The reproductive response of <i>Cornu aspersum</i> to different hibernation conditions

Çelik, Meryem Yeşim; Dernekbaşı, Seval; Sarıipek, Merve; Karayücel, Sedat

doi:10.1080/13235818.2022.2103891

Cited by 1 publication

(1 citation statement)

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“…Furthermore, producing a high number of offspring can be a bet-hedging strategy that increases the population’s fitness under heat stress (Sergio et al, 2018) or a response to other selective pressures such as predation (Lips, 2001). This trade-off between survival/growth and reproduction is also present in various other species, such as spider mites (Li et al, 2022), fruit flies (Marshall & Sinclair, 2010), and land snails (Çelik et al, 2022). Finally, adaptation to acute thermal stress (higher CTmax values) allows the warm-origin snails to move to cooler (shaded or deeper) areas when the water is directly exposed to the Sahelian sun and the top water layer warms up quickly (Kuo & Sanford, 2009).…”

Section: Discussionmentioning

confidence: 96%

First evidence of a causal link between genetic variation and thermal adaptation in a schistosome host snail

Maes,

Verheyen,

Senghor

et al. 2024

Preprint

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Freshwater snails are pivotal in transmitting schistosomiasis, a tropical parasitic disease affecting over 150 million people. The adaptive potential of these snails is a critical factor in determining how climate change and other environmental factors influence disease transmission dynamics, yet it has remained unexplored.Bulinus truncatusis the schistosome intermediate host snail with the widest geographic distribution and therefore plays a pivotal role in determining the maximum range of urogenital schistosomiasis. In this study, we assessed the local adaptation capacity ofB. truncatusto temperature through an integrative approach encompassing phenotypic, ecophysiological, and genomic data. Ten snail populations from diverse thermal environments were collected in three countries, with eight populations reared in a common garden. The F2 generation (total N= 2592) was exposed to eight chronic temperature treatments and various life-history traits were recorded for over 14 weeks. Subsequently, ecophysiological analyses were conducted on the ten last surviving snails per population. Genotyping the parental generation collected in the field using a genotyping-by-sequencing (GBS) approach, revealed 12,875 single nucleotide polymorphisms (SNPs), of which 4.91 % were potentially under selection. We observed a significant association between these outlier SNPs, temperature, and precipitation. Thermal adaptations in life-history traits were evident, with lower survival rates at high temperatures of warm- origin snails compensated for by higher reproduction rates. Cold-origin snails, on the other hand, exhibited higher growth rates adapted to a shorter growing season. Ecophysiological adaptations included elevated sugar and haemoglobin contents in cold-adapted snails. In contrast, warm-adapted snails displayed increased protein levels but also more oxidative damage. Furthermore, heightened phenoloxidase levels indicated a more robust immune response in snails from parasite-rich regions. The substantial local adaptation capacity ofB. truncatusholds profound implications for its response to climate change, future schistosomiasis risk, and the effectiveness of schistosomiasis control measures.HighlightsLocal adaptation influences species’ responses to climate changeThe snailBulinus truncatusshowed a high thermal local adaptation (LA) potentialLA is apparent through variations in life history and ecophysiological traitsWe identified a significant genetic basis underlying this LALA of the hosts could sustain schistosomiasis transmission under global warming

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