4b) visual observations as the sample is brought near the side of the flame, in the flame, and out of the flame, 4c) odor as the fibres burn, 4d) characteristics of the ash including the colour and texture. 4e) The man-made fibers will decompose and melt. much quicker than either the animal or vegetable fibers.
Bluefin tuna swim in a holding pen in Australia. A conservation group has named three fish species that it says are at risk of extinction. The fish are threatened because of overfishing to meet the worldâs growing demand for food.
What are forage fish? Forage fish are small, schooling species that eat microscopic plants and animals drifting near the ocean surface and are then consumed by bigger fish, seabirds, and marine mammals. Common forage fish are sardines, herring, and anchovies. Others, such as saury and sand lance, aren't as widely recognized but still serve a critical ecological function.