Difference between revisions of "ExtinctMammals"

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(On Humans)
(On Ecosystems)
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=== On Ecosystems ===
 
=== On Ecosystems ===
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• 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)
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o Affect marine mammals adversely
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• 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)

Connection to Coral Reefs

Prevention