Aggregation and species coexistence of ectoparasites of marine fishes

Morand, Sergé; Poulin, Robert; Rohde, Klaus; Hayward, Craig J.

doi:10.1016/s0020-7519(99)00029-6

Cited by 93 publications

(93 citation statements)

References 31 publications

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“…Thus, species are distributed in a way that interspecific interactions are reduced in order to facilitate coexistence (Morand et al 1999, Simková et al 2000. In this study, use of the A coefficient showed that there was a strong reduction of interspecific aggregation in relation to intraspecific aggregation, which might have facilitated the coexistence of cestodes in the spiral intestine.…”

Section: Discussionmentioning

confidence: 65%

“…At the infracommunity level, the species richness, diversity, dominance, niche breadth, niche overlap, and intraspecific and interspecific aggregation coefficients were considered as follows: Brillouin's diversity index (HB) because each infracommunity was fully censured (Magurran 1988), Berger-Parker dominance index (D), Levin's niche breadth (B), and Renkonen's niche overlap (R) according to Simková et al (2000). In order to compare intraspecific aggregation vs interspecific aggregation, the coefficients of intraspecific (J) and interspecific (C) aggregation, and the reduction in competition caused by intraspecific aggregation in a pair of species (A) according to the coexistence aggregation model, were adapted considering each chamber of the spiral intestine as a different 'patch' (see Morand et al 1999). Whenever it was possible, the infracommunities were classified as "light" and "heavy" infections according to the intensity of infections for the different species of cestodes, where "n" is the number of specimens and "n" the number of infracommunities.…”

Section: Introductionmentioning

confidence: 99%

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Distribution patterns and interactions of cestodes in the spiral intestine of the narrownose smooth-hound shark, Mustelus schmitti Springer, 1939 (Chondrichthyes, Carcharhiniformes)

Alarcos¹,

Ivanov²,

Sardella³

2006

Acta Parasitologica

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The distribution patterns and the cestode species interactions within the spiral intestine of 20 specimens of Mustelus schmitti from coastal waters off Mar del Plata, Argentina were studied. Six cestode species were found: Tetraphyllideans Calliobothrium barbarae, C. australis, C. lunae and Orygmatobothrium schmittii, diphyllidean Echinobothrium notoguidoi and trypanorhynch Eutetrarhynchus vooremi. The most common number of parasite species per host was 3. Brillouin's diversity index ranged from 0.1 to 1.2. Berger-Parker dominance index indicated that C. barbarae was the dominant species, followed by O. schmittii and C. australis. Calliobothrium barbarae, C. australis and O. schmittii presented a broad distribution along the spiral intestine, whereas C. lunae, E. notoguidoi and E. vooremi showed a more restricted niche breadth. In general, the Renkonen's index showed no evidence of niche overlap in the range of distribution of the different species. In most of the infracommunities, intraspecific aggregation was stronger than interspecific aggregation, indicating that competition may play a little role. The distribution patterns of the Calliobothrium specimens concurs with the predictions of attachment sites for Calliobothrium species made by previous authors.

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Section: Discussionmentioning

confidence: 65%

Section: Introductionmentioning

confidence: 99%

Distribution patterns and interactions of cestodes in the spiral intestine of the narrownose smooth-hound shark, Mustelus schmitti Springer, 1939 (Chondrichthyes, Carcharhiniformes)

Alarcos¹,

Ivanov²,

Sardella³

2006

Acta Parasitologica

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“…This leads to the unanticipated conclusion that within-host adaptive diversification of macro-parasites does not depend on the level of aggregation among hosts. Such a conclusion contrasts with the recognized effects of aggregation on population dynamics [38,44] interspecific competition [43,57], and the evolution of both host and parasite [40]. Interestingly, the comparison of speciation rates between clades of monogeneans with low and high levels of aggregation was consistent with this theoretical prediction.…”

Section: Discussionmentioning

confidence: 75%

Within-host competition and diversification of macro-parasites

Rascalou

Šimková

Morand

et al. 2012

J. R. Soc. Interface.

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Although competitive speciation is more and more regarded as a plausible mechanism for sympatric speciation of non-parasite species, virtually no empirical or theoretical study has considered this evolutionary process to explain intra-host diversification of parasites. We expanded the theory of competitive speciation to parasite species looking at the effect of macro-parasite life history on the conditions for sympatric speciation under the so-called pleiotropic scenario. We included within-host competition in the classical Anderson and May framework assuming that individuals exploit within-host resources according to a quantitative trait. We derived the invasion fitness function of mutants considering different distributions of individuals among hosts. Although the mutant fitness depends on parameters describing the key features of macro-parasite life history, and on the relative distributions of mutant and residents in hosts, the conditions for competitive speciation of macro-parasites are exactly the same as those previously established for free-living species. As an interesting by-product, within-host competitive speciation is expected not to depend on the aggregation level of the parasites. This theoretical pattern is confirmed by comparing the speciation rate of weakly and strongly aggregated monogenean parasites.

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“…For Rohde (1994), positive interactions are more frequent between fish ectoparasites of the same host than negative interactions. Niche heterogeneity, unpredictable recruitment or the aggregated utilization of fragmented resources favour species coexistence (Morand et al, 1999).…”

Section: Discussionmentioning

confidence: 99%

Microecology of Monogenean Gill Parasites of Tilapia Rendalli Boulenger, 1897 From Bamendjing Lake, Cameroon

Jeannette¹,

Miriane²,

Francis³

2017

JEE

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The present work aimed to study preferences for microhabitat by the monogenean gill parasites of Tilapia rendalli Boulenger, 1897. Fifty-four specimens were sampled using gill net in February 2014 at Bamendjing Lake. Each gill arch was removed and examined to both quantify the number of parasites and their distribution on the gills. This examination enabled us to find 6583 specimens of monogeneans belonging to 5 different species, Cichlidogyrus arthracanthus, C. dossoui, C. quaestio, C. tiberianus and C. tilapiae with 3708, 1708, 858, 210 and 99 individuals respectively. All species were aggregated within the host population. ISSN 2157-6092 2017 www.macrothink.org/jee Journal of Environment and Ecology 44The spatial distribution of each parasite species was studied on different partitions of the gill arches. This study supports the hypothesis that gill site preference is a result of water flow over gills during respiration and mate finding habitat. There was no evidence of competition among the various species.

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Aggregation and species coexistence of ectoparasites of marine fishes

Cited by 93 publications

References 31 publications

Distribution patterns and interactions of cestodes in the spiral intestine of the narrownose smooth-hound shark, Mustelus schmitti Springer, 1939 (Chondrichthyes, Carcharhiniformes)

Distribution patterns and interactions of cestodes in the spiral intestine of the narrownose smooth-hound shark, Mustelus schmitti Springer, 1939 (Chondrichthyes, Carcharhiniformes)

Within-host competition and diversification of macro-parasites

Microecology of Monogenean Gill Parasites of Tilapia Rendalli Boulenger, 1897 From Bamendjing Lake, Cameroon

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