh. The concentrations of most of the volatiles were below published odor thresholds, except for α-pinene, limonene, β-caryophyllene, α-humulene, and β-ionone in tilapia, and limonene and β-ionone in pangasius. To identify sources of the terpenes, terpene profiles of fish feed and phytoplankton in the ponds were analyzed. In feed and mustard cake (feed ingredient), five monoterpenes and two sesquiterpenes were identified, and five of these compounds were also detected in the fish. In phytoplankton, 11 monoterpenes were found and three also occurred in the fish. The higher number of terpenes common to both fish and feed, than to fish and phytoplankton, suggests that feed was a more abundant source of odor-active terpenes in the fish than phytoplankton.

KW - Animal Feed

KW - Animals

KW - Aquaculture

KW - Bangladesh

KW - Catfishes

KW - Cichlids

KW - Meat

KW - Phytoplankton

KW - Seafood

KW - Terpenes

KW - Volatilization

KW - Journal Article

U2 - 10.1021/acs.jafc.7b00497

DO - 10.1021/acs.jafc.7b00497

M3 - Journal article

C2 - 28421748

SN - 0021-8561

VL - 65

SP - 3730

EP - 3736

JO - Journal of Agricultural and Food Chemistry

JF - Journal of Agricultural and Food Chemistry

IS - 18

ER -