Concentration of Selenium and Mercury in six species of fishes from Shatt Al-Arab River, Iraq

Abdulsahib, Hassan T.

doi:10.21276/ijaq.2012.9.2.6

Cited by 1 publication

(2 citation statements)

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“…In wild fish from different world areas, Se concentration in the body is typically below 1 μg g -1 [52,73,78,79] or slightly above [73,78,79]. In cultured Atlantic salmon, 3.4 μg Se g -1 was recorded [74].…”

Section: Discussionmentioning

confidence: 99%

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Survival of Embryos and Fry of Sea Trout (Salmo trutta m. trutta) Growing from Eggs Exposed to Different Concentrations of Selenium during Egg Swelling

Dziewulska

Kirczuk

Czerniawski

et al. 2021

Animals

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Adequate selenium (Se) availability enhances the health and growth of organisms, but overdose of it can be harmful and pathogenic. The study's objective was to analyse the impact of short-term exposure of sea trout fertilised eggs to inorganic selenium (SeO2) at concentrations from 0 to 32 mg Se L-1 to find the optimal and toxic dose of Se on early fish development. Se accumulated in the body, embryos' survival rate, and growth in the first four months of life was examined. Swelling of fertilised eggs in water supplemented with Se at a concentration from 0.5 to 8 mg Se L-1 was associated with a slightly positive impact on the hatching rate. At higher Se concentration, a harmful effect on the survival of the embryo was observed. The survival of fry was similar in all groups, while the fry length and weight correlated positively with Se concentration in its body. Immersion of fertilised eggs in water enriched with Se during egg swelling can constitute a method to supplement the element to non-feeding stages of fish. In selenium-poor areas, this innovative method can be implemented in aquaculture to improve breeding outcomes. Se concentration should be adjusted to the chemical compound, fish species, and Se’s content in the yolk.

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Section: Discussionmentioning

confidence: 99%

“…* selenium content in dry weight calculated from wet weight assuming 87.5% moisture of hatch after Elliott [72]. ** selenium content in dry weight calculated from wet weight assuming 75% moisture of fry after Abdulsahib et al [73]; Atanasoff et al [74].…”

Section: Selenium Content In the Body Of Hatch And Frymentioning

confidence: 99%