| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
|
|
|
|||||||
|
|||||||||
1 Department of Biological Sciences, University of Southern California, Los Angeles, California 90089-0371
Larvae of the gastropod Haliotis rufescens are classified as "nonfeeding" because they cannot capture particulate foods. However, for only 1 out of 5 independent cultures was a net decrease observed in dry organic weight during the complete period of larval development (5 to 7 days). In fact, there were net increases in dry organic weight from the oocyte (day 0) to the newly formed veliger larva (2-day-old). These weight increases during early development could be explained by increases in the amounts of specific biochemical components of the larvae, relative to oocytes. The metabolic rates of larvae were measured (oxygen consumption) and used to compare (i) the required energy for development with (ii) the energy supplied from the catabolism of biochemical reserves. This analysis revealed that the cost of development for larvae could not be explained by the rates of use of the energy stores initially present in the oocyte. Larvae, from two independent cultures, could only supply 25% or 71% of their energy requirements by the use of internal reserves. Larvae of H. rufescens cannot use particulate foods and, thus, this energy resource cannot be invoked. Estimates of the contribution that dissolved organic material in seawater could provide to larvae, showed that this pool of exogenous material could supply the missing energy. It is suggested that "nonfeeding" larvae can feed, but that their only available nutrients are in a dissolved form.
Submitted on March 15, 1989
This article has been cited by other articles:
|
|
 |
|
  D. A. Pace and D. T. Manahan Cost of Protein Synthesis and Energy Allocation During Development of Antarctic Sea Urchin Embryos and Larvae Biol. Bull., April 1, 2007; 212(2): 115 - 129. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 D. E. Wendt and C. H. Johnson Using latent effects to determine the ecological importance of dissolved organic matter to marine invertebrates Integr. Comp. Biol., October 1, 2006; 46(5): 634 - 642. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
R. B. Emlet and S. S. Sadro Linking stages of life history: How larval quality translates into juvenile performance for an intertidal barnacle (Balanus glandula) Integr. Comp. Biol., June 1, 2006; 46(3): 334 - 346. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 D. A. Pace and D. T. Manahan Fixed metabolic costs for highly variable rates of protein synthesis in sea urchin embryos and larvae J. Exp. Biol., January 1, 2006; 209(1): 158 - 170. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
A. L. Moran and D. T. Manahan Energy Metabolism During Larval Development of Green and White Abalone, Haliotis fulgens and H. sorenseni Biol. Bull., June 1, 2003; 204(3): 270 - 277. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
M. S. Vickery, M. C. L. Vickery, and J. B. McClintock Morphogenesis and Organogenesis in the Regenerating Planktotrophic Larvae of Asteroids and Echinoids Biol. Bull., October 1, 2002; 203(2): 121 - 133. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
J. M. Staver and R. R. Strathmann Evolution of Fast Development of Planktonic Embryos to Early Swimming Biol. Bull., August 1, 2002; 203(1): 58 - 69. [Abstract] [Full Text] [PDF]
|
|
| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
