Currently, Canada tends to prioritize research funding by the conservation status of the species in question. But the most critically endangered species are the last species we would want to use in invasive experiments to understand impacts of noise on
marine mammals. Control-exposure experiments would be useful to set tolerable harm limits for military sonar, seismic surveys, and ship noise in acoustically sensitive species, but it may be unethical or non-precautionary to conduct such experiments on critically endangered species – even if those animals are being exposed to similar harm levels in the wild under uncontrolled conditions through current marine industrial activities. However, noninvasive alternatives to control-exposure experiments are possible, such as natural experiments, opportunistic observations, and experimental quieting of ocean areas but it is a policy question, rather than a scientific one, to decide whether it is preferable to have direct measurements from proxy species (i.e., those whose populations are not at risk) than indirect measurements from the species for which the information is most needed. Of course, it is a scientific task to choose suitable proxies.
Currently, Canada tends to prioritize research funding by the conservation status of the species in question. But the most critically endangered species are the last species we would want to use in invasive experiments to understand impacts of noise on marine mammals. Control-exposure experiments would be useful to set tolerable harm limits for military sonar, seismic surveys, and ship noise in acoustically sensitive species, but it may be unethical or non-precautionary to conduct such experiments on critically endangered species – even if those animals are being exposed to similar harm levels in the wild under uncontrolled conditions through current marine industrial activities. However, noninvasive alternatives to control-exposure experiments are possible, such as natural experiments, opportunistic observations, and experimental quieting of ocean areas but it is a policy question, rather than a scientific one, to decide whether it is preferable to have direct measurements from proxy species (i.e., those whose populations are not at risk) than indirect measurements from the species for which the information is most needed. Of course, it is a scientific task to choose suitable proxies.
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