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Fish yields in Cuban reservoirs and relationships with some morphometric and edaphic parameters

机译：古巴水库的鱼类产量及其与某些形态学和深度参数的关系

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摘要

Cuba is located between 19°49′ and 23°18′ north latitude and 74°08′ and 84°57′ west longitude. It is the largest island in the Caribbean Sea and the paucity of natural lakes and the prolonged dry season makes it necessary to construct reservoirs. During the past 36 years, Cuba has built 220 large reservoirs (> 100 ha) and 800 smaller ones (< 100 ha). Reservoirs are the most important standing waters in Cuba and their fish, although of low diversity, support productive fisheries, with tilapias contributing 92% of the total production by weight. The fisheries in reservoirs located in the eastern and central parts of the island were analysed during the period 1983–92. The mean depth (z) of reservoirs here is 5.9 m, ranging from 1.8 to 16.0 m. The best correlation coefficients and fit regression in 54 Cuban reservoirs were between FY (fish yield) and DE (diversity of exploitation); when data were analysed with a multiplicative statistical model, r = 0.70, FY = 4.795 DE0.9292; and between TC (total catch) and A (area), but in this case data were analysed with a linear statistical model, r = 0.91, TC = 17209A–6635.56. Regression between FY versus z was relatively low and inverse, r = −0.20, FY = 249.145–11.04z, although all regressions were statistically significant (P < 0.01).
机译：古巴位于北纬19°49'和23°18'之间，西经74°08'和84°57'之间。它是加勒比海最大的岛屿，天然湖泊稀少，干旱季节漫长，因此有必要建造水库。在过去的36年中，古巴建造了220个大型水库（> 100公顷）和800个小型水库（<100公顷）。水库是古巴及其鱼类最重要的死水，尽管多样性低，但它们支持生产性渔业，罗非鱼占重量的92％。在该岛东部和中部的水库中的渔业在1983-92年期间进行了分析。此处的储层平均深度（z）为5.9 m，范围为1.8至16.0 m。 54个古巴水库的最佳相关系数和拟合回归在FY（鱼类产量）和DE（开采多样性）之间；用乘法统计模型分析数据时，r = 0.70，FY = 4.795 DE0.9292；在TC（总捕获量）和A（面积）之间，但是在这种情况下，数据使用线性统计模型进行了分析，r = 0.91，TC = 17209A–6635.56。 FY与z之间的回归相对较低且呈倒数，r = −0.20，FY = 249.145-11.04z，尽管所有回归均具有统计学意义（P <0.01）。

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