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首页> 外文期刊>The Open Fish Science Journal >Microhabitat Use and Vertical Habitat Partitioning of Juvenile Atlantic(Gadus morhua) and Greenland (Gadus ogac) Cod in Coastal Newfoundland
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Microhabitat Use and Vertical Habitat Partitioning of Juvenile Atlantic(Gadus morhua) and Greenland (Gadus ogac) Cod in Coastal Newfoundland

机译：纽芬兰沿海少年大西洋鳕（Gadus morhua）和格陵兰鳕（Gadus ogac）的微生境利用和垂直生境划分

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Twenty co-occurring juvenile gadids (10 Gadus ogac and 10 Gadus morhua) were surgically implanted withultrasonic transmitters with depth sensors and continuously monitored for up to 23 days in the summers of 2009 and 2010to test fine-scale habitat use and vertical distribution overlap in coastal Newfoundland (>18700 positional fixes). A habitatmap with 8 substrate and 3 slope classes (low (<5?°), moderate (5-10?°), and high (>10?°)) was generated from acoustic dataand coincident video data using seabed mapping software (QTC). Fish locations were integrated with a habitat map to assessand quantify habitat preference. Both species avoided fine gravel/sand substrates with little vegetation and selectedfor large particle (cobble and boulder) substrates with moderate or dense vegetation, and spent the majority of time in< 10 m of water. Nevertheless, species differences in habitat use were evident. G. ogac typically remained in close proximityto the seafloor whereas G. morhua was often distributed more pelagically and showed greater variation in verticaldistribution. Habitat use and vertical distribution patterns were consistent across the diel period. Our results suggest thatdespite high overlap in habitat use, G. morhua and G. ogac often segregate vertically in the water column, which may reducecompetitive interference. We suggest that these patterns are related to differences in diet.
机译：在2009年和2010年夏季，用深度传感器通过超声波发射器通过外科植入了20个共生幼体（10个加杜斯巨猿和10个加杜斯morhua），并连续监测长达23天，以测试沿海地区的精细生境利用和垂直分布重叠纽芬兰（> 18700位置修复）。使用海床制图软件（QTC）从声学数据和重合的视频数据生成了具有8个基质和3个坡度类别（低（<5？°），中度（5-10°）和高（> 10°））的栖息地图。 ）。鱼的位置与栖息地地图整合在一起，以评估和量化栖息地的偏好。两种物种都避免了植被少的细砾石/砂质基质，而选择了植被中等或密集的大颗粒（卵石和巨石）基质，并且大部分时间都在<10 m的水中。尽管如此，生境使用中的物种差异还是很明显的。 og。ogac通常保持在紧邻海底的位置，而mor。hua。hua。的分布通常是浮游的，并且在垂直方向上表现出更大的变化。在整个diel时期，栖息地的使用和垂直分布模式是一致的。我们的研究结果表明，尽管栖息地使用存在高度重叠，但G. morhua和G. ogac经常在水柱中垂直隔离，这可能会减少竞争干扰。我们建议这些模式与饮食差异有关。

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