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标题：First record of the North American black bullhead Ameiurus melas (Rafinesque, 1820) in the Guadalquivir Estuary (Southern Spain)
其他标题：First record of the North American black bullhead Ameiurus melas (Rafinesque, 1820) in the Guadalquivir Estuary (Southern Spain)
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作者：Juan Garcia-de-Lomas ; Elías Dana ; Javier López-Santiago 等
期刊名称：Aquatic Invasions
印刷版ISSN：1798-6540
电子版ISSN：1818-5487
出版年度：2009
卷号：4
期号：4
页码：719-723
DOI：10.3391/ai.2009.4.4.23
摘要：The North American black bullhead Ameiurus melas has been recorded for the first time in the Guadalquivir Estuary. The abundance of A. melas was monitored and quantified after first detection (February, 2007), with captures in two consecutive surveys (from October to December for 2007 and 2008) using nylon fyke nets. Catch per unit effort (CPUE) showed a rapid increase from 0.11 individuals per net in 2007 to 0.47 ind net -1 in 2008. Additionally, A. melas specimens collected in the 2008 survey (n = 1563), were measured (LT) and weighed to study the population structure and allometric growth relationship. The rapid increase in abundance of A. melas , together with the cohort analysis of individuals collected in the 2008 survey, suggest that incipient reproduction of black bullhead is already occurring. The invasion of A. melas constitutes a new threat to biodiversity in the Guadalquivir Estuary and connected natural parks and reserves (e.g., Do�ana National Park). It also presents potential economic damage to fisheries and aquaculture fish-farms.
关键词：Ictaluridae;catfish;non-native species;biological invasions