Infestation of zooplankton with Triaenophorus and Proteocephalus procercoids (Cestoda) in a deep oligotrophic lake

Anegg, Peter; Psenner, Roland; Tartarotti, Barbara

doi:10.4081/jlimnol.2014.1021

Cited by 2 publications

(4 citation statements)

References 30 publications

(60 reference statements)

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“…In fact, pelagic and benthic C. lavaretus of Achensee had similar T. crassus burdens, which reinforces the argument of Petersson (1971) that water-level fluctuations may favour a shift from benthic to planktonic feeding behaviour. Nevertheless, Gassner & Achleitner (2006) and our own observations in 2011 illustrate that the vast majority of C. lavaretus in Achensee reside in the pelagic zone and thus mainly utilize crustacean zooplankton (Schulz, 1979; Anegg et al , 2014). It remains unclear to what extent the water-level fluctuations enhance the degree of plankton feeding and the risk of T. crassus infection.…”

Section: Discussionmentioning

confidence: 87%

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Infection levels of plerocercoids of the tapewormTriaenophorus crassusand feeding strategy in two fish species from the ultra-oligotrophic Lake Achensee, Austria

Schähle¹,

Medgyesy

Psenner

2014

J. Helminthol.

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Thus far, high burdens of Triaenophorus crassus plerocercoids have been reported only in old age groups of coregonid and salmonid fishes. Here we show heavy infection with T. crassus in young whitefish Coregonus lavaretus in the ultra-oligotrophic and regulated Achensee in Tyrol, Austria. Prevalence of T. crassus on C. lavaretus was 100% in all age groups and abundance significantly increased with fish age. The mean annual accumulation of T. crassus was 5.2 parasites in 0- to 7-year-old C. lavaretus, and 2-year-old specimens already harboured a mean of 19.4 plerocercoids. In Arctic charr Salvelinus umbla, however, the prevalence of T. crassus was less than 16% and the majority of infected fish contained only one or two plerocercoids. Triaenophorus nodulosus was present neither in C. lavaretus nor in S. umbla. We assume that the heavy T. crassus infection in C. lavaretus is largely related to their zooplankton-dominated diet and to the characteristics of Achensee, while habitat choice and feeding strategy of the S. umbla population are seen to be the main reasons for their low burdens of T. crassus.

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Section: Discussionmentioning

confidence: 87%

“…This time slot was selected because in Achensee copepods are infected by Triaenophorus spp. between June and the beginning of August (Anegg et al , 2014). The detected procercoids in August were most likely T. nodulosus (with respect to the findings of Miller (1945a), Lahnsteiner et al (2009) and Sichrowsky et al (2013)).…”

Section: Discussionmentioning

confidence: 99%

Infection levels of plerocercoids of the tapewormTriaenophorus crassusand feeding strategy in two fish species from the ultra-oligotrophic Lake Achensee, Austria

Schähle¹,

Medgyesy

Psenner

2014

J. Helminthol.

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“…The abundance of copepod transmitted parasites in charr in general was positively correlated to fish length. Increases in parasite abundance with body size are common (Bell & Burt 1991;Poulin 1995Poulin , 2000Poulin , 2004Valtonen et al 2010;Poulin & Leung 2011;Timi et al 2011;Timi & Lanfranchi 2013;Anegg et al 2014). Larger hosts provide a greater diversity of niches, more space for parasites (Poulin 1995;Poulin & Leung 2011), and consume more potentially infected food (Poulin 1997).…”

Section: Discussionmentioning

confidence: 99%

“…Parasite abundance is also influenced by the age of the host (Khan 2012), as longevity provides a more stable habitat for parasites and allows for accumulation of parasites over time (Bell & Burt 1991). Increasing host body size also increases parasite abundance (e. g. Poulin 2000Poulin , 2004Valtonen et al 2010;Timi & Lanfranchi 2013;Anegg et al 2014). Larger hosts provide a greater diversity of niches and more space for parasites (Poulin 1995;Poulin & Leung 2011), as well as they consume more food, increasing the chance of contracting a parasite infection (Poulin 1997).…”

Section: Introductionmentioning

confidence: 99%

Factors determining parasite abundance in European perch, Perca fluviatilis, European whitefish, Coregonus lavaretus, and Arctic charr, Salvelinus alpinus, in an oligotrophic lake, southern Norway

et al. 2020

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Time and spatial variations in macroparasite status were investigated in European perch, Perca fluviatilis, European whitefish, Coregonus lavaretus, and Arctic charr, Salvelinus alpinus in Lake Norsjø (Southern Norway), based on gillnet fishing in three locations in the spring, summer, and fall 2018. In addition, length, weigth, age, sex, δ13C, and δ15N were determined. Parasite abundance was modelled using negative binomial generalized linear models in relation to fish metrics, season, and sampling location. The most prevalent parasite species were determined by the diet and habitat of the host. European perch was mainly infected by acanthocephalans, European whitefish mainly infected by acanthocephalans and cestodes, and Arctic charr mainly infected by cestodes. The most prevalent parasites in European perch are transmitted by benthic animals. Parasites in European whitefish are transmitted by both benthic animals and copepods, while the most prevalent parasites in Arctic charr are copepod transmitted. This corresponds well with the δ13C signatures in the three species, indicating that European perch primarily fed in the littoral zone (δ13C: -24.9 ± 2.5 ‰), Arctic charr in the pelagic and profundal zone (δ13C: -29.4 ± 1.1 ‰), while European whitefish both fed in the littoral and pelagic zone (δ13C: -28.3 ± 2.3 ‰) of Lake Norsjø. Individual abundances of parasites depended on host age, length, sex, δ15N, and season. Positive correlations between parasite abundance and host age, length, or trophic level measured as δ15N were most common, and occurred in all three host species. Many parasites accumulate with age, and larger hosts provide more diverse habitats for parasites.

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Infestation of zooplankton with Triaenophorus and Proteocephalus procercoids (Cestoda) in a deep oligotrophic lake

Abstract: In

Cited by 2 publications

References 30 publications

Infection levels of plerocercoids of the tapewormTriaenophorus crassusand feeding strategy in two fish species from the ultra-oligotrophic Lake Achensee, Austria

Infection levels of plerocercoids of the tapewormTriaenophorus crassusand feeding strategy in two fish species from the ultra-oligotrophic Lake Achensee, Austria

Factors determining parasite abundance in European perch, Perca fluviatilis, European whitefish, Coregonus lavaretus, and Arctic charr, Salvelinus alpinus, in an oligotrophic lake, southern Norway

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