Females increase egg deposition in favor of large males in the rainbowfish, Melanotaenia australis

Evans, Jonathan P.; Box, Tegan M.; Brooshooft, Penny; Tatler, Jack; Fitzpatrick, John L.

doi:10.1093/beheco/arq006

Cited by 20 publications

(25 citation statements)

References 32 publications

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“…As opposed to reproductive effort, clutch size is relatively easily defined, and relatively easily quantified if done so just before reproduction. Plasticity for clutch size has been documented in a wide array of poikilotherms (Roff et al, 1999: Klemetsen et al, 2003, including numerous fish (Kennedy et al, 2008;Evans et al, 2010). Little clutch-to-clutch size fluctuation is reported in ectotherms, but there is evidence for long-term plasticity cued by energy acquisition during the prespawning period when the gonads are developing.…”

Section: Clutch Sizementioning

confidence: 99%

Life-history plasticity in female threespine stickleback

et al. 2015

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The postglacial adaptive radiation of the threespine stickleback fish (Gasterosteus aculeatus) has been widely used to investigate the roles of both adaptive evolution and plasticity in behavioral and morphological divergence from the ancestral condition represented by present-day oceanic stickleback. These phenotypes tend to exhibit high levels of ecotypic differentiation. Population divergence in life history has also been well studied, but in contrast to behavior and morphology, the extent and importance of plasticity has been much less well studied. In this review, we summarize what is known about life-history plasticity in female threespine stickleback, considering four traits intimately associated with reproductive output: age/size at maturation, level of reproductive effort, egg size and clutch size. We envision life-history plasticity in an iterative, ontogenetic framework, in which females may express plasticity repeatedly across each of several time frames. We contrast the results of laboratory and field studies because, for most traits, these approaches give somewhat different answers. We provide ideas on what the cues might be for observed plasticity in each trait and, when possible, we inquire about the relative costs and benefits to expressed plasticity. We end with an example of how we think plasticity may play out in stickleback life history given what we know of plasticity in the ancestor.

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Section: Clutch Sizementioning

confidence: 99%

Life-history plasticity in female threespine stickleback

et al. 2015

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“…However, rainbow fish ( Melanotaenia australis ) males are not known to provide any obvious material resources to females but it has been shown that females spawn more eggs to large males compared to small males [20]. Similarly, zebrafish ( Danio rerio ) is a batch spawning fish with no parental care [21], and although the species lacks clear secondary sexual characteristics, zebrafish females have been shown to discriminate particular male traits during spawning [22], [23].…”

Section: Introductionmentioning

confidence: 99%

Differential Allocation by Female Zebrafish (Danio rerio) to Different-Sized Males – An Example in a Fish Species Lacking Parental Care

et al. 2012

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Organisms allocate resources to reproduction in response to the costs and benefits of current and future reproductive opportunities. According to the differential allocation hypothesis, females allocate more resources to high-quality males. We tested whether a fish species lacking parental care (zebrafish, Danio rerio) expresses male size-dependent differential allocation in monogamous spawning trials. In addition, we tested whether reproductive allocation by females is affected by previous experience of different-quality males, potentially indicating plasticity in mate choice. To that end, females were conditioned to large, small or random-sized males (controls) for 14 days to manipulate females' expectations of the future mate quality. Females showed a clear preference for large males in terms of spawning probability and clutch size independent of the conditioning treatment. However, when females experienced variation in male size (random-sized conditioning treatment) they discriminated less against small males compared to females conditioned to large and small males. This might suggest that differential allocation and size-dependent sexual selection is of less relevance in nature than revealed in the present laboratory study.

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“…Other studies that have supported the differential allocation hypothesis could not fully exclude selection operating through direct benefits (Gil et al 1999, Cunningham & Russell 2000, Kolm 2001). There are indications in other species that differential allocation is positively genetically linked to male quality (Head et al 2006, Harris & Uller 2009) and/or attractiveness (Gilbert et al 2006, Bonato et al 2009, Evans et al 2010, which would provide an adaptive explanation for the resulting within-clutch variation in oocyte size. An alternative possibility, involving sexual conflict, is that sperm differs, according to its source, in its ability to manipulate the recipient colony to increase maternal investment.…”

Section: Discussionmentioning

confidence: 99%

Differential maternal allocation following mixed insemination contributes to variation in oocyte size in a sea squirt

Hammerschmidt

Pemberton²,

Michiels³

et al. 2011

Mar. Ecol. Prog. Ser.

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In many organisms, offspring fitness is markedly affected by size at hatching. Theoretical models predict offspring from one clutch to have the same optimal size, but empirical studies report within-clutch variation in offspring sizes for a wide range of species. According to the differential allocation hypothesis, this could be explained, at least in part, by multiply mated females selectively provisioning their offspring depending on the sperm donor. We tested this hypothesis in the internally fertilising, colonial sea squirt Diplosoma listerianum, whose larvae are non-feeding so that females' provisioning of oocytes provides all of the energy for larval dispersal and metamorphosis. We show that there is high within-clutch variation in offspring size in a natural D. listerianum population. When we then crossed laboratory clones pairwise in a fully factorial design in the laboratory, we found that the same acting female clone produced differently sized oocytes with different mating partners. This result does not reflect the effect of direct male benefits, as the water-borne sperm cell is the only contact between males and females, but nevertheless indicates that females allocate resources to their offspring in part influenced by the father's identity. This pattern would be expected to contribute to within-clutch variation in offspring size in mixed-paternity broods. KEY WORDS: Differential allocation · Oocyte size · Offspring fitness · Maternal investment · Diplosoma listerianumResale or republication not permitted without written consent of the publisher

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Females increase egg deposition in favor of large males in the rainbowfish, Melanotaenia australis

Cited by 20 publications

References 32 publications

Life-history plasticity in female threespine stickleback

Life-history plasticity in female threespine stickleback

Differential Allocation by Female Zebrafish (Danio rerio) to Different-Sized Males – An Example in a Fish Species Lacking Parental Care

Differential maternal allocation following mixed insemination contributes to variation in oocyte size in a sea squirt

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