Department of Marine Biology, Texas A&M University at Galveston, 200 Seawolf Parkway Ocean and Coastal Sciences Building, Galveston, TX 77553, USA.
J Fish Biol. 2013 May;82(5):1469-83. doi: 10.1111/jfb.12074. Epub 2013 Mar 26.
Habitat use of juvenile southern flounder Paralichthys lethostigma was examined within a shallow estuarine seascape during June and July 2011 using acoustic telemetry. Fine-scale movement and habitat use of P. lethostigma was investigated with an acoustic positioning system placed in a seascape that varied in habitat type, physicochemical conditions and bathymetry. The use of different habitat types was examined with Euclidean distance-based analyses, and generalized additive models were used to determine the relative importance of habitat type relative to physicochemical conditions and bathymetry. Tracks of P. lethostigma ranged in distance between 1477 and 8582 m and speed was 4·2 ± 1·1 m min⁻¹ (mean ± s.e.) for all P. lethostigma combined. Depth, slope and habitat type had the most influence on P. lethostigma occurrence and deep sandy areas with shallow slopes were used most frequently. In addition, depth use by P. lethostigma was influenced by tidal cycles, indicating habitat use varies temporally and is dynamic. Finally, temperatures <30·5° C were used more than warmer waters within the study area. The results successfully identify movements by juvenile P. lethostigma, and indicate that definitions of essential habitats need to account for dynamics in habitat use.
2011 年 6 月至 7 月，使用声学遥测技术在一个浅海河口景观中研究了幼年南方比目鱼 Paralichthys lethostigma 的栖息地利用情况。利用声学定位系统在一个生境类型、理化条件和水深变化的景观中研究了 P. lethostigma 的精细运动和栖息地利用情况。使用欧几里得距离基分析检查了不同生境类型的使用情况，并使用广义加性模型确定了生境类型相对于理化条件和水深的相对重要性。P. lethostigma 的轨迹距离在 1477 和 8582 m 之间，所有 P. lethostigma 的平均速度为 4.2±1.1 m min⁻¹（平均值±s.e.）。深度、坡度和生境类型对 P. lethostigma 的出现影响最大，浅坡度的深沙区使用最频繁。此外，P. lethostigma 的深度利用受潮汐周期的影响，表明栖息地利用随时间变化且具有动态性。最后，研究区域内，温度<30.5°C 的水域比温暖水域使用得更多。研究结果成功地确定了幼年 P. lethostigma 的运动情况，并表明基本栖息地的定义需要考虑到栖息地利用的动态变化。
