日夜的序列的相对分布有很强的影响许多鱼类,导致丰富的变化和组合的复合鱼。鱼类丰度发生变化主要是由于潮汐周期,月相,昼夜交替。定期监测这些河口生态系统的生物多样性需要更积极地追求来评估他们的地位。本研究调查了一昼夜的变化与潮汐的鱼社区水平Kakum加纳中部地区的河口。在每个取样日期、十铸件进行日夜在捕获每个sa总共20铸造mpl日期。总共1223条鱼属于25个物种,16个家庭,10832。8克的生物质记录在整个采样周期从2016年11月/ 4月/ 2017。日了24种,导致生物质鱼总数的52%和45%。夜间捕获有19种,导致生物质抓住总数的48%和55%。抓住权重的最丰富的物种Kakum河河口,在herbivore-phytoplankton Mugil curema,最高只在夜间。意味着鱼类明显不同潮-白天、黑夜(F3, 20 = 187.789, p = 7.3764)最高的物种值(36)记录在低潮(中等盐度)白天10/01/2016和最低种12/01/2017(19和21种17/03/2017)记录在潮流在夜间活动的时期。 The study provides strong indication that fish inhabiting Kakum River Estuary establish their niches along a temporal scale in Subject to the interaction with the tidal and the diel cycles. The fish community occurred in the estuary at different times during sampling and the abundance of fish changed on an irregular basis. This suggests that temperature may play an important role in determining the behavior of marine migrants. The geomorphological setting of the estuary plays an important role in influencing how fish use the estuary according to the tidal cycles.
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