Consequences of prey exoskeleton content for predator feeding and digestion: black widow predation on larval versus adult mealworm beetles

Barnes, Cody; Hawlena, Dror; McCue, Marshall D.; Wilder, Shawn M.

doi:10.1007/s00442-018-4308-y

Cited by 13 publications

(9 citation statements)

References 30 publications

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“…Although elemental and calorimetric analysis remain as common techniques for measuring prey quality (Cumminns and Wuycheck 1971;Fagan et al 2002;Deslauriers et al 2016), applying macronutrient analysis to quantify the nutrient concentration may also provide a more accurate measure of nutrient availability. Many predators are unable to digest significant amounts of chitin, which is particularly relevant for consumers of arthropods, which contain a largely indigestible, chitinous exoskeleton (Barnes et al 2019). Therefore, a measurement of metabolizable nutrients available to predators, such as from macronutrient analysis, may be more suitable.…”

Section: Discussionmentioning

confidence: 99%

“…This is in contrast to a 58:1 ratio that would result in equivalent energy intake based on our study. Although there should be an increase energetic expenditure for digesting protein and chitin (McCue 2006;Secor 2009;Barnes et al 2019), we don't know the digestive passage rate of YOY sturgeon or the physiological expense when digesting Ephemeroptera or Diptera. However, many previous studies measured the consumption of chironomids and other macroinvertebrates by presence of their head capsules in the digestive tract (Gosch et al 2014;Civiello et al 2018).…”

Section: Discussionmentioning

confidence: 99%

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Differences in macronutrient content of common aquatic macroinvertebrates available as prey for young-of-the-yearScaphirhynchussturgeons in the lower Missouri River

González

Barnes

Wilder

et al. 2020

Journal of Freshwater Ecology

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Nutrient availability in prey items can have important consequences for the growth, reproduction, survival, and recruitment into adulthood of juvenile fish. For young of the year sturgeon, which are highly dependent on macroinvertebrates as prey, knowing the nutritional content across various prey items within their habitats can help managers during habitat restoration. The objective of this study was to test for differences in the macronutrient composition of major invertebrate groups commonly consumed by young of the year sturgeon in the lower Missouri River in the summer, when sturgeon habitat assessments occur. Potential prey vary considerably in size. In addition, there were significant differences in the concentrations of nutrients. The lowest concentration of lipid was found in Odonata (2.36 ± 1.83 mg 100 mg À1 ; mean-± pooled variance standard error) and the highest was in Diptera (14.49 ± 3.30 mg 100 mg À1). The lowest concentration of protein was found in Ephemeroptera (58.98 ± 1.90 mg 100 mg À1) and the highest concentration was in Trichoptera (70.07 ± 3.26 mg 100 mg À1). Some spatial differences were found in energy derived from protein in Ephemeroptera in the lower Missouri River, but not in energy derived from lipid. Our findings provide useful information that can contribute to adaptive management efforts for sturgeons in the lower Missouri River.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Differences in macronutrient content of common aquatic macroinvertebrates available as prey for young-of-the-yearScaphirhynchussturgeons in the lower Missouri River

González

Barnes

Wilder

et al. 2020

Journal of Freshwater Ecology

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“…Only a few studies to date have considered the ecological stoichiometry and elemental nutrition of spiders (e.g., [32,35,[40][41][42]); therefore, a large gap in data exists, and it is hard to perform comparisons leading to strong and meaningful conclusions. Hence, we will supplement our reasoning with available data collected for other arthropods.…”

Section: Discussionmentioning

confidence: 99%

Sexual Dimorphism in the Multielemental Stoichiometric Phenotypes and Stoichiometric Niches of Spiders

Sobczyk

Filipiak

Czarnołęski

2020

Insects

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Nutritional limitations may shape populations and communities of organisms. This phenomenon is often studied by treating populations and communities as pools of homogenous individuals with average nutritional optima and experiencing average constraints and trade-offs that influence their fitness in a standardized way. However, populations and communities consist of individuals belonging to different sexes, each with specific nutritional demands and limitations. Taking this into account, we used the ecological stoichiometry framework to study sexual differences in the stoichiometric phenotypes, reflecting stoichiometric niches, of four spider taxa differing in the hunting mode. The species and sexes differed fundamentally in their elemental phenotypes, including elements beyond those most commonly studied (C, N and P). Both species and sexes were distinguished by the C:N ratio and concentrations of Cu, K and Zn. Species additionally differed in concentrations of Na, Mg and Mn. Phosphorous was not involved in this differentiation. Sexual dimorphism in spiders’ elemental phenotypes, related to differences in their stoichiometric niches, suggests different nutritional optima and differences in nutritional limitation experienced by different sexes and species. This may influence the structure and functioning of spider populations and communities.

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“…Therefore, it is essential to consider multielemental ratios in studies dealing with ecological stoichiometry. Only a few studies to date have considered the ecological stoichiometry and elemental nutrition of spiders (e.g., [32,35,[40][41][42]); therefore, a large gap in data exists, and it is hard to perform comparisons leading to strong and meaningful conclusions. Hence, we will supplement our reasoning with available data collected for other arthropods.…”

Section: Discussionmentioning

confidence: 99%

Sexual Dimorphism in the Multielemental Stoichiometric Phenotypes and Stoichiometric Niches of Spiders

Sobczyk¹,

Filipiak²,

Czarnołęski³

2020

Preprint

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Nutritional limitations may shape populations and communities of organisms. This phenomenon is often studied by treating populations and communities as pools of homogenous individuals with average nutritional optima and experiencing average constraints and trade-offs that influence their fitness in a standardized way. However, populations and communities consist of individuals belonging to different sexes, each with specific nutritional demands and limitations. Taking this into account, we used the ecological stoichiometry framework to study sexual differences in the stoichiometric phenotypes, reflecting stoichiometric niches, of four spider taxa differing in hunting mode. The species and sexes differed fundamentally in their elemental phenotypes, including elements beyond those most commonly studied (C, N and P). Both species and sexes were distinguished by the C:N ratio and concentrations of Cu, K and Zn. Species additionally differed in concentrations of Na, Mg and Mn. Phosphorous was not involved in this differentiation. Sexual dimorphism in spiders’ elemental phenotypes, related to differences in their stoichiometric niches, suggests different nutritional optima and differences in nutritional limitation experienced by different sexes and species. This may influence the structure and functioning of spider populations and communities.

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Consequences of prey exoskeleton content for predator feeding and digestion: black widow predation on larval versus adult mealworm beetles

Cited by 13 publications

References 30 publications

Differences in macronutrient content of common aquatic macroinvertebrates available as prey for young-of-the-yearScaphirhynchussturgeons in the lower Missouri River

Differences in macronutrient content of common aquatic macroinvertebrates available as prey for young-of-the-yearScaphirhynchussturgeons in the lower Missouri River

Sexual Dimorphism in the Multielemental Stoichiometric Phenotypes and Stoichiometric Niches of Spiders

Sexual Dimorphism in the Multielemental Stoichiometric Phenotypes and Stoichiometric Niches of Spiders

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