Sex‐ and time‐specific parental effects of warming on reproduction and offspring quality in a coral reef fish

Evolutionary Applications, Journal Year: 2020, Volume and Issue: 14(4), P. 1145 - 1158

Published: Dec. 18, 2020

Global warming can disrupt reproduction or lead to fewer and poorer quality offspring, owing the thermally sensitive nature of reproductive physiology. However, phenotypic plasticity may enable some animals adjust thermal sensitivity maintain performance in warmer conditions. Whether elevated temperature affects depend on timing exposure sex parent exposed. We exposed male female coral reef damselfish (

Language: Английский

---

Transcriptional flexibility during thermal challenge corresponds with expanded thermal tolerance in an invasive compared to native fish

Evolutionary Applications, Journal Year: 2020, Volume and Issue: 14(4), P. 931 - 949

Published: Nov. 21, 2020

Abstract Capacity to cope with warming temperatures is a key determining factor of species' persistence under global climate change. Many successful invasive species have heightened thermal tolerance relative their native counterparts, which may provide competitive advantages for habitat utilization and resource acquisition scenarios, ultimately contributing radically altered community composition. Enhanced transcriptional plasticity be an important conferring superior abilities environmental stress, but the molecular mechanisms driving differences organismal traits in versus are not well known. Although it predicted that established invaders will evolve canalized phenotypes well‐adapted new environments, clear whether same expectations true variable environments or scenarios where fluctuating increasing fitness advantages. Here, we compare highly fish sympatric endangered living dynamic estuarine environment projected warm We linked physiological limits responses at multiple common absolute temperature thresholds determined Inland Silversides ( Menidia beryllina ) associated changes greater both number genes magnitude response Delta Smelt Hypomesus transpacificus ). Modulated contributed enrichment biological processes differed between generally increased temperature. These results concordance hypothesis play role population persistence, interactions, shaping assemblages Future studies encompassing wider range taxa needed determine this general pattern found more broadly.

Language: Английский

---

Molecular Response of the Brain to Cross-Generational Warming in a Coral Reef Fish

Frontiers in Marine Science, Journal Year: 2022, Volume and Issue: 9

Published: March 4, 2022

Ocean warming is a threat to marine biodiversity, as it can push species beyond their physiological limits. Detrimental effects occur when poikilotherms are exposed conditions thermal optima. However, acclamatory mechanisms, such plasticity, may enable compensation of detrimental if experienced during development or across generations. Studies evaluating the molecular responses fishes have mostly focused on liver, muscle, and gonads, little known about other vital organs, including brain. This study evaluated transcriptional program brain in coral reef fish Acanthochromis polyacanthus , two different scenarios: +1.5°C +3.0°C, successive Fish were these both developmental (F1 F2) transgenerational settings (F2 only), well treatment with step-wise between The largest differences gene expression individuals first second generation, pattern that was corroborated by pairwise comparisons Control F1 F2 (7,500 DEGs) fish. large difference could be associated parental effects, parents generation collected from wild, whereas reared captivity. A general response observed at temperatures treatments included protein folding, oxygen transport (i.e., myoglobin), apoptosis cell death, modification cellular structure, mitochondrial activity, immunity changes circadian regulation. Treatments highest temperature showed reduction synaptic activity neurotransmission, which matches previous behavioral observations fishes. Transgenerational +3.0°C significant activation pls3 for neuro-muscular junctions under heat-stress. samples an intermediate response, few differentially expressed genes compared groups (except +1.5°C). In combination studies liver expression, this indicates produces signature stress A. influenced intensity duration exposure.

Language: Английский

---

Long non‐coding RNAs mediate fish gene expression in response to ocean acidification

Evolutionary Applications, Journal Year: 2024, Volume and Issue: 17(2)

Published: Feb. 1, 2024

Abstract The majority of the transcribed genome does not have coding potential but these non‐coding transcripts play crucial roles in transcriptional and post‐transcriptional regulation protein‐coding genes. Regulation gene expression is important shaping an organism's response to environmental changes, ultimately impacting their survival persistence as population or species face global change. However, long RNAs (lncRNAs), when confronted with remain largely unclear. To explore role lncRNAs fish exposed ocean acidification (OA), we analyzed publicly available brain RNA‐seq data from a coral reef Acanthochromis polyacanthus . We annotated its examined changes intergenic (lincRNAs) between A. samples natural CO 2 seep nearby control site. identified 4728 lncRNAs, including 3272 lincRNAs this species. Remarkably, 93.03% were species‐specific. Among 125 highly expressed 403 differentially elevated , observed that either neighboring potentially trans‐regulating genes associated pH regulation, neural signal transduction, ion transport, which are known be OA fish. In summary, may facilitate acclimation mediate responses by modulating genes, offers insight into regulatory mechanisms underlying changes.

Language: Английский

---

Common‐garden experiment reveals outbreeding depression and region‐of‐origin effects on reproductive success in a frequently translocated tortoise

Animal Conservation, Journal Year: 2024, Volume and Issue: unknown

Published: Aug. 12, 2024

Abstract Human‐mediated animal movement can expose wildlife populations to novel environments. Phenotypic plasticity buffer against the challenges presented by environments, while adaptation local ecosystems may limit resilience in ecosystems. Outbreeding depression during mixing of disparate gene pools also reduce reproductive success after long‐distance movement. Here, we use a ‘common‐garden’ population gopher tortoises ( Gopherus polyphemus ), translocated from numerous sites across state Florida, USA, mitigation site north‐west (panhandle) region assess whether geographic origin, outbreeding effects, and behavioral influence this threatened keystone species. We found that females north‐east Florida produced clutches with lower hatching than other regions. detected regional differentiation nest selection behavior common environment translocation site, though these differences did not mediate effect on success. evidence for depression: declined increasing parental genetic distances, dropping 93% 67% range observed distances. Together, results suggest newly admixed suffer costs due historical differentiation, undetected could significantly hamper conservation efforts species others undergoing variety human‐mediated movements.

Language: Английский

---