Monogenean host specificity as a biological and taxonomic indicator for fish

Lambert, Alain; Gharbi, Salwa El

doi:10.1016/0006-3207(94)00085-5

Cited by 28 publications

(27 citation statements)

References 10 publications

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“…We found more similar attachment apparatus in the case of specialist infracommunities than in the case of generalists parasitizing at least two non-related host species. The haptor of monogeneans is a highly specialised organ with great importance for host specificity (Rohde 1989;Lambert and Gharbi 1995;Sˇimkova´et al 2001). Sˇimkova´et al (2001 found that the size of the haptor is positively correlated with the size of the fish in the case of specialist parasites, whereas no relationship was found in the case of generalist parasites.…”

Section: Discussionmentioning

confidence: 99%

Reproductive barriers between congeneric monogenean parasites (Dactylogyrus: Monogenea): attachment apparatus morphology or copulatory organ incompatibility?

et al. 2003

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Morphometrical parameters of the attachment apparatus and copulatory organs of 52 Dactylogyrus species parasitizing 17 species of cyprinid fishes were analysed to test for the existence of reproductive barriers among congeneric species. The minimal spanning tree (MST) method was applied in the analyses. The position of "real" parasite communities, based on (1) observed infracommunities, (2) a checklist of parasites for a given host in the morphological space, was compared to the position of randomly generated communities using all Dactylogyrus species. The distribution of species similarity within infracommunities (using both attachment and copulatory measurements) was not significantly different from that obtained by simulation, and this trend was similar for both the checklist and observed infracommunities. When real infracommunities were separated according to host specificity (specialists versus generalists), we found differences reflecting similarities in the shapes of attachment and copulatory organs. Within specialists, more similarities in the shape of the attachment apparatus can be found than within generalists, whereas the similarity in copulatory organ shape seems to be random. When generalists are considered, parasite infracommunities with the greater differences in attachment apparatus are also more different in terms of the shape of their copulatory apparatus. We conclude that specialist parasites possess more similarity in attachment apparatus due to specialisation to their host, whereas the species similarity in copulatory organs within infracommunities exhibits a random pattern, but with the copulatory organs being more variable than the attachment apparatus (which may be due to reproductive isolation). The morphology of the copulatory apparatus seems not to be the single factor explaining reproductive isolation among species.

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Section: Discussionmentioning

confidence: 99%

Reproductive barriers between congeneric monogenean parasites (Dactylogyrus: Monogenea): attachment apparatus morphology or copulatory organ incompatibility?

et al. 2003

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“…Nevertheless, a recent study gave an example of cospeciation correlated with increasing host specificity (Clayton and Johnson 2003). Host specificity is generally reported in Monogenean parasites (Rohde 1979(Rohde , 1989Poulin 1992;Lambert and El Gharbi 1995;Whittington et al 2000). However, several studies showed that Monogenea evolve by host switching rather than by cospeciation (Desdevises et al 2002b;Zietara and Lumme 2002).…”

Section: Origin Of Host Specificitymentioning

confidence: 99%

“…Morphology of the attachment organ, the haptor, is supposed to play an important role in parasite specialization and adaptation to host species (Rohde 1977(Rohde , 1979(Rohde , 1989Lambert and El Gharbi 1995;Š imková et al 2001a. Therefore, the shape of the attachment organ should represent an important feature connected with host specificity in monogenean parasites.…”

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confidence: 99%

Specificity and Specialization of Congeneric Monogeneans Parasitizing Cyprinid Fish

et al. 2006

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Abstract. Patterns and likely processes connected with evolution of host specificity in congeneric monogeneans parasitizing fish species of the Cyprinidae were investigated. A total of 51 Dactylogyrus species was included. We investigated (1) the link between host specificity and parasite phylogeny; (2) the morphometric correlates of host specificity, parasite body size, and variables of attachment organs important for host specificity; (3) the evolution of morphological adaptation, that is, attachment organ; (4) the determinants of host specificity following the hypothesis of specialization on more predictable resources considering maximal body size, maximal longevity, and abundance as measures of host predictability; and (5) the potential link between host specificity and parasite diversification. Host specificity, expressed as an index of host specificity including phylogenetic and taxonomic relatedness of hosts, was partially associated with parasite phylogeny, but no significant contribution of host phylogeny was found. The mapping of host specificity into the phylogenetic tree suggests that being specialist is not a derived condition for Dactylogyrus species. The different morphometric traits of the attachment apparatus seem to be selected in connection with specialization of specialist parasites and other traits favored as adaptations in generalist parasites. Parasites widespread on several host species reach higher abundance within hosts, which supports the hypothesis of ecological specialization. When separating specialists and generalists, we confirmed the hypothesis of specialization on a predictable resource; that is, specialists with larger anchors tend to live on fish species with larger body size and greater longevity, which could be also interpreted as a mechanism for optimizing morphological adaptation. We demonstrated that ecology of host species could also be recognized as an important determinant of host specificity. The mapping of morphological characters of the attachment organ onto the parasite phylogenetic tree reveals that morphological evolution of the attachment organ is connected with host specificity in the context of fish relatedness, especially at the level of host subfamilies. Finally, we did not find that host specificity leads to parasite diversification in congeneric monogeneans.

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“…Dactylogyrids are monogeneans presenting high host specificity (LAMBERT & EL GHARBI, 1995;WHITTINGTON et al, 2000). The dactylogyrids A. paraguayensis and V. fungulus were originally described infecting native P. corruscans (SURIANO & INCORVAIA, 1995;TAKEMOTO et al, 2009), and this is the first report of these parasites in the hybrid surubim.…”

Section: Discussionmentioning

confidence: 94%

Parasitological assessment in the hybrid surubim (Pseudoplatystoma reticulatum x P. corruscans), with uncommon occurrence of Monogenea parasites

Jerônimo

Pádua²,

Ventura

et al. 2016

Rev. Bras. Parasitol. Vet.

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This study evaluated the parasite fauna of farmed hybrid surubim (Pseudoplatystoma reticulatum x P. corruscans) and the host-parasite-environment relationship in two fish farms located in Mato Grosso do Sul, Central Brazil, South America. A total of 120 hybrids from two different farms, 60 in each season (30 in the hot and 30 in cold season) were examined during a year. Water quality was weekly measured to evaluate the interaction among environmental conditions and parasitism. Histopathology was used to observe the effects of the parasites and environment on the fish gills. The ciliate protozoan Ichthyophthirius multifiliis and the monogeneans (Ameloblastella sp., Amphocleithrium paraguayensis, Vancleaveus ciccinus, V. fungulus and V. janacauensis) were the most prevalent parasites detected in both seasons in both farms, with prevalence above 80%. It was stated that parasites did not cause important damage in the health status of the hybrid surubim. These results might be related to general good management practices and environmental quality implemented by the fish farmers. The presence of uncommon monogenean parasites to this hybrid compared to their parents causing an environmental and ecological concern is here discussed.

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Monogenean host specificity as a biological and taxonomic indicator for fish

Cited by 28 publications

References 10 publications

Reproductive barriers between congeneric monogenean parasites (Dactylogyrus: Monogenea): attachment apparatus morphology or copulatory organ incompatibility?

Reproductive barriers between congeneric monogenean parasites (Dactylogyrus: Monogenea): attachment apparatus morphology or copulatory organ incompatibility?

Specificity and Specialization of Congeneric Monogeneans Parasitizing Cyprinid Fish

Parasitological assessment in the hybrid surubim (Pseudoplatystoma reticulatum x P. corruscans), with uncommon occurrence of Monogenea parasites

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