Molecular evidence for the lack of transmission of the monogenean Sparicotyle chrysophrii (Monogenea, Polyopisthocotylea) and isopod Ceratothoa oestroides (Crustacea, Cymothoidae) between wild bogue (Boops boops) and cage-reared sea bream (Sparus aurata) and sea bass (Dicentrarchus labrax)

Mladineo, Ivona; Šegvić, Tanja; Grubišić, Leon

doi:10.1016/j.aquaculture.2009.07.017

Cited by 35 publications

(35 citation statements)

References 33 publications

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“…Weinstein & Heck 1977, Hayward et al 1998 and Mediterranean waters (e.g. CharfiCheikhrouha et al 2000, Matašin & Vu<inić 2008, Mladineo et al 2009), cymothoids frequently occur at prevalences below 25%. In contrast, prevalences in fish farms have been reported to exceed 50% and approach 100% (Sievers et al 1996, Horton & Okamura 2001, Mladineo 2002.…”

Section: Discussionmentioning

confidence: 99%

Benign effect of the fish parasitic isopod Ceratothoa cf. imbricata on Selenotoca multifasciata (Scatophagidae) from Australia

Carrassón

Cribb²

2014

Dis. Aquat. Org.

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The tongue-biter cymothoid isopod Ceratothoa cf. imbricata is nearly ubiquitous in buccal cavities of the banded scat Selenotoca multifasciata (Scatophagidae) from Waterloo Bay, south-east Queensland. To test whether infestation affects fish growth or condition significantly, we explored parasitism and condition in 122 S. multifasciata specimens. The internal area of the buccal cavity and that occupied by ovigerous female isopods were measured, allowing the relative proportion of free internal area of the buccal cavity (PFIAO) to be calculated. Of 122 fish, 119 (97.5%) were infected; 35.3% had large female isopods, the remaining infections comprised much smaller mancae, juveniles and adult males. Mean intensity of infection was significantly correlated with fish total length (TL). In some fish, the female isopod occupied up to 80% of the buccal cavity area. There was little evidence of attachment damage in the buccal cavity; only 9 of 43 hosts analysed had restricted damage to the tissues at the points of attachment of the female isopod. Condition factor, food intensity index and stomach weight did not differ between fish with and without female C. cf. imbricata. The relative proportion of free internal area of the buccal cavity with respect to the fish total length (PFIAO/TL 2 ratio) of fish infected with females correlated with food intensity and condition factor. Although the correlation was significant, the actual effect was not large because more than 70% of these 2 indices was not explained by the PFIAO/TL 2 ratio (r 2 < 0.3 in both cases). Despite the dramatic appearance of infestations and the high prevalence of C. cf. imbricata in the population, the near-absence of pathological alterations and the limited effect of the isopod on the condition indices and food intensity suggest that this isopod is relatively benign for S. multifasciata. KEY WORDS: Ceratothoa cf. imbricata · Oral ectoparasite · Selenotoca multifasciata · Asymptomatic infection Resale or republication not permitted without written consent of the publisherDis Aquat Org 110: [173][174][175][176][177][178][179][180] 2014 musculature of fishes. Most are highly site specific (Bunkley-Williams & Williams 1998). Females are always much larger than the males on an individual host.There are reports of various pathologies caused by cymothoids including tissue damage, growth defects, decrease in mean host weight and size, depressed fecundity and increased mortalities (Adlard & Lester 1994, 1995, Horton & Okamura 2001, Rajkumar et al. 2005, Ravi & Rajkumar 2007, Fogelman & Grutter 2008. In contrast, some studies have failed to find such serious effects of infection as those listed above (e.g. Ruiz & Madrid 1992, Landau et al. 1995, Bakenhaster et al. 2006. Species of the genus Ceratothoa affect both wild and cultured fish populations. These parasites may significantly depress growth or other parameters in both wild and cage-reared fishes (Šarušic 1999, Papapanagiotou & Trilles 2001, Mladineo 2002, Horton & Okamura 2003.Scats (family Sca...

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Section: Discussionmentioning

confidence: 99%

Benign effect of the fish parasitic isopod Ceratothoa cf. imbricata on Selenotoca multifasciata (Scatophagidae) from Australia

Carrassón

Cribb²

2014

Dis. Aquat. Org.

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“…Still, the effect of these interactions is poorly understood and there are conflicting views regarding their actual impact on the environment [7], [8]. While it is relatively easy to observe pathogen transfer if disease is contracted for the first time in the wild population after it has been diagnosed in introduced species, the evidence for potential continuous cross-contamination in natural conditions between two groups that share the same pathogen is more challenging [9], [10], [11]. Whether there is an explicit transfer of a given pathogen between wild and caged stocks, or each fish stock has been developing its own particular pathogen population, has been insufficiently studied and rarely supported by molecular tools (for a general review: http://www.dipnet.info/).…”

Section: Introductionmentioning

confidence: 99%

Morphological Plasticity and Phylogeny in a Monogenean Parasite Transferring between Wild and Reared Fish Populations

Mladineo

Šegvić-Bubić

Stanić³

et al. 2013

PLoS ONE

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It is widely accepted that disease interactions between cultured and wild fish occur repeatedly, although reported cases have mainly relied just on the observation of similar symptoms in affected populations. Whether there is an explicit pathogen transfer between fish stocks, or each develops its own pathogen population, has been insufficiently studied and rarely supported by molecular tools. In this study, we used population dynamics and genetic structure of the monogenean Furnestinia echeneis in reared and neighbouring wild sea bream to indicate pathogen transfer, characterized by the phenotypic plasticity of the parasite attachment apparatus and the lack of phylogenetic differentiation. The observed pattern of genetic variation inferred by nuclear DNA Internal Transcribed Spacer 1 (ITS1) and mtDNA cytochrome C oxidase 1 (COI), between parasite populations is most likely caused by a recent shared demographic history like a reduced species area in the last glacial period. In spite of such recent expansion that populations underwent, F. echeneis shows differentiation in haptor morphometry as an adaptive trait in closely related populations at the aquaculture site. This suggests that differentiation in morphology may occur relatively rapidly in this species and that adaptive forces, not the speciation process, drives this monogenean parasitation. On the other hand, the observed phylogenetic inertia suggests a low to moderate gene flow (based on FST) between parasites in cultured and wild fish, evidencing for the first time the transfer of pathogens at the aquaculture site inferred by a molecular tool.

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“…For example, in 2 Croatian farms, the polyopisthocotylean monogenean Sparicotyle chrysophrii and the cymothoid isopod Ceratothoa oestroides have both been isolated simultaneously from farmed sea bream, sea bass and wild bogue. However, analysis of the mitochondrial DNA marker cytochrome oxidase I (mtDNA COI) demonstrated that parasites inhabiting different hosts did not belong to the same population, but cluster separately, evidencing that no transfer of 2 parasite species occurred between wild and farmed fish (Mladineo et al 2009). Interestingly, another monopistho cotylean monogenean, Frurnestinia echeneis, which has only recently been found to colonize farmed sea bream (Mladineo et al 2010), has been genetically identified (mtDNA COI and internal transcribed spacer 1, ITS1, with partial 18S and 5.8S ribosomal DNA) as a shared parasite between farmed and wild sea bream (Mladineo et al in press).…”

Section: Cross-contagion Between Farmed and Neighbouring Wild Fish Stmentioning

confidence: 99%

Reared fish, farmed escapees and wild fish stocks—a triangle of pathogen transmission of concern to Mediterranean aquaculture management

Arechavala-López¹,

Sánchez-Jérez²,

Bayle-Sempere³

et al. 2013

Aquacult. Environ. Interact.

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Although aquaculture in the Mediterranean is a relatively young industry, finfish diseases have been reported to cause considerable problems and mortalities among the farmed stocks. In general, the farming activity and the open design of Mediterranean aquaculture systems allow the transmission of infectious pathogens within and among farm facilities. Fish health and biosecurity programmes at farms have focused on the most obvious pathways for transmission of pathogens, i.e. through transport of infected farmed fish from hatcheries, infected equipment, staff and vessels, as well as through water currents. However, little attention has been devoted to the potential risk of pathogen and disease transmission in Mediterranean open-sea aquaculture through movements of fish. The present study focuses on the importance of considering possible pathogen transmission between reared fish, farmed escapees and farm-aggregated fish when making management decisions.

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Molecular evidence for the lack of transmission of the monogenean Sparicotyle chrysophrii (Monogenea, Polyopisthocotylea) and isopod Ceratothoa oestroides (Crustacea, Cymothoidae) between wild bogue (Boops boops) and cage-reared sea bream (Sparus aurata) and sea bass (Dicentrarchus labrax)

Cited by 35 publications

References 33 publications

Benign effect of the fish parasitic isopod Ceratothoa cf. imbricata on Selenotoca multifasciata (Scatophagidae) from Australia

Benign effect of the fish parasitic isopod Ceratothoa cf. imbricata on Selenotoca multifasciata (Scatophagidae) from Australia

Morphological Plasticity and Phylogeny in a Monogenean Parasite Transferring between Wild and Reared Fish Populations

Reared fish, farmed escapees and wild fish stocks—a triangle of pathogen transmission of concern to Mediterranean aquaculture management

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