Diet Affects Egg Laying, Biomass, and Stable Isotope Values in Tetragnathid Spiders.

Autor: Kerr S; Department of Biology, Middle Tennessee State University, Murfreesboro, TN, 37132, USA., Otter RR; Department of Biology, Middle Tennessee State University, Murfreesboro, TN, 37132, USA. otterr@gvsu.edu.; Annis Water Resources Institute, Grand Valley State University, 740 W. Shoreline Dr, Muskegon, MI, 4941-1678, USA. otterr@gvsu.edu.
Jazyk: angličtina
Zdroj: Bulletin of environmental contamination and toxicology [Bull Environ Contam Toxicol] 2024 Mar 09; Vol. 112 (3), pp. 47. Date of Electronic Publication: 2024 Mar 09.
DOI: 10.1007/s00128-024-03872-3
Abstrakt: Riparian tetragnathid spiders are used as biosentinels of aquatic contamination because they are specialized feeders of aquatic emergent insects and are also prey items for terrestrial predators (e.g., birds). Analysis of both trophic position (e.g., stable nitrogen isotopes) and contaminant concentrations are needed to utilize tetragnathids as biosentinels, which can present challenges when collecting enough biomass to reach analytical detection limits, due to their relatively small size. The purpose of this study was to investigate the impacts of a controlled diet source on spider biomass, egg laying and stable isotope values (δ 13 C and δ 15 N). Diet significantly influenced the biomass and egg laying of tetragnathids, with some spiders losing up to 50% of their biomass in a single egg-laying event. δ 13 C had a faster turnover rate in the whole-body of spiders compared to legs, which is important, as spider legs are presently used as surrogates for whole-body δ 13 C values.
(© 2024. The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.)
Databáze: MEDLINE
Externí odkaz: