Rising surface temperatures lead to more frequent and longer burrow retreats in males of the fiddler crab, Minuca pugnax
Rising surface temperatures lead to more frequent and longer burrow retreats in males of the fiddler crab, Minuca pugnax
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DOI：
10.1016/j.jtherbio.2023.103639
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发表时间：
2023-07-14
影响因子：
2.7
通讯作者：
Pradhan，Adishri
中科院分区：
文献类型：
--
作者：
Brodie，Renae;Chery，Myrha-Lissa;Pradhan，Adishri
招潮蟹Minuca pugnax占据美国东部海岸线热不稳定的泥滩栖息地，在那里它利用行为温度调节（包括洞穴撤退）来控制体温（Tb）。我们通过 20 名男性探索了洞穴使用频率与环境条件之间的关系，包括洞穴和表面温度、相对潮汐高度和一天中的时间。美国纽约州亚麻池周围的普纳辛繁殖区。我们发现洞穴使用与地表温度之间存在高度显着的正相关性，在 32°C 以上的地下时间明显延长。我们还在实验室中对活蟹进行了实验加热，让它们退回到冷却的人工洞穴中，同时连续测量 Tb。将冷却时间的实验室数据与洞穴撤退持续时间的现场观察进行比较。野外的中位洞穴持续时间为 2.74 分钟，足以让我们的实验室螃蟹捕获低于 Tb 10 或 15 °C 的人工洞穴 70% 以上的冷却潜力。由于牛顿冷却定律，洞穴中的螃蟹身体会经历指数下降，因此留在洞穴中的收益递减，许多螃蟹可能在达到平衡之前就离开了。形式。 pugnax，洞穴撤退减少了进食和求偶所花费的时间，这些活动只发生在地表。目前人们对气候变化对动物影响的担忧包括，补偿机制（例如更频繁和更长的洞穴撤退）是否会以牺牲生存和繁殖所需的其他行为为代价。
The fiddler crabMinuca pugnaxoccupies thermally unstable mudflat habitats along the eastern United States coastline, where it uses behavioral thermoregulation, including burrow retreats, to manage body temperature (Tb). We explored the relationship between frequency of burrow use and environmental conditions, including burrow and surface temperatures, relative tidal height, and time of day, by twenty maleM. pugnaxin breeding areas around Flax Pond, New York, USA. We found a highly significant positive correlation between burrow use and surface temperature, with a clear shift to longer times underground above 32 °C degrees. We also experimentally heated live crabs in the laboratory and allowed them to retreat into cooled artificial burrows while continuously measuring Tb. Laboratory data on cooling times were compared to field observations of burrow retreat durations. The median burrow duration in the field of 2.74 min was enough time for our laboratory crabs to capture over 70% of the cooling potential of artificial burrows 10 or 15 °C below Tb. Because crab bodies in burrows experience exponential declines in Tbdue to Newton's law of cooling, there are diminishing returns to remaining in a burrow, and many crabs probably leave before coming to equilibrium. ForM. pugnax, burrow retreats reduce time spent feeding and courting, activities that only occur on the surface. Current concerns about the impacts of climate change on animals include whether compensatory mechanisms, like more frequent and longer burrow retreats, will come at the cost of other behaviors necessary for survival and reproduction.