Assessment of elemental composition in commercial fish of the Bay of Cádiz, Southern Iberian Peninsula

Guerra-Garcı́a, José M.; Calero-Cano, Sandra; Donázar-Aramendía, I.; Giráldez, Inmaculada; Morales, E.; Arechavala-López, Pablo; Cervera-Currado, J.L.

doi:10.1016/j.marpolbul.2022.114504

Cited by 8 publications

(2 citation statements)

References 56 publications

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“…Our results for the macrominerals in the fish from the three water qualities were in the same order of magnitude (Ca > K > Na > Mg), compared to those reported for Oreochromis mossambicus (Ullah et al, 2022). However, these findings did not match those found in the literature for some freshwater species (Guerra-García et al, 2023;Islam et al, 2021;Jim et al, 2017), but in all studies K > Na. Our findings, therefore, suggest that MBR and maturation pond-treated water do not affect the capacity of fish to absorb and assimilate these trace minerals from water and diet.…”

Section: Mbrcontrasting

confidence: 64%

Growth Performance and Biochemical Composition of Nile Tilapia (Oreochromis niloticus) Reared in Membrane Bioreactor Treated Wastewater

Mwendwa,

Wawire,

Kahenya

et al. 2023

JAS

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The aquaculture sector in Africa has great potential for growth; however, it faces several challenges, one of them being the scarcity of clean water. This prompts the need for water recycling. The present study was conducted to investigate the effects of rearing Nile tilapia (Oreochromis niloticus) using municipal wastewater treated with membrane bioreactor (MBR) technology. A total of 270 Nile tilapia fingerlings (0.15±0.05 g) were reared in three treatment groups in triplicate. There were 2 treatments, including; MBR treated wastewater and stabilization pond treated wastewater (maturation pond), while the municipal tap water was used as the control. The growth performance (weight and length) of the fish was monitored over a 24-week period. After the experimental period, the biochemical composition of the fish muscle was analysed using standard AOAC methods. The results showed that the highest weight gain, length gain, survival rate, and specific growth were obtained in the fish in the control followed by the MBR treatment. Additionally, the crude protein, as well as the crude fiber and dry matter, were significantly higher in the fish in the maturation ponds at 23.10%, 0.29%, and 25.35%, respectively, while the crude ash was highest in the MBR at 1.22%. Results also showed that the MBR and maturation pond treatments meet the permissible levels for BOD, COD, NH4, and NO3 for water to be used in aquaculture. The bioaccumulation of heavy metals in the fish was mainly from the feed, with copper being the highest contaminant at 1.75 mg/100 g. In conclusion, both the MBR and maturation pond treated wastewater are viable for use in the rearing of Nile tilapia without adverse effect on the growth. However, MBR treatment showed better growth performance, suggesting that it could be used to increase productivity in fish farming.

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Section: Mbrcontrasting

confidence: 64%

Growth Performance and Biochemical Composition of Nile Tilapia (Oreochromis niloticus) Reared in Membrane Bioreactor Treated Wastewater

Mwendwa,

Wawire,

Kahenya

et al. 2023

JAS

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show abstract

“…The European regulation sets contamination thresholds for only three specific inorganic trace elements, Pb (lead), Cd (cadmium) and Hg (mercury). In contrast, other nations, such as Turkey and Greece have adopted thresholds for a larger set of contaminants (for a comprehensive review, refer to Guerra-García et al, 2023). Notably, trace element levels in sardine specimens from the present study remained below the threshold values for fish consumption set by most international regulations except for As that exceeded these limits.…”

Section: Discussionmentioning

confidence: 99%

Molecular response to multiple trace element contamination of the European sardine

Beauvieux,

Fromentin,

Saraux

et al. 2024

Preprint

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In marine ecosystems, the presence of trace elements resulting from anthropogenic activities has raised concerns regarding their potential effects on marine organisms. This study delves into the intricate relationship between trace element contamination and the physiological responses of a key marine species in the Mediterranean Sea: the European sardine. Since 2008, this species has been experiencing a significant crisis in the region, prompting numerous studies to investigate the potential factors behind the dramatic decline in sardines size, age, and body condition. However, thorough information on chemical contamination by trace elements and its physiological impact on this species was lacking. We found evidence for the accumulation of multiple elements in sardines, with a light East-West contamination gradient within the Gulf of Lions. While macro-physiological parameters (i.e. body condition) were not affected by contamination, pathways involved in cellular organization and response to stress were clearly upregulated, particularly in the liver, but also in muscle. In addition, a global upregulation in processes linked to the immune system, lipid homeostasis and oxidative stress was recorded in the liver. The associated energetic cost may add a substantial burden to sardines that already face multi-factorial constraints. This study also allows to pinpoint biomarkers of exposure and effects that may be important for monitoring Mediterranean sardine health. The results of this study and particularly the complex changes in protein expression demonstrate the need for future studies to test the concomitant effects of multiple stressors acting simultaneously, including large scale contamination.

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Assessment of health risks due to toxic metals in demersal fish captured from Saros and Edremit Bays, Northern Aegean Sea

Dogruyol,

Erkan,

Özden

et al. 2023

Environ Sci Pollut Res

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Assessment of elemental composition in commercial fish of the Bay of Cádiz, Southern Iberian Peninsula

Cited by 8 publications

References 56 publications

Growth Performance and Biochemical Composition of Nile Tilapia (Oreochromis niloticus) Reared in Membrane Bioreactor Treated Wastewater

Growth Performance and Biochemical Composition of Nile Tilapia (Oreochromis niloticus) Reared in Membrane Bioreactor Treated Wastewater

Molecular response to multiple trace element contamination of the European sardine

Assessment of health risks due to toxic metals in demersal fish captured from Saros and Edremit Bays, Northern Aegean Sea

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