Citation:

PANGAEA.889161

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Abstract:

Two groups (n = 8, n = 5) of Polar cod (Boreogadus saida) were acclimated to both 0 and 6°C. The smaller groups were used to investigate specific dynamic action (SDA) (treatment "digestion"). Each fish of the larger groups was used for exercise tests in an unfed and fed state (treatment "exercise" and "exercise & digestion", respectively) at their respective acclimation temperatures as well as in a fed state acutely exposed to an intermediate temperature (3°C). SDA measurements lasted for 18 and 9 days at 0 and 6°C, identical to the food-deprivation period of B. saida in the exercise approach. Feeding was conducted in the common tank. Accordingly, daily rations reflect the mean food consumption per treatment. Each fish was allowed to feed for at least 2h before the start of the experiments.

The acclimation time refers to the first day of the respective experiment.

The SDA response is characterized by the maximum metabolic rate (MMR) evoked by digestion (defined as second record of oxygen consumption ṀO₂) and terminated by the standard metabolic rate (SMR) (20% quantile among ṀO₂ values obtained on the 18th day at 0°C and the 9th day at 6°C, respectively). Subsequently, the individual duration and the magnitude of the postprandial response (integral below the curve generated by aid of a specific script within the program R (R Core Team 2013)) was calculated.

Fish used during exercise treatments were weaned to a Brett-type swimming tunnel for exactly two hours, before the onset of the exercise protocol. The exercise protocol involved a settling period of 5 min at a baseline swimming velocity, before the speed was carefully increased by 1.4 cm/s once per minute. Like this, the transition speed to partly anaerobic swimming (Ugait), as well as the critical swimming speed (Ucrit) was determined for every specimen. At each velocity step, burst-type swimming behavior was counted for 50 sec. The maximum burst count (max. BC) was used to estimate anaerobic capacities. As soon as Ucrit was reached, fish were placed in a separate respiration setup for the determination of MMR evoked by exercise and the MMR evoked by concomitant exercise and digestion (first ṀO₂ record after placement in respiration chamber) for 48 h. The respective SMR of unfed fish were calculated as 20% quantiles among all ṀO₂ records after 24 h. The difference between MMR and SMR values of exercised and postprandial fish represent the individual aerobic scopes (AS). The ṀO₂ at Ucrit (MMR) was used to calculate the energetic efficiency of maximum swimming performance (Emax).

Related to:

Kunz, Kristina Lore; Claireaux, Guy; Pörtner, Hans-Otto; Knust, Rainer; Mark, Felix Christopher (2018): Aerobic capacities and swimming performance of polar cod (Boreogadus saida) under ocean acidification and warming conditions. Journal of Experimental Biology, 221(21), jeb184473, https://doi.org/10.1242/jeb.184473

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Comment
1	Experimental treatment	Exp treat		Kunz, Kristina Lore
2	Temperature, water	Temp	°C	Kunz, Kristina Lore	acclimation
3	Temperature, water	Temp	°C	Kunz, Kristina Lore	experiment
4	Time in days	Time	days	Kunz, Kristina Lore	acclimation
5	Wet mass	Wet m	g	Kunz, Kristina Lore
6	Length, total	TL	mm	Kunz, Kristina Lore
7	Ratio, food consumption per treatment	Ratio food cons	arbitrary units	Kunz, Kristina Lore	as percent per body weight per day
8	Metabolic rate of oxygen, standard	SMR O2	µmol/min/g	Kunz, Kristina Lore	SMR
9	Metabolic rate of oxygen, maximum	MMR O2	µmol/min/g	Kunz, Kristina Lore	MMR
10	Aerobic scope, oxygen	AS	µmol/min/g	Kunz, Kristina Lore
11	Speed, swimming, gait transition	Ugait	arbitrary units	Kunz, Kristina Lore	as body length per second
12	Speed, swimming, critical	Ucrit	arbitrary units	Kunz, Kristina Lore	as body length per second
13	Swimming efficiency, maximum	Emax	arbitrary units	Kunz, Kristina Lore	Efficiency at maximum swimming speed, as (body length * g)/µmol
14	Burst counts, maximum	Burst counts max	#	Kunz, Kristina Lore
15	Specific dynamic action, duration	SDA duration	h	Kunz, Kristina Lore
16	Specific dynamic action, oxygen, magnitude	SDA O2 mag	µmol/g	Kunz, Kristina Lore

License:

Creative Commons Attribution 3.0 Unported (CC-BY-3.0)

Size:

627 data points

Data

Download dataset as tab-delimited text — use the following character encoding:

1 Exp treat	2 Temp [°C] (acclimation)	3 Temp [°C] (experiment)	4 Time [days] (acclimation)	5 Wet m [g]	6 TL [mm]	7 Ratio food cons [arbitrary units] (as percent per body weight pe...)	8 SMR O2 [µmol/min/g] (SMR)	9 MMR O2 [µmol/min/g] (MMR)	10 AS [µmol/min/g]	11 Ugait [arbitrary units] (as body length per second)	12 Ucrit [arbitrary units] (as body length per second)	13 Emax [arbitrary units] (Efficiency at maximum swimmin...)	14 Burst counts max [#]	15 SDA duration [h]	16 SDA O2 mag [µmol/g]
digestion	0	0	107	12.600	117	3.4	0.025	0.070	0.044					254.25	296.267
digestion	0	0	107	10.700	114	3.4	0.051
digestion	0	0	107	14.800	128	3.4	0.029	0.046	0.017					151.75	83.764
digestion	0	0	107	9.700	115	3.4	0.022	0.057	0.035					143.00	117.246
digestion	0	0	107	10.900	114	3.4	0.026	0.045	0.019					117.00	87.379
digestion	6	6	13	11.190	121	4.4	0.053
digestion	6	6	13	7.140	101	4.4	0.075	0.121	0.047					197.50	267.929
digestion	6	6	13	5.395	98	4.4	0.013
digestion	6	6	13	7.705	106	4.4	0.041	0.079	0.038					157.75	166.450
digestion	6	6	13	10.930	117	4.4	0.061	0.103	0.043					50.50	73.048
exercise	0	0	71	14.800	134		0.038	0.081	0.042	3.4	3.7	2733.51	32
exercise	0	0	71	10.000	120		0.046	0.082	0.036	3.4	3.7	2669.50	14
exercise	0	0	72	12.400	130		0.039
exercise	0	0	72	12.300	127		0.041	0.102	0.061	3.1	3.5	2042.52	17
exercise	0	0	73	10.200	116		0.029
exercise	0	0	74	16.700	133		0.047
exercise	0	0	74	20.100	146		0.035	0.092	0.057			1893.85	00
exercise	6	6	81	14.300	131		0.047	0.122	0.075	3.5	3.8	1876.95	20
exercise	6	6	81	9.900	127		0.021	0.087	0.066	3.2	3.2	2216.48	04
exercise	6	6	82	11.300	122		0.038	0.087	0.048	3.5	4.0	2781.32	28
exercise	6	6	82	13.000	127		0.067	0.109	0.042	3.6	3.8	2080.90	09
exercise	6	6	83	12.600	127		0.048	0.116	0.068	3.4	3.9	2001.53	11
exercise	6	6	83	16.100	135		0.050	0.124	0.074	3.6	3.7	1808.92	15
exercise	6	6	84	12.200	127		0.045	0.117	0.072	3.3	3.5	1804.22	08
exercise	6	6	84	15.600	141		0.048	0.149	0.101	3.3	3.7	1494.05	25
exercise & digestion	0	0	88	16.400	136	2.6		0.092		3.5	3.6	2334.61	47
exercise & digestion	0	0	88	13.100	118	2.6		0.077		3.2	3.5	2696.04	10
exercise & digestion	0	0	89	23.400	146	2.6		0.094		2.9	3.0	1936.42	15
exercise & digestion	0	0	90	16.200	128	2.6		0.084		3.1	3.5	2513.66	23
exercise & digestion	0	0	90	15.200	133	2.6		0.090		3.0	3.5	2311.53	28
exercise & digestion	0	0	91	11.800	124	2.6		0.075		3.2	3.5	2795.90	19
exercise & digestion	0	0	91	18.700	136	2.6
exercise & digestion	6	6	45	16.200	135	4.2		0.138		3.8	4.2	1843.30	34
exercise & digestion	6	6	45	12.500	124	4.2		0.144		3.6	3.9	1636.94	14
exercise & digestion	6	6	46	12.900	122	4.2		0.132		3.9	4.3	1930.62	36
exercise & digestion	6	6	46	10.900	124	4.2		0.132		3.8	4.0	1800.44	17
exercise & digestion	6	6	47	14.800	128	4.2		0.148		3.8	4.3	1727.47	20
exercise & digestion	6	6	47	10.800	118	4.2		0.129		3.9	4.5	2117.33	36
exercise & digestion	6	6	48	12.800	122	4.2		0.112				2608.09
exercise & digestion	6	6	48	16.500	130	4.2		0.138		3.7	4.0	1722.06	18
exercise & digestion	0	3	103	14.300	120	2.6		0.082		3.5	3.8	2753.47	14
exercise & digestion	0	3	103	16.700	132	2.6		0.130		4.0	4.2	1926.44	56
exercise & digestion	0	3	104	13.300	124	2.6		0.112		3.7	4.0	2147.37	34
exercise & digestion	0	3	104	15.800	135	2.6		0.117		3.3	3.5	1791.32	25
exercise & digestion	0	3	105	23.000	148	2.6		0.126		3.3	3.4	1639.00	30
exercise & digestion	0	3	105	16.700	137	2.6		0.120		3.6	3.8	1880.57	45
exercise & digestion	0	3				2.6
exercise & digestion	6	3	98	14.100	127	4.3		0.113		3.4	3.7	1958.88	28
exercise & digestion	6	3	98	15.700	127	4.3		0.073		3.7	4.0	3323.65	26
exercise & digestion	6	3	99	15.400	130	4.3		0.110		3.8	3.8	2093.08	28
exercise & digestion	6	3	100	21.500	145	4.3		0.094		3.6	3.7	2361.25	40
exercise & digestion	6	3	101	15.400	127	4.3		0.089		3.4	3.9	2626.51	31
exercise & digestion	6	3	101	20.800	136	4.3		0.119		3.1	3.4	1706.38	14
exercise & digestion	6	3	102	18.100	131	4.3		0.107		3.8	3.9	2195.20	27
exercise & digestion	6	3	102	11.900	127	4.3		0.089		3.1	3.3	2211.34	11