Vegetation changes in saltmarsh habitat can influence fish assemblages and abundance. In Tasmania, Australia, mid-latitude succulent communities have been invaded by the introduced tall grass, Spartina anglica. Eradication efforts ongoing since 1990s with purported benefits for access to intertidal foraging grounds, but a lack of knowledge impact S. anglica on limits understanding effectiveness...

background: in anzali lagoon, there are some endemic and exotic fishes. the present study was conducted to compare the parasitic fauna of blicca bjeorkna , as an endemic fish and hemicul­ter leucisculus , as an introduced fish to the lagoon. methods: a parasitological investigation was done on 78 specimens of b. bjoerkna and 114 of h. leu­cisculus . the fishes were collected from august 2009 to...

Aim Geographical variation in parasite diversity is examined among populations of fish in their original heartland and in areas where they have been introduced. The diversity in heartland and introduced populations is contrasted, and also compared with the expectations of a null model. Location Data on the parasite communities of two salmonid fish species were obtained: the rainbow trout Oncorh...

Adjacent food webs may be linked by cross-boundary subsidies: more-productive donor systems can subsidize consumers in less-productive neighboring recipient systems. Introduced species are known to have direct effects on organisms within invaded communities. However, few studies have addressed the indirect effects of nonnative species in donor systems on organisms in recipient systems. We studi...

A marsupial robotic fish system including a mother robotic fish and a daughter robotic fish is proposed. The mother robotic fish, with strong ability of movement, can transport the daughter robotic fish in its cabin. The structures of these two robotic fish are presented and fish-like motions are introduced. A dynamic light source tracking method of the daughter robotic fish is given to follow ...