STUDIES ON THE USE OF CLARIAS-ISHERIENSIS SYDENHAM (CLARIIDAE) AS A PREDATOR IN TILAPIA-GUINEENSIS DUMERIL (CICHLIDAE) PONDS

被引：6

作者：

FAGBENRO, OA

SYDENHAM, DHJ

机构：

[1] Department of Fisheries and Wildlife, Federal University of Technology, Akure

[2] Department of Zooiogy, University of Ibadan, Ibadan

来源：

JOURNAL OF APPLIED ICHTHYOLOGY-ZEITSCHRIFT FUR ANGEWANDTE ICHTHYOLOGIE | 1990年 / 6卷 / 02期

关键词：

D O I：

10.1111/j.1439-0426.1990.tb00507.x

中图分类号：

S9 [水产、渔业];

学科分类号：

0908 ;

摘要：

Quantitative evaluation of the dwarf African clariid catfish, Clarias isheriensis, as a predator to control excessive reproduction as well as to produce market‐size substrate‐breeding cichlid, Tikapia guineensis, was conducted in small earthen ponds at three Tikzpia/Charias stocking ratios (2:1, 5:1 and 10:1). During one roduction trial lastin 150 days, C. isheriensis reduced the T. guineensis fingerling population and edanced production of market‐size (≥ 150 g) tilapias. Effective control of T. guineensis fingerling population occurred in the 2:1 stocking ratio treatment resulting in total‐tilaia yiefd equivalent to about 4,548 kg ha‐1 yr‐1 and tilapia AT Value (the percentage of market‐size tilapia in the total tilapia opulation) of 96.2 at the preferred size with an average individual final weight of about 193 g. Differences in total tilapia yield, tilapia AT values and average individual final weight between T. guineensis in the 5:1 and 10:1 stocking ratio treatments were not significant (p > 0.05). All of the mixed‐culture treatments Tilapia/Clarias gave better feed conversion values than the control treatment (all Tilapia) (p ≤ 0.05). Copyright © 1990, Wiley Blackwell. All rights reserved

引用

页码：99 / 106

页数：8

共 24 条

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