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Mitchell C, Wylde Z, Del Castillo E, Rapkin J, House CM, Hunt J. Beauty or function? The opposing effects of natural and sexual selection on cuticular hydrocarbons in male black field crickets. J Evol Biol 2023; 36:1266-1281. [PMID: 37534753 DOI: 10.1111/jeb.14198] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2022] [Revised: 04/21/2023] [Accepted: 05/10/2023] [Indexed: 08/04/2023]
Abstract
Although many theoretical models of male sexual trait evolution assume that sexual selection is countered by natural selection, direct empirical tests of this assumption are relatively uncommon. Cuticular hydrocarbons (CHCs) are known to play an important role not only in restricting evaporative water loss but also in sexual signalling in most terrestrial arthropods. Insects adjusting their CHC layer for optimal desiccation resistance is often thought to come at the expense of successful sexual attraction, suggesting that natural and sexual selection are in opposition for this trait. In this study, we sampled the CHCs of male black field crickets (Teleogryllus commodus) using solid-phase microextraction and then either measured their evaporative water loss or mating success. We then used multivariate selection analysis to quantify the strength and form of natural and sexual selection targeting male CHCs. Both natural and sexual selection imposed significant linear and stabilizing selection on male CHCs, although for very different combinations. Natural selection largely favoured an increase in the total abundance of CHCs, especially those with a longer chain length. In contrast, mating success peaked at a lower total abundance of CHCs and declined as CHC abundance increased. However, mating success did improve with an increase in a number of specific CHC components that also increased evaporative water loss. Importantly, this resulted in the combination of male CHCs favoured by natural selection and sexual selection being strongly opposing. Our findings suggest that the balance between natural and sexual selection is likely to play an important role in the evolution of male CHCs in T. commodus and may help explain why CHCs are so divergent across populations and species.
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Li H, Castillo ED. Optimal Design of Experiments on Riemannian Manifolds. J Am Stat Assoc 2022. [DOI: 10.1080/01621459.2022.2146587] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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Ruth Archer C, Bunning H, Rapkin J, Jensen K, Moore PJ, House CM, Del Castillo E, Hunt J. Ovarian apoptosis is regulated by carbohydrate intake but not by protein intake in speckled cockroaches. JOURNAL OF INSECT PHYSIOLOGY 2022; 143:104452. [PMID: 36309083 DOI: 10.1016/j.jinsphys.2022.104452] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Revised: 10/17/2022] [Accepted: 10/21/2022] [Indexed: 06/16/2023]
Abstract
When the likelihood of reproducing successfully is low, any prior investment in developing oocytes may be wasted. One means of recouping this investment is oosorption - where ova are absorbed and resources salvaged so they can be re-allocated to other traits. Food-limited female speckled cockroaches (Nauphoeta cinerea) appear to use this strategy. However, it is unclear if total food intake or the availability of specific nutrients induces this process. Here, we used the geometric framework of nutrition to determine how protein, carbohydrate and energy intake affect levels of ovarian apoptosis and necrosis (controlled versus uncontrolled cell death) in the terminal oocytes of female N. cinerea. We then compare the effects of nutrient intake on apoptosis (a key step towards oosorption) and offspring production to better understand the relationship between diet, apoptosis and female fitness. We found that even when food was abundant, females experienced high levels of apoptosis if their diet lacked carbohydrate. Necrosis was reduced when energy intake was high, but largely irrespective of nutrient ratio. Offspring production peaked on a low protein, high carbohydrate nutrient ratio (1P:7.96C), similar to that which minimized apoptosis (1P:7.34C) but not in the region of nutrient space that minimized necrosis. Thus, females consuming an ideal nutrient blend for reproduction can invest heavily in their current brood without needing to salvage nutrients from developing ova. However, offspring production was more dependent on carbohydrate consumption than apoptosis was, suggesting that the importance of carbohydrate in reproduction goes beyond regulating oosorption. This reliance on carbohydrate for female reproduction may reflect the unusual reproductive and nutritional physiology of speckled cockroaches; attributes that make this species an exciting model for understanding how diet regulates reproduction.
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Cai JR, Camacho IB, Caras EM, Carayugan JA, Carmona KH, Castillo CO, Castillo ED, Nieto XA, Sison RG. The Prognostic Significance of Established Hematological Parameters and Inflammatory Biomarkers in Assessing Dengue Infection Severity and Progression among Patients Ages 5 to 14 in a Tertiary Government Hospital in Pampanga, Philippines. Am J Clin Pathol 2021. [DOI: 10.1093/ajcp/aqab191.220] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Introduction/Objective
Dengue virus (DENV) is an arthropod-borne virus which imposes a significant burden on the health system in most tropical and subtropical countries. In 2009, WHO classified Dengue into Dengue Without Warning Signs (DNWS), Dengue With Warning Signs (DWWS), and Severe Dengue (SD). This study aims to establish the prognostic value of predetermined hematological parameters and inflammatory biomarkers in assessing severity and progression of dengue infection among ages 5-14.
Methods/Case Report
A retrospective study was conducted to evaluate the Complete Blood Count, Inflammation biomarkers, and severity of dengue patients (5-14 of age). The diagnosis must be serologically confirmed by a positive NS1/IgM.
Results (if a Case Study enter NA)
A total of 36 patients participated in the study, having 18 from each groups of DWWS and SD. The mean age of Dengue cohort was 13.9 years with 59% (19/36) being male. Laboratory findings reveal SD to have lower platelet count (<100.00x109/L) during day 1-3 (p<0.001). Low WBC count (<4.00x109/L), Relative Eosinophil (<2.00%), and Absolute Lymphocyte count (<1.52x109/L) were evident on days 1-3 among DWWS and SD cases (p=0.023; p=0.045; p=0.033). Low relative neutrophil (<0.45%) was a constant finding in both clinical types throughout disease progression. SD group had significantly higher Neutrophil to Lymphocyte ratio (NLR) values among SD cases on days 4-6 (p<0.001). In contrast, Platelet to Lymphocyte ratio (PLR) was significantly lower among DWWS cases on days 4-6 (p=0.020). Monocyte to Lymphocyte (MLR) ratio had poor discriminative power (p=0.560).
Conclusion
The findings highlight decreased platelet, WBC, relative eosinophil, and absolute lymphocyte count to be common among Dengue patients. NLR and PLR were found to be good predictors of dengue severity during the initial phase of infection. Evaluating these values may aid clinicians in early diagnosis of severe dengue. However, larger samples are needed to further validate the predictive values of these parameters.
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House C, Tunstall P, Rapkin J, Bale MJ, Gage M, Del Castillo E, Hunt J. Multivariate stabilizing sexual selection and the evolution of male and female genital morphology in the red flour beetle. Evolution 2020; 74:883-896. [PMID: 31889313 PMCID: PMC7317928 DOI: 10.1111/evo.13912] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2018] [Revised: 12/11/2019] [Accepted: 12/15/2019] [Indexed: 11/28/2022]
Abstract
Male genitals are highly divergent in animals with internal fertilization. Most studies attempting to explain this diversity have focused on testing the major hypotheses of genital evolution (the lock‐and‐key, pleiotropy, and sexual selection hypotheses), and quantifying the form of selection targeting male genitals has played an important role in this endeavor. However, we currently know far less about selection targeting female genitals or how male and female genitals interact during mating. Here, we use formal selection analysis to show that genital size and shape is subject to strong multivariate stabilizing sexual selection in both sexes of the red flour beetle, Tribolium castaneum. Moreover, we show significant sexual selection on the covariance between the sexes for specific aspects of genital shape suggesting that male and female genitalia also interact to determine the successful transfer of a spermatophore during mating. Our work therefore highlights the important role that both male and female genital morphologies play in determining mating success and that these effects can occur independently, as well as through their interaction. Moreover, it cautions against the overly simplistic view that the sexual selection targeting genital morphology will always be directional in form and restricted primarily to males.
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Rapkin J, Jensen K, Archer CR, House CM, Sakaluk SK, Castillo ED, Hunt J. The Geometry of Nutrient Space-Based Life-History Trade-Offs: Sex-Specific Effects of Macronutrient Intake on the Trade-Off between Encapsulation Ability and Reproductive Effort in Decorated Crickets. Am Nat 2018; 191:452-474. [PMID: 29570407 DOI: 10.1086/696147] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Life-history theory assumes that traits compete for limited resources, resulting in trade-offs. The most commonly manipulated resource in empirical studies is the quantity or quality of diet. Recent studies using the geometric framework for nutrition, however, suggest that trade-offs are often regulated by the intake of specific nutrients, but a formal approach to identify and quantify the strength of such trade-offs is lacking. We posit that trade-offs occur whenever life-history traits are maximized in different regions of nutrient space, as evidenced by nonoverlapping 95% confidence regions of the global maximum for each trait and large angles (θ) between linear nutritional vectors and Euclidean distances (d) between global maxima. We then examined the effects of protein and carbohydrate intake on the trade-off between reproduction and aspects of immune function in male and female Gryllodes sigillatus. Female encapsulation ability and egg production increased with the intake of both nutrients, whereas male encapsulation ability increased with protein intake but calling effort increased with carbohydrate intake. The trade-offs between traits was therefore larger in males than in females, as demonstrated by significant negative correlations between the traits in males, nonoverlapping 95% confidence regions, and larger estimates of θ and d. Under dietary choice, the sexes had similar regulated intakes, but neither optimally regulated nutrient intake for maximal trait expression. We highlight the fact that greater consideration of specific nutrient intake is needed when examining nutrient space-based trade-offs.
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Castillo ED. A Multivariate Self-Tuning Controller for Run-To-Run Process Control under Shift and Trend Disturbances. ACTA ACUST UNITED AC 2016. [DOI: 10.1080/15458830.1996.11770756] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Vanli OA, Castillo ED. Closed-Loop System Identification for Small Samples With Constraints. Technometrics 2007. [DOI: 10.1198/004017007000000146] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Miró-Quesada G, Del Castillo E, Peterson JJ. A Bayesian Approach for Multiple Response Surface Optimization in the Presence of Noise Variables. J Appl Stat 2007; 31:251-270. [PMID: 39372312 PMCID: PMC11451937 DOI: 10.1080/0266476042000184019] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
An approach for the multiple response robust parameter design problem based on a methodology by Peterson (2000) is presented. The approach is Bayesian, and consists of maximizing the posterior predictive probability that the process satisfies a set of constraints on the responses. In order to find a solution robust to variation in the noise variables, the predictive density is integrated not only with respect to the response variables but also with respect to the assumed distribution of the noise variables. The maximization problem involves repeated Monte Carlo integrations, and two different methods to solve it are evaluated. A Matlab code was written that rapidly finds an optimal (robust) solution in case it exists. Two examples taken from the literature are used to illustrate the proposed method.
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Lian Z, Colosimo BM, Del Castillo E. Setup Adjustment of Multiple Lots Using a Sequential Monte Carlo Method. Technometrics 2006. [DOI: 10.1198/004017006000000066] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Rajagopal R, Del Castillo E. A Bayesian method for robust tolerance control and parameter design. ACTA ACUST UNITED AC 2006. [DOI: 10.1080/07408170600692283] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Peterson JJ, Cahya S, Del Castillo E. Letter to the Editor. Technometrics 2004. [DOI: 10.1198/004017004000000383] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Cahya S, Del Castillo E, Peterson JJ. Computation of Confidence Regions for Optimal Factor Levels in Constrained Response Surface Problems. J Comput Graph Stat 2004. [DOI: 10.1198/1061860043443] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Quesada GM, Del Castillo E. A Dual-Response Approach to the Multivariate Robust Parameter Design Problem. Technometrics 2004. [DOI: 10.1198/004017004000000220] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Iyer PS, Haight JM, Del Castillo E, Tink BW, Hawkins PW. Intervention Effectiveness Research: Understanding and Optimizing Industrial Safety Programs Using Leading Indicators. ACTA ACUST UNITED AC 2004. [DOI: 10.1016/j.chs.2003.10.003] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Miró-Quesada G, Del Castillo E. An Enhanced Recursive Stopping Rule for Steepest Ascent Searches in Response Surface Methodology. COMMUN STAT-SIMUL C 2004. [DOI: 10.1081/sac-120028441] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Del Castillo E. Closed-Loop Disturbance Identification and Controller Tuning for Discrete Manufacturing Processes. Technometrics 2002. [DOI: 10.1198/004017002317375082] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Del Castillo E, Cahya S. A Tool for Computing Confidence Regions on the Stationary Point of a Response Surface. AM STAT 2001. [DOI: 10.1198/000313001753272349] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Göb R, Del Castillo E, Ratz M. RUN LENGTH COMPARISONS OF SHEWHART CHARTS AND MOST POWERFUL TEST CHARTS FOR THE DETECTION OF TRENDS AND SHIFTS. COMMUN STAT-SIMUL C 2001. [DOI: 10.1081/sac-100002372] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Göb R, Del Castillo E, Dräger K. Run length analysis of Shewhart charts applied to drifting processes under an integrative SPC/EPC model. METRIKA 1999. [DOI: 10.1007/s001840050041] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Castillo ED. SPC Methods for Quality Improvement. Technometrics 1999. [DOI: 10.1080/00401706.1999.10485638] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Castillo ED, Derman C, Ross SM. Statistical Aspects of Quality Control. AM STAT 1997. [DOI: 10.2307/2685908] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Del Castillo E. Run length distributions and economic design of $$\bar X$$ charts with unknown process variance. METRIKA 1996. [DOI: 10.1007/bf02613907] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Castillo ED, Grayson JM, Montgomery DC, Runger GC. A review of statistical process control techniques for short run manufacturing systems. COMMUN STAT-THEOR M 1996. [DOI: 10.1080/03610929608831866] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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