Breeding games and dimorphism in male salmon

Tanaka, Yuzuru; Hayashi, Tarō; Miller, Donald G.; Tainaka, Kei–ichi; Yoshimura, Jin

doi:10.1016/j.anbehav.2009.01.039

Cited by 8 publications

(7 citation statements)

References 27 publications

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“…For example, males may or may not be aggressive (e.g., insects, Carroll 1993;pupfishes, Kodric-Brown 1996;squirrels, Koprowski 1993), guard females (e.g., insects, Thornhill and Alcock 1983;lizards, Zamudio and Sinervo 2000;wrasses, Alonzo and Warner 2000), or show differentiated phenotypes (e.g., hooknose and jacks in salmon species, Tanaka et al 2009). However, in a small group of species, including fiddler crabs (genus Uca), alternative mating tactics seem to be associated with a change in the sex that searches for mates (deRivera 2003).…”

Section: Introductionmentioning

confidence: 99%

Density affects mating mode and large male mating advantage in a fiddler crab

2010

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Fiddler crabs show two different mating modes: either females search and crabs mate underground in male burrows, or males search and crabs mate on the surface near female burrows. We explored the relationship between crab density, body size, the searching behavior of both sexes, and the occurrence of both mating modes in the fiddler crab Uca uruguayensis. We found that crabs change their mating mode depending on their size and crab density. Crabs mated mostly on the surface at low densities, and underground at high densities. The proportion of wandering receptive females but not courting males accounted for the variation in mating modes. This suggests that whether crabs mate underground (or on the surface) is determined by the presence (or absence) of searching females. We found that the change in the mating mode affected the level of assortative mating; males mating underground were bigger than those mating on the surface, suggesting active female choice. Given that fiddler crabs experience multiple reproductive cycles, they are prone to showing behavioral plasticity in their mating strategy whenever the payoffs of using different mating modes differ between reproductive events. Our results suggest that the incorporation of different levels of environmental variability may be important in theoretical models aimed at improving our understanding of the evolution of alternative mating tactics and strategies.

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Section: Introductionmentioning

confidence: 99%

Density affects mating mode and large male mating advantage in a fiddler crab

2010

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“…Our analysis revealed that male dimorphism is favored not only when the sneaker's advantage is high or when fighter costs are high but also when sneakers have a shorter maturation time and thereby higher maturation rate than fighters. This means that male dimorphism can evolve more easily in our model than in approaches based on classic game theory (Maynard Smith 1982;Tanaka et al 2009), in which differences in maturation time are not taken into account. Our analysis also showed that the effect of life-history differences on the evolutionary outcome can be enhanced by a high sneaker 's advantage (eq.…”

Section: The Role Of Demography In the Evolution Of Male Dimorphismmentioning

confidence: 99%

“…In interactions between fighters and sneakers, sneakers gain access to the female with probability , and fighters gain access to the female with probability . The pa-V Ϫ rameter is therefore the sneaker's advantage and poses a small cost to the fighters (note that is similar to the parameter G in the hooknose-jack payoff matrix of Tanaka et al 2009). In experimental or field studies, can be measured as the probability that sneakers are able to mate successfully when competing with fighters for access to females (e.g., Hutchings and Myers 1988;Hunt and Simmons 2001).…”

Section: Two-sex Population Modelmentioning

confidence: 99%

“…Despite the importance of life-history differences in male dimorphisms, these differences have also been left out in game-theoretic approaches to studying the evolution of male dimorphism (e.g., Maynard Smith 1982;Tanaka et al 2009). Classic game-theoretical models predict that male dimorphism occurs when the costs of fighting to fighters are higher than the reward (hawk-dove game; Maynard Smith 1982), and this condition is relaxed to a certain extent when sneakers adopt a sneaker strategy (Tanaka et al 2009).…”

Section: Introductionmentioning

confidence: 99%

“…Classic game-theoretical models predict that male dimorphism occurs when the costs of fighting to fighters are higher than the reward (hawk-dove game; Maynard Smith 1982), and this condition is relaxed to a certain extent when sneakers adopt a sneaker strategy (Tanaka et al 2009). However, it is unclear how life histories and competitive games interact to shape variation in the incidence of male dimorphism.…”

Section: Introductionmentioning

confidence: 99%

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Life-History Differences Favor Evolution of Male Dimorphism in Competitive Games

Smallegange

Johansson

2014

The American Naturalist

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Life history differences favour evolution of male dimorphism in competitive gamesSmallegange, I.M.; Johansson, J. General rightsIt is not permitted to download or to forward/distribute the text or part of it without the consent of the author(s) and/or copyright holder(s), other than for strictly personal, individual use, unless the work is under an open content license (like Creative Commons). Disclaimer/Complaints regulationsIf you believe that digital publication of certain material infringes any of your rights or (privacy) interests, please let the Library know, stating your reasons. In case of a legitimate complaint, the Library will make the material inaccessible and/or remove it from the website. Please Ask the Library: http://uba.uva.nl/en/contact, or a letter to: Library of the University of Amsterdam, Secretariat, Singel 425, 1012 WP Amsterdam, The Netherlands. You will be contacted as soon as possible. However, how differences in competitive ability and life history interact to determine male morph coexistence has not yet been investigated within a single framework. Here we integrate demography and game theory into a two-sex population model to study the evolution of strategies that result in the coexistence of fighters and sneakers. We incorporate differences in maturation time between the morphs and use a mating-probability matrix analogous to the classic hawk-dove game. Using adaptive dynamics, we show that male dimorphism evolves more easily in our model than in classic game theory approaches. Our results also revealed an interaction between life-history differences and sneaker competitiveness, which shows that demography and competitive games should be treated as interlinked mechanisms to understand the evolution of male dimorphism. Applying our approach to empirical data on bulb mites (Rhizoglyphus robini), coho salmon (Oncorhynchus kisutch), and bullhorned dung beetles (Onthophagus taurus) indicates that observed occurrences of male dimorphism are in general agreement with model predictions.

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Reproductive Behavior: Spawners

2020

Fish Behavior 2

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Breeding games and dimorphism in male salmon

Cited by 8 publications

References 27 publications

Density affects mating mode and large male mating advantage in a fiddler crab

Density affects mating mode and large male mating advantage in a fiddler crab

Life-History Differences Favor Evolution of Male Dimorphism in Competitive Games

Reproductive Behavior: Spawners

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