Seasonal, tidal and diurnal changes in fish assemblages in the Ria Formosa lagoon (Portugal)
Seasonal, tidal and diurnal changes in fish assemblages in the Ria Formosa lagoon (Portugal)
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DOI：
10.1016/j.ecss.2005.11.036
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发表时间：
2006-04-01
影响因子：
2.8
通讯作者：
Erzini, K
中科院分区：
文献类型：
--
作者：
Ribeiro, J;Bentes, L;Erzini, K
鱼类区系收集在两个不同的潮下带浅的网站，海草和沙子，使用小梁拖网在里亚福尔摩沙泻湖（葡萄牙南部）。在低潮和高潮时，在白天和夜晚，在每个季节进行采样。与每个网站的鱼类组合显着不同，海草网站支持更大的鱼类丰度和更高的物种数量比沙子。这些网站相关的鱼类组合的差异比任何其他因素的研究。这两个网站的鱼类组合的季节性变化，主要是因为在春季和夏季的海洋少年移民的招聘。没有显着的潮汐或昼夜变化，观察到在两个网站的鱼类组合，但有一个显着的站点-潮汐相互作用，在低潮时海草中的鱼类丰度较高。在沙层中，潮汐效应只对某些物种有明显影响，在涨潮时，留居物种的数量更多，而在低潮时，海洋物种的数量更多。在里亚福尔摩沙沿海泻湖，鱼类区系的组成和结构，主要是受网站其次是季节。(c)2005爱思唯尔有限公司保留所有权利。
Fish fauna were collected in two different subtidal shallow sites, seagrass and sand, using a small beam trawl in the Ria Formosa lagoon (South Portugal). Samples were taken at low and high tides, during day and night, and in each season. Fish assemblages associated with each site were significantly different, with seagrass site supporting greater fish abundance and higher number of species than sand. These site-related differences in fish assemblages were stronger than any other factor studied. Both sites showed seasonal variations in their fish assemblages, mainly because of recruitment of marine juvenile migrants during spring and summer. No significant tidal or diel changes were observed in the fish assemblages of either site, but there was a significant site-tide interaction, with higher fish abundance in seagrass at low tide. In sand, tide effect was evident only for certain species, with resident species more abundant at high tide and marine species more abundant at low tide. Within the Ria Formosa coastal lagoon, ichthyofaunal composition and structure is mainly influenced by site followed by season. (c) 2005 Elsevier Ltd. All rights reserved.