Abstract
AB Aquatic Biology Contact the journal Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout the JournalEditorsTheme Sections AB 6:281-287 (2009) - DOI: https://doi.org/10.3354/ab00132 Theme Section: Directions in bivalve feeding Particle retention efficiency of asari clam Ruditapes philippinarum larvae Naoaki Tezuka1,*, Erika Ichisaki2,3, Masaei Kanematsu1, Hironori Usuki1, Masami Hamaguchi1, Kazuo Iseki2 1National Research Institute of Fisheries and Environment of Inland Sea, Fisheries Research Agency, Maruishi 2-17-5, Hatsukaichi, Hiroshima 739-0452, Japan 2Hiroshima University, Kagamiyama 1-4-4, Higashi-hiroshima, Hiroshima 739-8528, Japan 3Present address: Nagasaki Prefectural Institute of Fisheries, Taira 1551-4, Nagasaki 851-2213, Japan *Email: tezukan9@fra.affrc.go.jp ABSTRACT: Larval food abundance is one potential cause of recruitment variation in benthic invertebrates, including bivalves. Bivalve veliger larvae can clear particles <~10 µm. However, the particle retention efficiency (PRE) of bivalve larvae differs among species, so is necessary to determine larval food abundance in nature. We investigated the PRE of larvae of the asari clam Ruditapes philippinarum, which recently has greatly decreased in numbers in Japan. Artificially hatched larvae from the umbo to the full grown stage were exposed to natural food assemblages. Larval clearance rates were determined for particles in 32 size ranges from 0.8 to 18 µm. We observed significant clearance of particles in the ~1 to 8 µm size range, with the highest clearance rates being on 1.4 to 2.0 µm particles. Larval ingestion of the natural food assemblages ranged from 50 × 102 to 120 × 102 µm3 ind.–1 h–1, which is below the hatchery food ration, suggesting larval food limitation in nature. KEY WORDS: Ruditapes philippinarum · Clam larvae · Clearance rate · Particle retention efficiency Full text in pdf format PreviousNextCite this article as: Tezuka N, Ichisaki E, Kanematsu M, Usuki H, Hamaguchi M, Iseki K (2009) Particle retention efficiency of asari clam Ruditapes philippinarum larvae. Aquat Biol 6:281-287. https://doi.org/10.3354/ab00132 Export citation RSS - Facebook - Tweet - linkedIn Cited by Published in AB Vol. 6. Online publication date: August 11, 2009 Print ISSN: 1864-7782; Online ISSN: 1864-7790 Copyright © 2009 Inter-Research.
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