BDSM is now used as a catch-all phrase covering a wide range of activities, forms of interpersonal relationships, and distinct subcultures. The initialism BDSM is first recorded in a Usenet post from 1991, and is interpreted as a combination of the abbreviations B/D (Bondage and Discipline), D/s (Dominance and submission), and S/M (Sadism and Masochism). Given the wide range of practices, some of which may be engaged in by people who do not consider themselves to be practising BDSM, inclusion in the BDSM community or subculture often is said to depend on self-identification and shared experience. Partner who performs or controls the activityīDSM is a variety of often erotic practices or roleplaying involving bondage, discipline, dominance and submission, sadomasochism, and other related interpersonal dynamics. For the medical condition in which pain/humiliation is required for sexual arousal and causes distress or impairment, see Sexual masochism disorder. For the medical condition involving non-consensual ideation or behaviour, see Sexual sadism disorder. ![]() Though we will not go through the derivations here, you can try them out on your own by replacing these terms with 0 then solving for N prey and N pred, respectively.This article is about consensual adult sadomasochistic activity. In other words, we want to solve for dN pred/dt = 0 and dN prey/dt = 0. For the prey population, we want to find values of predator and prey population sizes at which the prey population remains stable. We will examine these questions by seeking equilibrium solutions to the coupled predator and prey equations we introduced above. Under what conditions will predator and prey populations both persist indefinitely? What will be their population dynamics while they coexist? In other words, will one or both populations stabilize, or will they continue to change over time?.Under what conditions will the predator population die off, leaving the prey population to expand unhindered?.Under what conditions (i.e., parameter values) will the predator population drive the prey to extinction?.We can ask several questions about the interaction between predators and their prey using these equations: Specifically, these equations lead to oscillations between the populations of predators and their prey. In other words, the equation for prey includes a term for N pred and the equation for predators includes the term N prey and changes in one population will always impact the other population. It’s important to note that the prey and predator equations above are coupled equations. ![]() R prey = prey per capita rate of increase P = attack rate efficiency (a slope: the change in prey consumed per predator per time as a function of the number of prey) higher search or handling time leads to a lower p In words, the predator population grows according to the attack rate, conversion efficiency, and prey population, minus losses to starvation.ĭN prey/dt = rate of change in prey population (change in number over change in time)ĭN pred/dt = rate of change in predator population (change in number over change in time)Ĭ = rate at which prey are converted into offspring (a slope: predators produced per predator per time as a function of prey consumed per unit time)
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