Morphology of the Nile River due to a Flow Rate over the Maximum Current: Case Study Damietta Branch

Negm, Abdelazim; Abdel-Aziz, Tarek M.; Salem, Mohamed N.; Yousef, W. M.

doi:10.1007/698_2017_3

Cited by 5 publications

(2 citation statements)

References 5 publications

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“…Also, a pH range of 6.1-8.0 was deemed adequate for fish reproduction and survival (Makori et al, 2017). According to the results from Soltan et al (2016), reduced water transparency can be linked to a higher abundance of phytoplankton, but in lakes, it is possible that it can be due to untreated wastewater (Negm et al, 2017). Total ammonia was also found to be higher in fish farms than in lakes, which might be due to large fish stocks, fish excretion, and the breakdown of extra un-consumed diet, all of which are ammonia sources in ponds.…”

Section: Discussion Water Quality and Fish Parasites Relationshipmentioning

confidence: 99%

Fish Parasites and Heavy Metals Relationship in Wild and Cultivated Fish as Potential Health Risk Assessment in Egypt

Radwan

Abbas

Afifi

et al. 2022

Front. Environ. Sci.

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Despite wide studies of biomonitoring aquatic environment through dynamics of host–parasite interaction, bio-indicators to track the influence and accumulation of heavy metals on fish are still few. The present study sheds light on the relation between fish parasites and heavy metals as it threatens fish’s health and, as a consequence, that of humans after fish consumption. Samples of Nile tilapia (Oreochromis niloticus) were collected in Burullus Lake, a wild fish source, and from a private fish farm in Kafr El-Sheikh Governorate, in Egypt. They were exposed to various pollutants associated with anthropogenic activities to determine the levels of accumulation of Fe, Zn, and Cu, along with the top three most toxic metals (As, Cd, and Pb) in water and fish tissues of gills, intestine, liver, and muscles in both wild and farmed O. niloticus. The results showed the order of abundance: Fe < Zn < Pb < Cu < As < Cd. In waters of both farmed and wild fish, there was a significant negative relation between parasite prevalence and heavy metals, including Zn, Pb, and As. Also, there was a significant positive relation between parasite prevalence with Cu while no significant relation was found with Fe and Cd. Heavy metal content was significantly higher (p > 0.05) in non-infected than infected farmed and wild O. niloticus. In addition, a significantly decreased concentration (p > 0.05) of essential heavy metal was recorded in wild fish compared to farmed specimens, while non-essential heavy metal was significantly higher (p > 0.05) in wild compared to farmed fish. Bioaccumulation factors (BAF) of different organs of O. niloticus were ranked in ascending order: Liver > Gills > Intestine > Muscles. In general, the risk assessment showed safe human consumption of farmed and wild fish under the reported environmental conditions in this study. Moreover, the parasite's presence can be adopted as a surrogate indicator to estimate the potential impact of heavy metal pollution and accumulation.

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Section: Discussion Water Quality and Fish Parasites Relationshipmentioning

confidence: 99%

Fish Parasites and Heavy Metals Relationship in Wild and Cultivated Fish as Potential Health Risk Assessment in Egypt

Radwan

Abbas

Afifi

et al. 2022

Front. Environ. Sci.

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show abstract

“…1). Along its main basin, the Damietta Branch serves as an important water resource for agricultural, domestic, and industrial activities (Negm et al 2017). However, this vital water artery and its estuary are negatively influenced by fish nitrite (NO 2 -), nitrate (NO 3 -), ammonium (NH + ) and soluble reactive phosphorus (SRP), were analysed by molecular absorption spectrometry and silica (as SiO 2 ) was estimated by the molybdosilicate method (Clesceri et al 2000).…”

Section: Methodsmentioning

confidence: 99%

Seminavis aegyptiaca sp. nov., a new amphoroid diatom species from estuary epilithon of the River-Nile Damietta Branch, Egypt

Saber¹,

b>Abdullah²,

El‐Belely³

et al. 2020

Fottea

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During a recent floristic-taxonomic study on the algal flora, including diatoms, from the estuary of the Damietta Branch of the Nile in Egypt, an interesting epilithic diatom species belonging to the genus Seminavis (Naviculaceae) was collected and investigated using both light and scanning electron microscopy. This new diatom species shares morphologically some taxonomic diagnostic features with other related taxa such as S. insignis, S. robusta, and S. ventricosa. However, it still differs by having ventral central striae that are shorter and more or less straight in the middle of the smaller frustules to be clearly radiate in the larger ones and then become geniculate and only radiate near the poles, the central raphe endings are externally more distantly spaced than in the similar species, the elongate central nodule is internally less prominent, and the areola density is much denser. Therefore, we here describe it as Seminavis aegyptiaca sp. nov. Hydrochemical analyses revealed that S. aegyptiaca commonly inhabits typical marine, with a weak tendency towards brackish water, habitats. It was found to be tolerant to meso-eutrophic, nutrient-enriched conditions, based on the data available on seasonal concentrations of N and P compounds. These findings not only contribute to the inventory of Egyptian diatoms, but also increase our understanding of the autecology and distribution of this relatively poorly-known diatom genus.

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Introduction

El-Ramady¹,

Alshaal²,

El-Henawy³

et al. 2018

World Soils Book Series

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Morphology of the Nile River due to a Flow Rate over the Maximum Current: Case Study Damietta Branch

Cited by 5 publications

References 5 publications

Fish Parasites and Heavy Metals Relationship in Wild and Cultivated Fish as Potential Health Risk Assessment in Egypt

Fish Parasites and Heavy Metals Relationship in Wild and Cultivated Fish as Potential Health Risk Assessment in Egypt

Seminavis aegyptiaca sp. nov., a new amphoroid diatom species from estuary epilithon of the River-Nile Damietta Branch, Egypt

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