Regular ArticleInteractions between Behavior and Plasma Steroids within the Scramble Mating System of the Promiscuous Green Turtle, Chelonia mydas
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Dynamics of a ratio-dependent population model for Green Sea Turtle with age structure
2021, Journal of Theoretical BiologyGreen turtle (Chelonia mydas) population demographics at three chemically distinct foraging areas in the northern Great Barrier Reef
2019, Science of the Total EnvironmentCitation Excerpt :This is because adult male green turtles migrate for breeding more frequently than adult females (Limpus et al., 2005), leading to more balanced ‘operational sex ratios’ at breeding sites (Hays et al., 2010). In addition, due to the polygamous mating behavior of green turtles (Jessop et al., 1999), even female biased operational sex ratios may be able to sustain nesting populations. This may be particularly likely in very large nesting populations (e.g., nGBR, Atlantic Coast of Florida), where even if hatchling production is extremely female-biased (>90%), there may still be sufficient males in the adult population to breed with all of the females (Hays et al., 2014).
When the ball is in the female's court: How the scramble-competition mating system of the North American red squirrel has shaped male physiology and testosterone dynamics
2017, General and Comparative EndocrinologyCitation Excerpt :In a number of rodent species, reproductive success of males is positively related to their mobility and mate searching (Barash, 1981; Murie and McLean, 1980; Schwagmeyer, 1988; Mills et al., 2009). This reproductive strategy has evolved mainly in species with scramble-competition mating systems where male mating success is mostly determined by the ability to locate receptive females (Alexander et al., 1979; Schwagmeyer, 1988; Jessop et al., 1999; Waterman, 2007). Since male mobility and mate searching are positively correlated with T levels (Mills et al., 2009; Schradin and Yuen, 2011), it is possible that T stimulates male searching for receptive females.
Pre-GnRH and GnRH-induced testosterone levels do not vary across behavioral contexts: A role for individual variation
2017, General and Comparative EndocrinologyCitation Excerpt :The relationships between behavior and testosterone are predicted by the Challenge Hypothesis (Wingfield et al., 1990). The Challenge Hypothesis was originally developed to predict variation in testosterone levels in relation to territorial and parental behavior in birds (Wingfield et al., 1990), but it has also been tested in other vertebrates including mammals (e.g., Reburn and Wynne-Edwards, 1999; Cavigelli and Pereira, 2000; Archer, 2004; Gettler et al., 2011), fishes (e.g., Knapp et al., 1999; Hirschenhauser et al., 2004; Parikh et al., 2006; Hanson et al., 2009), and reptiles (e.g., Marler and Moore, 1988; Jessop et al., 1999; Sinervo et al., 2000). According to the Challenge Hypothesis, high levels of testosterone are expected to increase the likelihood of the expression of sexual behavior and territorial aggression against conspecifics (Marler and Moore, 1988; Wingfield et al., 1990; Chandler et al., 1994; Raouf et al., 1997; Jessop et al., 1999; Reburn and Wynne-Edwards, 1999; Reed et al., 2006).
Reproductive Disorders and Perinatology of Sea Turtles
2017, Veterinary Clinics of North America - Exotic Animal PracticeCitation Excerpt :Male sea turtles are promiscuous seasonal breeders. They exhibit migratory behavior and show strong fidelity to both courtship areas and foraging sites.28 Courtship seems to occur during a short period before the nesting season.
Hormones, Brain, and Behavior in Reptiles
2017, Hormones, Brain and Behavior: Third Edition