A Cost of Increased Early Reproductive Effort in the Snail Biomphalaria glabrata

Minchella, Dennis J.; LoVerde, Philip T.

doi:10.1086/283879

Cited by 302 publications

(275 citation statements)

References 9 publications

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“…The reproductive performance of the field population was at its lowest during the patent phase of the infection. This pattern supports the data in the literature, which indicate that there is a greater investment in reproduction during the first weeks of infection (the pre-patent phase) and that reproduction declines until castration of the intermediate host occurs 1,5,10,11 .…”

Section: Discussionsupporting

confidence: 91%

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The effects of the experimental infection from a focus of transmission of Schistosoma mansoni in a population of Biomphalaria tenagophila (D'Orbigny, 1835) in the region of "Vale do Ribeira de Iguape", Brazil

Guimaraes¹,

Muniz²,

Takahashi³

et al. 2010

Rev. Inst. Med. trop. S. Paulo

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SUMMARYTo observe the effects of the parasitic infection on the biology of B. tenagophila, field and laboratory populations of this mollusk from Itariri, in Vale do Ribeira, Brazil, were experimentally infected. Each mollusk received 10 miracidia of Schistosoma mansoni (SJ lineage) and was observed throughout the parasite's development. The biological variables were compared according to the criteria "group" and "infectious phase". The main damage caused by the parasitic infection manifested itself in reproduction, longevity and lesions on the shell of the mollusks in the patent phase. An infection rate of 58.8% was observed. Microanatomical study of the mollusk's digestive gland and ovotestis revealed the presence of evolving larval forms and cercariae. It was concluded that the effects of the parasitic infection on both populations were moderate, despite the low survival rate of the infected mollusks, the damage did not prevent either reproduction or the elimination of cercariae, which continued for a long time.

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Section: Discussionsupporting

confidence: 91%

“…In B. glabrata, for instance, castration can be caused by sporocysts of S. mansoni, resulting in the suppression of egg production or the production of malformed eggs. Parasitic infections can also affect mollusk growth and survival 1,2,10,11,17,22 .…”

Section: Introductionmentioning

confidence: 99%

The effects of the experimental infection from a focus of transmission of Schistosoma mansoni in a population of Biomphalaria tenagophila (D'Orbigny, 1835) in the region of "Vale do Ribeira de Iguape", Brazil

Guimaraes¹,

Muniz²,

Takahashi³

et al. 2010

Rev. Inst. Med. trop. S. Paulo

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show abstract

Section: Introductionmentioning

confidence: 99%

“…This "benefit" can be either in the form of enhanced host fecundity (Minchella and LoVerde, 1981;Minchella, 1985) or reduced host age at maturity (Lafferty, 1993). However, these benefits are typically offset by a pathogenic effect later in life [e.g., reduction of fecundity or even castration (Minchella and LoVerde, 1981)]. Therefore, increasing early reproduction or reducing age at maturity can be considered a strategy which helps parasitised hosts to temper the negative impact of parasite infection (Minchella, 1985).…”

Section: Introductionmentioning

confidence: 99%

Effects of maternal parasite load on offspring life‐history traits in the common lizard (Lacerta vivipara)

Sorci

Clobert

1995

J of Evolutionary Biology

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We studied the effect of maternal ectoparasite load (measured at parturition) on the life-history traits of the offspring of the host Lacerta vivipara, the European common lizard. The ectoparasite, a mite belonging to the family Laelapidae, had a detrimental effect on its host: parasite load was associated with increased host mortality, and was negatively correlated with host body mass. Parasite load was persistent over time, suggesting that parasite load can be predictable. Offspring of highly parasitised mothers had higher values of several fitness components early in life than offspring of parasite-free mothers or lightly infested mothers. This was expressed in terms of increased F, yearling growth rate, and reproductive investment at first reproduction (measured as F2 hatchling mass). These results are interpreted as a host adaptation to attenuate the impact of parasites. Indeed, if high parasite loads arise from long exposure time to a constant population of parasites, and if the negative effects of parasites are additive over time, hosts could reduce the impact of parasites simply by investing more during the earlier stages of life. Naturally, having better performance early in life should lead to higher mortality rates and/or lower fecundity later in life.

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“…Experiments in which presentation of PAMPs to the protostome immune system has been claimed to 'prime' the immune system, measure not immune parameters, as might be expected, but survival, (5) temporary increases in growth (34,35) or reproductive capacity. (8,36) Thus it is peremptory to then invoke 'adaptivity' by way of explanation for any positive outcomes observed.…”

mentioning

confidence: 99%

Adaptive immunity in invertebrates: A straw house without a mechanistic foundation

2007

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SummaryRecently claims have been made for radical new insights in the field of invertebrate immunology that involve memory, specificity and/or maternal transfer of immunocompetence. For evidence these claims rely on phenomena, such as survival or reproductive capacity, observed at the level of the whole organism. The allure of these apparently revelatory hypotheses is that they are contrary to established views of innate immunity. They draw implicit analogy to adaptive responses in jawed vertebrates and the terminology used creates an incomplete and misleading picture. We argue that the case for adaptive immunity in invertebrates based only on such phenomena is weak and flawed, as it can only be upheld if supported by descriptions of the underlying mechanisms. We caution against a reliance on this approach as a means of advancing this field-highlighting, as an example, some negative commercial implications of adopting this approach.

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A Cost of Increased Early Reproductive Effort in the Snail Biomphalaria glabrata

Cited by 302 publications

References 9 publications

The effects of the experimental infection from a focus of transmission of Schistosoma mansoni in a population of Biomphalaria tenagophila (D'Orbigny, 1835) in the region of "Vale do Ribeira de Iguape", Brazil

The effects of the experimental infection from a focus of transmission of Schistosoma mansoni in a population of Biomphalaria tenagophila (D'Orbigny, 1835) in the region of "Vale do Ribeira de Iguape", Brazil

Effects of maternal parasite load on offspring life‐history traits in the common lizard (Lacerta vivipara)

Adaptive immunity in invertebrates: A straw house without a mechanistic foundation

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