Acute exposure to hyperthermic oscillating temperatures during pre-incubation influences northern bobwhite development, hatching, and survival

Reyna, Kelly S.

doi:10.1371/journal.pone.0219368

Cited by 9 publications

(4 citation statements)

References 25 publications

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“…The predicted age at hatch of around 20 days matches the average incubation duration of 23 days at 37.5 \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{upgreek} \usepackage{mathrsfs} \setlength{\oddsidemargin}{-69pt} \begin{document} }{}$^{\circ }$\end{document} C–38.5 \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{upgreek} \usepackage{mathrsfs} \setlength{\oddsidemargin}{-69pt} \begin{document} }{}$^{\circ }$\end{document} C ( Green & Vince, 1973 , Kato et al , 2013 , 2014 , Reyna, 2019 , Reyna & Burggren, 2017 , Walter & Voitle, 1973 ). Predicted wet weight at hatch of 6.7 g is only 3.5% larger compared with the data used for parameterizing the model (Table 3 ) and is close to the average hatching mass (6–6.5 g; Brennan et al , 2020 , Walter & Voitle, 1973 ).…”

Section: Discussionmentioning

confidence: 99%

Energetic basis for bird ontogeny and egg-laying applied to the bobwhite quail

Marn

Lika

Augustine

et al. 2022

Conservation Physiology

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Birds build up their reproductive system and undergo major tissue remodeling for each reproductive season. Energetic specifics of this process are still not completely clear, despite the increasing interest. We focused on the bobwhite quail — one of the most intensely studied species due to commercial and conservation interest — to elucidate the energy fluxes associated with reproduction, including the fate of the extra assimilates ingested prior to and during reproduction. We used the standard Dynamic Energy Budget model, which is a mechanistic process-based model capable of fully specifying and predicting the life cycle of the bobwhite quail: its growth, maturation and reproduction. We expanded the standard model with an explicit egg-laying module and formulated and tested two hypotheses for energy allocation of extra assimilates associated with reproduction: Hypothesis 1, that the energy and nutrients are used directly for egg production; and Hypothesis 2, that the energy is mostly spent fueling the increased metabolic costs incurred by building up and maintaining the reproductive system and, subsequently, by egg-laying itself. Our results suggest that Hypothesis 2 is the more likely energy pathway. Model predictions capture well the whole ontogeny of a generalized northern bobwhite quail and are able to reproduce most of the data variability via variability in (i) egg size, (ii) egg-laying rate and (iii) inter-individual physiological variability modeled via the zoom factor, i.e. assimilation potential. Reliable models with a capacity to predict physiological responses of individuals are relevant not only for experimental setups studying effects of various natural and anthropogenic pressures on the quail as a bird model organism, but also for wild quail management and conservation. The model is, with minor modifications, applicable to other species of interest, making it a most valuable tool in the emerging field of conservation physiology.

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Section: Discussionmentioning

confidence: 99%

Energetic basis for bird ontogeny and egg-laying applied to the bobwhite quail

Marn

Lika

Augustine

et al. 2022

Conservation Physiology

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“…Normal stages of development are required to determine the impacts of stressors and teratogens on embryo development [ 21 ]. Factors such as heat stress from drought [ 21 , 22 ] and hazardous pesticides have been shown to drastically affect the development of other quail species [ 23 – 25 ], and have major consequences for population sustainability [ 26 , 27 ]. California valley quail are considered highly vulnerable to climate change due to increased fire risk, and spring heat waves disrupting reproduction [ 28 ].…”

Section: Discussionmentioning

confidence: 99%

“…Shipping, and receiving temperatures can exceed physiological zero [ 29 ], and reach threatening or lethal levels [ 22 – 26 ]. This may result in altered development [ 21 , 23 , 24 ], affecting the recorded embryological stages. Our eggs were packaged in foam within cardboard boxes, shipped during the spring within 24 hours of collection, and quickly processed on the receiving end.…”

Section: Discussionmentioning

confidence: 99%

The normal stages of development for the California valley quail

2022

Self Cite

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One challenge in avian embryology is establishing a standard developmental timetable, primarily because eggs incubated for identical durations can vary in developmental progress, even within the same species. For remedy, avian development is classified into distinct stages based on the formation of key morphological structures. Developmental stages exist for a few galliform species, but the literature is lacking a description of normal stages for California valley quail (Callipepla californica). Thus, the objective of this study was to stage and document the morphological and structural development of California valley quail. Over two laying seasons, 390 eggs were incubated at 37.8֯ C in 60% RH for ≤23 days. Eggs were opened every ≤6 hours to document embryonic development, including, blastoderm diameter, anterior angle of nostril to beak tip, and lengths of wing, tarsus, third toe, total beak, total foot, and embryo. California valley quail embryos were staged and compared to domestic chicken (Gallus gallus domesticus), the staging standard for galliformes, as well as Japanese quail (Coturnix japonica), blue-breasted quail (Synoicus chinensis) and northern bobwhite quail (Colinus virginianus). This study produced the first description of the 43 normal stages of development for California valley quail. Compared with other galliformes, the California valley quail has a different number of stages and displays developmental heterochrony in stages 1–24, and morphological and developmental differences in stages 25–hatch. The observed differences emphasize the importance of staging individual avian species instead of relying on poultry animal models or close relatives for developmental reference. This is extremely important in species-specific embryological studies that evaluate critical windows of development or evaluate the impacts of environmental change on avian development. This study also suggests that staging frequencies of ≤6 hours and egg transport protocols should be standardized for future staging studies.

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“…Northern bobwhite quail populations (Colinus virginianus) have been in decline for over a century, 1 largely due to climate, habitat loss, and population fragmentation. [2][3][4][5][6][7] For remedy, wildlife managers have typically focused their efforts on quail habitat restoration; however, for declining density-dependent species like northern bobwhite, habitat restoration alone has had mixed results. 8 Thus, wildlife managers are increasingly utilizing population restoration techniques (PRT) like releasing captive-reared or translocating wild birds, to re-establish or bolster quail populations in restored habitat.…”

Section: Introductionmentioning

confidence: 99%

Efficacy of acclimating and releasing captive-reared and wild-translocated Northern bobwhites

Reyna

Whitt

Newman

2021

Avian Biology Research

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Northern bobwhite populations are dwindling across their range. Accordingly, in areas with bobwhite habitat restoration and no nearby populations, effective population restoration techniques are needed. Here, we evaluated three bobwhite restoration release strategies: (1) release of captive-reared bobwhites on sites with and without resident populations, (2) translocation of wild-trapped bobwhites from a region of high population density to a region with no population, and (3) release of captive-reared and wild-translocated bobwhites acclimated on site prior to release in year 2. Wild-translocated birds survived longer than captive-reared birds. Mean survival for captive-reared bobwhites was 2.42 weeks, and 4.27 weeks in year 1, and 1.91 and 1.40 weeks in year 2, for study sites without resident and with resident birds present, respectively. Mean survival for wild-translocated birds was 8.50 weeks in year 1, and 11.54 weeks in year 2. Wild-translocated birds dispersed shorter distances than captive-reared birds. Both captive-reared and wild-translocated bobwhites only nested on study sites with conspecifics. Captive-reared birds had 0 nesting attempts on the site with no resident bobwhites, and ⩾8 nests on the site with resident bobwhites. Wild-translocated females nested six times and were subsequently observed with juveniles. On-site acclimation did not increase post-release survival for northern bobwhites. Acclimation increased site fidelity but reduced survival for captive-reared birds and had no impact on survival for wild-translocated bobwhites. Population restoration by release of captive-reared or wild-translocated birds is not irrelevant, but further investigation is needed into the relationship between captive-reared birds and predators, and methods to increase survival and reproduction of released birds.

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Acute exposure to hyperthermic oscillating temperatures during pre-incubation influences northern bobwhite development, hatching, and survival

Cited by 9 publications

References 25 publications

Energetic basis for bird ontogeny and egg-laying applied to the bobwhite quail

Energetic basis for bird ontogeny and egg-laying applied to the bobwhite quail

The normal stages of development for the California valley quail

Efficacy of acclimating and releasing captive-reared and wild-translocated Northern bobwhites

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