How Mate Availability Influences Filial Cannibalism

Deal, Nicholas D. S.; Wong, Bob B. M.

doi:10.1086/685303

Cited by 10 publications

(13 citation statements)

References 122 publications

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“…Other animals, particularly fishes, practice similar acts of brood cannibalism, typically in a phenotypically plastic manner (Polis, ; Deal & Wong, ). For example, male common gobies mouth‐brood and preferentially consume clutches that are small (Vallon & Heubel, ), young (Vallon & Heubel, ), or infected by water mould (Vallon, Anthes & Heubel, ), whereas male lizard gobies ( Rhinogobius flumineus ) nest‐brood and are more likely to cannibalise clutches if other mates are available (Myint et al, ), particularly gravid females (Takeyama, Namizaki & Kohda, ).…”

Section: Postcopulatory Sexual Selection Acting On Femalesmentioning

confidence: 99%

Sexual selection and its evolutionary consequences in female animals

2018

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For sexual selection to act on a given sex, there must exist variation in the reproductive success of that sex as a result of differential access to mates or fertilisations. The mechanisms and consequences of sexual selection acting on male animals are well documented, but research on sexual selection acting on females has only recently received attention. Controversy still exists over whether sexual selection acts on females in the traditional sense, and over whether to modify the existing definition of sexual selection (to include resource competition) or to invoke alternative mechanisms (usually social selection) to explain selection acting on females in connection with reproduction. However, substantial evidence exists of females bearing characters or exhibiting behaviours that result in differential reproductive success that are analogous to those attributed to sexual selection in males. Here we summarise the literature and provide substantial evidence of female intrasexual competition for access to mates, female intersexual signalling to potential mates, and postcopulatory mechanisms such as competition between eggs for access to sperm and cryptic male allocation. Our review makes clear that sexual selection acts on females and males in similar ways but sometimes to differing extents: the ceiling for the elaboration of costly traits may be lower in females than in males. We predict that current and future research on female sexual selection will provide increasing support for the parsimony and utility of the existing definition of sexual selection.

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Section: Postcopulatory Sexual Selection Acting On Femalesmentioning

confidence: 99%

Sexual selection and its evolutionary consequences in female animals

2018

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“…With hierarchical group living and offspring care, N. pulcher provides an ideal model to investigate this phenomenon. Furthermore, though egg cannibalism is widespread among fishes [29][30][31], it has not been well studied in N. pulcher, and never in the context of group takeovers. Group takeovers were associated with high levels of egg cannibalism.…”

Section: Discussionmentioning

confidence: 99%

A test of male infanticide as a reproductive tactic in a cichlid fish

Jindal¹,

Bose²,

O’Connor³

et al. 2017

R. Soc. open sci.

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Infanticide and offspring cannibalism are taxonomically widespread phenomena. In some group-living species, a new dominant individual taking over a group can benefit from infanticide if doing so induces potential mates to become reproductively available sooner. Despite widespread observations of infanticide (i.e. egg cannibalism) among fishes, no study has investigated whether egg cannibalism occurs in fishes as a result of group takeovers, or how this type of cannibalism might be adaptive. Using the cooperatively breeding cichlid, Neolamprologus pulcher, we tested whether new unrelated males entering the dominant position in a social group were more likely to cannibalize eggs, and whether such cannibalism would shorten the interval until the female's next spawning. Females spawned again sooner if their broods were removed than if they were cared for. Egg cannibalism occurred frequently after a group takeover event, and was rarer if the original male remained with the group. While dominant breeder females were initially highly aggressive towards newcomer males that took over the group, the degree of resistance depended on relative body size differences between the new pair and, ultimately, female aggression did not prevent egg cannibalism. Egg cannibalism, however, did not shorten the duration until subsequent spawning, or increase fecundity during subsequent breeding in our laboratory setting. Our results show that infanticide as mediated through group takeovers is a taxonomically widespread behaviour.

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“…Within an animal species, individuals also fight against each other to live better and longer, with cannibalism as an extreme phenomenon of this fight and filial cannibalism as an even more extreme example 110 - 113 . Similarly, within individual organs or tissues of an animal, individual cells fight against their fellow cells to live better or longer, which is commonly coined as “cell competition” 114 - 118 .…”

Section: Individuals At Different Levels Of Life Are Also Egocentricmentioning

confidence: 99%

Evaluating the Remote Control of Programmed Cell Death, with or without a Compensatory Cell Proliferation

et al. 2018

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Organisms and their different component levels, whether organelle, cellular or other, come by birth and go by death, and the deaths are often balanced by new births. Evolution on the one hand has built demise program(s) in cells of organisms but on the other hand has established external controls on the program(s). For instance, evolution has established death program(s) in animal cells so that the cells can, when it is needed, commit apoptosis or senescent death (SD) in physiological situations and stress-induced cell death (SICD) in pathological situations. However, these programmed cell deaths are not predominantly regulated by the cells that do the dying but, instead, are controlled externally and remotely by the cells' superior(s), i.e. their host tissue or organ or even the animal's body. Currently, it is still unclear whether a cell has only one death program or has several programs respectively controlling SD, apoptosis and SICD. In animals, apoptosis exterminates, in a physiological manner, healthy but no-longer needed cells to avoid cell redundancy, whereas suicidal SD and SICD, like homicidal necrosis, terminate ill but useful cells, which may be followed by regeneration of the live cells and by scar formation to heal the damaged organ or tissue. Therefore, “who dies” clearly differentiates apoptosis from SD, SICD and necrosis. In animals, apoptosis can occur only in those cell types that retain a lifelong ability of proliferation and never occurs in those cell types that can no longer replicate in adulthood. In cancer cells, SICD is strengthened, apoptosis is dramatically weakened while SD has been lost. Most published studies professed to be about apoptosis are actually about SICD, which has four basic and well-articulated pathways involving caspases or involving pathological alterations in the mitochondria, endoplasmic reticula, or lysosomes.

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How Mate Availability Influences Filial Cannibalism

Cited by 10 publications

References 122 publications

Sexual selection and its evolutionary consequences in female animals

Sexual selection and its evolutionary consequences in female animals

A test of male infanticide as a reproductive tactic in a cichlid fish

Evaluating the Remote Control of Programmed Cell Death, with or without a Compensatory Cell Proliferation

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