this study evaluates the influence of yanã½klar creek on the water quality of fethiye gulf. accordingly, this study demonstrates (i) change in the water quality of fethiye gulf from 2006 to 2007; (ii) the water quality classification of the yanã½klar creek feeding fethiye gulf; and (iii) how land-based fish farm influences yanã½klar creek water quality in a fethiye-gã¶cek specially protected ar...

Fish is a unique source of micro-nutrients. However, many parts of larger fish, such as the head and the bones, are discarded during fish processing despite the high levels of nutrients, and particularly micronutrients found in these parts. Thus the promotion and use of fish byproducts to create low-cost, high-quality food could help reduce malnutrition. This practice illustrates the nutritiona...

When external loading is small, as it is in Lake Tanganyika, the internal redistribution of nutrients can be important for ecosystem productivity. One conduit for this redistribution is fish. Research has been conducted on the transfer of nutrients into the pelagic or benthic ecosystems by benthic or pelagic fishes, respectively, but less attention has been paid to the recycling of nutrients by...

There is controversy about the risks and benefits of consuming fish. Fish consumption provides nutrients, some of which are essential for brain growth and development. All fish, however, contain methyl mercury (MeHg), a known neurotoxicant. The toxic effect of MeHg seems most damaging during brain development, and thus, prenatal exposure is of greatest concern. At present the level of prenatal ...

Humans who eat fish are exposed to mixtures of healthful nutrients and harmful contaminants that are influenced by environmental and ecological factors. Marine fisheries are composed of a multitude of species with varying life histories, and harvested in oceans, coastal waters and estuaries where environmental and ecological conditions determine fish exposure to both nutrients and contaminants....

Nutrients such as nitrogen (N) and phosphorus (P) are critical for supporting the productivity of plants and microorganisms at the base of aquatic food webs. Fish play an important role in nutrient cycles because they store a large proportion of ecosystem nutrients in their tissues, transport nutrients farther than other aquatic animals and excrete nutrients in dissolved forms that are readily ...

The detritivorous fish, gizzard shad (Dorosoma cepedianum), provides nutrients to phytoplankton in reservoirs by ingesting organic detritus associated with sediments and excreting substantial quantities of nutrients such as N and P in soluble forms that are highly available to phytoplankton, We estimated nutrient excretion by gizzard shad in a eutrophic reservoir (Acton Lake, Ohio) during April...

The past was a world of giants, with abundant whales in the sea and large animals roaming the land. However, that world came to an end following massive late-Quaternary megafauna extinctions on land and widespread population reductions in great whale populations over the past few centuries. These losses are likely to have had important consequences for broad-scale nutrient cycling, because rece...