Estimating biomass from body size of European spiders based on regression models

Penell, Anja; Raub, Florian; Höfer, Hubert

doi:10.1636/joa-s-17-044.1

Cited by 25 publications

(12 citation statements)

References 28 publications

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“…Video frame scales were calibrated by using the average spider body length derived from the average 0.9 mg mass, estimated from statistical studies of spider mass versus body length for a large number of spiders of similar type [28]. The implied mean body length for the spiders involved in the launches is ∼2.0 mm, consistent with the measured range of 1.8-2.8 mm of the full group of 38 spiders.…”

Section: A Video Frame Calibrationmentioning

confidence: 73%

Evidence for nanocoulomb charges on spider ballooning silk

Morley

Gorham

2020

Phys. Rev. E

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We report on three launches of ballooning Erigone spiders observed in a 0.9 m 3 laboratory chamber, controlled under conditions where no significant air motion was possible. These launches were elicited by vertical, downward-oriented electric fields within the chamber, and the motions indicate clearly that negative electric charge on the ballooning silk, subject to the Coulomb force, produced the lift observed in each launch. We estimate the total charge required under plausible assumptions, and find that at least 1.15 nC is necessary in each case. The charge is likely to be nonuniformly distributed, favoring initial longitudinal mobility of electrons along the fresh silk during extrusion. These results demonstrate that spiders are able to utilize charge on their silk to attain electrostatic flight even in the absence of any aerodynamic lift.

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Section: A Video Frame Calibrationmentioning

confidence: 73%

Evidence for nanocoulomb charges on spider ballooning silk

Morley

Gorham

2020

Phys. Rev. E

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“…However, knowledge about specific spatial and temporal variations of life history traits remains scarce in invertebrates, especially in cold environments (Homburg et al 2013;Høye and Sikes 2013;Ameline et al 2017). Body size is one of the key features of life history traits research in ectotherms (Angiletta et al 2004;Chown and Gaston 2010;Høye and Hammel 2010), because it is considered a proxy for fecundity, body condition, and survival (e.g., Hodkinson 2005;Bowden, Høye, and Buddle 2013;Penell, Raub, and Höfer 2018). In general, larger individuals show higher fecundity and lower mortality rates (Smith and Fretwell 1974;Fox and Czesak 2000).…”

Section: Introductionmentioning

confidence: 99%

Broad-scale rather than fine-scale environmental variation drives body size in a wandering predator (Araneae, Lycosidae)

Hein

Pétillon

Pape

et al. 2019

Arctic, Antarctic, and Alpine Research

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Body size is one of the most important individual traits, determining various other life-history traits, including fitness. Both evolutionary and ecological factors shape the body size in arthropods, but the relative contribution of abiotic drivers acting at different spatial scales has been little investigated. We aimed to identify the importance of two broad-scale variables (study region and elevation) in shaping body size of the free-running and locally abundant wolf spider Pardosa palustris (LINNAEUS 1758), in contrast to the fine-scaled variable topographic position. Therefore, we set up transects along environmental gradients in the arctic-alpine ecosystems of Norway, which we analyzed using a random forest approach to identify the relative importance of topographic position, elevation, and study region on body size of P. palustris. Our approach revealed that research region was the best explanatory variable, followed by elevation and topographic position. Differences in body size were most likely a consequence of the pronounced differences in season length and the ability of P. palustris to avoid local unfavorable environmental conditions due to its high mobility.

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“…We took a picture of the spider’ back together with a measuring tape for measuring the body size later in the ImageJ software (Schneider et al., 2012). We measured the highest length and largest width of the carapace (prosoma) which are commonly used as proxy for whole body size, fitness, and metabolic rate in spiders (Jakob et al., 1996; Penell et al., 2018).…”

Section: Methodsmentioning

confidence: 99%

Biogeographic position and body size jointly set lower thermal limits of wandering spiders

Monsimet

Colinet

Devineau

et al. 2021

Ecology and Evolution

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The ability of a species to cope with variations in abiotic conditions influences its distribution range (Gaston, 2003). Abiotic factors, and among them temperature, shape the geographic range of ectotherm species, and this is even more relevant in the context of global warming (Addo-Bediako et al., 2000;Somero, 2012). Some ectotherms survive extracellular freezing of their body fluids and are thus freezing tolerant, whereas most ectotherms are freezing intolerant.Instead of having high supercooling abilities (i.e., low supercooling point, SCP), freezing tolerant species, like some alpine species, tend to freeze at relatively high subzero temperatures, a phenomenon that occurs thanks to the synthesis ice nucleators and cryoprotectants that respectively induce and protect against freezing stress

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Estimating biomass from body size of European spiders based on regression models

Cited by 25 publications

References 28 publications

Evidence for nanocoulomb charges on spider ballooning silk

Evidence for nanocoulomb charges on spider ballooning silk

Broad-scale rather than fine-scale environmental variation drives body size in a wandering predator (Araneae, Lycosidae)

Biogeographic position and body size jointly set lower thermal limits of wandering spiders

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