The Experts below are selected from a list of 297 Experts worldwide ranked by ideXlab platform
Robby Stoks - One of the best experts on this subject based on the ideXlab platform.
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warming under seminatural outdoor conditions in the Larval Stage negatively affects insect flight performance
Biology Letters, 2018Co-Authors: Nedim Tuzun, Lin Op De Beeck, Ranalison Oliarinony, Marie Van Dievel, Robby StoksAbstract:Laboratory studies indicate global warming may cause changes in locomotor performance directly relevant for fitness and dispersal. Yet, this remains to be tested under seminatural settings, and the connection with warming-induced alterations in the underlying traits has been rarely studied. In an outdoor mesocosm experiment with the damselfly Ischnura elegans , 4°C warming in the Larval Stage decreased the flight muscle mass, which correlated with a lower flight endurance. Warming did not affect body mass, size or wing morphology. This illustrates how carry-over effects of warming under seminatural conditions during early development bridge metamorphosis and negatively impact locomotor performance through changes in a key flight-related trait.
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testing the time scale dependence of delayed interactions a heat wave during the egg Stage shapes how a pesticide interacts with a successive heat wave in the Larval Stage
Environmental Pollution, 2017Co-Authors: Lizanne Janssens, Nedim Tuzun, Robby StoksAbstract:Abstract Under global change organisms are exposed to multiple, potentially interacting stressors. Especially interactions between successive stressors are poorly understood and recently suggested to depend on their timing of exposure. We particularly need studies assessing the impact of exposure to relevant stressors at various life Stages and how these interact. We investigated the single and combined impacts of a heat wave (mild [25 °C] and extreme [30 °C]) during the egg Stage, followed by successive exposure to esfenvalerate (ESF) and a heat wave during the Larval Stage in damselflies. Each stressor caused mortality. The egg heat wave and Larval ESF exposure had delayed effects on survival, growth and lipid peroxidation (MDA). This resulted in deviations from the prediction that stressors separated by a long time interval would not interact: the egg heat wave modulated the interaction between the stressors in the Larval Stage. Firstly, ESF caused delayed mortality only in larvae that had been exposed to the extreme egg heat wave and this strongly depended upon the Larval heat wave treatment. Secondly, ESF only increased MDA in larvae not exposed to the egg heat wave. We found little support for the prediction that when there is limited time between stressors, synergistic interactions should occur. The intermediate ESF concentration only caused delayed mortality when combined with the Larval heat wave, and the lowest ESF concentrations only increased oxidative damage when followed by the mild Larval heat wave. Survival selection mitigated the interaction patterns between successive stressors that are individually lethal, and therefore should be included in a predictive framework for the time-scale dependence of the outcome of multistressor studies with pollutants. The egg heat wave shaping the interaction pattern between successive pesticide exposure and a Larval heat wave highlights the connectivity between the concepts of ‘heat-induced pesticide sensitivity’ and ‘pesticide-induced heat sensitivity’.
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wing shape mediated carry over effects of a heat wave during the Larval Stage on post metamorphic locomotor ability
Oecologia, 2017Co-Authors: Helene Arambourou, Iago Sanmartinvillar, Robby StoksAbstract:Two key insights to better assess the ecological impact of global warming have been poorly investigated to date: global warming effects on the integrated life cycle and effects of heat waves. We tested the effect of a simulated mild (25 °C) and severe (30 °C) heat wave experienced during the Larval Stage on the flight ability of the damselfly Ischnura elegans. To get a mechanistic understanding of how heat stress may translate into reduced post-metamorphic flight ability, we evaluated the hypothesized mediatory role of adult size-related traits, and also tested alternative pathways operating through changes in wing shape and two flight-related traits (both relative fat and flight muscle contents). Exposure to a heat wave, and particularly the severe one, shortened the Larval Stage, reduced adult size-related traits and modified the wing shape but did not significantly affect emergence success, relative fat content and relative flight muscle mass. Notably, the heat wave negatively affected all components of flight ability. Unexpectedly, the heat wave did not reduce flight ability through reducing size. Instead, we identified a novel size-independent mechanism bridging metamorphosis to link Larval environment and adult flight ability in males: through affecting wing shape. The present study advances mechanistic insights in the still poorly understood coupling of life Stages across metamorphosis. Additionally, our results underscore the need for integrative studies across life Stages to understand the impact of global warming.
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increased activity and growth rate in the non dispersive aquatic Larval Stage of a damselfly at an expanding range edge
Freshwater Biology, 2014Co-Authors: Lieven Therry, Evelien Lefevre, Dries Bonte, Robby StoksAbstract:SUMMARY 1. While evolutionary changes in adult traits during range expansion have been recorded in manyspecies, similar changes in the non-dispersive Larval Stage have only rarely been documented.Increased activity in the non-dispersive Larval Stage is an important ecologically relevant trait inaquatic communities that may be expected to evolve in the edge populations (i) as a result of thecombination of spatial sorting in dispersal-related adult activity and a coupling between adult andLarval behaviour and (ii) to meet higher energy demands to allow higher growth rates and a higherinvestment in costly dispersal-related traits.2. We specifically address whether activity is higher in the Larval non-dispersive aquatic Stage at anexpanding range front by comparing larvae of replicated core and edge populations of the damselflyCoenagrion scitulum in three common garden experiments where larvae were reared from the eggStage.3. As expected, activity in the non-dispersive Larval Stage was consistently higher in the edgepopulations. Although changes in Larval activity probably have consequences for ecologicalinteractions, the higher activity was not associated with increased predation rates by dragonflylarvae, potentially because of associated compensatory changes in other antipredator mechanisms.4. We documented one of the few cases of a positive coupling of activity in the Larval and adultStages. Yet, contrary to Larval activity, adult activity did not differ between core and edge popula-tions. This indicates that the higher Larval activity we documented is not shaped by a coupling withadult activity. Instead, our results are consistent with the hypothesis that a higher energy need inedge populations shaped the higher Larval activity. Edge larvae showed a higher growth rate whichis expected to evolve at the initial low population densities in newly founded edge populations.Moreover, higher growth rate showed the expected positive covariation with Larval activity.5. Increases in activity in the non-dispersive Stage in edge populations at an expansion front shouldbe included in the ongoing debate whether evolutionary changes at invasion fronts are driven byadaptive versus non-adaptive evolution. Moreover, they may have the potential to affect ecologicalinteractions at expanding range fronts.Keywords: behavioural coupling, global change, life-history evolution, Odonata, range expansion
Jober Fernando Sobczak - One of the best experts on this subject based on the ideXlab platform.
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a new record of a host parasitoid interaction hymenoepimecis veranii lofredo penteado dias 2009 hymenoptera ichneumonidae parasitizing araneus orgaos levi 1991 araneae araneidae
Journal of Insect Behavior, 2014Co-Authors: Jober Fernando Sobczak, Yuri Fanchini Messas, Hebert Da Silva Souza, Joao VasconcellosnetoAbstract:The genus Hymenoepimecis only occurs in the Neotropics. In some species of this genus, the Larval Stage modifies the behavior of the spider hosts, inducing then to construct a modified web. The wasp Hymenoepimecis veranii has been previously described as an ectoparasitoid of the spider Araneus omnicolor. This study provides detailed information about the natural history of the host-parasitoid interaction involving this wasp with a new host, the spider Araneus orgaos (Araneae: Araneidae), which occurs sympatrically with A. omnicolor.
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A New Record of a Host-Parasitoid Interaction: Hymenoepimecis veranii Lofredo & Penteado-Dias, 2009 (Hymenoptera: Ichneumonidae) Parasitizing Araneus orgaos Levi, 1991 (Araneae: Araneidae)
Journal of Insect Behavior, 2014Co-Authors: Jober Fernando Sobczak, Yuri Fanchini Messas, Hebert Da Silva Souza, João Vasconcellos-netoAbstract:The genus Hymenoepimecis only occurs in the Neotropics. In some species of this genus, the Larval Stage modifies the behavior of the spider hosts, inducing then to construct a modified web. The wasp Hymenoepimecis veranii has been previously described as an ectoparasitoid of the spider Araneus omnicolor. This study provides detailed information about the natural history of the host-parasitoid interaction involving this wasp with a new host, the spider Araneus orgaos (Araneae: Araneidae), which occurs sympatrically with A. omnicolor.
Gonzalo Martinezrodriguez - One of the best experts on this subject based on the ideXlab platform.
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transcriptomic characterization of the Larval Stage in gilthead seabream sparus aurata by 454 pyrosequencing
Marine Biotechnology, 2012Co-Authors: Manuel Yufera, Silke Halm, Sergi Beltran, Berta Fuste, Josep V Planas, Gonzalo MartinezrodriguezAbstract:Gilthead seabream (Sparus aurata) is a teleost belonging to the family Sparidae with a high economical relevance in the Mediterranean countries. Although genomic tools have been developed in this species in order to investigate its physiology at the molecular level and consequently its culture, genomic information on post-embryonic development is still scarce. In this study, we have investigated the transcriptome of a marine teleost during the Larval Stage (from hatching to 60 days after hatching) by the use of 454 pyrosequencing technology. We obtained a total of 68,289 assembled contigs, representing putative transcripts, belonging to 54,606 different clusters. Comparison against all S. aurata expressed sequenced tags (ESTs) from the NCBI database revealed that up to 34,722 contigs, belonging to about 61% of gene clusters, are sequences previously not described. Contigs were annotated through an iterative Blast pipeline by comparison against databases such as NCBI RefSeq from Danio rerio, SwissProt or NCBI teleost ESTs. Our results indicate that we have enriched the number of annotated sequences for this species by more than 50% compared with previously existing databases for the gilthead seabream. Gene Ontology analysis of these novel sequences revealed that there is a statistically significant number of transcripts with key roles in Larval development, differentiation, morphology, and growth. Finally, all information has been made available online through user-friendly interfaces such as GBrowse and a Blast server with a graphical frontend.
Timothy A Linksvayer - One of the best experts on this subject based on the ideXlab platform.
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ant nurse workers exhibit behavioural and transcriptomic signatures of specialization on Larval Stage
Animal Behaviour, 2018Co-Authors: Justin T Walsh, Michael R Warner, Adrian Kase, Benjamin J Cushing, Timothy A LinksvayerAbstract:Division of labour within and between the worker and queen castes is thought to underlie the tremendous success of social insects. Colonies might benefit if subsets of nurse workers specialize further in caring for larvae of a certain Stage or caste, given that Larval nutritional requirements depend on Stage and caste. We used short-term (
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ant nurse workers exhibit behavioral and transcriptomic signatures of specialization on Larval Stage
bioRxiv, 2018Co-Authors: Justin T Walsh, Michael R Warner, Adrian Kase, Benjamin J Cushing, Timothy A LinksvayerAbstract:Division of labor within and between the worker and queen castes is thought to underlie the tremendous success of social insects. Colonies might benefit if subsets of nurse workers specialize further in caring for larvae of a certain Stage or caste, given that Larval nutritional requirements depend on Stage and caste. We used short- (
Manuel Yufera - One of the best experts on this subject based on the ideXlab platform.
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transcriptomic characterization of the Larval Stage in gilthead seabream sparus aurata by 454 pyrosequencing
Marine Biotechnology, 2012Co-Authors: Manuel Yufera, Silke Halm, Sergi Beltran, Berta Fuste, Josep V Planas, Gonzalo MartinezrodriguezAbstract:Gilthead seabream (Sparus aurata) is a teleost belonging to the family Sparidae with a high economical relevance in the Mediterranean countries. Although genomic tools have been developed in this species in order to investigate its physiology at the molecular level and consequently its culture, genomic information on post-embryonic development is still scarce. In this study, we have investigated the transcriptome of a marine teleost during the Larval Stage (from hatching to 60 days after hatching) by the use of 454 pyrosequencing technology. We obtained a total of 68,289 assembled contigs, representing putative transcripts, belonging to 54,606 different clusters. Comparison against all S. aurata expressed sequenced tags (ESTs) from the NCBI database revealed that up to 34,722 contigs, belonging to about 61% of gene clusters, are sequences previously not described. Contigs were annotated through an iterative Blast pipeline by comparison against databases such as NCBI RefSeq from Danio rerio, SwissProt or NCBI teleost ESTs. Our results indicate that we have enriched the number of annotated sequences for this species by more than 50% compared with previously existing databases for the gilthead seabream. Gene Ontology analysis of these novel sequences revealed that there is a statistically significant number of transcripts with key roles in Larval development, differentiation, morphology, and growth. Finally, all information has been made available online through user-friendly interfaces such as GBrowse and a Blast server with a graphical frontend.
