You are here: Home
/ Publication Information
Title: Niche partitioning in the cestode communities of two elasmobranchs
Author: Friggens, M. M.; Brown, J. H.
Source: Oikos. 108: 76-84.
Publication Series: Miscellaneous Publication
Description: Several randomization methods have been used to investigate the influence of competitive interactions in shaping parasite community structure. Marine fish parasite communities have often been regarded as unstructured assemblages with little or no resource limitation and, therefore, not prone to competitive influences. In this study, null models were used to assess the niche overlap of cestode communities of two distinct but closely related elasmobranch hosts: the round stingray, Urobatis halleri, Cooper (1863) and the skate, Leucoraja naevus, Muller and Henle (1841). Cestode species distributions were analyzed for randomness with respect to two niche axes: host size class and location within host spiral intestine. Niche overlap of cestode species was calculated for each niche type using MacArthur and Levins' and Pianka's indices, and compared to overlap values obtained from randomly generated communities. Cestodes of both host species were distributed heterogeneously among valves and host size-classes. The majority of parasite species (including all common ones) within U. halleri and all species within L. naevus had significantly nonrandom distributions with respect to at least one niche category. Cestode species pairs tended to overlap significantly less than expected in spiral intestine valves and significantly more than expected among host size classes. We conclude that cestode communities are structured deterministically in a way consistent with expectations based on competition.
Keywords: niche partitioning, cestode communities, elasmobranchs, marine fish parasite communities, Urobatis halleri, Leucoraja naevus
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
- You may send email to email@example.com to request a hard copy of this publication. (Please specify exactly which publication you are requesting and your mailing address.)
XML: View XML
Friggens, M. M.; Brown, J. H. 2005. Niche partitioning in the cestode communities of two elasmobranchs. Oikos. 108: 76-84.
Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility