Consequences of intraspecific seed-size variation in Sparganium emersum for dispersal by fish Pollux, B. J. A., Ouborg, N. J., van Groenendael, J. M. and Klaassen, M. 2007, Consequences of intraspecific seed-size variation in Sparganium emersum for dispersal by fish, Functional ecology, vol. 21, no. 6, pp. 1084-1091, doi: 10.1111/j.1365-2435.2007.01313.x. Attached Files Name Description MIMEType Size Downloads Title Consequences of intraspecific seed-size variation in Sparganium emersum for dispersal by fish Formatted title Consequences of intraspecific seed-size variation in Sparganium emersum for dispersal by fish Author(s) Pollux, B. J. A. Ouborg, N. J. van Groenendael, J. M. Klaassen, M. orcid.org/0000-0003-3907-9599 Journal name Functional ecology Volume number 21 Issue number 6 Start page 1084 End page 1091 Publisher Wiley-Blackwell Publishing Place of publication London, England Publication date 2007-12 ISSN 0269-8463 1365-2435 Keyword(s) endozoochory ichthyochory seed mass seed size selection seed traits Summary 1. The potential for seed dispersal by fish (ichthyochory) is likely to vary within aquatic plant species, depending on intraspecific variation in phenotypic seed traits. 2. We studied the effect of seed size variation within the unbranched burreed (Sparganium emersum) on the potential for internal dispersal by the common carp (Cyprinus carpio), by feeding them light (< 10 mg), medium (10–20 mg) and heavy ( > 20 mg) seeds, seed mass being positively related to seed size. 3. We hypothesized: (i) that ingestion, retention time, survival during gut passage and viability after gut passage of S. emersum seeds would be affected by seed size; and (ii) that this would translate into intraspecific variation in dispersal probability and dispersal distance among seed size categories. 4. Ingestion was negatively related to seed size, while survival during gut passage was positively related to seed size. Seed viability after gut passage was not affected by seed size. Since the negative effect of ingestion was counterbalanced by an equally strong but positive effect on seed survival, the probability of dispersal did not differ between the tested seed-size categories. 5. The time that seeds remained in the digestive tract of carp did not differ between seed sizes, suggesting equal potential dispersal distances for all seeds. Based on optimum swimming speeds of carp, ranging from 0·9 to 1·8 km h−1, maximum dispersal distances will most likely range from 13·5 to 27 km. 6. This study highlights the importance of studying all stages of the endozoochorous dispersal process in order to estimate the effect of a phenotypic seed trait on plant dispersal. Language eng DOI 10.1111/j.1365-2435.2007.01313.x Field of Research 060202 Community Ecology (excl Invasive Species Ecology) Socio Economic Objective 970106 Expanding Knowledge in the Biological Sciences HERDC Research category C1.1 Refereed article in a scholarly journal Copyright notice ©2007, The Authors Persistent URL http://hdl.handle.net/10536/DRO/DU:30035103 Document type: Journal Article Collections: School of Life and Environmental Sciences Centre for Integrative Ecology Related Links Link Description Connect to published version (restricted access) Go to link with your DU access privileges     Unless expressly stated otherwise, the copyright for items in DRO is owned by the author, with all rights reserved. Versions Version Filter Type Mon, 30 May 2011, 10:59:54 EST Fri, 22 Jul 2011, 09:46:18 EST Fri, 22 Jul 2011, 09:50:37 EST Fri, 22 Jul 2011, 09:51:24 EST Mon, 16 Jun 2014, 18:07:13 EST Filtered Full Citation counts:   Cited 21 times in TR Web of Science Cited 24 times in Scopus Search Google Scholar Access Statistics: 303 Abstract Views, 0 File Downloads  -  Detailed Statistics Created: Mon, 30 May 2011, 10:59:54 EST

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