Proximate Composition and Heavy Metal Analysis of Three Aquatic Foods in Makoko River, Lagos, Nigeria

Abstract

ree aquatic products, tilapia sh, lobster and crab, were collected from the landing site of shermen in Makoko, a shing suburb in Lagos State, Nigeria. ey were analyzed for their proximate composition, and concentration of heavy metals (Cr, Cd, and Pb) was also measured in them. e nutrient values varied among the three organisms. e lobsters and crabs had higher protein values while tilapia was richer in lipid and moisture content. In most cases, these di erences were not signi cant. e concentration of heavy metals also di ered in the three organisms. All organisms had high concentrations of the three heavy metals analyzed. e heavy metal load as observed in this study is consistent with some previously reported values in literature. Plausible reasons for these di erences were discussed in light of size, trophic level, choice of food of the organisms, and anthropogenic activities. It may be advisable that heavy metal concentrations are regularly monitored in edible aquatic food products so that human health is not at risk.

Is the consumption of Tilapia zillii and Clarias gariepinus from Edku Lake — El Beheira Governorate —Egypt safe for humans: a physiological and biochemical study and determination of five trace elements

“…Abdel-Kader and Mourad (2020) showed that the water content in T. zillii 64± 1.9% and C. gariepinus 64 ± 2.1% from Burullus Lake, Egypt much lower than water content in our study. Ayanda et al (2018) recorded a signi cant rise in water content in tilapia from Nigeria at Makoko River may be rendering the sh sensitive to microbial spoilage, damage to fatty acids, and consequently decreasing sh quality thereby reducing its survival time (Omolara and Omotayo 2009) In our results, sh species showed an insigni cant decrease in the ash content. Maximum ash content was observed in the T. zillii (7.33±1.00%) while the minimum value (6.66±0.85 %) was recorded in the C. gariepinus.…”

“…Carbohydrate values in tilapia are insigni cant higher than crab values. In the lobster, carbohydrate is signi cantly lower than the other two species (Ayanda et al 2018).…”

“…Maximum ash content was observed in the T. zillii (7.33±1.00%) while the minimum value (6.66±0.85 %) was recorded in the C. gariepinus. In contrast, the ash content was signi cantly reduced in tilapia from Nigeria at Makoko River (Ayanda et al 2018).…”

“…The biochemical pro le in sh is a sensitive index of sh metabolism assessment under metallic stress. Several studies demonstrated that sh exposed to toxic elements such as Cd, Pb, Hg, As and Al recorded low levels of proteins and lipids (Sobha et al 2007;Selvam et al (2014); Ayanda et al 2018;Abdel-Kader and Mourad 2019b;Abdel-Kader and Mourad 2020).…”

Evaluation of Proximate, Fatty Acids, Amino Acids and Total Cholesterol Contents of Selected Decapod Crustaceans from Badagry Creek, Lagos, Nigeria

“…Decapods are omnivorous and act as scavengers, they eat both plant and animal materials. They are found in brackish and fresh waters in Nigeria, they are of great importance to human health due to their richness in essential lipids, proteins, and other nutrients such as minerals, vitamins and omega-3 fatty acid, a daily nutrient requirement recommended by the American Heart Association which helps in brain development and gives protection against stroke and heart diseases [6,7,8].…”