Gas bubble disease in resident fish below Grand Coulee Dam
Gas bubble disease in resident fish below Grand Coulee Dam
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发表时间：
2001
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影响因子：
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通讯作者：
D. Venditti;T. C. Robinson;J. Beeman;A. Maule
中科院分区：
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作者：
D. Venditti;T. C. Robinson;J. Beeman;A. Maule
记录压力的存档标签（即，在1999年、2000年和2001年期间，在大库利大坝下游的水库内，将温度和深度植入成鱼体内，以确定它们对总溶解气体过饱和（TDGS）（气泡病的病原体）的相对暴露。在商品渔场网栏中饲养的三倍体虹鳟（Oncorhynchus mykiss; STH）和野生的哥伦比亚口吸口鱼（Catostomus columbianus; BLS）、大鳞口吸口鱼（C. macrocheilus; LSS）、长鼻吸盘（C.下口鱼属; LNS），北方pikeminnow（Ptycocheilus oregonensis; NPM）和walleye（Stizostedion vitreum; WAL）从水库植入标签编程记录压力和温度，每15分钟。标签从7网围栏鱼和17野生鱼从16至156天的数据收集后恢复。数据表明，在日出和日落附近的所有鱼类的深度突然变化。大多数鱼在夜间比白天更深，但长鼻吸盘和一些海象在夜间最浅。各鱼种的中位深度依次为STH（1.6 m）、NPM（2.0 m）、BLS（2.8 m）、WAL（3.7 m）、LNS（5.2 m）和LSS（6.8 m）。在研究期间的TDGS低于已知的水平，导致气泡病的居民鱼，所以相对暴露于TDGS进行了评估，通过比较时间和距离浅，深于静水补偿深度在假设的TDGS的130%。流体静力学补偿深度是流体静力学压力等于总气体压力的深度，并且在该深度以下气泡病通常不会发生。相对暴露量按严重程度由高到低依次为LNS、LSS、WAL、BLS、NPM和STH。根据这些结果，预计网围栏中的STH会在测试的几个常驻物种之前显示出气泡病的体征和死亡率，但也应考虑对TDGS的物种特异性耐受性。
Archive tags recording pressure (i.e., depth) and temperature were implanted in adult fish within the reservoir downstream from Grand Coulee Dam during 1999, 2000 and 2001 to determine their relative exposures to total dissolved gas supersaturation (TDGS), the causative agent of gas bubble disease. Triploid steelhead (Oncorhynchus mykiss; STH) reared in net pens at a commercial fish farm and wild bridgelip sucker (Catostomus columbianus; BLS), largescale sucker (C. macrocheilus; LSS), longnose sucker (C. catostomus; LNS), northern pikeminnow (Ptycocheilus oregonensis; NPM) and walleye (Stizostedion vitreum; WAL) from the reservoir were implanted with tags programmed to record pressure and temperature every 15 min. Tags from 7 net pen fish and 17 wild fish were recovered after data collection ranging from 16 to 156 d. The data indicated abrupt changes in depths of all fish near sunrise and sunset. Most fish were deeper during the night than in the day, but the longnose suckers and some walleye were shallowest during the night. The median depths of each species, in ascending order, were STH (1.6 m), NPM (2.0 m), BLS (2.8 m), WAL (3.7 m), LNS (5.2 m) and LSS (6.8 m). The TDGS during the study period was less than levels known to cause gas bubble disease in resident fish, so the relative exposure to TDGS was evaluated by comparing the time and distance shallower and deeper than the hydrostatic compensation depth at a hypothetical TDGS of 130%. The hydrostatic compensation depth is the depth at which the hydrostatic pressure equals the total gas pressure and below which gas bubble disease does not typically occur. The relative exposures, in ascending order of severity, were LNS, LSS, WAL, BLS, NPM and STH. Based on these results, the STH from the net pens are expected to show signs and mortality due to gas bubble disease prior to several of the resident species tested, though species-specific tolerances to TDGS should also be considered.