Abstract:
:Social group size may affect the potential for sperm competition, and this in turn may favour ontogenetic adjustments in testicular mass according to the likely requirements for sperm and spermatophore production. In a number of comparative analyses of testis mass among vertebrate species that differ in mating system or social organization, increasing potential for sperm competition is associated with larger testis size. Intraspecific phenotypic plasticity should be able to produce the same pattern if social group size is heterogenous and reflects differing degrees of average sperm competition, but this intraspecific effect is less well studied. We tested the effect of social groups on both male and female investment in the simultaneously hermaphroditic leech, Helobdella papillornata. Leeches were placed in groups of one, two, four or eight. Sexual investment at the onset of reproductive maturity was quantified as the total testisac volume for male function and total egg volume for female function. We found that testisac volume (statistically adjusted for body size) showed a significant increase with increasing group size. Total egg volume (also adjusted for body size) was unaffected by group size. Our findings indicate adaptive developmental plasticity in male gonad investment in response to the potential for sperm competition.
journal_name
J Evol Bioljournal_title
Journal of evolutionary biologyauthors
Tan GN,Govedich FR,Burd Mdoi
10.1111/j.1420-9101.2004.00692.xkeywords:
subject
Has Abstractpub_date
2004-05-01 00:00:00pages
574-80issue
3eissn
1010-061Xissn
1420-9101pii
JEB692journal_volume
17pub_type
杂志文章abstract::Phenotypes are the target of selection and affect the ability of organisms to persist in variable environments. Phenotypes can be influenced directly by genes and/or by phenotypic plasticity. The amphibian-killing fungus Batrachochytrium dendrobatidis (Bd) has a global distribution, unusually broad host range, and hig...
journal_title:Journal of evolutionary biology
pub_type: 杂志文章
doi:10.1111/jeb.13413
更新日期:2019-03-01 00:00:00
abstract::Mutagenic and epigenetic effects of environmental stressors and their transgenerational consequences are of interest to evolutionary biologists because they can amplify natural genetic variation. We studied the effect of parental exposure to radioactive contamination on offspring development in lesser marsh grasshoppe...
journal_title:Journal of evolutionary biology
pub_type: 杂志文章
doi:10.1111/j.1420-9101.2012.02502.x
更新日期:2012-06-01 00:00:00
abstract::It is a challenge to measure sexual selection because both stochastic events (chance) and deterministic factors (selection) generate variation in individuals' reproductive success. Most researchers realize that random events ('noise') make it difficult to detect a relationship between a trait and mating success (i.e. ...
journal_title:Journal of evolutionary biology
pub_type: 杂志文章
doi:10.1111/j.1420-9101.2011.02451.x
更新日期:2012-03-01 00:00:00
abstract::In mammalian evolutionary history, Cetacea (whales, dolphins and porpoises) achieved astonishing success by adapting to an aquatic environment. One unique characteristic of cetaceans, contributing to this adaptive success, is efficient lipid utilization. Here, we report a comparative genetic analysis of five aquatic a...
journal_title:Journal of evolutionary biology
pub_type: 杂志文章
doi:10.1111/jeb.13361
更新日期:2018-11-01 00:00:00
abstract::Hybridization is likely to occur more often between closely related taxa that have had insufficient time to diverge to the point of reproductive incompatibility; hybridization between deeply divergent lineages is rare. In squamate reptiles, hybridization has been proposed as a possible explanation for the extensive pa...
journal_title:Journal of evolutionary biology
pub_type: 杂志文章
doi:10.1111/jeb.13273
更新日期:2018-06-01 00:00:00
abstract::Any population whose members are subject to extrinsic mortality should exhibit an increase in mortality with age. Nevertheless, the prevailing opinion is that populations of adult damselflies and dragonflies do not exhibit such senescence. Here, we challenge this contention by fitting a range of demographic models to ...
journal_title:Journal of evolutionary biology
pub_type: 杂志文章
doi:10.1111/j.1420-9101.2010.02222.x
更新日期:2011-04-01 00:00:00
abstract::The recent invasion by self-replicating socially parasitic Cape honeybee workers, Apis mellifera capensis, of colonies of the neighbouring African subspecies Apis mellifera scutellata represents an opportunity to study evolution of intraspecific parasitism in real time. As honeybee workers compete pheromonally for rep...
journal_title:Journal of evolutionary biology
pub_type: 杂志文章
doi:10.1111/j.1420-9101.2007.01303.x
更新日期:2007-05-01 00:00:00
abstract::The cost of adaptations may depend on environmental conditions. We consider how the fitness cost of resistance to the herbicide triazine in Amaranthus hybridus interacts with folivory from the beetle Disonycha glabrata. Triazine-resistant (TR) genotypes suffer a fitness cost because of a pleiotropic reduction in the l...
journal_title:Journal of evolutionary biology
pub_type: 杂志文章
doi:10.1111/j.1420-9101.2004.00819.x
更新日期:2005-03-01 00:00:00
abstract::Parasites are ubiquitous and have well-documented ecological consequences. In contrast, the extent to which parasites drive phenotypic evolution in hosts remains obscure. We use a recently developed statistical technique--selective source analysis--to analyse the strength of phenotypic selection acting on floral trait...
journal_title:Journal of evolutionary biology
pub_type: 杂志文章
doi:10.1111/j.1420-9101.2008.01551.x
更新日期:2008-07-01 00:00:00
abstract::Studying the genetic architecture of sexual traits provides insight into the rate and direction at which traits can respond to selection. Traits associated with few loci and limited genetic and phenotypic constraints tend to evolve at high rates typically observed for secondary sexual characters. Here, we examined the...
journal_title:Journal of evolutionary biology
pub_type: 杂志文章
doi:10.1111/jeb.12686
更新日期:2015-09-01 00:00:00
abstract::The independent evolution of males and females is typically constrained by shared genetic variance. Despite substantial research, we still know little about the evolution of cross-sex genetic covariance and its standardized measure, the cross-sex genetic correlation (r(MF)). In particular, it is unclear if r(MF) tend ...
journal_title:Journal of evolutionary biology
pub_type: 杂志文章
doi:10.1111/j.1420-9101.2009.01862.x
更新日期:2009-12-01 00:00:00
abstract::I examined the intrinsic postzygotic incompatibilities between two pupfishes, Cyprinodon elegans and Cyprinodon variegatus. Laboratory hybridization experiments revealed evidence of strong postzygotic isolation. Male hybrids have very low fertility, and the survival of backcrosses into C. elegans was substantially red...
journal_title:Journal of evolutionary biology
pub_type: 杂志文章
doi:10.1111/j.1420-9101.2006.01173.x
更新日期:2006-11-01 00:00:00
abstract::Peacocks are a classic example of sexual selection, where females preferentially mate with males who have longer, more elaborate trains. One of the central hypotheses of sexual selection theory is that large or elaborate male 'ornaments' may signal high genetic quality (good genes). Good genes are thought to be those ...
journal_title:Journal of evolutionary biology
pub_type: 杂志文章
doi:10.1111/j.1420-9101.2009.01746.x
更新日期:2009-06-01 00:00:00
abstract::Understanding the driving forces and molecular processes underlying dioecy and sex chromosome evolution, leading from hermaphroditism to the occurrence of male and female individuals, is of considerable interest in fundamental and applied research. The genus Phoenix, belonging to the Arecaceae family, consists uniquel...
journal_title:Journal of evolutionary biology
pub_type: 杂志文章
doi:10.1111/jeb.12887
更新日期:2016-08-01 00:00:00
abstract::A species' range can be limited when there is no genetic variation for a trait that allows for adaptation to more extreme environments. We study how range expansion occurs by the establishment of a new mutation that affects a quantitative trait in a spatially continuous population. The optimal phenotype for the trait ...
journal_title:Journal of evolutionary biology
pub_type: 杂志文章
doi:10.1111/j.1420-9101.2010.02195.x
更新日期:2011-03-01 00:00:00
abstract::Seminal fluid proteins (SFPs) can trigger drastic changes in mating partners, mediating post-mating sexual selection and associated sexual conflict. Also, cross-species comparisons have demonstrated that SFPs evolve rapidly and hint that post-mating sexual selection drives their rapid evolution. In principle, this pat...
journal_title:Journal of evolutionary biology
pub_type: 杂志文章
doi:10.1111/jeb.13683
更新日期:2020-10-01 00:00:00
abstract::Ecologically important traits of insects are often affected by facultative bacterial endosymbionts. This is best studied in the pea aphid Acyrthosiphon pisum, which is frequently infected by one or more of eight facultative symbiont species. Many of these symbiont species have been shown to provide one ecological bene...
journal_title:Journal of evolutionary biology
pub_type: 杂志文章
doi:10.1111/jeb.12705
更新日期:2015-10-01 00:00:00
abstract::Decoupling between floral and leaf traits is expected in plants with specialized pollination systems to assure a precise flower-pollinator fit, irrespective of leaf variation associated with environmental heterogeneity (functional modularity). Nonetheless, developmental interactions among floral traits also decouple f...
journal_title:Journal of evolutionary biology
pub_type: 杂志文章
doi:10.1111/jeb.12802
更新日期:2016-03-01 00:00:00
abstract::Understanding the functions of animal coloration has been a long-standing question in evolutionary biology. For example, the widespread occurrence of striking longitudinal stripes and colourful tails in lizards begs for an explanation. Experiments have suggested that colourful tails can deflect attacks towards the tai...
journal_title:Journal of evolutionary biology
pub_type: 杂志文章
doi:10.1111/jeb.13364
更新日期:2018-11-01 00:00:00
abstract::Many animals display complex colour patterns that comprise several adjacent, often contrasting colour patches. Combining patches of complementary colours increases the overall conspicuousness of the complex pattern, enhancing signal detection. Therefore, selection for conspicuousness may act not only on the design of ...
journal_title:Journal of evolutionary biology
pub_type: 杂志文章
doi:10.1111/jeb.12835
更新日期:2016-05-01 00:00:00
abstract::Some female pollinating fig wasps (foundresses) re-emerge from figs after oviposition/pollination. We investigated why this occurs in the mutualism between the gynodioecious Ficus montana and Liporrhopalum tentacularis. Re-emergence increased with foundress density in figs and some foundresses oviposited in two male f...
journal_title:Journal of evolutionary biology
pub_type: 杂志文章
doi:10.1046/j.1420-9101.2003.00623.x
更新日期:2003-11-01 00:00:00
abstract::Vertebrates commonly use carotenoid-based traits as social signals. These can reliably advertise current nutritional status and health because carotenoids must be acquired through the diet and their allocation to ornaments is traded-off against other self-maintenance needs. We propose that the coloration more generall...
journal_title:Journal of evolutionary biology
pub_type: 杂志文章
doi:10.1111/j.1420-9101.2009.01926.x
更新日期:2010-03-01 00:00:00
abstract::Evolutionary theories of ageing predict that life span increases with decreasing extrinsic mortality, and life span variation among queens in ant species seems to corroborate this prediction: queens, which are the only reproductive in a colony, live much longer than queens in multi-queen colonies. The latter often inh...
journal_title:Journal of evolutionary biology
pub_type: 杂志文章
doi:10.1111/j.1420-9101.2011.02278.x
更新日期:2011-07-01 00:00:00
abstract::Ecological divergence can cause speciation if adaptive traits have pleiotropic effects on mate choice. In Heliconius butterflies, mimetic patterns play a role in mate detection between sister species, as well as signalling to predators. Here we show that male butterflies from four recently diverged parapatric populati...
journal_title:Journal of evolutionary biology
pub_type: 杂志文章
doi:10.1111/j.1420-9101.2004.00675.x
更新日期:2004-05-01 00:00:00
abstract::We explore the relevance of honest signalling theory to the evolution of aposematism. We begin with a general consideration of models of signal stability, with a focus on the Zahavian costly signalling framework. Next, we review early models of signalling in the context of aposematism (some that are consistent and som...
journal_title:Journal of evolutionary biology
pub_type: 杂志文章,评审
doi:10.1111/jeb.12676
更新日期:2015-09-01 00:00:00
abstract::Local adaptation is commonly observed in nature: organisms perform well in their natal environment, but poorly outside it. Correlations between traits and latitude, or latitudinal clines, are among the most common pieces of evidence for local adaptation, but identifying the traits under selection and the selective age...
journal_title:Journal of evolutionary biology
pub_type: 杂志文章
doi:10.1111/jeb.13184
更新日期:2017-12-01 00:00:00
abstract::Adaptive evolution often involves beneficial mutations at more than one locus. In this case, the trajectory and rate of adaptation is determined by the underlying fitness landscape, that is, the fitness values and mutational connectivity of all genotypes under consideration. Drug resistance, especially resistance to m...
journal_title:Journal of evolutionary biology
pub_type: 杂志文章
doi:10.1111/jeb.12355
更新日期:2014-05-01 00:00:00
abstract::It has been suggested that polyandry allows females to increase offspring genetic diversity and reduce the prevalence and susceptibility of their offspring to infectious diseases. We tested this hypothesis in wild-derived house mice (Mus musculus) by experimentally infecting the offspring from 15 single- and 15 multip...
journal_title:Journal of evolutionary biology
pub_type: 杂志文章
doi:10.1111/jeb.12854
更新日期:2016-06-01 00:00:00
abstract::Phenotypic traits that convey information about individual identity or quality are important in animal social interactions, and the degree to which such traits are influenced by environmental variation can have profound effects on the reliability of these cues. Using inbred genetic lines of the decorated cricket, Gryl...
journal_title:Journal of evolutionary biology
pub_type: 杂志文章
doi:10.1111/j.1420-9101.2012.02593.x
更新日期:2012-10-01 00:00:00
abstract::Because pollinators are unable to directly assess the amount of rewards offered by flowers, they rely on the information provided by advertising floral traits. Thus, having a lower intra-individual correlation between signal and reward (signal accuracy) than other plants in the population provides the opportunity to r...
journal_title:Journal of evolutionary biology
pub_type: 杂志文章
doi:10.1111/j.1420-9101.2010.02132.x
更新日期:2010-12-01 00:00:00