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首页> 美国卫生研究院文献>other >Population Dynamics and Diet of the Madamango Sea Catfish Cathorops spixii (Agassiz 1829) (Siluriformes: Ariidae) in a Tropical Bight in Southeastern Brazil
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Population Dynamics and Diet of the Madamango Sea Catfish Cathorops spixii (Agassiz 1829) (Siluriformes: Ariidae) in a Tropical Bight in Southeastern Brazil

机译：巴西东南部热带海域Madamango海Cat鱼Cathorops spixii（Agassiz1829）（Siluriformes：Ariidae）的种群动态和饮食

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The madamango sea catfish, Cathorops spixii (Siluriformes: Ariidae), is often among the most abundant fishes on the South American Atlantic coast. In the present study, conducted in shallow, non-estuarine coastal areas of Caraguatatuba Bight in southeastern Brazil, collections of this species, the most abundant member of the ichthyofauna, included primarily medium-sized individuals, indicating that the area may play a specific role in their development. Although studies of the local ichthyofauna have been much neglected, the area is economically important and its ecological significance is undervalued. This study primarily treats habitat use by C. spixii, assessing certain population parameters and the dietary composition. Monthly samples were taken from August 2003 through October 2004, with three trawls in two areas, corresponding to depths of about 1 to 4 m. The catfish showed two main peaks of abundance in the area, in April/May and July 2004. A mode around 9 cm SL persisted through time, and the entrance of younger recruits peaked from January to April. The low estimate for body-growth parameters (K = 0.16) corroborates some K-strategist characteristics of the species. The asymptotic length was 27.3 cm SL and total mortality (Z) was 1.01 yr−1. Cathorops spixii showed an omnivorous feeding habit, preying mainly upon polychaetes, copepods and bivalves, with considerable seasonality in its diet.
机译：Madamango海sea鱼Cathorops spixii（Siluriformes：Ariidae）通常是南美大西洋沿岸最丰富的鱼类之一。在本研究中，在巴西东南部的Caraguatatuba Bight的浅水，非河口沿海地区进行的研究中，该鱼类是鱼腥鱼的最丰富成员，主要包括中型个体，表明该区域可能起特定作用在他们的发展中。尽管对本地鱼鳞鱼的研究已被大大忽略，但该地区具有重要的经济意义，其生态价值却被低估。这项研究主要是治疗隐孢子虫的栖息地，评估某些种群参数和饮食组成。从2003年8月至2004年10月，每月取样两次，分别在两个区域进行了三个拖网作业，对应的深度约为1-4 m。 fish鱼在2004年4月，5月和7月在该地区出现了两个主要的丰度峰值。随着时间的流逝，约9厘米SL的模式持续存在，而新兵的进入则在1月至4月达到顶峰。人体生长参数的低估（K = 0.16）证实了该物种的某些K策略家特征。渐近长度为27.3 cm SL，总死亡率（Z）为1.01 yr​​ -1 。中华（Catholops spixii）表现出杂食性，主要捕食多毛类，co足类和双壳类，其饮食具有相当的季节性。

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