Experimental studies on the bioaccumulation and bioavailability of colloidally-bound trace metals to penaeid shrimp /
(abdomen, carapace, and hepatopancreas). For example,
| Main Author: | |
|---|---|
| Format: | Thesis eBook |
| Language: | English |
| Published: |
[Place of publication not identified] :
[publisher not identified] ;
1996.
|
| Subjects: | |
| Online Access: | Link to OAKTrust copy |
| Summary: | (abdomen, carapace, and hepatopancreas). For example, abdomen in both treatments for all metals tested. Depuration and Zn. Conversely, free-ionic trace metals tended to Co, Hg, and Mn in juvenile penaeid shrimp. The duration of colloid-ion complexes and the chemical characteristics of colloidally-bound trace metals generally had higher concentration factors compared to free-ionic metals in the demonstrated that colloidally-complexed forms of trace metals dissolved phase (free-ionic) forms of Ag, Cd, Ba, Fe, Sn, Zn, exhibit higher concentration factors compared to colloidal experiment lasted 7 days. The experiments clearly extents of uptake were not observed in these experiments. factors for metals in whole shrimp were generally higher for free-ionic forms compared to colloidal forms. However, hepatopancreas after 14 days of uptake, except for Ag, Ba, hepatopancreas far exceeded loadings within the carapace or in the abdomen, and Co in the carapace. Concentration influence bio-uptake across bi-lipid membranes. Penaeid introduced as colloidally-bound species. Accumulation of linked to the intake of water for respiration at the site of mechanisms mediated by specific carriers. metals from treatment solution into the internal tissues is metals in the abdomen and carapace, with the exceptions of Mn of accumulation, and deputation of colloidally-complexed and of metals from whole body and tissues was noted for both of uptake and deputation in the colloidal and free-ionic Radiotracers were used to compare the bioaccumulation, sites relative hydrophobicity of the colloid-ion complex could Results indicate that mass specific accumulation within the sediments), and their broad geographical distributions. shrimp are useful bioindicators because of their close species showing greater retention in shrimp than metals statistically significant differences in overall rates and the gills. Metals are then internalized by active transport the uptake experiment was 14 days, and the deputation these complexes may alter their bioavailability. The Trace metals in estuarine systems frequently exist as treatment regimes, with metals introduced as free-ionic treatments were noted for whole body and individual tissues trophic linkage to trace metal sinks (detritus, benthos, and were bioavailable to shrimp. Differences in rates and extent |
|---|---|
| Item Description: | "Major subject: Oceanography". Vita. |
| Physical Description: | x, 96 leaves : illustrations ; 28 cm. Also available online. Issued also on microfiche from Lange Micrographics. |
| Bibliography: | Includes bibliographical references: pages 70-80. |