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• W2034239416 abstract "MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout the JournalEditorsTheme Sections MEPS 404:69-78 (2010) - DOI: https://doi.org/10.3354/meps08488 Light influences feeding and growth of echinoplutei L. Milonas1, B. Pernet2, B. L. Bingham1,* 1Department of Environmental Sciences, Western Washington University, Bellingham, Washington 98225, USA 2Department of Biological Sciences, California State University, Long Beach, Long Beach, California 90840, USA *Corresponding author. Email: brian.bingham@wwu.edu ABSTRACT: Because planktonic invertebrate larvae may be food-limited, anything that increases feeding and digestive efficiency should increase the chances of larval survival to metamorphosis. As light directly enhances both feeding and digestion in some planktonic heterotrophic protists, we hypothesize that similar processes might occur in the larvae of marine invertebrates. We studied the direct effects of light on feeding and development in sea urchin larvae (Strongylocentrotus droebachiensis, S. franciscanus and sand dollar Dendraster excentricus). Larvae were placed in 12:12 h light:dark cycles or in complete darkness and ingestion rates were measured. We monitored larval morphology during the first 2 to 3 wk of development and tested for light-related differences. Short-term changes in light regime had no effect on feeding rates. However, larvae of all 3 species showed longer-term diel feeding patterns with ingestion rates generally higher during daylight hours. These patterns persisted in S. franciscanus larvae even when larvae were held in complete darkness for 3 d. Larvae of D. excentricus exposed to natural light cycles developed longer arms usually associated with food limitation; those held in darkness had significantly shorter arms. The developing juvenile structures (i.e., rudiments) of S. droebachiensis larvae exposed to light were significantly smaller than those of larvae held in continuous darkness, suggesting that light may have negative effects on larval growth and development. Measuring the effects of light on feeding and growth may clarify the behaviors of invertebrate larvae during their critically important planktonic period. KEY WORDS: Light effects · Larval feeding · Larval growth · Larval morphology Full text in pdf format PreviousNextCite this article as: Milonas L, Pernet B, Bingham BL (2010) Light influences feeding and growth of echinoplutei. Mar Ecol Prog Ser 404:69-78. https://doi.org/10.3354/meps08488 Export citation RSS - Facebook - Tweet - linkedIn Cited by Published in MEPS Vol. 404. Online publication date: April 08, 2010 Print ISSN: 0171-8630; Online ISSN: 1616-1599 Copyright © 2010 Inter-Research." @default.
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• W2034239416 title "Light influences feeding and growth of echinoplutei" @default.
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