A comparison of two tubificid oligochaete species as candidates for sublethal bioassay tests relevant to subtropical and tropical regions |
| |
Authors: | Mercedes R Marchese Ralph O Brinkhurst |
| |
Institution: | (1) Instituto Nacional de Limnología, Jose Maciá 1933, 3016 Santo Tomé, Santa Fe, Argentina;(2) Aquatic Resources Center, Box 680818, 37068-0818 Franklin, TN, USA |
| |
Abstract: | Two tubificid oligochaetes, Branchiura sowerbyi and Tubifex tubifex, were evaluated as potential test organisms for sediment bioassays. We attempt to reproduce the sediment bioassay proposed by Reynoldson et al. (1991) using his strain of Tubifex tubifex and his reference sediment and to compare this technique using Branchiura sowerbyi. This species was chosen because it is more common and dominant in tropical and subtropical environments than Tubifex tubifex. Data on survival and reproduction were obtained for both species, and growth estimates were obtained for B. sowerbyi. The sublethal bioassay with T. tubifex confirmed earlier estimates of a test duration of 4 weeks at 22.5 °C. B. sowerbyi cultures can produce usable estimates in 21 days at 30 °C. |
| |
Keywords: | Sediment bioassay Oligochaeta Tubifex tubifex Branchiura sowerbyi growth reproduction |
本文献已被 SpringerLink 等数据库收录! |
|