منابع مشابه
Ecosystem Overfishing in the Ocean
Fisheries catches represent a net export of mass and energy that can no longer be used by trophic levels higher than those fished. Thus, exploitation implies a depletion of secondary production of higher trophic levels (here the production of mass and energy by herbivores and carnivores in the ecosystem) due to the removal of prey. The depletion of secondary production due to the export of biom...
متن کاملBiological Overfishing of Tropical Stocks
NEXT PAGE t:> the fishery. These parents must mature, spawn, and fertilize eggs which hatch to larvae, only a very small fraction of whIch eventually survive and become fully formed young fish (recruits). Generally the females of most fish species produce several thousands of eggs, sometimes even several millions as in the case of some commercially exploited species in temperate waters. To a ce...
متن کاملThe overfishing debate: an eco-evolutionary perspective.
Figure 1. Substantial declines in body size have occurred in the heavily exploited stocks of Atlantic cod, Gadus morhua, off Newfoundland and Labrador, Canada. The photograph shows the size of cod harvested from these waters at the turn of the last century [10]. According to the plate, ‘The larger fish measured 5 foot 5 inches (165.2 cm) and weighed 60 pounds (27.22 kg).’ By contrast, average s...
متن کاملCriminal Law: Federal Criminal Code Section
SECTION 1001 of the Criminal Code provides criminal sanctions against persons who deal fraudulently with government agencies.1 Although the origin of the statute dates from 1863,2 only recently have Government attorneys made frequent use of its provisions. In United States v. Diogo, the Court of Appeals for the Second Circuit supplemented the increasing body of judicial interpretation of sectio...
متن کاملOverfishing causes frequent fish population collapses but rare extinctions.
Burgess et al.’s report in PNAS, “Range contraction enables harvesting to extinction” (1), provides a highly valuable perspective on the consequences of species range contractions that maintain local densities of declining populations. The authors suggest that this densitydependent contraction maintains local harvesting yields and economic incentives that enable depleted natural populations of ...
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ژورنال
عنوان ژورنال: Crimen
سال: 2020
ISSN: 2217-219X,2683-5800
DOI: 10.5937/crimen2003299u