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Bet hedging (biology)

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secondary male mates are chosen through female choice. Scientists believe multiple paternity has evolved in response to virgin insemination by low quality secondary male mates who have not undergone selection through intrasexual fighting. Females have developed a mechanism for sperm precedence to retain control over offspring paternity and increase offspring fitness. Further examination of female genitalia has supported this hypothesis. The sierra dome spider exhibits this behavior as a form of genetic bet hedging, reducing the risk of producing low quality offspring and contracting venereal disease. This form of bet hedging is notably different than most other forms of bet hedging, as it has not arisen in response to environmental conditions, but rather it has arisen as a result of the species mating system.
412:, where it is thought that individuals are more likely to mate with individuals whose MHC is less similar to their own in order to produce variable offspring. In accordance with the bet hedging model, it has been found that the reproductive success of mating pairs of Atlantic salmon is environmentally dependent, where certain MHC constructs are only advantageous under specific environmental circumstances. Thus, this supports the evidence that MHC diversity is crucial for the long-term reproductive success of the parents, as the tradeoff for an initial decrease in short-term reproductive fitness is mediated by the survival of a few of their offspring in a variable environment. 343:. The daughter cells display either low PHB levels or high PHB levels, which are better suited to short and long-term starvation, respectively. It has been reported that the low-PHB must compete effectively for resources in order to survive, whereas the high-PHB cells can survive for over a year without food. In this example, the PHB phenotype is being β€˜bet-hedged’, as the survivability of the offspring largely depends on their environment, where only one phenotype is likely to survive under specific conditions. 512:, variation exists in the distribution of growth rates among yeast micro-colonies and that slow growth is a predictor of resistance to heat. Tsl1 is one gene that was determined as a factor in this resistance. The abundance of this gene was shown to correlate with heat and stress resistance, and thus survival of the yeast micro-colonies under harsh conditions by using bet hedging. This illustrates that by using bet hedging, pathogenic strains of this yeast that are harmful to humans are more difficult to treat. 168: 28: 113:
this strategy actually invest in several different strategies at once, resulting in low variation in long-term success. This could be demonstrated by a clutch of eggs of different sizes, each optimal for one potential environment of the offspring. While this means that offspring specialized for another environment are less likely to survive to adulthood, it also protects against the possibility of no offspring surviving to the next year.
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are able to display this phenomenon quite nicely due to their ability to reproduce quickly enough to track evolution in a single population over a short period of time. This rapid rate of reproduction has allowed for the study of bet hedging in labs through experimental evolution models. These models
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The good year specialist has the highest fitness during a good year but does very poorly during a bad year, while the reverse is true for a bad year specialist. The conservative bet hedger does equally well in all years and the diversified bet hedger in this example uses the two specialist strategies
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In conservative bet hedging, individuals lower their expected fitness in exchange for a lower variance in fitness. The idea of this strategy is for an organism to "always play it safe" by using the same successful low-risk strategy regardless of environmental conditions. An example of this would be
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Variance in egg size is an example of bet-hedging. Fitness may be maximized by producing many, small eggs and thus many offspring. However, larger eggs may help offspring survive stressful conditions. Producing a range of egg sizes can both ensure that some offspring survive stressful conditions, and
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The classic example of bet hedging, delayed seed germination, has been extensively studied in desert annuals. One four-year field study found that populations in historically worse (drier) environments had lower germination rates. They also found a large range of germination dates and flexibility in
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Bet hedging is employed in fungi similarly to bacteria, but in fungi, it is more complex. This phenomenon is beneficial to fungi, but in some cases, it has harmful effects on humans, illustrating that bet hedging has clinical importance. One study suggests that bet hedging may even contribute to the
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cycles have been shown to mediate the timing of torpor and reproduction, and in mice have been shown to mediate this process entirely, heedless to the environment. In the marsupial species, however, an adaptive coin flipping mechanism is employed where neither torpor nor reproduction are affected by
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Bet hedging is understood to be a mode of response to environmental change. Adaptations that allow organisms to survive in fluctuating environmental conditions provide an evolutionary advantage. While a bet hedging trait may not be optimal for any one environment, this is outweighed by the benefits
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In contrast to conservative bet hedging, diversified bet hedging occurs when individuals lower their expected fitness in a given year while also increasing the variance of survival between offspring. This strategy uses the idea of not "putting all of your eggs in a basket." Individuals implementing
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is maximized for that year if all of its seeds germinate. However, if a drought occurs that kills germinated plants, but not ungerminated seeds, plants with seeds remaining in the seed bank will have a fitness advantage. Therefore, it can be advantageous for plants to "hedge their bets" in case of a
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an aquatic crustacean species found in many ponds of the Northeast United States, is one of the most well-studied examples of bet hedging. This species uses a form of diversified bet hedging called germ banking, in which emergence timing among offspring from a single clutch is highly variable. This
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A common example used when describing bet hedging is comparing the arithmetic and geometric fitness between specialist and bet hedging genotypes. The table below shows the relative fitness of four phenotypes in 'good' and 'bad' years and their respective means if 'good' years occur 75% of the time
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An individual using this type of bet hedging chooses what strategy to use based on a prediction of what the environment will be like. Organisms using this form of bet hedging make these predictions and select strategies annually. For example, an organism may produce clutches of different egg sizes
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production of dormant eggs peaks just before the annual dry season in June when ponds levels decrease. In permanent ponds, dormant egg production increases in March, just before an annual increase in feeding activity of sunfish. This example demonstrates that germ banking may take different forms
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It is also important to realize that the fitness of any strategy is dependent on a large number of factors, such as the ratio of good to bad years and its relative fitness between good and bad years. Small changes in the strategies or environment having a large impact on which is optimal. In the
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In this example, fitness is approximately equal within the specialist and bet hedger strategies, with the bet hedgers having a significantly higher fitness than the specialists. While the good year specialist' has the highest arithmetic mean, the bet hedging strategies are still preferred due to
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One way fungi use bet hedging is by displaying different colony morphologies when grown on agar plates. This variation allows for colonies with different morphologies, including resistances that allow them to survive, to thrive and reproduce in different conditions or environments. As a result,
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are polyandrous, mating with secondary males in order to compensate for uncertainty regarding the quality of the primary mate. Primary male mates are considered to be of higher fitness than secondary males, as primary mates must overcome intrasexual fighting prior to mating with a female, while
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Prokaryotic persistence as a method of bet hedging is thus of importance to the field of medicine due to bacterial persistence. Because bet hedging produces phenotypically diverse offspring randomly in order to survive catastrophic conditions, it is difficult to develop treatments for bacterial
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The evolution of an allele that is deleterious in a normal environment (white) but advantageous in an alternate environment (grey). The bet-hedging allele arises twice due to mutation. The first occurrence is lost before the environment changes, but the second mutant reaches fixation due to the
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Eukaryotic bet hedging models, unlike prokaryotic models, tend to be used to study more complex evolutionary processes. In the context of eukaryotes, bet hedging is best used as a way to analyze complex environmental influences affecting the selective pressures underlying the principle of bet
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Bet hedging through a seed bank has also been implicated in the persistence of weeds. One study of twenty weed species showed that the percentage of viable seeds after 5 years increased with soil depth, and germination rates decreased with soil depth (although specific numbers varied between
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Plants provide simple examples for studying bet hedging in wildlife, allowing for field studies but without as many confounding factors as animals. Studying closely related plant species can help us understand more about the circumstances under which bet hedging evolves.
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above example, the diversified bet hedger outweighs the conservative bet hedger if it uses the good year specialist strategy more often. In contrast, if the relative fitness of the good year specialist was 0.35 in a bad year, it becomes the optimal strategy.
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from year to year, increasing variation in offspring success between clutches. Unlike conservative and diversified bet hedging strategies, adaptive coin flipping is not concerned with minimizing the variation in fitness between years.
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To determine if a bet hedging allele is favored, the long-term fitness of each allele must be compared. Particularly in highly variable environments where bet hedging is likely to evolve, long-term fitness is best measured using the
408:(MHC)-dependent mating systems, which have been shown in other species to be important for determining disease resistance among offspring. Namely, there is evidence that selection for increased MHC diversity is a strong influence on 361:, they will produce both cells with normal cell growth and another population of persisters to continue this cycle as the case may be. The ability to switch between the persister and normal phenotype is a form of bet-hedging. 543:. Other studies of desert annuals have also found a relationship between temporal variation and lower germination rates. One of these studies also found the density of seeds in the seed bank to affect germination rates. 356:
exist with the ability to arrest their growth, which leaves them unaffected by dramatic changes to the environment. Once the persister cells grow to form another population of its species, which may or may not be
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occurs when organisms suffer decreased fitness in their typical conditions in exchange for increased fitness in stressful conditions. Biological bet hedging was originally proposed to explain the observation of a
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with variation in their dormancy because non-dormant ascospores can be killed by heat, but dormant ascospores will survive. The only con is that it will take longer for the dormant ascospores to be germinated.
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McAllan, B. M.; Feay, N.; Bradley, A. J.; Geiser, F. (2012). "The influence of reproductive hormones on the torpor patterns of the marsupial sminthopsis macroura: Bet-hedging in an unpredictable environment".
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long enough for alternative environments, in which the bet hedger has an advantage over genotypes adapted to the previous environment, to occur. Over many subsequent environmental alternations, selection may
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result in it having an expected geometric mean of zero. This makes it appropriate for circumstances where a single genotype may have variable fitness depending on environmental circumstances.
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Collectively, these findings do provide evidence for bet hedging in plants, but also show the importance of competition and phenotypic plasticity that simple bet hedging models often ignore.
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Experiments in bet hedging using prokaryotic model organisms provide some of the most simplified views of the evolution of bet hedging. As bet hedging involves a stochastic switching between
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In bet-hedging species, seed dormancy appears correlated "to a higher polyphenol (flavonoid) content in seed coats, resulting in darker morphs (Gianella et al., 2021)." In barrel medick (
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Graph depicting the relative fitness of the strategies shown in the table based on the probability of a bad year. Note that any strategy may be the most fit depending on this value.
454:, germ banking occurs when parents produce dormant eggs prior to annual environmental shifts that yield increased risk for developing offspring. For example, in temporary ponds, 502:
While bet hedging in fungi is important, not much is known about the mechanisms for the different strategies employed by different species. Researchers have studied
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Gremer, Jennifer R.; Venable, D. Lawrence (2014-03-01). "Bet hedging in desert winter annual plants: optimal germination strategies in a variable environment".
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within a species depending on the environmental risk presented. Bet hedging through variable egg hatching patterns are seen in other crustaceans as well.
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Philippi, Thomas (1993-09-01). "Bet-Hedging Germination of Desert Annuals: Variation Among Populations and Maternal Effects in Lepidium lasiocarpum".
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tend to be favored in more variable environments. In order for a bet hedging allele to spread, it must persist in the typical environment through
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stores carbon and energy in a compound known as poly-3-hydroxybutyrate (PHB) in order to withstand carbon-deficient environments. When starved,
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Roberts, H. A.; Feast, Patricia M. (1972-12-01). "Fate of Seeds of Some Annual Weeds in Different Depths of Cultivated and Undisturbed Soil".
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drought by producing some seeds that germinate immediately and other seeds that lie dormant. Other examples of biological bet hedging include
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There are three categories (strategies) of bet-hedging: "conservative" bet-hedging, "diversified" bet-hedging, and "adaptive coin flipping."
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Watson, Paul J. (1991-02-01). "Multiple paternity as genetic bet-hedging in female sierra dome spiders, Linyphia litigiosa (Linyphiidae)".
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species). This indicates that weeds will engage in bet hedging at higher rates in circumstances where the costs of bet hedging are lower.
1270:"Mate choice for major histocompatibility complex genetic divergence as a bet-hedging strategy in the atlantic salmon (salmo salar)" 434:
species makes a more active decision about when to use torpor that is better-suited to the uncertain environment in which it lives.
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Evans, Margaret E K; Dennehy, John J (2005-12-01). "Germ Banking: Bet‐Hedging and Variable Release from Egg and Seed Dormancy".
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Clauss, M. J.; Venable, D. L. (2000-02-01). "Seed Germination in Desert Annuals: An Empirical Test of Adaptive Bet Hedging".
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Invertebrate bet-hedging has also been observed in the mating systems of some species of spider. Female sierra dome spiders (
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with a constant egg size that may not be optimal for any environmental condition, but result in the lowest overall variance.
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many years after the original infection. The delay with which shingles emerges has been explained as a form of bet hedging.
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fungal infections may be more difficult to treat if bet hedging is involved. For example, pathogenic strains of yeast like
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Beaumont, H. J. E.; Kost, C.; Rainey, P. B.; Gallie, J.; Ferguson, G. C. (2009). "Experimental evolution of bet hedging".
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reduces the potential costs of a catastrophic event during a particularly vulnerable time in offspring development. In
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each 50% of the time; they perform better than the conservative bet hedger in good years, but worse during a bad year.
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infections, as bet hedging may ensure the survival of its species within its host, heedless to the antibiotic used.
348: 358: 1457:"Ectoparasitic Argulus coregoni (Crustacea: Branchiura) Hedge Their Bets: Studies on Egg Hatching Dynamics" 1362: 584: 327: 1638:"Experimental evolution of bet hedging under manipulated environmental uncertainty in Neurospora crassa" 540: 139:. The geometric mean is highly sensitive to small values. Even rare occurrences of zero fitness for a 1219: 1093:
Seger, Jon; Brockmann, H. Jane (1987). "What is bet-hedging?". In Harvey, P. H.; Partridge, L. (eds.).
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hedging. However, because Eukarya is a broad category, this section has been subdivided into kingdoms
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A group of researchers studied another way bet hedging is used by looking at the ascomycete fungus
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failure of chemotherapy in cancer due to mechanisms similar to that of bet hedging used in fungi.
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using this strategy will resist treatments. These fungi are known to cause an infection known as
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strategy in order to reduce their metabolic rate to survive environmental changes. Reproductive
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Within prokarya, there are a multitude of bet hedging examples. In one example, the bacterium
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Cohen, Dan (1966-09-01). "Optimizing reproduction in a randomly varying environment".
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to determine the mechanism of bet hedging in this species. It was determined that in
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Philippi, Tom; Seger, Jon (1989). "Hedging one's evolutionary bets, revisited".
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germination for drier populations when exposed to rain, a phenomenon known as
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Many invertebrate species are known to exhibit various forms of bet hedging.
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of higher fitness across a variety of environments. Therefore, bet hedging
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Dempster, Everett R. (1955-01-01). "Maintenance of Genetic Heterogeneity".
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Graham, Jeffrey K.; Smith, Myron L.; Simons, Andrew M. (22 July 2014).
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Hakalahti, Teija; HΓ€kkinen, Heli; Valtonen, E. Tellervo (2004-01-01).
1171:"Individual-level bet hedging in the bacterium sinorhizobium meliloti" 755:"Individual-Level Bet Hedging in the Bacterium Sinorhizobium meliloti" 335:
populations begin to display bet hedging by forming two non-identical
1097:. Vol. 4. Oxford, UK: Oxford University Press. pp. 182–211. 804:"Bacterial Persistence: A Model of Survival in Changing Environments" 580: 422: 383: 375: 148: 44:, or a reservoir of ungerminated seeds in the soil. For example, an 1928:
Stumpf, Michael P. H.; Laidlaw, Zoe; Jansen, Vincent A. A. (2002).
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Thus far, research on bet hedging involving species in the domain
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have been used to deduce the evolutionary origins of bet hedging.
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Evans, M. L.; Dionne, M.; Miller, K. M.; Bernatchez, L. (2012).
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A second example among vertebrates is the marsupial species
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Levy, Sasha F.; Ziv, Naomi; Siegal, Mark L. (8 May 2012).
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New Phytologist: International Journal of Plant Science
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Proceedings of the Royal Society B: Biological Sciences
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Proceedings of the Royal Society B: Biological Sciences
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Ratcliff, William C.; Denison, R. Ford (2010-10-12).
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Huss, Jessica C.; Gierlinger, Notburga (June 2021).
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Bet hedging has been used to explain the latency of
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that many offspring are produced in good conditions.
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Proceedings of the National Academy of Sciences USA
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Cold Spring Harbor Symposia on Quantitative Biology
1218:Veening, J.; Smits, W. K.; Kuipers, O. P. (2008). 860:Olofsson, H.; Ripa, J.; Jonzen, N. (27 May 2009). 430:manipulation of hormones, suggesting that this 1009:King, Oliver D.; Masel, Joanna (2007-12-01). 521:. It was observed that this species produces 8: 855: 853: 851: 849: 847: 352:. In a given population of this bacteria, 1971: 1953: 1904: 1661: 1612: 1602: 1558: 1548: 1472: 1431: 1366: 1293: 1186: 1137: 1034: 985: 885: 827: 770: 721: 346:Another example of bet hedging arises in 1169:Ratcliff, W. C.; Denison, R. F. (2010). 174: 166: 1874: 1872: 603: 1239:10.1146/annurev.micro.62.081307.163002 1095:Oxford surveys in evolutionary biology 77:presence of the alternate environment. 1793: 1791: 1789: 1737: 1735: 1683: 1681: 1580: 1578: 1533:"Yeast Survive by Hedging Their Bets" 1320:General and Comparative Endocrinology 7: 609: 607: 1855:10.1111/j.1365-3180.1972.tb01226.x 25: 1930:"Herpes Viruses Hedge Their Bets" 1060:Trends in Ecology & Evolution 591:at first infection and can cause 404:) have been hypothesized to have 164:and 'bad' years 25% of the time. 1997: 1474:10.1111/j.0030-1299.2004.13213.x 1274:Proceedings: Biological Sciences 958:Proceedings: Biological Sciences 952:Simons, Andrew M. (2011-06-07). 675:10.1046/j.1440-1703.2001.00423.x 571:has not been easily accessible. 406:major histocompatibility complex 1881:"Functional packaging of seeds" 1355:The Quarterly Review of Biology 802:Kussell, E. (31 January 2005). 69:in the presence of antibiotics. 1414:Radzikowski, J. (2013-07-01). 1139:11858/00-001M-0000-002A-07D3-B 1015:Theoretical Population Biology 616:Journal of Theoretical Biology 1: 2025:Evolutionary biology concepts 1531:Meadows, Robin (8 May 2012). 1510:10.1016/S0003-3472(05)80486-5 1227:Annual Review of Microbiology 296:their higher geometric mean. 1604:10.1371/journal.pbio.1001325 1550:10.1371/journal.pbio.1001327 1420:Journal of Plankton Research 1072:10.1016/0169-5347(89)90138-9 636:10.1016/0022-5193(66)90188-3 1332:10.1016/j.ygcen.2012.08.024 923:10.1101/SQB.1955.020.01.005 820:10.1534/genetics.104.035352 657:Yasui, Yukio (2001-12-01). 2041: 349:Mycobacterium tuberculosis 1188:10.1016/j.cub.2010.08.036 1027:10.1016/j.tpb.2007.08.006 772:10.1016/j.cub.2010.08.036 723:10.1016/j.cub.2008.08.028 179: 704:Burns, James G. (2008). 160:the allele to fixation. 95:Conservative bet hedging 1744:The American Naturalist 1690:The American Naturalist 587:, for instance, causes 108:Diversified bet hedging 57:, foraging behavior in 1955:10.1073/pnas.232546899 1654:10.1098/rspb.2014.0706 1286:10.1098/rspb.2011.0909 970:10.1098/rspb.2011.0176 878:10.1098/rspb.2009.0500 585:Varicella Zoster Virus 328:Sinorhizobium meliloti 172: 117:Adaptive coin flipping 100:an organism producing 78: 61:, nutrient storage in 55:female multiple mating 37:Biological bet hedging 33: 2004:Bet hedging (biology) 1433:10.1093/plankt/fbt032 541:phenotypic plasticity 170: 75: 67:bacterial persistence 30: 18:Bet-hedging (biology) 2006:at Wikimedia Commons 456:Diaptomus sanguineus 452:Diaptomus sanguineus 445:Diaptomus sanguineus 359:antibiotic resistant 317:across generations, 2020:Biological theorems 1946:2002PNAS...9915234S 1940:(23): 15234–15237. 1130:10.1038/nature08504 1122:2009Natur.462...90B 964:(1712): 1601–1609. 872:(1669): 2963–2969. 663:Ecological Research 628:1966JThBi..12..119C 553:Medicago truncatula 418:Sminthopsis macrour 1648:(1787): 20140706. 465:Linyphia litigiosa 173: 79: 34: 2002:Media related to 1897:10.1111/nph.17299 1812:10.1111/ele.12241 1280:(1727): 379–386. 1181:(19): 1740–1744. 765:(19): 1740–1744. 716:(20): R953–R954. 518:Neurospora crassa 394:In example, West 289: 288: 16:(Redirected from 2032: 2001: 1986: 1985: 1975: 1957: 1925: 1919: 1918: 1908: 1891:(6): 2154–2163. 1876: 1867: 1866: 1838: 1832: 1831: 1795: 1784: 1783: 1739: 1730: 1729: 1685: 1676: 1675: 1665: 1633: 1627: 1626: 1616: 1606: 1582: 1573: 1572: 1562: 1552: 1528: 1522: 1521: 1498:Animal Behaviour 1493: 1487: 1486: 1476: 1452: 1446: 1445: 1435: 1411: 1405: 1404: 1370: 1350: 1344: 1343: 1314: 1308: 1307: 1297: 1265: 1259: 1258: 1224: 1215: 1209: 1208: 1190: 1166: 1160: 1159: 1141: 1105: 1099: 1098: 1090: 1084: 1083: 1055: 1049: 1048: 1038: 1006: 1000: 999: 989: 949: 943: 942: 906: 900: 899: 889: 857: 842: 841: 831: 814:(4): 1807–1814. 799: 793: 792: 774: 750: 744: 743: 725: 701: 695: 694: 654: 648: 647: 611: 492:Candida glabrata 486:Candida albicans 175: 21: 2040: 2039: 2035: 2034: 2033: 2031: 2030: 2029: 2010: 2009: 1994: 1989: 1927: 1926: 1922: 1878: 1877: 1870: 1840: 1839: 1835: 1800:Ecology Letters 1797: 1796: 1787: 1741: 1740: 1733: 1687: 1686: 1679: 1635: 1634: 1630: 1597:(5): e1001325. 1584: 1583: 1576: 1543:(5): e1001327. 1530: 1529: 1525: 1495: 1494: 1490: 1454: 1453: 1449: 1413: 1412: 1408: 1368:10.1.1.587.7117 1352: 1351: 1347: 1316: 1315: 1311: 1267: 1266: 1262: 1222: 1217: 1216: 1212: 1175:Current Biology 1168: 1167: 1163: 1116:(7269): 90–93. 1107: 1106: 1102: 1092: 1091: 1087: 1057: 1056: 1052: 1008: 1007: 1003: 951: 950: 946: 908: 907: 903: 859: 858: 845: 801: 800: 796: 759:Current Biology 752: 751: 747: 710:Current Biology 703: 702: 698: 656: 655: 651: 613: 612: 605: 601: 577: 565: 532: 476: 440: 396:Atlantic salmon 392: 371: 354:persister cells 311: 306: 253:Arithmetic mean 137:arithmetic mean 128: 119: 110: 97: 89: 84: 23: 22: 15: 12: 11: 5: 2038: 2036: 2028: 2027: 2022: 2012: 2011: 2008: 2007: 1993: 1992:External links 1990: 1988: 1987: 1920: 1868: 1849:(4): 316–324. 1833: 1806:(3): 380–387. 1785: 1756:10.1086/285551 1750:(3): 488–507. 1731: 1702:10.1086/303314 1696:(2): 168–186. 1677: 1628: 1574: 1523: 1504:(2): 343–360. 1488: 1467:(2): 295–302. 1447: 1426:(4): 707–723. 1406: 1377:10.1086/498282 1361:(4): 431–451. 1345: 1326:(2): 265–276. 1309: 1260: 1233:(1): 193–210. 1210: 1161: 1100: 1085: 1050: 1021:(4): 560–575. 1001: 944: 901: 843: 794: 745: 696: 669:(4): 605–616. 649: 622:(1): 119–129. 602: 600: 597: 576: 573: 564: 561: 531: 528: 475: 472: 439: 436: 421:, which use a 391: 388: 370: 367: 341:binary fission 337:daughter cells 310: 307: 305: 302: 287: 286: 283: 280: 277: 274: 272:Geometric mean 268: 267: 264: 261: 258: 255: 249: 248: 245: 242: 239: 236: 230: 229: 226: 223: 220: 217: 211: 210: 204: 198: 192: 186: 182: 181: 178: 133:geometric mean 127: 124: 118: 115: 109: 106: 96: 93: 88: 85: 83: 80: 24: 14: 13: 10: 9: 6: 4: 3: 2: 2037: 2026: 2023: 2021: 2018: 2017: 2015: 2005: 2000: 1996: 1995: 1991: 1983: 1979: 1974: 1969: 1965: 1961: 1956: 1951: 1947: 1943: 1939: 1935: 1931: 1924: 1921: 1916: 1912: 1907: 1902: 1898: 1894: 1890: 1886: 1882: 1875: 1873: 1869: 1864: 1860: 1856: 1852: 1848: 1844: 1843:Weed Research 1837: 1834: 1829: 1825: 1821: 1817: 1813: 1809: 1805: 1801: 1794: 1792: 1790: 1786: 1781: 1777: 1773: 1769: 1765: 1761: 1757: 1753: 1749: 1745: 1738: 1736: 1732: 1727: 1723: 1719: 1715: 1711: 1707: 1703: 1699: 1695: 1691: 1684: 1682: 1678: 1673: 1669: 1664: 1659: 1655: 1651: 1647: 1643: 1639: 1632: 1629: 1624: 1620: 1615: 1610: 1605: 1600: 1596: 1592: 1588: 1581: 1579: 1575: 1570: 1566: 1561: 1556: 1551: 1546: 1542: 1538: 1534: 1527: 1524: 1519: 1515: 1511: 1507: 1503: 1499: 1492: 1489: 1484: 1480: 1475: 1470: 1466: 1462: 1458: 1451: 1448: 1443: 1439: 1434: 1429: 1425: 1421: 1417: 1410: 1407: 1402: 1398: 1394: 1390: 1386: 1382: 1378: 1374: 1369: 1364: 1360: 1356: 1349: 1346: 1341: 1337: 1333: 1329: 1325: 1321: 1313: 1310: 1305: 1301: 1296: 1291: 1287: 1283: 1279: 1275: 1271: 1264: 1261: 1256: 1252: 1248: 1244: 1240: 1236: 1232: 1228: 1221: 1214: 1211: 1206: 1202: 1198: 1194: 1189: 1184: 1180: 1176: 1172: 1165: 1162: 1157: 1153: 1149: 1145: 1140: 1135: 1131: 1127: 1123: 1119: 1115: 1111: 1104: 1101: 1096: 1089: 1086: 1081: 1077: 1073: 1069: 1065: 1061: 1054: 1051: 1046: 1042: 1037: 1032: 1028: 1024: 1020: 1016: 1012: 1005: 1002: 997: 993: 988: 983: 979: 975: 971: 967: 963: 959: 955: 948: 945: 940: 936: 932: 928: 924: 920: 916: 912: 905: 902: 897: 893: 888: 883: 879: 875: 871: 867: 863: 856: 854: 852: 850: 848: 844: 839: 835: 830: 825: 821: 817: 813: 809: 805: 798: 795: 790: 786: 782: 778: 773: 768: 764: 760: 756: 749: 746: 741: 737: 733: 729: 724: 719: 715: 711: 707: 700: 697: 692: 688: 684: 680: 676: 672: 668: 664: 660: 653: 650: 645: 641: 637: 633: 629: 625: 621: 617: 610: 608: 604: 598: 596: 594: 590: 586: 583:viruses. The 582: 574: 572: 570: 562: 560: 557: 555: 554: 548: 544: 542: 536: 529: 527: 524: 520: 519: 513: 511: 510:S. cerevisiae 507: 506: 505:S. cerevisiae 500: 498: 494: 493: 488: 487: 480: 473: 471: 468: 466: 460: 457: 453: 448: 446: 438:Invertebrates 437: 435: 433: 428: 424: 420: 419: 413: 411: 407: 403: 402: 397: 389: 387: 385: 381: 377: 368: 366: 362: 360: 355: 351: 350: 344: 342: 338: 334: 330: 329: 323: 320: 316: 308: 303: 301: 297: 293: 284: 281: 278: 275: 273: 270: 269: 265: 262: 259: 256: 254: 251: 250: 246: 243: 240: 237: 235: 232: 231: 227: 224: 221: 218: 216: 213: 212: 209: 205: 203: 200:Conservative 199: 197: 193: 191: 187: 184: 183: 177: 176: 169: 165: 161: 159: 154: 153:genetic drift 150: 144: 142: 138: 134: 125: 123: 116: 114: 107: 105: 103: 94: 92: 86: 81: 74: 70: 68: 64: 60: 56: 51: 47: 43: 38: 29: 19: 1937: 1933: 1923: 1888: 1884: 1846: 1842: 1836: 1803: 1799: 1747: 1743: 1693: 1689: 1645: 1641: 1631: 1594: 1591:PLOS Biology 1590: 1540: 1537:PLOS Biology 1536: 1526: 1501: 1497: 1491: 1464: 1460: 1450: 1423: 1419: 1409: 1358: 1354: 1348: 1323: 1319: 1312: 1277: 1273: 1263: 1230: 1226: 1213: 1178: 1174: 1164: 1113: 1109: 1103: 1094: 1088: 1066:(2): 41–44. 1063: 1059: 1053: 1018: 1014: 1004: 961: 957: 947: 914: 910: 904: 869: 865: 811: 807: 797: 762: 758: 748: 713: 709: 699: 666: 662: 652: 619: 615: 578: 566: 558: 551: 549: 545: 537: 533: 516: 514: 509: 503: 501: 490: 484: 481: 477: 463: 461: 455: 451: 443: 441: 417: 414: 400: 393: 372: 363: 347: 345: 332: 326: 324: 312: 304:In organisms 298: 294: 290: 271: 252: 233: 214: 207: 206:Diversified 201: 195: 189: 162: 145: 129: 120: 111: 98: 90: 46:annual plant 36: 35: 497:candidiasis 410:mate choice 401:Salmo salar 390:Vertebrates 333:S. meliloti 319:prokaryotes 208:Bet hedger 202:Bet hedger 196:Specialist 190:Specialist 59:bumble bees 2014:Categories 599:References 589:chickenpox 523:ascospores 315:phenotypes 188:Good Year 185:Year Type 180:Phenotype 87:Categories 1964:0027-8424 1863:1365-3180 1820:1461-0248 1764:0003-0147 1710:0003-0147 1442:0142-7873 1385:0033-5770 1363:CiteSeerX 978:1471-2954 931:0091-7451 917:: 25–32. 683:1440-1703 432:marsupial 194:Bad Year 126:Evolution 42:seed bank 1982:12409612 1915:33629369 1828:24393387 1772:19425988 1718:10686159 1672:24870047 1623:22589700 1569:22589702 1518:53152243 1393:16519139 1340:22974513 1304:21697172 1247:18537474 1205:16856229 1197:20869244 1148:19890329 1080:21227310 1045:17915273 996:21411456 939:13433552 896:19474039 838:15687275 808:Genetics 789:16856229 781:20869244 740:16696224 732:18957249 691:34683958 593:shingles 376:Animalia 309:Prokarya 141:genotype 102:clutches 82:Overview 63:rhizobia 1942:Bibcode 1906:8252473 1726:4439415 1663:4071552 1614:3348152 1560:3348148 1483:3548212 1401:2343748 1295:3223684 1255:3747871 1156:4369450 1118:Bibcode 1036:2118055 987:3081777 887:2817213 829:1449587 644:6015423 624:Bibcode 575:Viruses 569:Archaea 563:Archaea 530:Plantae 427:hormone 380:Plantae 369:Eukarya 339:during 149:alleles 50:fitness 1980:  1973:137573 1970:  1962:  1913:  1903:  1861:  1826:  1818:  1780:498615 1778:  1770:  1762:  1724:  1716:  1708:  1670:  1660:  1621:  1611:  1567:  1557:  1516:  1481:  1440:  1399:  1391:  1383:  1365:  1338:  1302:  1292:  1253:  1245:  1203:  1195:  1154:  1146:  1110:Nature 1078:  1043:  1033:  994:  984:  976:  937:  929:  894:  884:  836:  826:  787:  779:  738:  730:  689:  681:  642:  581:Herpes 423:torpor 382:, and 285:0.763 282:0.763 279:0.707 276:0.707 266:0.768 263:0.763 260:0.723 257:0.813 247:0.625 244:0.763 228:0.815 225:0.763 65:, and 1776:S2CID 1722:S2CID 1514:S2CID 1479:JSTOR 1461:Oikos 1397:S2CID 1251:S2CID 1223:(PDF) 1201:S2CID 1152:S2CID 785:S2CID 736:S2CID 687:S2CID 474:Fungi 384:Fungi 238:0.25 222:0.63 158:sweep 1978:PMID 1960:ISSN 1911:PMID 1859:ISSN 1824:PMID 1816:ISSN 1768:PMID 1760:ISSN 1714:PMID 1706:ISSN 1668:PMID 1619:PMID 1565:PMID 1438:ISSN 1389:PMID 1381:ISSN 1336:PMID 1300:PMID 1243:PMID 1193:PMID 1144:PMID 1076:PMID 1041:PMID 992:PMID 974:ISSN 935:PMID 927:ISSN 892:PMID 834:PMID 777:PMID 728:PMID 679:ISSN 640:PMID 241:1.0 219:1.0 215:Good 1968:PMC 1950:doi 1901:PMC 1893:doi 1889:230 1851:doi 1808:doi 1752:doi 1748:142 1698:doi 1694:155 1658:PMC 1650:doi 1646:281 1609:PMC 1599:doi 1555:PMC 1545:doi 1506:doi 1469:doi 1465:107 1428:doi 1373:doi 1328:doi 1324:179 1290:PMC 1282:doi 1278:279 1235:doi 1183:doi 1134:hdl 1126:doi 1114:462 1068:doi 1031:PMC 1023:doi 982:PMC 966:doi 962:278 919:doi 882:PMC 874:doi 870:276 824:PMC 816:doi 812:169 767:doi 718:doi 671:doi 632:doi 489:or 234:Bad 48:'s 2016:: 1976:. 1966:. 1958:. 1948:. 1938:99 1936:. 1932:. 1909:. 1899:. 1887:. 1883:. 1871:^ 1857:. 1847:12 1845:. 1822:. 1814:. 1804:17 1802:. 1788:^ 1774:. 1766:. 1758:. 1746:. 1734:^ 1720:. 1712:. 1704:. 1692:. 1680:^ 1666:. 1656:. 1644:. 1640:. 1617:. 1607:. 1595:10 1593:. 1589:. 1577:^ 1563:. 1553:. 1541:10 1539:. 1535:. 1512:. 1502:41 1500:. 1477:. 1463:. 1459:. 1436:. 1424:35 1422:. 1418:. 1395:. 1387:. 1379:. 1371:. 1359:80 1357:. 1334:. 1322:. 1298:. 1288:. 1276:. 1272:. 1249:. 1241:. 1231:62 1229:. 1225:. 1199:. 1191:. 1179:20 1177:. 1173:. 1150:. 1142:. 1132:. 1124:. 1112:. 1074:. 1062:. 1039:. 1029:. 1019:72 1017:. 1013:. 990:. 980:. 972:. 960:. 956:. 933:. 925:. 915:20 913:. 890:. 880:. 868:. 864:. 846:^ 832:. 822:. 810:. 806:. 783:. 775:. 763:20 761:. 757:. 734:. 726:. 714:18 712:. 708:. 685:. 677:. 667:16 665:. 661:. 638:. 630:. 620:12 618:. 606:^ 499:. 386:. 378:, 1984:. 1952:: 1944:: 1917:. 1895:: 1865:. 1853:: 1830:. 1810:: 1782:. 1754:: 1728:. 1700:: 1674:. 1652:: 1625:. 1601:: 1571:. 1547:: 1520:. 1508:: 1485:. 1471:: 1444:. 1430:: 1403:. 1375:: 1342:. 1330:: 1306:. 1284:: 1257:. 1237:: 1207:. 1185:: 1158:. 1136:: 1128:: 1120:: 1082:. 1070:: 1064:4 1047:. 1025:: 998:. 968:: 941:. 921:: 898:. 876:: 840:. 818:: 791:. 769:: 742:. 720:: 693:. 673:: 646:. 634:: 626:: 467:) 447:, 398:( 20:)

Index

Bet-hedging (biology)

seed bank
annual plant
fitness
female multiple mating
bumble bees
rhizobia
bacterial persistence

clutches
geometric mean
arithmetic mean
genotype
alleles
genetic drift
sweep
Depending on the likelihood of a bad year, any strategy may be the most effective.
phenotypes
prokaryotes
Sinorhizobium meliloti
daughter cells
binary fission
Mycobacterium tuberculosis
persister cells
antibiotic resistant
Animalia
Plantae
Fungi
Atlantic salmon

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