The global marine ornamental fish trade is dominated by wild collected fishes, and the contribution from hatchery production less than 10% of total. Hatchery considered to be only long-term sustainable option reduce fishing pressure on population also safeguard delicate coral reef ecosystem, which houses most species. Among hatchery-produced fishes that are being traded, clown form a dominant g...

Galaxies are thought to be surrounded by massive halos of dark matter, each outweighing its galaxy by a factor of about eight. The visible part of a galaxy, occupying the inner 10% of the halo, consists of a mixture of stars and gas. Galaxies harbour a giant black hole at their centres, which in some cases is actively fuelled as it sucks in surrounding gas. In especially active galaxies, called...

The crystal structure of a HECT E3 enzyme has been captured as it transfers ubiquitin to a target protein, revealing the dramatic changes in shape that enable it to modify particular residues in its targets.

The traveller, George Shelvocke, sailing along the coast of South America in 1718, wrote: " whales, grampuses, and other fish of a monstrous bulk, are in such numbers off the coast of Patagonia that they were really offensive to us very often. For they would come sometimes so close to us as to stifle us with their stench when they blew, and would lie so near us that I have frequently thought it...

Some DNA viruses overcome plant defenses by producing a suppressor protein that blocks the silencing of viral genes.

the fish assemblage and diversity in relation to water quality of three coastal rivers sita, swarna and varahi of udupi district, karnataka, india was studied. 71 species representing 7 orders, 20 families and 41 genera were recorded from 21 sites along the three rivers. species composition varied longitudinally in relation to the environmental factors of the habitat. the downstream change in t...

The upper Gila River basin is one of the few unimpounded drainage basins west of the Continental Divide, and as such is a stronghold for endemic fishes in the region. Nevertheless, multiple nonindigenous fishes potentially threaten the persistence of native fishes, and little is known of the trophic ecology of either native or nonnative fishes in this system. Gut contents and stable isotopes (C...

The U.S. Atlantic coastal pelagic longline fishery that targets tunas and swordfish also interacts with a wide range of non-target species ncluding billfishes and sea turtles. Preliminary studies indicate that a change in terminal gear from J-style hooks to circle hooks may reduce ycatch mortality, but the effects of this change on catch rates of target species are unclear. To evaluate this, we...

In response to the global fisheries crisis, characterized by falling abundances of resource species, falling catches, increasing habitat destruction, and extremely high subsidies, the advocates of whaling have been advancing a new rationale for hunting of marine cetaceans. They claim that marine mammals, particularly the great whales, compete with humans for fish resources; that efforts to prot...

Pleuronectiforme fishes of the Persian Gulf coastlines along Khuzestan, Bushehr and Hormozgan provinces were morphometrically and meristically studied from April 2003 to September 2005, in order to identify species. In this experiment, 1551 fish samples were caught by trawl or collected from fish markets. The sampling was carried out in 27 regions seasonally. Thirty six traits and parameters in...