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Reducing Nitrate and Phosphate Concentrations in Shrimp Wastewater Aquaculture Using Gelidium corneum

Indraswari Nabila, Adharini Ratih Ida

Ecological Engineering & Environmental Technology

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2022

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Vol. 23, iss. 5

137--144

EN

Shrimp culture wastewater contains residual feed and shrimp metabolism. Shrimp wastewater if not managed properly will be harmful to the long term viability of the farming itself and threatens environmental sustainability. This study aims to determine the potential and effectiveness of Gelidium corneum with different densities as a biofilter for vaname shrimp culture waste. This study used a completely randomized design method consisting of 3 treatments and 3 replications using different density treatments, namely T1 (1 gL-1); T2 (2 gL-1); and T3 (3 gL-1) in an aquarium volume of 30 L. The parameters observed included the concentration of nitrate, phosphate, temperature, TDS, TSS, salinity, DO, pH. Absorption effectiveness and growth of G. corneum were measured at the beginning and end of the study. G. corneum is able to reduce the concentration of phosphate in water is higher than lowering the content of nitrate. G. corneum with a density of 1 gL-1 showed the best performance in absorbing nitrate by 8% on day 15. While the 2 gL-1 treatment was able to reduce the phosphate concentration by 92% in 25 days. Absorption of Total Nitrogen content in the thallus obtained in the treatment of 2 gL-1 was 32% and total phosphate was 58% for 25 days. Therefore G. corneum can be used as a candidate for commodity in Integrated Multi Trophic Aquaculture (IMTA).

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Assessment of Trace Metal Concentrations in Three Seafood Deep-Sea Fished Caught in the Moroccan Atlantic

Akhouchal Ihya, Ait Alla Aicha, Hajji Sara, Agnaou Mustapha, Moukrim Abdellatif

Journal of Ecological Engineering

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2021

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Vol. 22, nr 9

87--98

EN

The investigation within the framework of this study was carried out on three marine species fished off in Moroccan coasts, namely: a fish, the sole (Solea Vulgaris), a cephalopod, the cuttlefish (Sepia Officinalis) and a crustacean, the pink shrimp (Parapenaeus Longirostris). The aims of this study were assessing the level of concentration in these three marine species, of three metallic trace elements: lead (Pb), cadmium (Cd) and mercury (Hg) and giving a reflection on the way in which Moroccan deep-sea fishing professionals can join a food safety management system to ensure the safety of their product and promote their competitiveness. Sampling was carried out at the port of Agadir city after landing of the deep-sea fishing boats which operate beyond 10 nautical miles, offshoring the seabed of Agadir for pink shrimp (Parapenaeus Longirostris), and in Dakhla city offshore for sole (Solea Vulgaris) and cuttlefish (Sepia Officinalis). Trace metal analysis was performed on individual muscles belonging to the three species. The results of the conducted investigations show that the Pb content varies between 0.01 ppm and 0.27 ppm in Solea Vulgaris; between 0.015 ppm and 0.16 ppm in Sepia Officinalis and between 0.022 ppm and 0.38 ppm for Parapenaeus Longirostris. For Cd, the concentrations vary between 0.0047 ppm and 0.050 ppm in Solea Vulgaris; between 0.0025 ppm and 0.254 ppm in Sepia Officinalis and between 0.0065 ppm and 0.11 ppm in Parapenaeus Longirostris. Concerning Hg, the contents vary between 0.0006 ppm and 0.075 ppm in Solea Vulgaris; between 0.0008 ppm and 0.05 ppm in Sepia Officinalis and between 0.0016 ppm and 0.09 ppm in Parapenaeus Longirostris. It appears from this study that the metal contents detected at the level of the three species of seafood investigated are below the regulatory thresholds. These results can be considered as the first basis for validating the control measure linked to the absence of metallic contamination of the three species in the sites studied.

3

Composition of fatty acids and sterols composition in brown shrimp Crangon crangon and herring Clupea harengus membras from the Baltic Sea

Mika A., Gołębiowski M., Skorkowski E.F., Stepnowski P.

Oceanological and Hydrobiological Studies

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2012

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Vol. 41, No. 2

57-64

EN

The composition and the content of lipids, fatty acids and sterols during spawning (spring) in different tissues of herring Clupea harengus membras were compared with quantities of lipid compounds in abdomen muscle of brown shrimp Crangon crangon. The largest quantity of fatty acids in lipids (93.7%), was observed in fish muscle. The liver was characterized by a higher content and variety of sterols (about 4.6 times more than in fish muscle), and in fish sperm, additional fatty acids were identified and the highest amount of EPA and DHA (22% and 34% of fatty acids, respectively) was recorded. The brown shrimp, despite its small size, contained significantly more lipids than the Baltic herring per g of tissues. Fatty acids were at the same level (83% of the total lipids in shrimp muscle and 93.7% in fish muscle), but the amount of sterols was significantly higher in the muscle of shrimp (5.50 š0.31 mg g-1, 17% of total sterols, n=10) than in fish muscle (1.33 š0.04 mg g-1, 6.3% of total lipids, n=6). And thus, shrimp is a good source of food for higher trophic levels, and in consequence – a good source of PUFAs for humans. With these results we prove that shrimp and herring play an important role in the supply of EFAs, which has great pharmaceutical and medical benefits.

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Gospodarka odpadami w akwakulturze

Biegańska J., Piątkowska E.

Archiwum Gospodarki Odpadami i Ochrony Środowiska

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2012

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Vol. 14, nr 2

43-50

PL

Nieustanny rozwój światowej produkcji przemysłowej akwakultury kieruje uwagę w stronę udoskonalania technologii hodowlanych, optymalizacji produkcji i minimalizacji odpadów z niej powstających. Rosnące zapotrzebowanie na żywność, generowanie ogromnej ilości odpadów produkcyjnych i ograniczone zasoby wodne motywują do dalszej pracy w dążeniu do osiągnięcia zrównoważonej gospodarki odpadami w tej dziedzinie. Celem artykułu jest analiza i ocena stosowanych w akwakulturze procesów i technologii w zakresie gospodarki odpadami, ze szczególnym uwzględnieniem hodowli krewetek, służący za przykład produkcji tej gałęzi przemysłu.

EN

Continuous development of world industrial production of aquaculture directs attention toward improving the breeding technology, production optimization and minimization of waste arising during production processes. The growing demand for food, generating huge amounts of wastes and limited water resources, motivate to further work in achieving sustainable waste management in this area. This article aims to analyze and evaluate the processes and technologies used in aquaculture in waste management range, with particular emphasis on shrimp farming, serving as an example of this production branch.

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Effect of cadmium and glutathione on malic enzyme activity in brown shrimps (Crangon crangon) from the Gulf of Gdańsk

Niedźwiecka N., Mika A., Białk-Bielińska A., Stepnowski P., Skorkowski E.F.

Oceanologia

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2011

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No. 53 (3)

793-805

EN

The high level of cadmium in the abdominal muscle of the brown shrimp Crangon crangon is due to the serious pollution of the water in the Gulf of Gdańsk. The inhibition of malic enzyme (ME) activity by cadmium, and in consequence the reduced formation of NADPH, could interfere with cellular mechanisms for detoxifying the organism and reducing oxidative stress. The reduced glutathione (GSH) concentration in the abdominal muscle of C. crangon was calculated to be 5.8 mM. The objective of this study was to evaluate the part played by GSH in the effect of cadmium on the activity of NADP-dependent malic enzyme from abdominal muscles of brown shrimps. This enzyme is activated by certain divalent cations (Mg, Mn). The results demonstrate that cadmium inhibits ME activity from shrimp muscle, and that GSH and albumin can reduce this cadmium-inhibited NADP-dependent malic enzyme activity.