Factors shaping the parasite communities of trout-perch, Percopsis omiscomaycus Walbaum (Osteichthyes : Percopsidae), and the importance of scale
| dc.contributor.author | Nelson, PA | |
| dc.contributor.author | Dick, TA | |
| dc.date.accessioned | 2007-10-30T13:58:44Z | |
| dc.date.available | 2007-10-30T13:58:44Z | |
| dc.date.issued | 2002-11-31 | |
| dc.description.abstract | Trout-perch (Percopsis omiscomaycus Walbaum) provide a useful model in which to study fish-parasite communities because they have restricted trophic categories, they represent a single widely distributed taxon in North America, and numerous compound community surveys exist for comparison at the local and biogeographical scales. Forty-two species are reported from trout-perch, with 19 species known from Dauphin Lake, Manitoba, Canada. The most prevalent parasites species increased with host age, relating to increased food intake and (or) shifts in dietary preference towards larger food items. Randomization methods developed here demonstrate observed richness, and diversity patterns are nonrandom for local infracommunities and regional component communities. High mean overlaps, combined with high number of shared parasites and diversity estimates, indicate a predictable system. Schooling, maximum size, and age restricted the trout-perch diets to macroinvertebrates, resulting in extensive dietary sharing, which produced their homogenous infracommunities. Inshore-offshore diurnal movements combined with limited trophic categories revealed predictable component communities at the biogeographical scale. Eight parasites were predictable at the local scale and six at the regional scale (comprising two strictly host-specific species and four ecological species). Ecological predictability was determined by repeated predator-prey patterns, preferred host habitat, and niche sympatry. Trout-perch parasite communities, at both the local and regional scales, were determined by stable infracommunity processes and fish community complexity, which influence the component communities at the local scale. | en |
| dc.format.extent | 599800 bytes | |
| dc.format.mimetype | application/pdf | |
| dc.identifier.citation | 0008-4301; CAN J ZOOL, NOV 2002, vol. 80, no. 11, p.1986 to 1999. | en |
| dc.identifier.uri | http://hdl.handle.net/1993/2949 | |
| dc.language.iso | eng | en_US |
| dc.rights | No part of the NRC Research Press electronic journals may be reproduced, stored, or transmitted in any form or by any means, without the written permission of the publisher, except as stated below. Under the Canadian Copyright Act, individuals may download or print single copies of articles for personal research or study. Any person may reproduce short excerpts from articles in the journals for any purpose that respects the moral rights of authors, provided that the source is fully acknowledged. As a courtesy, the consent of authors of such material should be obtained directly from the author. Authorization to reproduce items for other than personal research or study, as stated above, may be obtained via Access © upon payment of the copyright fee of $10.00 per copy. NRC Research Press also extends certain additional rights to authors. The above rights do not extend to copying or reproduction for general distribution, for advertising or promotional purposes, for creating new collective works, or for resale. For such copying or reproduction, arrangements must be made with NRC Research Press. | en |
| dc.rights | open access | en_US |
| dc.status | Peer reviewed | en |
| dc.subject | HELMINTH COMMUNITIES | en |
| dc.subject | YELLOW PERCH | en |
| dc.subject | DAUPHIN LAKE | en |
| dc.subject | FISH | en |
| dc.subject | PATTERNS | en |
| dc.subject | DETERMINANTS | en |
| dc.subject | DIVERSITY | en |
| dc.subject | ONTARIO | en |
| dc.title | Factors shaping the parasite communities of trout-perch, Percopsis omiscomaycus Walbaum (Osteichthyes : Percopsidae), and the importance of scale | en |
| dc.type | journal article | en_US |