Dispersant use in nearshore areas is likely to increase the exposure of aquatic organisms to petroleum. To measure the toxicity of this controversial response technique, golden grey mullets (Liza aurata) were exposed to mechanically dispersed oil, chemically dispersed oil, dispersant alone in seawater, water-soluble fraction of oil and to seawater as a control treatment. Several biomarkers were...

Grey-mullet are heterosexual fish and gonochorism is the general rule. Cytological cnalysis of sex-differentiation was studied by light microscopy (Stenger, 1959 ; Leray, 1968 ; Thong, 1969 ; Cassifour, 1975), but germ-cell characteristics were not sufficiently defined at this level and no distinction could be made between primordial germ-cells, oogonia and spermatogonia. Electron microscopy ha...

to investigate the effects of different hormonal treatments on the oocyte maturation in wild- caught grey mullet ( mugil cephalus ), fish were subjected to 4 different hormonal treatments as follows: (a) a control group received 0.5 ml/kg b.w. physiological saline, (b) fish injected with 20 mg/kg carp pituitary extract (cpe) as a priming dose followed by 200 µg/kg sgnrha as resolving dose, (c) ...

The purpose of the study is to analyze changes in internal organs golden mullet specious caught May 2022 scientific expeditions western part Caspian Sea. Mature mullets were examined. species weighed and measured. There made 152 histological sections 10 (liver, spleen, gills, ovaries, muscles). studied 3-4 years old. collected samples processed by classical techniques. According results conduct...

pesticides are used extensively in agricultural lands in northern provinces of iran which makes river ecosystems more vulnerable to pesticides pollution. this study was conducted in three river estuaries (babolrud, tajanrud and gorganrud), focusing mainly on the concentration levels of organophosphate pesticides (diazinon, malathion, azinphos-methyl) in the muscle tissue of golden mullet fish, ...