What threatens bull sharks?

Answer 1

Other (larger) sharks, and mostly sumans, the most destructive and selfish species to have ever existed. We fish them, fish their food, pollute their (and their prey species) water and cause physical damage to their habitats

Answer 2

Bull Sharks are apex predators. In their natural habitat, they have very few natural predators. Very few marine animals are large enough to actually hunt or kill a full grown bull shark. However, humans are the biggest enemies for these sharks. They have been hunted and killed indiscrimenately by humans for decades.

Answer 3

Archaeology is concerned with the origins and development of early human culture between the first appearance of man as a tool-using mammal, which is believed to have occurred about 600,000 or 700,000 years ago, and the beginning of the Recent geologic era, about 8000 BC. It is included in the time span of the Pleistocene, or Glacial, Epoch--an interval of about 1,000,000 years. Although it cannot be proved, modern evidence suggests that the earliest protohuman forms had diverged from the ancestral primate stock by the beginning of the Pleistocene. In any case, the oldest recognizable tools are found in horizons of Lower Pleistocene Age. During the Pleistocene a series of momentous climatic events occurred. The northern latitudes and mountainous areas were subjected on four successive occasions to the advances and retreats of ice sheets (known as Günz, Mindel, Riss, and Würm in the Alps), river valleys and terraces were formed, the present coastlines were established, and great changes were induced in the fauna and flora of the globe. In large measure, the development of culture during Paleolithic times seems to have been profoundly influenced by the environmental factors that characterize the successive stages of the Pleistocene Epoch.

Throughout the Paleolithic, man was a food gatherer, depending for his subsistence on hunting wild animals and birds, fishing, and collecting wild fruits, nuts, and berries. The artifactual record of this exceedingly long interval is very incomplete; it can be studied from such imperishable objects of now-extinct cultures as were made of flint, stone, bone, and antler. These alone have withstood the ravages of time, and, together with the remains of contemporary animals hunted by our prehistoric forerunners, they are all that scholars have to guide them in attempting to reconstruct human activity throughout this vast interval--approximately 98 percent of the time span since the appearance of the first true hominid stock. In general, these materials develop gradually from single, all-purpose tools to an assemblage of varied and highly specialized types of artifacts, each designed to serve in connection with a specific function. Indeed, it is a process of increasingly more complex technologies, each founded on a specific tradition, which characterizes the cultural development of Paleolithic times. In other words, the trend was from simple to complex, from a stage of non-specialization to stages of relatively high degrees of specialization, just as has been the case during historic times.

Answer 4

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