No sexual cannibalism for these octopuses

2021 ◽  
Keyword(s):  
Sexual Cannibalism

scholarly journals Males Can Benefit from Sexual Cannibalism Facilitated by Self-Sacrifice

2016 ◽  
Vol 26 (20) ◽  
pp. 2794-2799 ◽  
Author(s):  
Steven K. Schwartz ◽  
William E. Wagner ◽  
Eileen A. Hebets
Keyword(s):  
Sexual Cannibalism

Mate quality, not aggressive spillover, explains sexual cannibalism in a size-dimorphic spider

2011 ◽  
Vol 66 (1) ◽  
pp. 145-151 ◽  
Author(s):  
Simona Kralj-Fišer ◽  
Jutta M. Schneider ◽  
Živa Justinek ◽  
Sabina Kalin ◽  
Matjaž Gregorič ◽  
...  
Keyword(s):  
Sexual Cannibalism ◽  
Mate Quality

scholarly journals The shield effect: nuptial gifts protect males against pre-copulatory sexual cannibalism

2016 ◽  
Vol 12 (5) ◽  
pp. 20151082 ◽  
Author(s):  
Søren Toft ◽  
Maria J. Albo
Keyword(s):  
Indirect Evidence ◽  
Experimental Tests ◽  
Female Aggression ◽  
Sexual Cannibalism ◽  
Nuptial Gift ◽  
Nuptial Gifts ◽  
Spider Species ◽  
Pisaura Mirabilis

Several not mutually exclusive functions have been ascribed to nuptial gifts across different taxa. Although the idea that a nuptial prey gift may protect the male from pre-copulatory sexual cannibalism is attractive, it has previously been considered of no importance based on indirect evidence and rejected by experimental tests. We reinvestigated whether nuptial gifts may function as a shield against female attacks during mating encounters in the spider Pisaura mirabilis and whether female hunger influences the likelihood of cannibalistic attacks. The results showed that pre-copulatory sexual cannibalism was enhanced when males courted without a gift and this was independent of female hunger. We propose that the nuptial gift trait has evolved partly as a counteradaptation to female aggression in this spider species.

Precopulatory sexual cannibalism in fishing spiders (Dolomedes triton): a role for behavioral syndromes

2005 ◽  
Vol 58 (4) ◽  
pp. 390-396 ◽  
Author(s):  
J. Chadwick Johnson ◽  
Andrew Sih
Keyword(s):  
Behavioral Syndromes ◽  
Sexual Cannibalism ◽  
Dolomedes Triton ◽  
Fishing Spiders

Effects of male and female personality on sexual cannibalism in the Springbok mantis

2021 ◽  
Author(s):  
Pietro Pollo ◽  
Nathan W Burke ◽  
Gregory I Holwell
Keyword(s):  
Personality Traits ◽  
Developmental Stages ◽  
Male Mating ◽  
Sexual Cannibalism ◽  
Activity Levels ◽  
Male And Female ◽  
Young Females ◽  
Behavioural Syndromes ◽  
Male Activity ◽  
Spillover Hypothesis

Behaviours that are consistent across contexts (also known as behavioural syndromes) can have evolutionary implications, but their role in scenarios where the sexes conflict, such as sexual cannibalism, is poorly understood. The aggressive spillover hypothesis proposes that cannibalistic attacks during adulthood may depend on female aggressiveness during earlier developmental stages, but evidence for this hypothesis is scarce. Male activity may also influence sexual cannibalism if males approach females quickly and carelessly, yet this has not been explored. Here we use the Springbok mantis, Miomantis caffra, to explore whether male activity levels and female aggressiveness can explain high rates of sexual cannibalism prior to copulation. We show that male and female personality traits affect male mating decisions, but not sexual cannibalism. Females that were aggressive as juveniles were not more likely to cannibalize males when adult, but these females were approached by males more frequently. More active males were more likely to approach females, but they were neither faster at doing so nor were they more likely to be cannibalized. We also found that size and age influenced mating decisions of both sexes: young females were more like to cannibalize males while young and large males took longer to approach females. Taken together, our results suggest that several traits, including personality, play a role in sexual encounters in M. caffra. Our study further highlights the importance of examining the traits of both sexes when assessing mating dynamics, especially in the context of sexual cannibalism.

Age Affects the Risk of Sexual Cannibalism in Male Crab Spiders (Misumena vatia)

2004 ◽  
Vol 151 (2) ◽  
pp. 318-325 ◽  
Author(s):  
DOUGLASS H. MORSE ◽  
HELEN H. HU
Keyword(s):  
Sexual Cannibalism ◽  
Male Crab ◽  
Misumena Vatia ◽  
Crab Spiders

Sexual dimorphism in leg length among orb-weaving spiders: a possible role for sexual cannibalism

1990 ◽  
Vol 222 (3) ◽  
pp. 455-470 ◽  
Author(s):  
M. A. Elgar ◽  
N. Ghaffar ◽  
A. F. Read
Keyword(s):  
Sexual Dimorphism ◽  
Sexual Cannibalism ◽  
Leg Length
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