Article
Environmental Sciences
Arthur D. Barraza, Larissa Young, Caitlin E. Smith, David T. Booth, Christine A. Madden Hof, Kimberly A. Finlayson, Frederic D. L. Leusch, Jason P. van de Merwe
Summary: Sea turtle nesting beaches are experiencing increased sand temperatures, resulting in a high percentage of female hatchlings. The effects of contaminants, such as trace elements and organic pollutants, on sex determination and hatchling health are significant. Understanding the interactions between contaminants and temperature is crucial for future studies on sea turtle conservation.
FRONTIERS IN MARINE SCIENCE
(2023)
Article
Agriculture, Dairy & Animal Science
Shuran Li, Zhiwang Xu, Laigao Luo, Jun Ping, Huabin Zhou, Lei Xie, Yongpu Zhang
Summary: This study investigates the sex determination patterns in different populations of the Japanese gecko in China by incubating their eggs at different temperatures. The researchers find that there are variations in the sex determination patterns among gecko populations at different latitudes. The low-latitude population has a nearly equal sex ratio, while the high-latitude populations produce more male offspring at certain temperatures.
Article
Biology
Jessica Alice Leivesley, Njal Rollinson
Summary: The Charnov-Bull model is often used to explain the evolution of temperature-dependent sex determination. In snapping turtles, factors related to reproductive processes and physiological conditions, such as fluctuating incubation temperature and egg mass, may have an impact on early-life immune response. However, early immune response unrelated to sex may not play a role in the temperature-dependent sex determination in reptiles.
JOURNAL OF EXPERIMENTAL BIOLOGY
(2021)
Review
Biology
Ceri Weber, Blanche Capel
Summary: Sex determination is a synthesis of many molecular events that drives a community of cells towards a coordinated tissue fate, even without inherited genetic determinants. Recent studies suggest that epigenetic regulation and temperature can play a significant role in initiating and stabilizing the sex determination pathway. Investigations should focus on cellular processes that can synthesize multiple inputs and drive a coordinated response, rather than a singular regulator of sex determination.
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
(2021)
Article
Multidisciplinary Sciences
Natalia El-Merhie, Arne Krueger, Karin Uliczka, Stephanie Papenmeier, Thomas Roeder, Klaus F. Rabe, Christina Wagner, Hanna Angstmann, Susanne Krauss-Etschmann
Summary: This study investigated the impact of maternal e-nicotine exposure on offspring development, revealing that maternal exposure not only reduces fertility, but also affects offspring size, weight, and tracheal development from embryonic stage to adulthood. These findings underscore the need for further research on the effects of maternal vaping on offspring health and suggest a potential model for analyzing the molecular mechanisms involved in these intergenerational changes.
SCIENTIFIC REPORTS
(2021)
Article
Biology
Sarah L. Whiteley, Arthur Georges, Vera Weisbecker, Lisa E. Schwanz, Clare E. Holleley
Summary: Sex determination in the jacky dragon involves both temperature-dependent and genetic cues, leading to different sex ratios at different incubation temperatures. Developmental data suggests a mode of sex determination that is intermediate between genetic sex determination and temperature-dependent sex determination.
PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
(2021)
Article
Ecology
Jessica A. Leivesley, E. Graham Nancekivell, Ronald J. Brooks, Jacqueline D. Litzgus, Njal Rollinson
Summary: This study found that reptiles with temperature-dependent sex determination (TSD) can maintain stable sex ratios despite climate change. The stability is achieved through seasonal variation in nest-level sex ratios, which is influenced by thermal gradients and mixed-sex clutches. Additionally, the impact of nighttime air temperature on warming is greater than that of daily maximum temperature, while the development rate is more affected by maximum daily air temperature, providing additional resilience to overall warming.
AMERICAN NATURALIST
(2022)
Article
Clinical Neurology
Magdalena Kobus, Aneta Sitek, Boguslaw Antoszewski, Jacek Rozniecki, Jacek Pelka, Elzbieta Zadzinska
Summary: The study suggests that exposure to different proportions of prenatal sex steroids depending on sex might be a risk factor for migraine in adults. Women with migraine may have been exposed to higher levels of testosterone relative to estrogen in prenatal life, while men with migraine may have been exposed to higher levels of estrogen relative to testosterone in prenatal life.
JOURNAL OF HEADACHE AND PAIN
(2021)
Article
Ecology
Jonathan R. Monsinjon, Jean-Michel Guillon, Jeanette Wyneken, Marc Girondot
Summary: Species with temperature-dependent sex determination (TSD) can experience biased sex ratios in natural conditions. This study introduces a novel concept called thermal reaction norm for sexualization to model the effect of temperature on sex determination in TSD species. The results show that temperature can influence the sexualization of the gonad earlier than previously recognized. The new approach greatly outperforms previous ones in sex ratio prediction.
ECOLOGICAL MODELLING
(2022)
Article
Ecology
Samantha L. Bock, Yeraldi Loera, Josiah M. Johnson, Christopher R. Smaga, David L. Haskins, Tracey D. Tuberville, Randeep Singh, Thomas R. Rainwater, Philip M. Wilkinson, Benjamin B. Parrott
Summary: The study provides the first empirical support for the adaptive value of temperature-dependent sex determination (TSD) in crocodilians, showing that incubation temperature influences the annual survival of alligator hatchlings. This finding suggests that TSD has adaptive advantages in alligator populations.
FUNCTIONAL ECOLOGY
(2023)
Article
Biology
Nils Linek, Tamara Volkmer, J. Ryan Shipley, Cornelia W. Twining, Daniel Zuniga, Martin Wikelski, Jesko Partecke
Summary: The study found that Eurasian blackbirds decrease their body temperature at night in response to decreasing ambient temperature, but not during the daytime. However, they increase their heart rate when ambient temperatures become colder in all seasons, with the temperature setpoint at which heart rate is increased differing between seasons and day/night.
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
(2021)
Article
Fisheries
Grace M. M. Hancock, Gorka Sancho, Stephan B. B. Munch, Santiago Salinas
Summary: Temperature-dependent sex determination occurs when the temperature affects gonad determination during development. Previous studies on TSD in fishes were mostly conducted under constant temperatures, but daily fluctuating temperatures can significantly impact fish physiology and life history. Therefore, we exposed Atlantic silverside, a TSD species, to different temperatures (28°C, 28°C±2°C, and 28°C±4°C) and quantified the sex ratios and length. The results showed that the percentage of females increased by 60%-70% under daily fluctuating temperatures (from 10% to 16% and 17%).
JOURNAL OF FISH BIOLOGY
(2023)
Article
Biochemistry & Molecular Biology
Hui Chen, David Van Reyk, Annabel Oliveira, Yik Lung Chan, Stephanie E. L. Town, Benjamin Rayner, Carol A. Pollock, Sonia Saad, Jacob George, Matthew P. Padula, Brian G. Oliver
Summary: Maternal exposure to low levels of PM2.5 has negative effects on liver health and metabolism in offspring, with more severe impacts on females. Removing PM2.5 during gestation provides limited protection in offspring's metabolism.
Article
Environmental Sciences
L. Heredero Saura, L. Janez-Escalada, J. Lopez Navas, K. Cordero, P. Santidrian Tomillo
Summary: This study found that green turtles exhibit nest-site repeatability, with nests placed by the same individual being closer together. Turtles adjust their nesting behavior throughout the nesting season, with late nests being placed closer to each other. Green turtles prefer nesting in shaded areas, particularly under trees, which helps mitigate the impacts of climate change on sex ratios.
Article
Multidisciplinary Sciences
Ryoji Shinya, Simo Sun, Mehmet Dayi, Isheng Jason Tsai, Atsushi Miyama, Anthony Fu Chen, Koichi Hasegawa, Igor Antoshechkin, Taisei Kikuchi, Paul W. Sternberg
Summary: The authors demonstrate that sex determination in Bursaphelenchus nematodes is likely regulated by a random, epigenetic mechanism, rather than the more well-known mechanisms of chromosomal or environmental sex determination.
NATURE COMMUNICATIONS
(2022)
Article
Biology
Anthony T. Breitenbach, Amanda W. Carter, Ryan T. Paitz, Rachel M. Bowden
PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
(2020)
Editorial Material
Zoology
Amanda W. Carter, Ryan T. Paitz, Rachel M. Bowden
INTEGRATIVE AND COMPARATIVE BIOLOGY
(2020)
Review
Developmental Biology
Rachel M. Bowden, Ryan T. Paitz
Summary: In species with temperature-dependent sex determination, incubation temperatures play a crucial role in gonadal differentiation, leading to the development of either ovaries or testes. Variations in thermal responsiveness among individuals can drive differences in resulting sex ratios, with recent studies in red-eared slider turtles showing distinct responses to heatwave exposures. Maternal estrogens may influence this thermal responsiveness, highlighting the need for further research into the molecular responses to temperature and endocrine environments in species with TSD.
SEXUAL DEVELOPMENT
(2021)
Article
Endocrinology & Metabolism
Madison A. Rittinger, Rachel M. Bowden, Logan A. Sauers, Ryan T. Paitz, Christine J. Poppe, Charles F. Thompson, Scott K. Sakaluk
Summary: Variation in nestling growth and survival is influenced by hatching order with sex-specific differences in nestling size and condition. The sex-dependent effects of hatching order on nestling corticosterone levels may arise from embryonic exposure to maternally-derived corticosterone, while post-natal rearing environment plays a minimal role in determining nestling baseline corticosterone levels.
GENERAL AND COMPARATIVE ENDOCRINOLOGY
(2022)
Article
Zoology
Ryan T. Paitz, Matthew B. Dugas
Summary: Research on maternal steroid effects in frog eggs revealed abundant levels of steroids, particularly progestogens, with no detection of estrogens. Experimental manipulation showed an initial increase in steroid levels with pregnenolone and progesterone treatment, but they eventually declined to levels similar to untreated eggs.
JOURNAL OF EXPERIMENTAL ZOOLOGY PART A-ECOLOGICAL AND INTEGRATIVE PHYSIOLOGY
(2022)
Article
Zoology
Anthony T. Breitenbach, Rachel M. Bowden, Ryan T. Paitz
Summary: Temperature has complex effects on biological processes, and there are differences in gene expression related to temperature-dependent sex determination under constant and fluctuating temperatures.
INTEGRATIVE AND COMPARATIVE BIOLOGY
(2022)
Article
Biology
James C. Mouton, Renee A. Duckworth, Ryan T. Paitz, Thomas E. Martin
Summary: In songbirds, androgens can influence offspring development and begging behaviors to reduce predation risk, but little is known about other steroids' effects. This study found that increased nest predation risk led to decreased yolk progesterone deposition, while yolk androgen deposition did not change significantly.
JOURNAL OF EXPERIMENTAL BIOLOGY
(2022)
Article
Biology
Rosario A. Marroquin-Flores, Ryan T. Paitz, Rachel M. Bowden
Summary: Variation in developmental conditions can affect various embryonic processes and phenotypic characteristics in oviparous species, including survival and behavior, which can be influenced by temperature and exposure to steroid hormones. Temperature and maternal estrogens can affect the fate of gonadal development and gene expression patterns. Conjugated hormones, such as estrone sulfate, are capable of influencing temperature-dependent pathways and altering embryo responses to temperature, emphasizing the importance of studying the interaction between maternal hormones and temperature effects.
JOURNAL OF EXPERIMENTAL BIOLOGY
(2022)
Article
Biology
Ryan T. Paitz, Anthony T. Breitenbach, Rosario A. Marroquin-Flores, Rachel M. Bowden
Summary: This article discusses the response mechanisms of organisms to temperature changes and the underlying variation in temperature-sensitive processes, and proposes a framework for addressing these questions. This is crucial for understanding and coping with climate change.
JOURNAL OF EXPERIMENTAL BIOLOGY
(2022)
Correction
Biology
Anthony T. T. Breitenbach, Amanda W. W. Carter, Ryan T. T. Paitz, Rachel M. M. Bowden
PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
(2022)
Article
Biology
Rosario A. Marroquin-Flores, Rachel M. Bowden, Ryan T. Paitz
Summary: This study investigates temperature-sensitive splicing in Kdm6b by exposing embryos to male- and female-producing thermal conditions. The results demonstrate that temperature-sensitive splicing can differentially regulate genes critical to TSD under ecologically relevant conditions.
Meeting Abstract
Zoology
R. A. Marroquin-Flores, R. T. Paitz, R. M. Bowden
INTEGRATIVE AND COMPARATIVE BIOLOGY
(2021)
Meeting Abstract
Zoology
A. T. Breitenbach, R. T. Paitz, R. M. Bowden
INTEGRATIVE AND COMPARATIVE BIOLOGY
(2021)
Article
Biology
M. E. Hauber, M. Abolins-Abols, C. R. Kim, R. T. Paitz
INTEGRATIVE ORGANISMAL BIOLOGY
(2020)
Meeting Abstract
Zoology
R. A. Marroquin-Flores, N. T. Mortimer, R. T. Paitz, R. M. Bowden
INTEGRATIVE AND COMPARATIVE BIOLOGY
(2020)