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首页> 外文期刊>The Progressive Fish-Culturist >EFFECTS OF TETRACYCLINE MARKING, TRANSPORT DENSITY, AND TRANSPORT TIME ON SHORT-TERM SURVIVAL OF WALLEYE FRY
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EFFECTS OF TETRACYCLINE MARKING, TRANSPORT DENSITY, AND TRANSPORT TIME ON SHORT-TERM SURVIVAL OF WALLEYE FRY

机译：茶色素标记，运输密度和运输时间对沃尔里炸薯条短期存活的影响

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摘要

Pennsylvania hatcheries annually produce nearly 100 million walleyes Stizostedion vitreum for the stocking of inland lakes and reservoirs. Because fry can be produced in greater numbers and at less expense than fingerlings, the vast majority of walleyes reared in Pennsylvania are stocked as fry. Despite extensive stocking efforts, survival of hatchery-reared walleye fry has been poor in most impoundments. The objective of this study was to evaluate several prestocking variables that may affect short-term survival of walleye fry. In a 24-h simulated stocking bioassay, we evaluated survival of hatchery-reared walleye fry subjected to several different production variables including tetracycline marking, hauling time, and hauling density. Mean fry survival ranged from 87.0% to 97.3% among all treatment groups, indicating that high poststocking mortality is not a result of these production variables within the ranges tested.
机译：宾夕法尼亚州的孵化场每年生产近1亿只角膜白斑鱼，用于内陆湖泊和水库的放养。由于与鱼种相比，可以生产更多且成本更低的鱼苗，因此宾夕法尼亚州饲养的绝大多数角膜白斑都作为鱼苗入库。尽管进行了广泛的放养努力，但在大多数水库中，孵化场饲养的角膜白斑鱼的存活率一直很差。这项研究的目的是评估可能影响角膜白斑鱼的短期存活的几个预放养变量。在24小时的模拟放养生物测定中，我们评估了孵化场饲养的角膜白斑鱼在几种不同生产变量（包括四环素标记，牵引时间和牵引密度）下的存活率。在所有处理组中，平均鱼苗成活率在87.0％至97.3％之间，这表明放养后死亡率高并不是这些生产变量在测试范围内的结果。

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