Growth trajectory influences temperature preference in fish through an effect on metabolic rate.
Growth trajectory influences temperature preference in fish through an effect on metabolic rate.
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DOI：
10.1111/1365-2656.12244
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发表时间：
2014-11
期刊：
影响因子：
--
通讯作者：
Killen SS
中科院分区：
文献类型：
--
作者：
Killen SS
大多数动物在环境中移动时都会经历温度变化。特别是对于变温动物来说，温度对栖息地的选择有很大的影响。虽然在物种层面进行了深入研究，但对影响个体偏好温度的因素知之甚少。尤其缺乏关于生理特征如何与热偏好相关的信息，以及这种关系是否受到进食历史和生长轨迹等因素影响的信息。 这项研究在普通米诺鱼 Phoxinus phoxinus 中研究了这些问题，以确定摄食史、标准代谢率 (SMR) 和有氧范围 (AS) 相互作用对温度偏好的影响程度。 个体：1) 21 天禁食 (FD)，然后在接下来的 74 天随意进食；或2)在整个期间随意进食。然后允许所有动物使用穿梭箱选择首选温度，然后在 10°C 下测量 SMR 和 AS，通过摄氧率进行估计。还测量了恒温条件下穿梭箱内的活动。 在 FD 和对照鱼中，SMR 与偏好温度呈负相关。与对照组相比，FD 鱼的 SMR 有所增加，这可能是由于补偿生长的影响，因此这些生长补偿鱼喜欢的温度比在整个研究过程中喂食维持配给的对照组平均低 2·85 °C。经历补偿性生长的鱼类也表现出活动大幅减少。在生长补偿鱼和对照组中，10°C 下测量的活性与首选温度呈正相关。 个体鱼更喜欢随 SMR 和活动水平可预测地变化的温度，这都是可塑性的，以响应摄食历史和生长轨迹。较低的温度可能使个人能够降低维护成本并将更多的精力用于生长。较低温度下 SMR 的减少，加上自发活动的减少，也可能使个体增加剩余的 AS 来应对环境压力。然而，在气候变暖的情况下，水生变温动物可能会经历食物供应的频繁波动，由于补偿性生长而对代谢率产生长期影响，同时它们进入首选较冷栖息地的机会受到限制。
Most animals experience temperature variations as they move through the environment. For ectotherms, in particular, temperature has a strong influence on habitat choice. While well studied at the species level, less is known about factors affecting the preferred temperature of individuals; especially lacking is information on how physiological traits are linked to thermal preference and whether such relationships are affected by factors such feeding history and growth trajectory. This study examined these issues in the common minnow Phoxinus phoxinus, to determine the extent to which feeding history, standard metabolic rate (SMR) and aerobic scope (AS), interact to affect temperature preference. Individuals were either: 1) food deprived (FD) for 21 days, then fed ad libitum for the next 74 days; or 2) fed ad libitum throughout the entire period. All animals were then allowed to select preferred temperatures using a shuttle-box, and then measured for SMR and AS at 10 °C, estimated by rates of oxygen uptake. Activity within the shuttle-box under a constant temperature regime was also measured. In both FD and control fish, SMR was negatively correlated with preferred temperature. The SMR of the FD fish was increased compared with the controls, probably due to the effects of compensatory growth, and so these growth-compensated fish preferred temperatures that were on average 2·85 °C cooler than controls fed a maintenance ration throughout the study. Fish experiencing compensatory growth also displayed a large reduction in activity. In growth-compensated fish and controls, activity measured at 10 °C was positively correlated with preferred temperature. Individual fish prefer temperatures that vary predictably with SMR and activity level, which are both plastic in response to feeding history and growth trajectories. Cooler temperatures probably allow individuals to reduce maintenance costs and divert more energy towards growth. A reduction in SMR at cooler temperatures, coupled with a decrease in spontaneous activity, could also allow individuals to increase surplus AS for coping with environmental stressors. In warming climates, however, aquatic ectotherms could experience frequent fluctuations in food supply with long-lasting effects on metabolic rate due to compensatory growth, while simultaneously having limited access to preferred cooler habitats.
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影响因子：
3.4
作者：
Alvarez, David;Metcalfe, Neil B.
通讯作者：
Metcalfe, Neil B.
影响因子：
2.9
作者：
BROWN, JH;MARQUET, PA;TAPER, ML
通讯作者：
TAPER, ML
影响因子：
1.6
作者：
Artacho, Paulina;Jouanneau, Isabelle;Le Galliard, Jean-Francois
通讯作者：
Le Galliard, Jean-Francois
DOI：
10.1098/rstb.2007.2099
发表时间：
2007-11-29
影响因子：
6.3
作者：
Claireaux, Guy;Lefrancois, Christel
通讯作者：
Lefrancois, Christel
影响因子：
2.5
作者：
Dingemanse, NJ;Both, C;Van Noordwijk, AJ
通讯作者：
Van Noordwijk, AJ