The aim of this review is to identify problems, find general patterns, and extract recommendations for successful management using nontraditional biomanipulation to improve water quality. There are many obstacles that prevent traditional biomanipulation from achieving expectations: expending largely to remove planktivorous fish, reduction of external and internal phosphorus, and macrophyte re-e...

In externally fertilizing species, the gametes of both males and females are exposed to influences environment into which they released. Sperm sensitive abiotic factors such as salinity, but also affected by biotic sperm competition. this study, authors compared performance three goby painted goby, Pomatoschistus pictus, two-spotted flavescens, sand minutus. These species differ in their distri...

Abstract The monkey goby Neogobius fluviatilis is an invasive Ponto-Caspian fish that enters habitats of the native gudgeon Gobio gobio in European freshwaters, likely belonging to same prey guild. Their abilities detect and avoid predation have been poorly understood, although these traits may contribute competitive advantage drive invasion success goby. We tested intra- interspecific response...

the gobies are non-commercial fishes in the iranian waters of the caspian sea for which population dynamics and stock status are poorly known. in this survey, we tried to define species diversity and catch per unit effort (cpue) of gobiidae by using beach seine nets in salmanshahr, the southern caspian sea. from march 2011 to april 2012, 224 specimens representing 4 gobiid species, belonging to...

The gobies are non-commercial fishes in the Iranian waters of the Caspian Sea for which population dynamics and stock status are poorly known. In this survey, we tried to define species diversity and catch per unit effort (CPUE) of Gobiidae by using beach seine nets in Salmanshahr, the southern Caspian Sea. From March 2011 to April 2012, 224 specimens representing 4 gobiid species, belonging to...

The structure of aquatic food webs has changed dramatically at the global scale. Overfishing, persistent chemical contamination, and the rapid spread of non-indigenous species have caused the loss of the “big fish”—traditional predator species that once formed the basis of the fishing industry. This decline in pelagic diversity, coupled with the effect of invasive species like the zebra mussel,...

The changes of fatty acid compositions, volatile components, and microbial flora bighead carp heads during fresh transportation were investigated. brain, eye muscle, muscle near the incision (on abdomen 5 cm away from gills), jaw at ambient temperature (25°C) for 6 h simulated (underwent ice storage vibration) 36 72 evaluated. content monounsaturated acids (38.98%) in four parts was highest fol...