Acute warming elicits pectoral fin fanning in Hb- C . aceratus and Hb+ N . coriiceps .

• Main Authors: Iskander I. Ismailov (11751816), Jordan B. Scharping (11751819), Iraida E. Andreeva (11751822), Michael J. Friedlander (11751825)
• Format: Still Image
• Language: unknown
• Published: 2021
• Subjects: Genetics; Physiology; Evolutionary Biology; Ecology; Sociology; Inorganic Chemistry; Environmental Sciences not elsewhere classified; Biological Sciences not elsewhere classified; unavoidable progressive hyperthermia; recent studies forecast; notothenia coriiceps </; increasing metabolic demand; include avoidance reactions; essential thermoregulatory mechanism; especially aquatic stenotherms; ecologically relevant setting; chaenocephalus aceratus </; call much attention; augment gill ventilation; many ectothermic animals; >) lacks hemoglobin; div >< p; acute ambient warming; limited thermal range; ambient warming; thermal stress; many ectotherms; expresses hemoglobin; thus facilitating; temperature continues; specific maneuvers; specific locomotor; scaleless integument; respiratory responses; repetitive startle; obligatory thermoconformation; manifests respiratory; locomotor coupling; like maneuvers; less tolerant; habitat selection; detrimental effects; deleterious effects; branchial respiration; antarctic teleosts; Antarctic; Fanning; Antarc*
• Online Access: https://doi.org/10.1371/journal.pone.0252359.g006

(A) Top panel depicts lateral (upper images) and ventral (lower images) view of one complete cycle (800 ms in duration, every 6th frame shown) of undulatory fanning, typical for C . aceratus . Bottom panel depicts ventral view of one cycle of “sway” (fins adducted and abducted in a counterphase) fanning 1.6 s in duration (left set of images, every 24th frame is shown) and one cycle of “sweep” (fins adducted and abducted in a synphase) fanning 1.4 seconds in duration (right set of images, every 21st frame is shown), characteristic for N . coriiceps . (B) Temperature plots of duration of fanning bouts (episodes of uninterrupted continuous fanning at near constant frequency). (C) Temperature plots of fanning frequency (number of fin beats per second within a bout). For conventions of quantification and presentation of grouped data as a function of temperature, see Materials and Methods. Different symbols in (B) and (C) represent three specimens of each species.