Difference between revisions of "ExtinctMammals"
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=== On Ecosystems === | === On Ecosystems === | ||
• World’s fisheries are not only impacting marine mammals, but the trophic structure as well – by capturing huge amounts of fish they are causing changes in energy pathways and species numbers (Merritt) | |||
o Affect marine mammals adversely | |||
• Loss of biodiversity/ decline in mammals can cause population imbalances in other species (Munday) | |||
== Connection to Coral Reefs == | == Connection to Coral Reefs == | ||
Revision as of 01:43, 1 March 2016
Extinct Marine Mammals
Past Extinctions
Causes
Effects
On Humans
• Overexploitation seems to be the main issue – loss of fish from overfishing and poor practices can destroy ways of life, jobs, industries, etc.
• Marine mammals are often caught as bycatch
• Unregulated harvest
• new and innovative solutions to this problem are required to take account of the socioeconomic conditions experienced by fishermen” (Merritt)
• Issue of regulation versus deregulation – looking at pros and cons of regulation seeing as it costs a lot, but is significant in saving a species
o Regulation = politically unpopular (Merritt)
• Poverty and the collapse of other industries can lead to abrupt changes in local fishing conditions – may start to prey on marine mammals once their value as food and bait is noticed
o Unregulated and unsustainable (Merritt)
o Peruvian dolphins; anchovy fisheries collapsed so people started hunting dolphins; led to depletion in population (Merritt)
On Ecosystems
• World’s fisheries are not only impacting marine mammals, but the trophic structure as well – by capturing huge amounts of fish they are causing changes in energy pathways and species numbers (Merritt)
o Affect marine mammals adversely
• Loss of biodiversity/ decline in mammals can cause population imbalances in other species (Munday)