Editing Hibernation (section)

===Winter dormancy in fish===
While most animals that go through winter dormancy lower their metabolic rates, some fish, such as the [[cunner]], do not.<ref name="Speers-Roesch 2018">{{cite journal |last1=Speers-Roesch |first1=Ben |last2=Norin |first2=Tommy |last3=Driedzic |first3=William |title=The benefit of being still: energy savings during winter dormancy in fish come from inactivity and the cold, not from metabolic rate depression |journal=Proceedings of the Royal Society B: Biological Sciences |date=September 5, 2018 |volume=285 |issue=1886 |doi=10.1098/rspb.2018.1593 |pmid=30185640 |pmc=6158517 |ref=Speers-Roesch 2018}}</ref> Instead, they do not actively depress their base metabolic rate, but instead they simply reduce their activity level. Fish that undergo winter dormancy in oxygenated water survive via inactivity paired with the colder temperature, which decreases energy consumption, but not the base metabolic rate that their bodies consume. But the [[Notothenia coriiceps|Antarctic yellowbelly rockcod]] (''Notothenia coriiceps''), as well as fish that undergo winter dormancy in hypoxic conditions, do suppress their metabolism like other animals that are dormant in the winter.<ref name="Bickler and Buck 2007">{{cite journal |last1=Bickler |first1=Philip |last2=Buck |first2=Leslie |title=Hypoxia Tolerance in Reptiles, Amphibians, and Fishes: Life with Variable Oxygen Availability |journal=Annual Review of Physiology |date=March 17, 2007 |volume=69 |issue=1 |pages=145–170 |doi=10.1146/annurev.physiol.69.031905.162529 |pmid=17037980 |url=https://www.annualreviews.org/doi/10.1146/annurev.physiol.69.031905.162529 |ref=Bickler and Buck 2007}}</ref><ref name="Campbell et al. 2008">{{cite journal |last1=Campbell |first1=Hamish |last2=Fraser |first2=Keiron |last3=Bishop |first3=Charles |last4=Peck |first4=Lloyd |last5=Egginton |first5=Stuart |title=Hibernation in an Antarctic Fish: On Ice for Winter |journal=PLOS ONE |date=March 5, 2008 |volume=3 |issue=3 |pages=e1743 |doi=10.1371/journal.pone.0001743 |pmid=18320061 |pmc=2254195 |bibcode=2008PLoSO...3.1743C |ref=Campbell et al. 2008 |doi-access=free }}</ref> The mechanism for evolution of metabolic suppression in fish is unknown. Most fish that are dormant in the winters save enough energy by being still and so there is not a strong selective pressure to develop a metabolic suppression mechanism  like that which is necessary in hypoxic conditions.<ref name="Campbell et al. 2008" />