Consulta: creatorFacets:"Yahia, Mohamed Nejib Daly"
Registros recuperados: 2
Data/hora: 10/06/2024 06:28:26

Environmental controlling factors of copepod communities in the Gulf of Tunis (south western Mediterranean Sea)
Provedor de dados: 5
Autores: Ben Lamine, Yosra; Pringault, Olivier; Aissi, Mehdi; Ensibi, Cherif; Mahmoudi, Ezzeddine; Kefi, Ons Daly Yahia; Yahia, Mohamed Nejib Daly.
The copepod community structure and the distribution of the main groups of zooplankton were studied along an inshore-offshore gradient in the Gulf of Tunis during the rainy and dry seasons of 2007-2008. Hydrological parameters were also measured to assess the potential role of abiotic and biotic factors in the distribution of copepod species. The copepod community in the Gulf of Tunis comprises 86 species dominated by Paracalanus parvus, Clausocalanus lividus, Centropages kroyeri and Acartia clausi. Time had a greater influence than space (horizontal and vertical gradients) in shaping the copepod community structure with a significant influence of the seasons; winter (cold and rainy) resulted in hydrological conditions that were strongly different from...
Tipo: Text
Palavras-chave: Copepod diversity; Multivariate analysis; Temperature; Salinity; Top-down control; Competition.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00275/38670/73416.pdf

A novel index based on planktonic copepod reproductive traits as a tool for marine ecotoxicology studies
Provedor de dados: 5
Autores: Hussain, Mohamed Bakr; Laabir, Mohamed; Yahia, Mohamed Nejib Daly.
Copepods are excellent bioindicators of climate change and ecosystem pollution in anthropized coastal waters. This work reviewed the results of previous studies examining changes in egg production rate (EPR), hatching success (HS), and nauplius survival rate (NSR) in natural conditions and in the presence of pollutants, including heavy metals and organic contaminants such as polycyclic aromatic hydrocarbons (PAHs) and persistent organic pollutants (POPs). At high concentrations, cadmium and silver induce an increase in EPR in the copepods Acartia tonsa and Acartia hudsonica, while exposure to mercury decreases EPR in adults by 50%. All three metals affect HS, with mercury inducing a stronger effect than cadmium and silver. Cadmium affects reproductive...
Tipo: Text
Palavras-chave: Planktonic copepods; Reproductive traits; Ecotoxicology.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00623/73498/72789.pdf