FN Archimer Export Format
PT J
TI Reflex cardioventilatory responses to hypoxia in the flathead gray mullet (Mugil cephalus) and their behavioral modulation by perceived threat of predation and water turbidity
BT 
AF SHINGLES, A
   MCKENZIE, David
   CLAIREAUX, Guy
   DOMENICI, P
AS 1:1;2:2,4;3:2,4;4:3;
FF 1:;2:;3:;4:;
C1 Int Marine Ctr, I-09072 Torregrande, Or, Italy.
   IFREMER, CNRS, Ctr Rech Ecosyst Marins & Aquacoles, F-17137 Lhoumeau, France.
   CNR, Ist Ambiente Marino & Costiero, I-09072 Torregrande, Or, Italy.
C2 INT MARINE CTR, ITALY
   IFREMER, FRANCE
   CNR, ITALY
   CNRS, FRANCE
SI LA ROCHELLE
SE PDG-DOP-DCN-AGSAE-CREMA
IN WOS Ifremer jusqu'en 2018
   copubli-france
   copubli-europe
IF 2.145
TC 71
UR https://archimer.ifremer.fr/doc/2005/publication-637.pdf
LA English
DT Article
DE ;Oxygen;Channel Catfish;Neotropical Fish;Cardiorespiratory Reflexes;Air Breathing Fish;Tambaqui Colossoma Macropomum;Salmon Oncorhynchus Tshawytscha;Aquatic Surface Respiration
AB In hypoxia, gray mullet surface to ventilate well-oxygenated water in contact with air, an adaptive response known as aquatic surface respiration (ASR). Reflex control of ASR and its behavioral modulation by perceived threat of aerial predation and turbid water were studied on mullet in a partly sheltered aquarium with free surface access. Injections of sodium cyanide (NaCN) into either the bloodstream ( internal) or ventilatory water stream ( external) revealed that ASR, hypoxic bradycardia, and branchial hyperventilation were stimulated by chemoreceptors sensitive to both systemic and water O-2 levels. Sight of a model avian predator elicited bradycardia and hypoventilation, a fear response that inhibited reflex hyperventilation following external NaCN. The time lag to initiation of ASR following NaCN increased, but response intensity ( number of events, time at the surface) was unchanged. Mullet, however, modified their behavior to surface under shelter or near the aquarium edges. Turbid water abolished the fear response and effects of the predator on gill ventilation and timing of ASR following external NaCN, presumably because of reduced visibility. However, in turbidity, mullet consistently performed ASR under shelter or near the aquarium edges. These adaptive modulations of ASR behavior would allow mullet to retain advantages of the chemoreflex when threatened by avian predators or when unable to perceive potential threats in turbidity.
PY 2005
PD SEP
SO Physiological and Biochemical Zoology
SN 1522-2152
PU University of Chicago Press
VL 78
IS 5
UT 000231502300008
BP 744
EP 755
DI 10.1086/432143
ID 637
ER

EF