Main Title |
Variations in Larval Growth and Metabolism of an Estuarine Shrimp 'Palaemonetes pugio' during Toxicosis by an Insect Growth Regulator. |
Author |
McKenney, C. L. ;
Celestial, D. M. ;
|
CORP Author |
Environmental Research Lab., Gulf Breeze, FL. ;Technical Resources, Inc., Gulf Breeze, FL. |
Publisher |
c1993 |
Year Published |
1993 |
Report Number |
EPA/600/J-93/287 ;CONTRIB-803; |
Stock Number |
PB93-236255 |
Additional Subjects |
Shrimp ;
Insects ;
Growth regulators ;
Toxicity ;
Water pollution effects(Animals) ;
Larvae ;
Estuaries ;
Growth ;
Metabolism ;
Oxygen ;
Analysis of variance ;
Reprints ;
Methoprene ;
Palaemonetes pugio
|
Holdings |
Library |
Call Number |
Additional Info |
Location |
Last Modified |
Checkout Status |
NTIS |
PB93-236255 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
Collation |
9p |
Abstract |
The report presents the following conclusions: (1) Exposure of the estuarine shrimp, Palaemonetes pugio, to a juvenile hormone analogue (> or = 8 microgram methoprene/l) throughout larval development inhibited successful completion of metamorphosis; (2) Methoprene exposure retarded growth in early larval stages and postlarvae, but enhanced growth in premetamorphic larvae; (3) Respiration rates of early larvae were elevated by methoprene exposure, but not so older larvae or postlarvae; (4) Lower net growth efficiency (K2 values) in methoprene-exposed early larvae suggests that increased metabolic demands reduced assimilated energy available for growth; and (5) Modifications in O:N ratios of premetamorphic larvae and postlarvae suggest that methoprene altered substrate utilization patterns during metamorphosis. |