scholarly journals An experimental heat wave changes immune defense and life history traits in a freshwater snail

2013 ◽  
Vol 3 (15) ◽  
pp. 4861-4871 ◽  
Author(s):  
Katja Leicht ◽  
Jukka Jokela ◽  
Otto Seppälä
Keyword(s):  
Life History ◽  
Heat Wave ◽  
Life History Traits ◽  
Freshwater Snail ◽  
Immune Defense ◽  
Experimental Heat

The influence of self-fertilization and pairing on life-history traits in the freshwater snail Bulinus forskalii (Gastropoda, Planorbidae)

Acta Tropica ◽  
2000 ◽  
Vol 76 (2) ◽  
pp. 159-167 ◽  
Author(s):  
Flobert Njiokou ◽  
Jean Bosco Mouafo ◽  
Félicité Teukeng ◽  
Thomas Njine ◽  
Albert Same Ekobo ◽  
...  
Keyword(s):  
Life History ◽  
Life History Traits ◽  
Freshwater Snail ◽  
Self Fertilization

scholarly journals Inbreeding does not alter the response to an experimental heat wave in a freshwater snail

PLoS ONE ◽  
2019 ◽  
Vol 14 (8) ◽  
pp. e0220669 ◽  
Author(s):  
Katja Leicht ◽  
Jukka Jokela ◽  
Otto Seppälä
Keyword(s):  
Heat Wave ◽  
Freshwater Snail ◽  
Experimental Heat

Life-history traits buffer against heat wave effects on predator-prey dynamics in zooplankton

2018 ◽  
Vol 24 (10) ◽  
pp. 4747-4757 ◽  
Author(s):  
Huan Zhang ◽  
Pablo Urrutia-Cordero ◽  
Liang He ◽  
Hong Geng ◽  
Fernando Chaguaceda ◽  
...  
Keyword(s):  
Life History ◽  
Heat Wave ◽  
Life History Traits ◽  
Predator Prey ◽  
Wave Effects

scholarly journals Effects of Simulated Heat Waves on Life History Traits of a Host Feeding Parasitoid

Insects ◽  
2019 ◽  
Vol 10 (12) ◽  
pp. 419
Author(s):  
Yi-Bo Zhang ◽  
An-Pei Yang ◽  
Gui-Fen Zhang ◽  
Wan-Xue Liu ◽  
Fang-Hao Wan
Keyword(s):  
Life History ◽  
Heat Wave ◽  
Life History Traits ◽  
Heat Waves ◽  
Wave Pattern ◽  
Future Climate Change ◽  
Host Feeding ◽  
Short Term ◽  
High Frequencies ◽  
Low Amplitude

The frequency and amplitude of heat waves are predicted to increase under future climate change conditions. We still lack a detailed understanding of how changes in the frequency and amplitude of heat waves are linked to the life history traits and biocontrol efficiency of host-feeding parasitoids. In the present study, we simulated a series of heat waves as a function of amplitude and frequency to investigate the effects on the life history traits of the host-feeding parasitoid Eretmocerus hayati. We found that both the amplitude and frequency of heat waves significantly affected the adult phenotypes. In the low-amplitude heat wave group, the frequency of heat waves did not change the life history traits of the parasitoid; however, when the heat amplitude reached 42 °C, medium (four times/week) and high frequencies (seven times/week) of heat waves detrimentally affected these parameters. Hence, these findings suggest that to obtain optimal biological control with this parasitoid, we need to carefully monitor heat wave pattern (especially the amplitude and frequency) over the short term (usually 7–10 days) before releasing a host-feeding parasitoid.

scholarly journals Do Life History Traits Influence Patterns of Maternal Immune Elements in New World Blackbirds (Icteridae)?

2018 ◽  
Vol 1 (1) ◽  
Author(s):  
C A Fassbinder-Orth ◽  
L D Igl ◽  
D C Hahn ◽  
K M Watts ◽  
T E Wilcoxen ◽  
...  
Keyword(s):  
Life History ◽  
Body Size ◽  
Immune Responses ◽  
Life History Traits ◽  
New World ◽  
Bird Species ◽  
Immune Defense ◽  
Closely Related Species ◽  
Brood Parasites ◽  
Comparative Immunity

Abstract Avian immunology developed originally by investigating domesticated poultry species (Galliformes), but in recent decades eco-immunological studies of wild bird species have revealed that avian immune systems are more diverse than initially assumed. This study compares six immunological elements in eggs of six species within the same family, the New World blackbirds (Icteridae),whose members differ most notably in two life history parameters, brood parasitism and body size. We measured the maternal immune investment of passive immune components in both yolk and albumen: lysozyme, ovotransferrin, and immunoglobulins (Igs), and LPS-specific Igs. We predicted that brood parasites would have higher levels of immune activity for both innate and adaptive immunity compared with non-brood parasites, and that increased body size could increase microbial exposure of larger animals, resulting in an increase in some adaptive immune responses, such as LPS-specific Igs. We found that brood parasites had significantly higher levels of Igs and lysozyme levels in albumen, but significantly lower levels of Igs in yolk compared with non-brood parasites. Igs in yolk scaled according to body size, with the smallest organisms (the brood parasites) having the lowest levels, and the largest organism (common grackle) having the highest. Our results confirm the findings of other studies of comparative immunity among species in a single taxon that (1) similarities in immune investment cannot be assumed among closely related species and (2) single measures of immune defense cannot be assumed to be indicators of a species’ overall immune strategy, as life history traits can differentially affect immune responses.

scholarly journals Life history traits of the exotic freshwater snail Melanoides tuberculata Müller, 1774 (Gastropoda, Thiaridae), and its sensitivity to common stressors in freshwaters

2020 ◽  
Vol 32 ◽  
Author(s):  
Denise Tieme Okumura ◽  
Odete Rocha
Keyword(s):  
Life History ◽  
Growth Curve ◽  
Life History Traits ◽  
Freshwater Snail ◽  
Individual Growth ◽  
Toxic Substances ◽  
Melanoides Tuberculata ◽  
Laboratory Conditions ◽  
Individual Growth Curve ◽  
The Individual

Abstract: Aim In the present study has analyzed several aspects of the life history traits of Melanoides tuberculata, an exotic species, under laboratory conditions, and its response to some stressors has also been applied. Methods Sensitivity to two toxic substances was tested. The mollusks were collected and cultured in the laboratory under controlled conditions of temperature of 25 ± 1 °C and ad libitum food regime. Growth rates and biomass were experimentally obtained and the individual growth curve obtained. Results The experiment lasted 287 days and the maximum shell lengths registered was 11.67 mm. The growth curve indicated a rate of 3.98 year-1 and a maximum theoretical length of 10.61 mm. The mean post-embrionary development time until first reproduction was 275 days and the size of the primipara was 10.13 mm. An accelerated growth of juveniles was observed with fast increase in the shell length until sexual maturity, but growth rate decreased afterwards as more energy was devoted to reproduction. Under the combination of 25 °C and fed on alternate days, M. tuberculata had a slow growth and a long-life expectancy under laboratory conditions. The tolerance of this mollusk to temperature as a stressor ranged between 16 °C and 37 °C, being the optimum temperature situated between 29 °C and 34 °C. The LC(I)50-24h for reference substances were: 0.70 g L-1 for KCl and 9.05 g L-1 for NaCl. Conclusion Based on these results, we can conclude that M. tuberculata is a species tolerant to temperature and salinity, what partially explains to accordance to its wide and rapid dispersion throughout tropical waters.

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