Impact of Late Stage Hypoxic Stimulation and Layer Breeder Age on Embryonic Development, Hatching and Chick Quality DOI Creative Commons
Richard Koblah Agbehadzi,

G Kumi,

Benjamin Adjei‐Mensah

et al.

Poultry Science, Journal Year: 2024, Volume and Issue: 104(2), P. 104691 - 104691

Published: Dec. 24, 2024

The present study examined the effects of breeder age and oxygen (O₂) concentrations during late chorioallantoic membrane (CAM) growth stage on embryo development, hatching dynamics, chick quality, bone mineralization hatchability. A total 1200 eggs from 33- 50-week-old ISA layer breeders, weighing 53.85 g 60.42 average respectively, were incubated at 37.7°C 56 % relative humidity. From embryonic day (ED) 13 to 15, experimental exposed hypoxia (15 or 17 O₂ for 1 hr/day) while control was 21 O₂. Results showed significant interactions (p = 0.040) between level, with embryos 15 exhibiting slower by ED 17. However, weight internal pipping (IP) unaffected > 0.05). At hatch, weights higher in hypoxic groups due increased yolk sac retention 0.024), yolk-free influenced only < 0.001). Hypoxia reduced length, toe tibia parameters 0.05), likely impaired calcium phosphorus absorption. Embryos O

Language: Английский

Proteomic analysis of chick embryonic heart in experimental hypoxia DOI
David Sedmera, Eliška Krejčí, Ondřej Naňka

et al.

Developmental Biology, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 1, 2025

Language: Английский

Citations

0

Narrow Margins: Aerobic Performance and Temperature Tolerance of Coral Reef Fishes Facing Extreme Thermal Variability DOI Creative Commons

Grace O. Vaughan,

Daniel M. Ripley, Matthew D. Mitchell

et al.

Global Change Biology, Journal Year: 2025, Volume and Issue: 31(3)

Published: March 1, 2025

Climate change is driving rising average sea temperatures and the intensification of thermal variability. Tropical coral reef fishes have evolved under thermally stable conditions to function optimally within a narrow temperature range, with many currently living close their upper limits. However, recent work has demonstrated that some species possess additional capacity, such as reductions in basal metabolic rates (i.e., 'plastic floors'), compensate for acute effects challenges when assessed over multigenerational timeframes. In this study, we use floors concrete ceilings' hypothesis generate then test predictions regarding physiology world's hottest most variable ecosystem (southern Arabian/Persian Gulf). By comparing three (Scolopsis ghanam, Ecsenius pulcher Cheilodipterus novemstriatus) from southern Gulf, an annual range 18.0°C-36.5°C, conspecifics nearby but more benign (~21.0°C-32.0°C) reefs Gulf Oman, find enhanced limits broadening performance curves aerobic scope no evidence changes ('plastic floors'). Despite these conserved increases tolerance, summer safety margins were 1.47°C lower than those demonstrating while tolerance tropical somewhat plastic timeframes, its rate likely insufficient keep pace growing variability expected climate change.

Language: Английский

Citations

0

Cardiac mitochondria function in embryonic and 1-year old American alligators, Alligator mississippiensis, is not altered by hypoxic incubation or an acute anoxic challenge DOI

Janna L. Crossley,

Jessica Rippamonti, Dane A. Crossley

et al.

Journal of Comparative Physiology B, Journal Year: 2025, Volume and Issue: unknown

Published: May 4, 2025

Language: Английский

Citations

0

The integrative biology of the heart: mechanisms enabling cardiac plasticity DOI
William Joyce, Holly A. Shiels, Craig E. Franklin

et al.

Journal of Experimental Biology, Journal Year: 2024, Volume and Issue: 227(20)

Published: Oct. 15, 2024

Cardiac phenotypic plasticity, the remodelling of heart structure and function, is a response to any sustained (or repeated) stimulus or stressor that results in change performance. plasticity can be either adaptive (beneficial) maladaptive (pathological), depending on nature intensity stimulus. Here, we draw articles published this Special Issue Journal Experimental Biology, from broader comparative physiology literature, highlight core components enable cardiac including structural remodelling, excitation-contraction coupling metabolic rewiring. We discuss when how these changes occur, with focus underlying molecular mechanisms, regulation gene transcription by epigenetic processes post-translational modifications proteins. Looking future, anticipate growing use -omics technologies integration traditional approaches will allow researchers continue uncover vast scope for function across animals.

Language: Английский

Citations

1

Impact of Late Stage Hypoxic Stimulation and Layer Breeder Age on Embryonic Development, Hatching and Chick Quality DOI Creative Commons
Richard Koblah Agbehadzi,

G Kumi,

Benjamin Adjei‐Mensah

et al.

Poultry Science, Journal Year: 2024, Volume and Issue: 104(2), P. 104691 - 104691

Published: Dec. 24, 2024

The present study examined the effects of breeder age and oxygen (O₂) concentrations during late chorioallantoic membrane (CAM) growth stage on embryo development, hatching dynamics, chick quality, bone mineralization hatchability. A total 1200 eggs from 33- 50-week-old ISA layer breeders, weighing 53.85 g 60.42 average respectively, were incubated at 37.7°C 56 % relative humidity. From embryonic day (ED) 13 to 15, experimental exposed hypoxia (15 or 17 O₂ for 1 hr/day) while control was 21 O₂. Results showed significant interactions (p = 0.040) between level, with embryos 15 exhibiting slower by ED 17. However, weight internal pipping (IP) unaffected > 0.05). At hatch, weights higher in hypoxic groups due increased yolk sac retention 0.024), yolk-free influenced only < 0.001). Hypoxia reduced length, toe tibia parameters 0.05), likely impaired calcium phosphorus absorption. Embryos O

Language: Английский

Citations

0