Parasitic worms of fish

Williams, Huw; Jones, A.

doi:10.1590/s0036-46651994000600016

Cited by 77 publications

(40 citation statements)

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“…In contrast, Cone & Anderson (1977) provided some evidence that heavy infections of larval gryporhynchid parasites in the livers of pumpkinseed, Lepomis gibbosus L., were capable of mortality. Furthermore, it is well documented that heavy infections of other larval tapeworms can cause significant liver pathology, leading to host debilitation and even death (Williams & Jones, 1994).…”

Section: Discussionmentioning

confidence: 99%

Larval gryporhynchid tapeworms (Cestoda: Cyclophyllidea) of British freshwater fish, with a description of the pathology caused byParadilepis scolecina

et al. 2011

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Larvae of the cyclophyllidean tapeworms Paradilepis scolecina (Rudolphi, 1819), Neogryporhynchus cheilancristrotus (Wedl, 1855) and Valipora campylancristrota (Wedl, 1855), are described from British freshwater fish. The morphometrics of the rostellar hooks, infection characteristics and host ranges of these parasites from fisheries in England and Wales are presented. Difficulties in the detection, handling and identification of these tapeworms are highlighted, and may in part explain the paucity of records from Britain. Tissue digestion was shown to be a useful technique for the examination of these parasites, providing clear and consistent preparations of the rostellar hooks for measurement. The pathological changes caused by P. scolecina to the liver of wild tench, Tinca tinca, are detailed for the first time. Tapeworms located in the hepatic parenchyma and pancreatic tissues caused little pathological damage and invoked only mild inflammatory responses. The small size of these tapeworms and their encapsulation within host tissues appear to limit the severity of pathology, compared with parasites that insert their rostellum during attachment.

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Section: Discussionmentioning

confidence: 99%

Larval gryporhynchid tapeworms (Cestoda: Cyclophyllidea) of British freshwater fish, with a description of the pathology caused byParadilepis scolecina

et al. 2011

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“…Williams & Jones 1994;Musselman & Press 1995;Cleaveland et al 2001;Taylor et al 2001;Pedersen et al 2005), with recent work suggesting that such generalist parasites may even have evolved from host specialists ). Consequently, the impact of multiple host backgrounds on parasite transmission and virulence will be key to gaining a true understanding of host-parasite evolution.…”

Section: Host Assemblages: From Theory To Incomplete Empirical Studiesmentioning

confidence: 99%

Parasite and host assemblages: embracing the reality will improve our knowledge of parasite transmission and virulence

2010

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Interactions involving several parasite species (multi-parasitized hosts) or several host species (multi-host parasites) are the rule in nature. Only a few studies have investigated these realistic, but complex, situations from an evolutionary perspective. Consequently, their impact on the evolution of parasite virulence and transmission remains poorly understood. The mechanisms by which multiple infections may influence virulence and transmission include the dynamics of intrahost competition, mediation by the host immune system and an increase in parasite genetic recombination. Theoretical investigations have yet to be conducted to determine which of these mechanisms are likely to be key factors in the evolution of virulence and transmission. In contrast, the relationship between multi-host parasites and parasite virulence and transmission has seen some theoretical investigation. The key factors in these models are the trade-off between virulence across different host species, variation in host species quality and patterns of transmission. The empirical studies on multi-host parasites suggest that interspecies transmission plays a central role in the evolution of virulence, but as yet no complete picture of the phenomena involved is available. Ultimately, determining how complex host-parasite interactions impact the evolution of host-parasite relationships will require the development of cross-disciplinary studies linking the ecology of quantitative networks with the evolution of virulence.

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“…Many studies have shown that acanthocephalans usually do not cause serious effects on the fish development in natural environments (Hine & Kennedy, 1974;Mayian, 1990;Williams & Jones, 1994;Ontaka, 2002). However, the tambaqui fish raised in an intensive production system in the State of Amazonas presented massive infections by acanthocephalan parasites.…”

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confidence: 99%

The impact of Neoechinorhynchus buttnerae (Golvan, 1956) (Eoacanthocephala: Neochinorhynchidae) outbreaks on productive and economic performance of the tambaqui Colossoma macropomum (Cuvier, 1818), reared in ponds

Silva-Gomes

Coelho-Filho

Viana-Silva

et al. 2017

lajar

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ABSTRACT. This study evaluates the impact of Neoechinorhynchus buttnerae on the productive and economic performance of "tambaqui" reared in ponds. Two fish farms were selected, one with infected fish (IF) and the other with non-infected fish (NIF). Biometry, age, initial weight and handling data were collected from each studied specimen. Our results show that IF presented lower weight, evident loss of body mass and body deformities, reflecting on a condition factor 300% smaller than NIF. Infection by acanthocephalans caused an impact bigger than 200% on growth and affected the gross income directly, resulting in a difference higher than 1000% between IF and NIF farms. We conclude that this impact could be even greater if we consider both income decrease and raising production costs due to the parasite infection.

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Parasitic worms of fish

Cited by 77 publications

References 0 publications

Larval gryporhynchid tapeworms (Cestoda: Cyclophyllidea) of British freshwater fish, with a description of the pathology caused byParadilepis scolecina

Larval gryporhynchid tapeworms (Cestoda: Cyclophyllidea) of British freshwater fish, with a description of the pathology caused byParadilepis scolecina

Parasite and host assemblages: embracing the reality will improve our knowledge of parasite transmission and virulence

The impact of Neoechinorhynchus buttnerae (Golvan, 1956) (Eoacanthocephala: Neochinorhynchidae) outbreaks on productive and economic performance of the tambaqui Colossoma macropomum (Cuvier, 1818), reared in ponds

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