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Answer :
The most accurate statement among the options provided is: b) The transient population is less likely to be affected by whale watching vessels.
a) Contaminants: Both resident and transient populations are likely to be affected by contaminants, as these can accumulate in marine environments and bioaccumulate through the food chain. This threat would not necessarily be higher for transient populations.
b) Whale watching vessels: Transient whales live farther offshore and in more open waters compared to resident populations that often inhabit nearshore areas where whale watching activities are concentrated. Thus, transient populations are less likely to encounter recreational and whale watching vessels frequently.
c) Disease: The likelihood of disease affecting whale populations is not directly related to their offshore or nearshore habitats. Therefore, there is no clear reason to believe that transient populations are more likely to be affected by disease.
d) Prey availability: While prey availability is a critical factor for all whale populations, transient populations that roam larger areas might have more flexibility in finding alternative prey compared to resident populations that rely on specific prey species (like salmon for southern resident orcas). However, this does not necessarily mean they are less affected by prey availability overall; it just might manifest differently.
In conclusion, transient whale populations are less likely to be affected by whale watching vessels due to their offshore habitats and larger roaming areas.
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Rewritten by : Jeany
Transient populations have the distinct advantage of being able to move between different places, and thus are less effected by detrimental local conditions.
The most likely scenario is represented by statement b). Due to the fact that there are more individuals per average in a population and the fact that they live farther offshore, the effect of whale watching vessels on the whole population is most likely to be low.
Due to the fact that the population does not live in the same place for extended periods of time, it is less likely to be affected by local contaminants, prey availability as well as disease caused by local conditions.
