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...

abstract~ Tile primary purpose of this paper is to present a set of conditions that constrain accent placement in focused nominally ptemodified NPs. Selkirk (1984) argues that if the premodifier is an argument of the head, then the head can be deaccented. I agree with Selkirk's proposal and argue that what is essential is not whether the premodifier is a grammatical argument of the head noun, b...

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,...

Abstract Biological invasion is a strong threat to native biodiversity, with limnic systems being especially vulnerable due historical separation and resulting prey naivety. The naivety hypothesis states that species may not be able recognize novel predators lack of common evolutionary background and, therefore, become easy targets. In laboratory experiment, we added cues European bullhead ( Co...

A new hovering goby or dartfish is described from material collected in Mexico, Costa Rica and Panama. It is the only species of the cosmopolitan genus Ptereleotris known from the eastern Pacific. It is distinguished from its Western Atlantic and Indo-Pacific congeners by its low fin-ray counts, prominent median keel on the ventral margin of the head, lanceolate caudal fin with dusky lower half...

To gain a deeper understanding of how environmental conditions affect brain plasticity, brain size was explored across different seasons using the invasive round goby Neogobius melanostomus. The results show that N. melanostomus had heavier telencephalon in the spring compared to the autumn across the two years of study. Furthermore, fish in reproductive condition had heavier telencephala, indi...