Effect of diet and rearing density on contest outcome and settlement in a field cricket

Kelly, Clint D.; L’Heureux, Valérie

doi:10.1007/s00265-021-02990-w

Cited by 3 publications

(3 citation statements)

References 60 publications

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“…To test this, we used the tropical house cricket ( Gryllodes sigillatus ) as a model species. Cricket species have been used extensively as a model in previous studies to analyze dietary effects on growth and allometry (e.g., Bertram et al, 2021 ; Kelley and L’Heureux, 2021 ; Haley and Gray, 2012 ). The effects of MP ingestion on growth may affect certain organs, such that changes in organ growth are more pronounced than changes in total body size ( Whitman, 2008 ).…”

Section: Introductionmentioning

confidence: 99%

Ingestion of Microplastic Fibres, But Not Microplastic Beads, Impacts Growth Rates in the Tropical House Cricket Gryllodes Sigillatus

et al. 2022

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Microplastic is a growing concern as an environmental contaminant as it is ubiquitous in our ecosystems. Microplastics are present in terrestrial environments, yet the majority of studies have focused on the adverse effects of microplastics on aquatic biota. We hypothesized that microplastic ingestion by a terrestrial insect would have localized effects on gut health and nutrient absorption, such that prolonged dietary microplastic exposure would impact growth rate and adult body size. We further hypothesized that plastic form (fibres vs. beads) would influence these effects because of the nature of gut-plastic interactions. Freshly hatched tropical house crickets (Gryllodes sigillatus) were fed a standard diet containing different concentrations of either fluorescent polyethylene microplastic beads (75–105 μm), or untreated polyethylene terephthalate microfibers (< 5 mm) until they died or reached adulthood (approximately 8 weeks). Weight and body length were measured weekly and microplastic ingestion was confirmed through fluorescence microscopy and visual inspection of the frass. While, to our surprise, we found no effect of polyethylene bead ingestion on growth rate or final body size of G. sigillatus, females experienced a reduction in size and weight when fed high concentrations of polyethylene terephthalate microfibers. These results suggest that high concentrations of polyethylene beads of the 100 μm size range can pass through the cricket gut without a substantial negative effect on their growth and development time, but high concentrations of polyethylene terephthalate microfibers cannot. Although we report the negative effects of microplastic ingestion on the growth of G. sigillatus, it remains uncertain what threats microplastics pose to terrestrial insects.

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Section: Introductionmentioning

confidence: 99%

Ingestion of Microplastic Fibres, But Not Microplastic Beads, Impacts Growth Rates in the Tropical House Cricket Gryllodes Sigillatus

et al. 2022

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“…Fixed ARTs are typically under negative frequency dependent dynamics [30][31][32], meaning that they are more successful when rare in a population. Good evidence in support of negative frequency dependent dynamics is found in male blue gill sunfish (Lepomis macrochirus) where the fitness payoff of sneaking morphs decreases as they became more common [33].…”

Section: Introductionmentioning

confidence: 99%

“…Sneaky morphotypes can be fixed from birth by genes [13,23–25], such as small and large morphs of the pygmy sword tail fish Xiphophorus nigrensis [26], from parental effects such as in spider mites Tetranychus urticae [18], or by the developmental environment [27–29] such as the effect of temperature on growth and ART expression in the male squid Uroteuthis edulis [19]. Fixed ARTs are typically under negative frequency dependent dynamics[30–32], meaning that they are more successful when rare in a population. Good evidence in support of negative frequency dependent dynamics is found in male blue gill sunfish ( Lepomis macrochirus ) where the fitness payoff of sneaking morphs decreases as they became more common [33].…”

Section: Introductionmentioning

confidence: 99%

Strategic use of male alternative reproductive tactics in cooperatively breeding banded mongoose groups

Birch,

Nichols,

Mwanguhya

et al. 2024

Preprint

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Alternative reproductive tactics (ARTs) allow smaller or less competitive individuals to reproduce by avoiding direct fights through sneaky strategies. Within cooperatively breeding groups ARTs are rarely reported, potentially due to difficulties observing male reproductive behaviour in the wild, or reproductive suppression by fellow group members. In societies where all mating opportunities cannot be monopolised by one male, young males could use sneaky tactics as a stepping-stone to gain limited reproductive success while they grow in resource holding potential (RHP). Using 20 years of pedigree, weight, group demography, and behavioural data, we investigated the use of sneaky pesterer ARTs in wild banded mongooses. Instead of a stepping stone, pestering tactics were typically a rare back-up used by males displaced from mate guarding tactics by higher RHP rivals. Additionally, pesterers have lower siring success compared to mate guards, despite similar weight loss costs, which may explain why most males settle for reproductive inactivity rather than use pestering tactics. However, pestering allows younger males to gain access to older, higher fecundity females in the group and may even facilitate inbreeding avoidance. Overall, ARTs provide a viable option for reproductive fitness for some males that lose out on reproductive positions in highly male-skewed groups.

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Effect of rearing density on the expression of fitness-related traits in male sand field crickets (Gryllus firmus)

et al. 2023

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Effect of diet and rearing density on contest outcome and settlement in a field cricket

Cited by 3 publications

References 60 publications

Ingestion of Microplastic Fibres, But Not Microplastic Beads, Impacts Growth Rates in the Tropical House Cricket Gryllodes Sigillatus

Ingestion of Microplastic Fibres, But Not Microplastic Beads, Impacts Growth Rates in the Tropical House Cricket Gryllodes Sigillatus

Strategic use of male alternative reproductive tactics in cooperatively breeding banded mongoose groups

Effect of rearing density on the expression of fitness-related traits in male sand field crickets (Gryllus firmus)

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