In many coastal ecosystems, habitat compression is caused by seasonal combinations of hypoxia and supraoptimal temperatures. These conditions commonly induce avoidance behaviours in mobile species, resulting in the concentrated use of marginal habitats. Using 3 years of acoustic telemetry and high-resolution water quality data recorded throughout Chesapeake Bay, we measured the seasonal movements and exposure of striped bass (Morone saxatilis) to oxy-thermal habitat compression. Striped bass moved to tidal freshwaters in spring (March–May), mesohaline waters in summer (June–August) and fall (September–November), and mesohaline and polyhaline waters in winter (December–February): seasonal patterns consistent with known spawning, foraging, and overwintering migrations. Analyses of habitat selection suggest that during conditions of prevalent sub-pycnocline hypoxia (June–September), striped bass appeared to select surface waters (i.e. they may avoid bottom hypoxic waters). Striped bass detections indicated tolerance of a wide range of surface water temperatures, including those >25°C, which regional regulatory bodies stipulate are stressful for this species. Still, during summer and fall striped bass selected the lowest-available temperature and avoided water temperature >27°C, demonstrating that Chesapeake Bay striped bass can encounter habitat compressions due to the behavioural avoidance of bottom hypoxia and high temperatures.

中文翻译：

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通过声学遥测跟踪切萨皮克湾条纹鲈鱼遇到的氧热栖息地压缩

在许多沿海生态系统中，栖息地压缩是由缺氧和超最佳温度的季节性组合引起的。这些条件通常会导致移动物种的回避行为，导致边缘栖息地的集中使用。使用在整个切萨皮克湾记录的 3 年声学遥测和高分辨率水质数据，我们测量了条纹鲈鱼 (Morone saxatilis) 的季节性运动和暴露于氧热栖息地压缩的情况。条纹鲈鱼在春季（3 月至 5 月）迁移到潮汐淡水，夏季（6 月至 8 月）和秋季（9 月至 11 月）迁移到中盐和多盐水域，冬季（12 月至 2 月）迁移到中盐和多盐水域：与已知产卵的季节模式一致、觅食和越冬迁徙。对栖息地选择的分析表明，在普遍的亚重跃层缺氧条件下（6 月至 9 月），条纹鲈鱼似乎会选择地表水（即它们可能会避开底部缺氧水域）。条纹鲈鱼检测表明可以耐受广泛的地表水温度，包括大于 25°C 的温度，区域监管机构规定这些温度对该物种有压力。尽管如此，在夏季和秋季，条纹鲈鱼选择了最低可用温度并避免了水温 > 27°C，这表明切萨皮克湾条纹鲈鱼可能会由于避免底部缺氧和高温的行为而遇到栖息地压缩。条纹鲈鱼检测表明可以耐受广泛的地表水温度，包括大于 25°C 的温度，区域监管机构规定这些温度对该物种有压力。尽管如此，在夏季和秋季，条纹鲈鱼选择了最低可用温度并避免了水温 > 27°C，这表明切萨皮克湾条纹鲈鱼可能会由于避免底部缺氧和高温的行为而遇到栖息地压缩。条纹鲈鱼检测表明可以耐受广泛的地表水温度，包括大于 25°C 的温度，区域监管机构规定这些温度对该物种有压力。尽管如此，在夏季和秋季，条纹鲈鱼选择了最低可用温度并避免了水温 > 27°C，这表明切萨皮克湾条纹鲈鱼可能会由于避免底部缺氧和高温的行为而遇到栖息地压缩。