Butman C A (2 results)
Published by 1st. Ed. Pub. National Academy Press. 1995, 1995
- Hardcover
Seller: C. Arden (Bookseller) ABA, Hay-on-Wye, United KingdomC. Arden (Bookseller) ABA
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Add to basketHardcover. pp.xii, 114 with b/w. figs. 8vo. Signature. Fine hardback. Outlines the current state of knowledge, and proposes a national research agenda to provide a blueprint for US government agencies to improve the understanding of marine biological diversity.
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Add to basketCompetent pediveligers of the coot clam Mulinia lateralis (Say) clearly preferred an organically-rich mud over abiotic glass beads in 24-h flume experiments, and often demonstrated the same choice in still-water experiments. We hypothesize that peediveligers with characteristic helical swimming paths above the bottom can exercis…e habitat choice in both still water nad flow, but that the limited swimming ambits of physiologically older periveligers require near-bottom flows to move the larvae between sediment patches so that they can exercise habitat choice. Although M. lateralis larvae are planktotrophic, their ability to delay metamorphosis in the absence of a preferred sediment cue is limited to about five days, a shorter time than the lecithotrophi larvae of the opportunistic polychaete species, Capitella spp. I and II. Field distributions of all three opportunistic species may result, at least in part, from active habitat selection for high-organic sediments by settling larvae. 12 pp., 5 figs, gr. 8.
