Survival and Growth of Rainbow Trout (Salmo gairdneri) in Four Prairie Lakes, North Dakota
Survival and Growth of Rainbow Trout (Salmo gairdneri) in Four Prairie Lakes, North Dakota
复制标题
北达科他州四草原湖虹鳟鱼 (Salmo gairdneri) 的生存和生长
DOI：
10.1139/f76-150
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发表时间：
1976
影响因子：
1.1
通讯作者：
J. Peterka
中科院分区：
文献类型：
--
作者：
G. Myers;J. Peterka
虹鳟鱼（萨尔莫gairdneri）在三个北达科他州草原湖泊的生存率低放养后的第1个月，从15至54%不等，高死亡率可能是由于鸟类捕食。在第四个湖，其中77%的第一个月存活，没有观察到捕食性鸟类。8月，两个湖泊中的所有鱼类都死亡，当时溶解氧水平降至1.0毫克/升以下，此前7月蓝藻水华达到28毫米3/升和63毫米3/升。 在其他两个湖泊，10月份的捕捞量占鱼类总储量的0.1%至4.4%。平均湿重在收获的272克是足够的商业用途，但是，特殊的管理，以提高成活率将是必要的，在湖泊研究。
Survival of rainbow trout (Salmo gairdneri) in three North Dakota prairie lakes was low the 1st mo after stocking, ranging from 15 to 54%; high mortality may have been due to bird predation. In a fourth lake, where 77% survived the 1st mo, no predatory birds were observed. All fish in two lakes died in August when dissolved oxygen levels dropped to below 1.0 mg/liter following July blue-green algae blooms of 28 and 63 mm3/liter. In the other two lakes, harvests in October ranged from 0.1 to 4.4% of fish stocked. Mean wet weights at harvest of up to 272 g were sufficient for commercial use; however, special management to improve survival rates would be necessary in the lakes studied.