farming techniques Flashcards
how can the efficiency of food production be increased?
-by restricting energy transfer from food animals to the environment
-this can be done by limiting their movement
-by controlling the temperature of their surroundings
how does this make farming more efficient?
-animals use less energy moving around and controlling their body temperature
-so more energy is available for growth, so more food can be produced from the same input of resources
what are some animals fed to increase growth?
high-protein foods
what is factory farming?
where livestock are raised in small pens
negatives of factory farming
-disease can spread easily as kept close together
-ethical objections as the conditions are unnatural and uncomfortable
what is happening to fish stocks and why?
they are declining because we’re fishing too much
consequence of declining fish stocks
-fewer fish for us to eat
-ocean’s food chains are affected
-some species of fish may disappear in some areas
why is it important to maintain fish stocks?
certain species may disappear altogether in some areas
what can we do to tackle declining fish stocks?
maintain fish stocks at a level where the fish continue to breed
two ways that fish stocks can be maintained
-fishing quotas
-net size
fishing quotas
-limits on the number and size of fish that can be caught in certain areas
-prevents certain species from being overfished
net size
-limits on the mesh size of the fish net
-to reduce the number of unwanted and discarded fish
-using a bigger mesh size will let the unwanted species escape
-means younger fish will slip through the net, allowing them to reach breeding age
