Complex sentence: In 2002 there was an increase in narwhal catches by hunters in Siorapaluk that did not appear to be associated with increased effort, implying that climate change may be making the narwhal more vulnerable to harvesting.
Split into simpler sentences: In 2002 there was an increase in narwhal catches by hunters in Siorapaluk that did not appear to be associated with increased effort. Climate change therefore may be making the narwhal more vulnerable to harvesting.