US-Czechoslovakia Research on Effects of Growth Rate on Gonadal Differentiation in Common Carp and European Tench

俄克拉何马大学的William L. Shelton博士和捷克斯洛伐克Vodnany渔业研究所的Otomar Linhart博士共同开展的美国-捷克斯洛伐克研究项目，将决定鲤鱼（Cyprinus carpio）和欧洲鲱鱼（Tinca Tinca）的性腺分化如何受到生长速度的影响，受密度依赖和温度的控制。在这些研究中确定的基本关系将应用于雄激素诱导的性逆转的方案优化。表型性别的功能被强调为养殖生产全雌性后代的育种计划的一个组成部分。美国和捷克斯洛伐克的科学家将合作进行这项研究，并在各自的国家对鲤鱼和鲱鱼进行调查。他们将在第一年将每个物种的后代以不同的密度储存在不同的栖息地（池塘，水箱，网围栏），并从组织学上检查性腺分化的时间/大小相关年表。在第二年，他们将发展出性腺分化的温度/大小-时间关系。在第三年，他们将把密度-温度介导的性腺分化与甲基睾酮功能性逆转的疗效测试结合起来。这项调查融合了基本问题和实用问题的二分法。这个水产养殖和生态系统动力学项目实现了推进科学知识的计划目标，使美国和东欧的领先专家能够在共同感兴趣和有能力的领域结合互补的人才和集中资源。

This U.S.-Czechoslovakia research project between Dr. William L. Shelton of the University of Oklahoma and Dr. Otomar Linhart of the Fisheries Research Institute, Vodnany, Czechoslovakia, will determine how gonadal differentiation of common carp (Cyprinus carpio) and the European tench (Tinca tinca) is affected by growth rate, controlled by density dependency and temperature. The basic relationship determined in these studies will be applied to protocol optimization of androgen-induced sex reversal. Functionality of the phenotypic sex is emphasized as a component of a breeding program to produce all- female progeny for aquaculture. U.S. and Czechoslovakian scientists will collaborate on this research, and conduct the investigation on carp and tench in their own countries. They will stock progeny of each species at various densities in different habitats (ponds, tanks, net enclosures) during year one, and examine the time/size-related chronology of gonadal differentiation histologically. In year two, they will develop a temperature/size-time relationship of gonadal differentiation. During the third year, they will integrate the density- temperature mediated gonadal differentiation with efficacy testing of functional sex reversal with methyltestosterone. This investigation merges the dichotomy of a basic question and a pragmatic problem. This project in aquaculture and ecosystem dynamics fulfills the program objective of advancing scientific knowledge by enabling leading experts in the United States and Eastern Europe to combine complementary talents and pool resources in areas of strong mutual interest and competence.