author={Dolores Sch{\"u}tz and Michael Taborsky},
Abstract Argyroneta aquatica is the only spider that spends its entire life under water, and is one of the few spiders in which males are larger than females. In this paper we investigated size dependent mate choice to clarify whether intersexual selection may be partly responsible for the reversed sexual size dimorphism (SSD) in A. aquatica. We found that females that only copulated once could produce up to six viable egg sacs, although the number of offspring decreased with each egg sac… 

Sexual Selection in the Water Spider: Female Choice and Male-Male Competition

It is found that females approach and choose large males as mating partners, despite the risk of male cannibalism, which seems to be important for the evolution of the peculiar sexual size dimorphism of water spiders.

Daring females, devoted males, and reversed sexual size dimorphism in the sand-dwelling spider Allocosa brasiliensis (Araneae, Lycosidae)

Findings on the sand-dwelling wolf spider, Allocosa brasiliensis, prove a reversal in typical courtship roles reported for the first time in spiders, turning it as a promising model for discussing the determinants of sex roles and the pressures that drive their evolution and maintenance.

Male sexual cannibalism in a sand-dwelling wolf spider with sex role reversal

This is the first report of male sexual cannibalism in a sex role reversed system and the astonishing male cannibalistic behaviour best agrees with extreme mate choice hypotheses because attacks were more frequent on mated females of low body condition.

Mate with the young, kill the old: reversed sexual cannibalism and male mate choice in the spider Micaria sociabilis (Araneae: Gnaphosidae)

It is concluded that reversed sexual cannibalism might be an adaptive mate choice mechanism and can be explained in the context of the aggressive spillover hypothesis.

Eat or Not to Eat: Reversed Sexual Cannibalism as a Male Foraging Strategy in the Spider Micaria sociabilis (Araneae: Gnaphosidae)

It is found that male cannibalism is not affected by short-term starvation but rather by male feeding history during the ontogenetic development in combination with prey availability during the adult stage.

Reproductive isolation and sex-role reversal in two sympatric sand-dwelling wolf spiders of the genus Allocosa

Data is compared on development and morphology and reproductive isolation between morphs of A. brasiliensis to test the hypotheses that the two morphs are reproductively isolated and both show courtship-role reversal.

Extreme natural size variation in both sexes of a sexually cannibalistic mantidfly

Using preserved collections of Dicromantispa sayi, this study focused on three body size metrics that were found to be positively correlated and accurately measured across researchers and found extreme size variation in both sexes.

Effect of egg cannibalism on mating preferences and reproductive fitness of Menochilus sexmaculatus Fabricius (Coleoptera: Coccinellidae)

Assessment of the effect of conspecific egg cannibalism on mate preferences and reproductive outputs including offspring development in Menochilus sexmaculatus Fabricius found higher mate preferences were recorded for non-cannibal mates than cannibal ones (fed on Conspecific eggs).

REVIEWS Sexual cannibalism and mate choice

Sexual cannibalism, where a female kills and consumes a courting male, represents an extreme form of sexual conflict and has been proposed as a mechanism of mate choice. We evaluate the evidence for

Ecological preference of the diving bell spider Argyroneta aquatica in a resurgence of the Po plain (Northern Italy) (Araneae: Cybaeidae)

The diving bell spider Argyroneta aquatica is the only known spider to conduct a wholly aquatic life. For this reason, it has been the object of an array of studies concerning different aspects of



Adaptations to an aquatic life may be responsible for the reversed sexual size dimorphism in the water spider, Argyroneta aquatica

The need for males to move efficiently under water and the costs to females of building a retreat and breeding shelter may be important determinants of body size and morphology.

Sexual cannibalism and sperm competition in the golden orb-web spider Nephila plumipes (Araneoidea): female and male perspectives

The adaptive value of cannibalism is investigated in the orb-web spider Nephila plumipes where 60% of males do not survive copulation and the data suggest that the conflict between the sexes differs between virgin and mated females.

Mating system and mating success of the desert spider Agelenopsis aperta

Field studies of the desert spider Agelenopsis aperta revealed a primarily monogamous mating system, however polygyny, polyandry and polygynandry were superimposed upon the primary system, and male weight determined the outcome of male-male agonistic interactions over females.

Sexual conflict in the snake den

Female ”tactics” to escape male harassment may explain other puzzling aspects of garter snake biology including size-assortative mating, temporal patterns in dispersal from the den, avoidance of communal dens by young-of-the-year snakes, and female mimicry.

Sexual cannibalism in fishing spiders (Dolomedes triton): an evaluation of two explanations for female aggression towards potential mates

Mating trials revealed mixed support for the adaptive foraging hypothesis as, for the most part, female mating behaviour was not determined by the adaptive value a male represented (food item or sperm donor).

Female control of paternity in the sexually cannibalistic spider Argiope keyserlingi

It is shown that polyandrous female orb–web spiders Argiope keyserlingi (Araneidae) control the paternity of their offspring by adjusting the timing of sexual cannibalism, and that females copulating with relatively smaller males delay sexual cannibalistan, thereby prolonging the duration of copulation, and these males consequently fertilize relatively more eggs.

The adaptive significance of parental role division and sexual size dimorphism in breeding shorebirds

Sexual size dimorphism among 57 species in the shorebird family Scolopacidae is evaluated in relation to parental role division during breeding in order to attain high parental efficiency for energetic reasons, because smaller individuals need less energy to maintain themselves.

Sexual Cannibalism in Orb-Weaving Spiders: An Economic Model

The model demonstrates that cannibalism of courting males by virgin females can arise purely through foraging considerations and that the most important factors for the evolution of this behavior are the expected number of males encountered during the season and the distribution of mass gained from other prey items.

Sexual cannibalism in Nephila plumipes as a consequence of female life history strategies

It is suggested that sexual cannibalism in N. plumipes is a side‐effect of an increased foraging vigour of females that matured at a smaller size and body mass.

Time Budget of Activity in the Water Spider Argyroneta aquatica (Araneae : Argyronetidae) under Rearing Condition

The water spider Argyroneta aquatica (Argyronetidae) is the only spider that lives under water and seems to complete their life within a year, with juveniles and adult females acting mostly at night, but they spent most of the time in the air dome.