Growth performances and bioaccumulation of heavy metals in Anabas testudineus (Bloch, 1792) cultured using different market feeds

Abstract

The study was conducted to determine growth performances and bioaccumulation of Cr, Cu, Cd, Pb and Ni in fish organs such as intestines, muscle and gills of study species after culturing them for twelve weeks by using different commercial fish feeds. The highest average daily gain (ADG, g/day) and specific growth rate (SGR; %/day) were found in fish fed quality feed and lowest values were found in the fish fed mega feed. Best feed conversion ratio (FCR) value was found in fish fed quality feed among five different feeds. In cultured Koi, the concentration of heavy metals were found higher than initial concentration in fish feeds and collected fingerling samples. Heavy metal levels in cultured fish was Cu > Pb > Cr > Cd > Ni and levels of bioaccumulation in individual organs was intestines > gills > muscle. The concentration of Cu, Pb and Cr exceed the tolerable limit approved by FAO in fishes cultured with the experimental feeds. Considering the present study, Koi cultured with these experimental feeds may not safe for human consumption.
 Bangladesh J. Zool. 47(1): 77-88, 2019

Presence of antibacterial substances, nitrofuran metabolites and other chemicals in farmed pangasius and tilapia in Bangladesh: Probabilistic health risk assessment

“…According to Rajeshkumar and Li [ 22 ], there are two main ways heavy metals can bioaccumulate in fish; by direct consumption of water and feed through the digestive tract, and non-dietary routes across permeable membranes, such as muscle and gills. Fatema et al [ 57 ] reported the accumulation of heavy metals such as Pb, Cd, and Cr from commercial fish feeds in Bangladesh caused higher concentrations of heavy metal in fish than the permissible limits set by the FAO and WHO. The results of the present study revealed that almost all types of fish feed used in pangasius and tilapia farms were contaminated with heavy metals above the permissible limit.…”

Heavy metals in wild and cultured shrimp, supplied feeds, and their habitats: Assessing public health risk

“…This is due to shrimp feed include rice bran, wheat, fish, shrimp, soy, beef liver, silkworms, and earthworms that contain substantial levels of heavy metals [ 1 ]. In the fish feeds manufactured by some well-known companies of our country, Cr concentrations were measured at 8.21 mg/kg and 15.55 mg/kg, respectively[ 25 ]. Furthermore, the Cr ranged from 20.25 to 301.5 mg/kg in the starter, grower, and nursery fish feeds formulated by another feed company of Bangladesh[ 24 ].…”

“…Furthermore, HMs concentrations in seafood such as fish, shrimp, lobster, and crabs, as well as surface water and sediments, have been documented from Saint Martin Islandalong the Bay of Bengal [ [21] , [22] , [23] ]. In addition, some authors [ 1 , 8 , [24] , [25] , [26] , [27] ] have documented the HMs concentration in different commercial fish and shrimp feeds in Bangladesh. HMs in water, sediments and P .…”

“…In Bangladesh, shrimp farming provides a living for around 85 million people (mainly coastal residents), is the second-largest source of foreign exchange, and accounts for about 5% of the country's GDP [ 19 ].Therefore, stringent quality control measures should be in place throughout the supply chain, ensuring that the exported shrimp meets the rigorous European Union's food safety regulations to protect consumers' health and wellbeing. Earlier studies have focused on either heavy metal in shrimp or in any component of its ecosystem[ 1 , [24] , [25] , [26] ]. However, a holistic assessment of heavy metals in wild and cultured shrimp, supplied feeds, and their habitats from Bangladesh and the rest of the world have meagerly been studied.…”