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See searches and references containing FISHERS PRINCIPLE!FISHERS PRINCIPLE
Evolutionary model that explains the sex ratio
Fisher's principle is an evolutionary model that explains why the sex ratio of most species that produce offspring through sexual reproduction is approximately
Fisher's_principle
British polymath (1890–1962)
one of the three principal founders of population genetics. Fisher outlined Fisher's principle, the Fisherian runaway, the sexy son hypothesis theories of
Ronald_Fisher
Decision rule used for minimizing the possible loss for a worst-case scenario
where he refers to it in the context of The Difference Principle. Rawls defined this principle as the rule which states that social and economic inequalities
Minimax
Logical paradox in decision-making theory
enabling the eventual dominance of intolerance, thereby undermining the very principle of tolerance. This paradox was articulated by philosopher Karl Popper
Paradox_of_tolerance
Ratio of males to females in a population
is the ratio of males to females in a population. As explained by Fisher's principle, for evolutionary reasons this is usually about equal in species which
Sex_ratio
Foundational principle in quantum physics
The uncertainty principle, also known as Heisenberg's indeterminacy principle, is a fundamental concept in quantum mechanics. It states that there is
Uncertainty_principle
Ratio of males to females in a population
specified otherwise. Fisher's principle is an explanation of why the sex ratio of most species is approximately 1:1. Outlined by Ronald Fisher in his 1930 book
Human_sex_ratio
Biology theory
or to have only hermaphroditic flowers. R.A. Fisher developed an explanation, known as Fisher's principle, of why sex ratios in many animals are 1:1. If
Sex_allocation
Paper-and-pencil game for two players
strategy Games Chicken Stag hunt Applications Cultural group selection Fisher's principle Mobbing Terminal investment hypothesis Key people John Maynard Smith
Tic-tac-toe
Mode of natural selection involving the choosing of and competition for mates
son hypothesis indicates that females would prefer male offspring, Fisher's principle explains why the sex ratio is most often 1:1. Sexual selection is
Sexual_selection
Postulate in biology
capacity as a parental caregiver, territory and any nuptial gifts. Fisher's principle means that the sex ratio (except in certain eusocial insects) is always
Sexy_son_hypothesis
Search algorithm
strategy Games Chicken Stag hunt Applications Cultural group selection Fisher's principle Mobbing Terminal investment hypothesis Key people John Maynard Smith
Alpha–beta_pruning
Hungarian and American mathematician and physicist (1903–1957)
Other minor results from his early career include a proof of a maximum principle for the gradient of a minimizing function in the field of calculus of
John_von_Neumann
Mathematical models of strategic interactions
strategies: the open-loop strategies are found using the Pontryagin maximum principle while the closed-loop strategies are found using Bellman's Dynamic Programming
Game_theory
Overuse of a shared resource
prevent the inevitable tragedy (he argued) it was necessary to reject the principle (supposedly enshrined in the Universal Declaration of Human Rights) according
Tragedy_of_the_commons
Concept in genetics
allele frequency is autocorrelated across generations. The Hardy–Weinberg principle states that the distribution of two alleles in a diploid population will
Genetic_drift
Trait that determines an organism's sexually reproductive function
is the ratio of males to females in a population. As explained by Fisher's principle, for evolutionary reasons this is usually about equal in species which
Biological_sex
Weakly optimal allocation of resources
social choice theory, the same concept is sometimes called the unanimity principle, which says that if everyone in a society (non-strictly) prefers A to
Pareto_efficiency
Situation where total gains match total losses
is also an example of a zero-sum game. This is because the fundamental principle of these contracts is that they are agreements between two parties, and
Zero-sum_game
Solution concept of a non-cooperative game
coordination game). Other applications include traffic flow (see Wardrop's principle), how to organize auctions (see auction theory), the outcome of efforts
Nash_equilibrium
Standard example in game theory
strategy Games Chicken Stag hunt Applications Cultural group selection Fisher's principle Mobbing Terminal investment hypothesis Key people John Maynard Smith
Prisoner's_dilemma
Concept in game theory
strategy Games Chicken Stag hunt Applications Cultural group selection Fisher's principle Mobbing Terminal investment hypothesis Key people John Maynard Smith
Focal_point_(game_theory)
Model of conflict for two players in game theory
snowdrift game, is a model of conflict for two players in game theory. The principle of the game is that while the ideal outcome is for one player to yield
Chicken_(game)
Israeli-American psychologist and economist (1934–2024)
strategy Games Chicken Stag hunt Applications Cultural group selection Fisher's principle Mobbing Terminal investment hypothesis Key people John Maynard Smith
Daniel_Kahneman
1976 book by Richard Dawkins
choosy in their mates, and select for attractive traits in males. Fisher's principle explains why a 50:50 ratio of males to females is evolutionarily stable
The_Selfish_Gene
Hand game for two players or more
2025-12-08. Fisher, Len (2008). Rock, Paper, Scissors: Game Theory in Everyday Life. Basic Books. p. 92. ISBN 978-0-7867-2693-6. Fisher, Len (2008).
Rock_paper_scissors
Principle used in information theory
In information theory, the principle of minimum Fisher information (MFI) is a variational principle which, when applied with the proper constraints needed
Minimum_Fisher_information
Diplomatic policy of concessions
if they were attacked by Germany. The Soviets supported Lithuania in principle but did not wish to disrupt their relations with Germany since they were
Appeasement
Proof all ranked voting rules have spoilers
no such rule can satisfy independence of irrelevant alternatives, the principle that a choice between two alternatives A and B should not depend on the
Arrow's_impossibility_theorem
English saying meaning "equivalent retaliation"
strategy Games Chicken Stag hunt Applications Cultural group selection Fisher's principle Mobbing Terminal investment hypothesis Key people John Maynard Smith
Tit_for_tat
Statistical principle
the algorithmic sufficient statistic. The concept is due to Sir Ronald Fisher in 1920. Stephen Stigler noted in 1973 that the concept of sufficiency had
Sufficient_statistic
Concept in game theory
revelation principle comes in two variants corresponding to the two flavors of incentive-compatibility: The dominant-strategy revelation-principle says that
Incentive_compatibility
Concept in game theory
w(S)=\sum _{R\subseteq S}(-1)^{|S|-|R|}v(R)} using the Inclusion exclusion principle. The Shapley values are given in terms of the synergy function by φ i
Shapley_value
strategy Games Chicken Stag hunt Applications Cultural group selection Fisher's principle Mobbing Terminal investment hypothesis Key people John Maynard Smith
Implementation_theory
Solution concept in game theory
MacArthur and W. D. Hamilton's work on sex ratios, derived from Fisher's principle, especially Hamilton's (1967) concept of an unbeatable strategy. Maynard
Evolutionarily stable strategy
Evolutionarily_stable_strategy
Book by Ronald Aylmer Fisher
such as Fisherian runaway, Fisher's principle, reproductive value, Fisher's fundamental theorem of natural selection, Fisher's geometric model, the sexy
The Genetical Theory of Natural Selection
The_Genetical_Theory_of_Natural_Selection
Political model of international conflict resolution
strategy Games Chicken Stag hunt Applications Cultural group selection Fisher's principle Mobbing Terminal investment hypothesis Key people John Maynard Smith
Two-level_game_theory
Israeli psychologist (1937–1996)
strategy Games Chicken Stag hunt Applications Cultural group selection Fisher's principle Mobbing Terminal investment hypothesis Key people John Maynard Smith
Amos_Tversky
2000 book by Randy Thornhill and Craig T. Palmer
selection Coevolution Cultural group selection Dual inheritance theory Fisher's principle Group selection Hologenome theory Lamarckism Population Punctuated
A_Natural_History_of_Rape
Field of economics and game theory
revelation principle, no matter the mechanism a designer can confine attention to equilibria in which agents truthfully report type. The revelation principle states:
Mechanism_design
Pairing where no unchosen pair prefers each other over their choice
strategy Games Chicken Stag hunt Applications Cultural group selection Fisher's principle Mobbing Terminal investment hypothesis Key people John Maynard Smith
Stable_matching_problem
Concept in economics and game theory
strategy Games Chicken Stag hunt Applications Cultural group selection Fisher's principle Mobbing Terminal investment hypothesis Key people John Maynard Smith
Global_game
Game whose outcome can be correctly predicted
strategy Games Chicken Stag hunt Applications Cultural group selection Fisher's principle Mobbing Terminal investment hypothesis Key people John Maynard Smith
Solved_game
Model of humans as rational, self-interested agents
strategy Games Chicken Stag hunt Applications Cultural group selection Fisher's principle Mobbing Terminal investment hypothesis Key people John Maynard Smith
Homo_economicus
Zero-sum game where competitions between strategies contain a cycle
strategy Games Chicken Stag hunt Applications Cultural group selection Fisher's principle Mobbing Terminal investment hypothesis Key people John Maynard Smith
Intransitive_game
Decrease in severity of conflicts
strategy Games Chicken Stag hunt Applications Cultural group selection Fisher's principle Mobbing Terminal investment hypothesis Key people John Maynard Smith
De-escalation
Hand game for two or more players
strategy Games Chicken Stag hunt Applications Cultural group selection Fisher's principle Mobbing Terminal investment hypothesis Key people John Maynard Smith
Chopsticks_(hand_game)
Complete plan on how a game player will behave in every possible game situation
strategy Games Chicken Stag hunt Applications Cultural group selection Fisher's principle Mobbing Terminal investment hypothesis Key people John Maynard Smith
Strategy_(game_theory)
Incomplete-information coordination game
strategy Games Chicken Stag hunt Applications Cultural group selection Fisher's principle Mobbing Terminal investment hypothesis Key people John Maynard Smith
Electronic_mail_game
Situation where all parties are worse off
strategy Games Chicken Stag hunt Applications Cultural group selection Fisher's principle Mobbing Terminal investment hypothesis Key people John Maynard Smith
No-win_situation
Finding an optimal algorithm for playing chess
playing a perfect game (i.e. solving chess): "With chess it is possible, in principle, to play a perfect game or construct a machine to do so as follows: One
Solving_chess
Change in the heritable traits of populations
competition between species for limited resources (the competitive exclusion principle). If one species can out-compete another, this could produce species selection
Evolution
Game theory scenario
strategy Games Chicken Stag hunt Applications Cultural group selection Fisher's principle Mobbing Terminal investment hypothesis Key people John Maynard Smith
Win–win_game
Variation of minimax game tree search
strategy Games Chicken Stag hunt Applications Cultural group selection Fisher's principle Mobbing Terminal investment hypothesis Key people John Maynard Smith
Negamax
Conflict between safety and cooperation
strategy Games Chicken Stag hunt Applications Cultural group selection Fisher's principle Mobbing Terminal investment hypothesis Key people John Maynard Smith
Stag_hunt
Condition in economics and game theory
strategy Games Chicken Stag hunt Applications Cultural group selection Fisher's principle Mobbing Terminal investment hypothesis Key people John Maynard Smith
Perfect_information
Problem about bus travel
strategy Games Chicken Stag hunt Applications Cultural group selection Fisher's principle Mobbing Terminal investment hypothesis Key people John Maynard Smith
Wait/walk_dilemma
Hungarian-American economist and philosopher (1920–2000)
strategy Games Chicken Stag hunt Applications Cultural group selection Fisher's principle Mobbing Terminal investment hypothesis Key people John Maynard Smith
John_Harsanyi
Type of perfect Bayesian equilibrium
strategy Games Chicken Stag hunt Applications Cultural group selection Fisher's principle Mobbing Terminal investment hypothesis Key people John Maynard Smith
Separating_equilibrium
Theories on the development of personality
lifespan perspectives of personality are based on the plasticity principle, the principle that personality traits are open systems that can be influenced
Personality_development
Problem in process of sharing surplus
Symmetry Scale-invariance Irrelevant-independence Resource-monotonicity Principle Proportional-fair rule Maximizing the product of surplus utilities Kalai–Smorodinsky
Cooperative_bargaining
Term in game theory
strategy Games Chicken Stag hunt Applications Cultural group selection Fisher's principle Mobbing Terminal investment hypothesis Key people John Maynard Smith
Move_by_nature
Economic model of competition
strategy Games Chicken Stag hunt Applications Cultural group selection Fisher's principle Mobbing Terminal investment hypothesis Key people John Maynard Smith
Bertrand_competition
Game in economic experiments
and potentially as subgame perfect equilibria. The one-shot deviation principle is used to verify SPE in these cases. Therefore, the conclusion that only
Ultimatum_game
Mathematical game
strategy Games Chicken Stag hunt Applications Cultural group selection Fisher's principle Mobbing Terminal investment hypothesis Key people John Maynard Smith
Guess_2/3_of_the_average
Game with a dominant mutually most beneficial action
strategy Games Chicken Stag hunt Applications Cultural group selection Fisher's principle Mobbing Terminal investment hypothesis Key people John Maynard Smith
Deadlock_(game_theory)
Making of satisfactory, not optimal, decisions
sciences) Homo economicus Memetics Neoclassical economics Organizing principle Parametric determinism Potential game § Bounded rational models Priority
Bounded_rationality
Cooperation between firms to limit competition
where competitors can independently set prices and market share. A core principle of antitrust policy is that companies must not communicate with each other
Collusion
Experimental tool
"rationally" and maximize their own payoffs, as shown by the homo economicus principle; however, it has been shown that human populations are more "benevolent
Dictator_game
Two player pursuit-evasion problem
strategy Games Chicken Stag hunt Applications Cultural group selection Fisher's principle Mobbing Terminal investment hypothesis Key people John Maynard Smith
Princess_and_monster_game
strategy Games Chicken Stag hunt Applications Cultural group selection Fisher's principle Mobbing Terminal investment hypothesis Key people John Maynard Smith
Fictitious_play
Solution concept in Game Theory
strategy Games Chicken Stag hunt Applications Cultural group selection Fisher's principle Mobbing Terminal investment hypothesis Key people John Maynard Smith
Cursed_equilibrium
Application of game theory to evolving populations in biology
Zahavi has developed this thinking in what is known as the "handicap principle", where superior competitors signal their superiority by a costly display
Evolutionary_game_theory
Tidal estuary on the Indus River in India and Pakistan
crossing over of fishers of both nations into each other's territories. In contrast to economic reasons described by India and Pakistan, fishers of both countries
Sir_Creek
Quality of a strategy in game theory
strategy Games Chicken Stag hunt Applications Cultural group selection Fisher's principle Mobbing Terminal investment hypothesis Key people John Maynard Smith
Strategic_dominance
Facilitating a peaceful outcome to a dispute
often through mediation. Accompanying conditions are described in Roger Fisher and William Ury's seminal 1981 book Getting to Yes: Negotiating Agreement
Conflict_resolution
strategy Games Chicken Stag hunt Applications Cultural group selection Fisher's principle Mobbing Terminal investment hypothesis Key people John Maynard Smith
List_of_games_in_game_theory
Combinatorial game theory theorem
strategy Games Chicken Stag hunt Applications Cultural group selection Fisher's principle Mobbing Terminal investment hypothesis Key people John Maynard Smith
Sprague–Grundy_theorem
Subset of a game; used in game theory
strategy Games Chicken Stag hunt Applications Cultural group selection Fisher's principle Mobbing Terminal investment hypothesis Key people John Maynard Smith
Subgame
Class of games where players choose their actions sequentially
strategy Games Chicken Stag hunt Applications Cultural group selection Fisher's principle Mobbing Terminal investment hypothesis Key people John Maynard Smith
Sequential_game
Game theory concept
strategy Games Chicken Stag hunt Applications Cultural group selection Fisher's principle Mobbing Terminal investment hypothesis Key people John Maynard Smith
Bayesian_game
Principle in economics and game theory
The revelation principle is a fundamental result in mechanism design, social choice theory, and game theory which shows it is always possible to design
Revelation_principle
Aspect of game theory
strategy Games Chicken Stag hunt Applications Cultural group selection Fisher's principle Mobbing Terminal investment hypothesis Key people John Maynard Smith
Self-confirming_equilibrium
Human behavior pattern in which the participant takes on increasing risk
creep – Expansion of a project beyond its initial goals Planck's principle – Principle that scientific change is generational Replication crisis – Observed
Escalation_of_commitment
Level of information in economics and game theory
other by making them misinterpret one's decisions. Bayesian game Handicap principle Market impact Screening game Signaling game Small talk Trash-talk Levin
Complete_information
Game theory concept
one-shot deviation principle, are often used to verify SPE. Subgame perfect equilibrium necessarily satisfies the one-shot deviation principle and is always
Subgame_perfect_equilibrium
Economic model
influential economist, was unimpressed by Bertrand's critique. Later, Irving Fisher outlined a model of duopoly that was in line with Bertrand's critique, and
Cournot_competition
Simple mathematical game
strategy Games Chicken Stag hunt Applications Cultural group selection Fisher's principle Mobbing Terminal investment hypothesis Key people John Maynard Smith
Pirate_game
Tendency to overestimate in auctions
strategy Games Chicken Stag hunt Applications Cultural group selection Fisher's principle Mobbing Terminal investment hypothesis Key people John Maynard Smith
Winner's_curse
Game theory case weighing own/others' sacrifice
strategy Games Chicken Stag hunt Applications Cultural group selection Fisher's principle Mobbing Terminal investment hypothesis Key people John Maynard Smith
Volunteer's_dilemma
Type of stable matching problem
strategy Games Chicken Stag hunt Applications Cultural group selection Fisher's principle Mobbing Terminal investment hypothesis Key people John Maynard Smith
Stable_roommates_problem
Game whose payoffs depend on strategies as opposed to players
strategy Games Chicken Stag hunt Applications Cultural group selection Fisher's principle Mobbing Terminal investment hypothesis Key people John Maynard Smith
Symmetric_game
Game theory model of aggression
strategy Games Chicken Stag hunt Applications Cultural group selection Fisher's principle Mobbing Terminal investment hypothesis Key people John Maynard Smith
War_of_attrition_(game)
Analog of Pareto efficiency for situations with incomplete information
incentive to abide by that rule or accept that rule, then the revelation principle asserts that there is no mechanism by which this allocation rule can be
Bayesian_efficiency
Representation of a game in game theory
strategy Games Chicken Stag hunt Applications Cultural group selection Fisher's principle Mobbing Terminal investment hypothesis Key people John Maynard Smith
Normal-form_game
Statement that players know and also know that other players know (ad infinitum)
strategy Games Chicken Stag hunt Applications Cultural group selection Fisher's principle Mobbing Terminal investment hypothesis Key people John Maynard Smith
Common_knowledge_(logic)
Military strategy during the Cold War with regard to the use of nuclear weapons
strategy Games Chicken Stag hunt Applications Cultural group selection Fisher's principle Mobbing Terminal investment hypothesis Key people John Maynard Smith
Deterrence_theory
Type of signaling game
strategy Games Chicken Stag hunt Applications Cultural group selection Fisher's principle Mobbing Terminal investment hypothesis Key people John Maynard Smith
Lewis_signaling_game
Game-theoretic concept
costly signalling best explains signalling between animals (see Handicap principle, Signalling theory). This general belief has been receiving some challenges
Cheap_talk
Solution concept in Game Theory
strategy Games Chicken Stag hunt Applications Cultural group selection Fisher's principle Mobbing Terminal investment hypothesis Key people John Maynard Smith
Bayes_correlated_equilibrium
FISHERS PRINCIPLE
FISHERS PRINCIPLE
Boy/Male
Arabic
Wishes
Surname or Lastname
English
English : variant of Rusher.Americanized spelling of German Rischer, a nickname for a hasty or impetuous person, from an agent derivative of Middle High German rischen ‘to rush’.Americanized spelling of Swiss German Rüscher, a topographic name for someone who lived on a mountainside, from southern dialect risch ‘slope’, ‘mountainside’ + -er, suffix denoting an inhabitant.Americanized spelling of North German Rischer, a topographic name from Middle Low German risch ‘reed’, a topographic name for someone who lived where reeds grew.Anglicized form of Eastern German Rischar, a nickname from Sorbian rýsar ‘knight’.
Boy/Male
British, English
A Fisher King
Male
Yiddish
(פִיש×ֶעל) Yiddish name FISHEL means "little fish."
Surname or Lastname
English
English : patronymic from the Old Norse personal name Viðarr, composed of the elements vÃðr ‘wide’ + ar ‘warrior’.
Girl/Female
Hindu, Indian
Well Wishers
Girl/Female
Indian
Wishes
Boy/Male
Arthurian Legend
A Fisher king.
Girl/Female
Tamil
Alpitha | அலà¯à®ªà¯€à®¤à®¾
Wishes
Alpitha | அலà¯à®ªà¯€à®¤à®¾
Girl/Female
Indian, Sanskrit
Fisher Woman
Biblical
catching fish; fishery (inhabitants)
Girl/Female
Hindu, Indian
Queen of Fishes
Boy/Male
Anglo Saxon
Wishes.
Boy/Male
Arthurian Legend
A Fisher king.
Surname or Lastname
English
English : occupational name for a fisherman, Middle English fischer. The name has also been used in Ireland as a loose equivalent of Braden. As an American family name, this has absorbed cognates and names of similar meaning from many other European languages, including German Fischer, Dutch Visser, Hungarian Halász, Italian Pescatore, Polish Rybarz, etc.In a few cases, the English name may in fact be a topographic name for someone who lived near a fish weir on a river, from the Old English term fisc-gear ‘fish weir’.Jewish (Ashkenazic) : occupational name for a fisherman, Yiddish fisher, German Fischer.Irish : translation of Gaelic Ó Bradáin ‘descendant of Bradán’, a personal name meaning ‘salmon’. See Braden.Mistranslation of French Poissant, meaning ‘powerful’, but understood as poisson ‘fish’ (see Poisson), and assimilated to the more frequent English name.
Girl/Female
Indian, Malayalam
Wishes
Girl/Female
Tamil
Alpita | அலà¯à®ªà®¿à®¤à®¾
Wishes
Alpita | அலà¯à®ªà®¿à®¤à®¾
Surname or Lastname
Americanized spelling of German Discher ‘joiner’.English
Americanized spelling of German Discher ‘joiner’.English : occupational name for a maker or seller of dishes, from an agent derivative of Old English disc ‘dish’.Possibly a respelling of any of the names mentioned at Deshaw.
Girl/Female
Indian
Wishes
Girl/Female
Indian, Punjabi
God
FISHERS PRINCIPLE
FISHERS PRINCIPLE
Boy/Male
English
The fictional character Jorel father of Superman.
Girl/Female
Tamil
Shy
Girl/Female
Arabic, Hindu, Indian, Muslim
Beautiful
Surname or Lastname
English (Cornwall)
English (Cornwall) : perhaps, as Reaney suggests, a variant of Strutt.
Girl/Female
Tamil
Cleverness, Honesty, Brilliance, Efficient
Boy/Male
Hindu
Great
Girl/Female
Tamil
Vedavedya | வேதவிதà¯à®¯à®¾
Goddess Durga
Boy/Male
American, Celtic, Christian, German, Irish
Fiery; A Thinker; Form of Hugh; Small Fire
Boy/Male
British, English
From the Meadow's Edge
Surname or Lastname
English (Nottinghamshire)
English (Nottinghamshire) : habitational name from an unidentified place probably deriving its name from Old English rēad ‘red’ + Old Norse gata ‘road’. There is a Redgate Wood in Kirklington, Nottinghamshire, but this place name may be of comparatively recent origin.
FISHERS PRINCIPLE
FISHERS PRINCIPLE
FISHERS PRINCIPLE
FISHERS PRINCIPLE
FISHERS PRINCIPLE
n.
A genus of fishes comprising the archer fishes. See Archer fish.
n.
The business or practice of catching fish; fishing.
prep.
The ridge between the shoulder bones of a horse, at the base of the neck. See Illust. of Horse.
n.
A carnivorous animal of the Weasel family (Mustela Canadensis); the pekan; the "black cat."
n.
The right to take fish at a certain place, or in particular waters.
pl.
of Fishery
pl.
of Finch
n.
Fishing; fishery.
a.
Having, or abounding in, fins, as fishes; pertaining to fishes.
n.
A place for catching fish.
n.
One who wishes ill to another; an enemy.
pl.
of Fish
n.
One who fishes.
pl.
of Crayfish
n. pl.
A division of fishes including the mackerels, tunnies, and allied fishes.
a.
Abounding in fishes.
n.
A fishery.
n.
See Fisher, 2.
imp. & p. p.
of Fish
n.
One who wishes or desires; one who expresses a wish.