Cardiac plasticity influences aerobic performance and thermal tolerance in a tropical, freshwater fish at elevated temperatures

被引:29
作者
Nyboer, Elizabeth A. [1 ]
Chapman, Lauren J. [1 ]
机构
[1] McGill Univ, Dept Biol, Off N3-11,Stewart Biol Bldg, Montreal, PQ H3A 1B1, Canada
基金
加拿大自然科学与工程研究理事会;
关键词
Climate change; Thermal plasticity; Nile perch; Tropical fisheries; Heart remodeling; Acclimation capacity; CLIMATE-CHANGE; METABOLIC-RATE; NILE PERCH; PHENOTYPIC PLASTICITY; HYPOXIA TOLERANCE; WARM ACCLIMATION; SEA BASS; OXYGEN; SCOPE; ENVIRONMENT;
D O I
10.1242/jeb.178087
中图分类号
Q [生物科学];
学科分类号
07 ; 0710 ; 09 ;
摘要
Fishes faced with novel thermal conditions often modify physiological functioning to compensate for elevated temperatures. This physiological plasticity (thermal acclimation) has been shown to improve metabolic performance and extend thermal limits in many species. Adjustments in cardiorespiratory function are often invoked as mechanisms underlying thermal plasticity because limitations in oxygen supply have been predicted to define thermal optima in fishes; however, few studies have explicitly linked cardiorespiratory plasticity to metabolic compensation. Here, we quantified thermal acclimation capacity in the commercially harvested Nile perch (Lates niloticus) of East Africa, and investigated mechanisms underlying observed changes. We reared juvenile Nile perch for 3 months under two temperature regimes, and then measured a series of metabolic traits (e.g. aerobic scope) and critical thermal maximum (CTmax) upon acute exposure to a range of experimental temperatures. We also measured morphological traits of heart ventricles, gills and brains to identify potential mechanisms for compensation. We found that long-term (3 month) exposure to elevated temperature induced compensation in upper thermal tolerance (CTmax) and metabolic performance (standard and maximum metabolic rate, and aerobic scope), and induced cardiac remodeling in Nile perch. Furthermore, variation in heart morphology influenced variations in metabolic function and thermal tolerance. These results indicate that plastic changes enacted over longer exposures lead to differences in metabolic flexibility when organisms are acutely exposed to temperature variation. Furthermore, we established functional links between cardiac plasticity, metabolic performance and thermal tolerance, providing evidence that plasticity in cardiac capacity may be one mechanism for coping with climate change.
引用
收藏
页数:14
相关论文
共 80 条
[1]  
Angilletta MJ, 2009, BIO HABIT, P1, DOI 10.1093/acprof:oso/9780198570875.001.1
[2]   Association between swimming performance, cardiorespiratory morphometry, and thermal tolerance in Atlantic salmon (Salmo salar L.) [J].
Anttila, Katja ;
Jorgensen, Sven Martin ;
Casselman, Matthew T. ;
Timmerhaus, Gerrit ;
Farrell, Anthony P. ;
Takle, Harald .
FRONTIERS IN MARINE SCIENCE, 2014, 1
[3]   Warm acclimation and oxygen depletion induce species-specific responses in salmonids [J].
Anttila, Katja ;
Lewis, Mario ;
Prokkola, Jenni M. ;
Kanerva, Mirella ;
Seppanen, Eila ;
Kolari, Irma ;
Nikinmaa, Mikko .
JOURNAL OF EXPERIMENTAL BIOLOGY, 2015, 218 (10) :1471-1477
[4]   Variation in temperature tolerance among families of Atlantic salmon (Salmo salar) is associated with hypoxia tolerance, ventricle size and myoglobin level [J].
Anttila, Katja ;
Dhillon, Rashpal S. ;
Boulding, Elizabeth G. ;
Farrell, Anthony P. ;
Glebe, Brian D. ;
Elliott, Jake A. K. ;
Wolters, William R. ;
Schulte, Patricia M. .
JOURNAL OF EXPERIMENTAL BIOLOGY, 2013, 216 (07) :1183-1190
[5]   Temperature tolerances of North American freshwater fishes exposed to dynamic changes in temperature [J].
Beitinger, TL ;
Bennett, WA ;
McCauley, RW .
ENVIRONMENTAL BIOLOGY OF FISHES, 2000, 58 (03) :237-275
[6]   Do consistent individual differences in metabolic rate promote consistent individual differences in behavior? [J].
Biro, Peter A. ;
Stamps, Judy A. .
TRENDS IN ECOLOGY & EVOLUTION, 2010, 25 (11) :653-659
[7]  
Brett JR., 1979, Fish Physiology, DOI 10.1016/S1546-5098(08)60029-1
[8]   Experimental manipulations of tissue oxygen supply do not affect warming tolerance of European perch [J].
Brijs, Jeroen ;
Jutfelt, Fredrik ;
Clark, Timothy D. ;
Grans, Albin ;
Ekstrom, Andreas ;
Sandblom, Erik .
JOURNAL OF EXPERIMENTAL BIOLOGY, 2015, 218 (15) :2448-2454
[9]  
Brown JH, 2004, ECOLOGY, V85, P1771, DOI 10.1890/03-9000
[10]   The measurement of specific dynamic action in fishes [J].
Chabot, D. ;
Koenker, R. ;
Farrell, A. P. .
JOURNAL OF FISH BIOLOGY, 2016, 88 (01) :152-172