Filial cannibalism in an assassin bug

Thomas, Lisa; Manica, Andrea

doi:10.1006/anbe.2003.2202

Cited by 57 publications

(51 citation statements)

References 25 publications

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“…While the former describes the eating of unrelated conspecifics, the latter describes the consumption of own offspring, either eggs or young. The occurrence of filial cannibalism has been shown not only in many fish species (see Manica 2002;Klug & Bonsall 2007 for review), but also in mammals (Elwood 1991), reptiles (Huang 2008), birds (Gilbert et al 2005), crustaceans (Dumont & Ali 2004) and insects (Thomas & Manica 2003). Filial cannibalism is often associated with parental care (Manica 2002).…”

Section: Introductionmentioning

confidence: 99%

To eat or not to eat: egg-based assessment of paternity triggers fine-tuned decisions about filial cannibalism

et al. 2010

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Filial cannibalism occurs in many animal species ranging from insects to mammals, and is especially well described in teleost fishes. Numerous causes may lead to this behaviour, e.g. certainty of paternity. However, the cues males use to assess their paternity often remain unknown. One possible way to differentiate between own and foreign offspring is by using egg cues. Nevertheless, in egg-laying species, evidence for this is still scarce. In this study, male three-spined sticklebacks (Gasterosteus aculeatus), a fish with paternal care in which sneaking as well as filial cannibalism is common, were allowed to care for manipulated nests that contained different percentages of own fertilized eggs. After 7 days, embryo survival was determined. Furthermore, brood-caring as well as aggressive behaviour was measured daily. Clutches containing a higher proportion of foreign eggs were more likely to be completely cannibalized than clutches containing a lower proportion of foreign eggs, particularly when the clutch was laid early in the breeding season. However, the behavioural observations revealed no influence of paternity. The results show that paternity triggers filial cannibalism in sticklebacks and that males are able to evaluate their paternity using egg cues alone.

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Section: Introductionmentioning

confidence: 99%

To eat or not to eat: egg-based assessment of paternity triggers fine-tuned decisions about filial cannibalism

et al. 2010

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“…If so, females should prefer to spawn in a nest with fewer eggs, since the likelihood of other females adding more eggs later should decrease as the nest becomes full. In addition, in species in which last eggs are laid along the periphery, it is also possible that this position is unfavourable for the eggs (Thomas and Manica 2003;Green et al 2006;Kudo 2006).…”

Section: Introductionmentioning

confidence: 95%

Filial cannibalism in a nest-guarding fish: females prefer to spawn in nests with few eggs over many

Andrén

Kvarnemo

2014

Behav Ecol Sociobiol

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In fish, fecundity correlates with female body size and egg-tending males often eat small broods. Therefore, small females may prefer to spawn in nests that already contain many eggs, to ensure the brood is as large as possible.In contrast, large females may prefer nests with few eggs, if high egg number or density has a negative effect on egg survival, or if there are drawbacks of spawning last in a nest. To test the hypothesis that female body size affects nest (and male mate) choice, using the sand goby (Pomatoschistus minutus), we allowed small and large females to choose between two males that were matched in size -one guarding a small clutch and the other a large clutch, respectively. We recorded where females spawned (measure of female preference), the combined brood size, male courtship, egg care and nest building. We also quantified the effect of brood size and egg density on egg survival in a separate data set. Although the combined broods did not exceed the small brood sizes that are at risk of being eaten, both small and large females preferred to spawn in nests with smaller clutch sizes. This preference could not be explained by more courtship or male parental effort, nor by reduced survival of larger or denser broods. Instead, our result might be explained by females avoiding the danger of cannibalism of young eggs by males or the risk of reduced egg health associated with being near the nest periphery.

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“…De fato, tanto na condição de alta quanto na de baixa disponibilidade de ninhos, machos guardiões consumiram ovos de suas desovas em frequência e quantidade similares. Diante da supressão quase total do forrageio, o canibalismo filial pode minimizar os custos energéticos do cuidado paternal sem o risco de perder a posse do sítio de nidificação e dos ovos nele contidos (Manica, 2002(Manica, , 2004 (Thomas & Manica, 2003). Apesar de não haver um ninho, machos rivais estão constantemente tentando usurpar desovas, pois isso aumenta muito a atratividade dos machos (Gilbert et al, 2010).…”

Section: Discussionunclassified

“…Uma forma de compensar esses custos do cuidado sem abandonar a prole é o canibalismo filial, definido como o consumo da própria prole pelo indivíduo parental (FitzGerald, 1992). De fato, o canibalismo filial é bastante comum quando há cuidado paternal e é mais provável ocorrer quando o consumo da prole pode aumentar a qualidade do cuidado (Manica, 2002(Manica, , 2004Thomas & Manica, 2003;Klug & Bonsall, 2007).…”

Section: Introductionunclassified

Efeito da disponibilidade de sítios de nidificação sobre o sistema de acasalamento e o cuidado paternal em um opilião neotropical (Arachnida: Opiliones)

Werneck¹

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Filial cannibalism in an assassin bug

Cited by 57 publications

References 25 publications

To eat or not to eat: egg-based assessment of paternity triggers fine-tuned decisions about filial cannibalism

To eat or not to eat: egg-based assessment of paternity triggers fine-tuned decisions about filial cannibalism

Filial cannibalism in a nest-guarding fish: females prefer to spawn in nests with few eggs over many

Efeito da disponibilidade de sítios de nidificação sobre o sistema de acasalamento e o cuidado paternal em um opilião neotropical (Arachnida: Opiliones)

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