The tapeworm Ligula intestinalis alters the behavior of the fish intermediate host Engraulicypris sardella, but only after it has become infective to the final host

Gabagambi, Nestory P.; Salvanes, Anne-Gro V.; Midtøy, Frank; Skorping, Arne

doi:10.1016/j.beproc.2018.11.002

Cited by 20 publications

(18 citation statements)

References 119 publications

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“…The presence of stretched and salient abdomen in the examined fish was related to the number and size of parasites in their body cavity (Kır et al, 2004;Hoole et al, 2010;Mehraban et al, 2014). Hence Aydoğan et al 2018 stated that infected cyprinid specimens behave differently when compared to others such as swimming closer to the surface, less predation avoidance and losing depth preference, which would make them more vulnerable to predation by avian predators and also less vigilant to escape from deep net (Loot et al, 2002;Gabagambi et al, 2019). Figure 2a and b report the infected L. irideus and the plerocercoids of Ligula sp.…”

Section: Discussionmentioning

confidence: 99%

Occurrence of Ligula sp. plerocercoids in Ladigesocypris irideus (Ladiges, 1960) from SouthWestern Turkey: new host and new locality records

Doosti¹,

Yılmaz²

2020

Iğdır Üniversitesi Fen Bilimleri Enstitüsü Dergisi

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In this study, the occurrence of the tapeworm Ligula cestoda was reported from the body cavity of Anatolian ghizani Ladigesocypris irideus collected from Ula pond, Aegean Region of Turkey in November 2018. Six infected fish were observed having eighteen parasites in total with minimum and maximum lengths of 40.23 mm and 51.79 mm, respectively. The prevalence, mean intensity and abundance of infection were assessed as 42.85%, 3 and 1.28 respectively. This study reports the first record of this endoparasite from Anatolian ghizani, a species endemic to South-Western Turkey. This is also the first record of this parasite from Aegean Region that is an evidence of increasing spread of this group in non-infected parts of Turkey mainly through the forced biological invasion.

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Section: Discussionmentioning

confidence: 99%

Occurrence of Ligula sp. plerocercoids in Ladigesocypris irideus (Ladiges, 1960) from SouthWestern Turkey: new host and new locality records

Doosti¹,

Yılmaz²

2020

Iğdır Üniversitesi Fen Bilimleri Enstitüsü Dergisi

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“…In Lake Nyasa this cestode has been increasingly reported since it was first noted by Mwambungu et al (1996).E. sardella appears to be the only species used as intermediate fish host (Msafiri et al , 2014;Rusuwa et al , 2014;Gabagambi and Skorping, 2018;Gabagambi et al , 2019) Figure S1). L. intestinalis is known to induce castration in several intermediate hosts (Wyatt and Kennedy, 1988;Kennedy et al , 2001;Loot et al , 2002;Cowx et al , 2008;Hoole et al , 2010) and has therefore been suggested to cause population crashes of its host (Burrough et al , 1979;Kennedy et al , 2001).…”

Section: Introductionmentioning

confidence: 95%

Life history shifts in an exploited African fish following invasion by a castrating parasite

Gabagambi¹

2020

Preprint

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Evolutionary theory predicts that infection by a parasite that reduces future host survival or fecundity should select for increased investment in current reproduction. In this study we use the cestode Ligula intestinalis and its intermediate fish host Engraulicypris sardella in Wissman Bay, Lake Nyasa (Tanzania) as a model system. Using data about infection of E. sardella fish hosts by L. intestinalis collected for a period of 10 years, we explored whether parasite infection affects the fecundity of the fish host E. sardella, and whether host reproductive investment has increased at the expense of somatic growth. We found that L. intestinalis had a strong negative effect on the fecundity of its intermediate fish host. For the non-infected fish we observed an increase in relative gonadal weight at maturity over the study period, while size at maturity decreased. These findings suggest that the life history of E. sardella has been shifting towards earlier reproduction. Further studies are warranted to assess whether these changes reflect plastic or evolutionary responses. We also discuss the interaction between parasite and fishery-mediated selection as a possible explanation for the decline of E. sardella stock in the lake. KEYWORDS Life history evolution; African Great Lakes; Lake Nyasa; Usipa; Lake Malawi sardine; Parasite invasion; Environmental change.

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“…In Lake Nyasa, this cestode has been increasingly reported since it was first noted by Mwambungu et al (1996). E. Sardella appears to be the only species used as intermediate fish host (Gabagambi et al, 2019;Gabagambi & Skorping, 2018;Msafiri et al, 2014;Rusuwa et al, 2014) ( Figure S1).…”

Section: Introductionmentioning

confidence: 99%

“…(1996). E. Sardella appears to be the only species used as intermediate fish host (Gabagambi et al., 2019; Gabagambi & Skorping, 2018; Msafiri et al., 2014; Rusuwa et al., 2014) (Figure ).…”

Section: Introductionmentioning

confidence: 99%

Life history shifts in an exploited African fish following invasion by a castrating parasite

Gabagambi

Skorping

Chacha

et al. 2020

Ecology and Evolution

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Life history theory assumes that there are trade-offs between different traits in organisms, such as growth, reproduction, and survival (Roff, 2002). These traits cannot be simultaneously maximized within the same individual because the available amount of nutrients and other resources are in limited supply (Stearns, 1989). Increased resource allocation into one trait will, therefore, come at the cost of reduced allocation into other traits (Agnew et al., 2000). In each given environment, the optimal way to resolve these trade-offs (i.e., the optimal strategy for maximizing fitness) is the one achieving the highest possible reproductive success (

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The tapeworm Ligula intestinalis alters the behavior of the fish intermediate host Engraulicypris sardella, but only after it has become infective to the final host

Cited by 20 publications

References 119 publications

Occurrence of Ligula sp. plerocercoids in Ladigesocypris irideus (Ladiges, 1960) from SouthWestern Turkey: new host and new locality records

Occurrence of Ligula sp. plerocercoids in Ladigesocypris irideus (Ladiges, 1960) from SouthWestern Turkey: new host and new locality records

Life history shifts in an exploited African fish following invasion by a castrating parasite

Life history shifts in an exploited African fish following invasion by a castrating parasite

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