Ecology | VOL. 56
Read

Food Limitation of the Spider Linyphia marginata: Experimental Field Studies

Publication Date May 1, 1975

Abstract

Field experiments were performed to determine whether the spider Linyphia marginate C. L. Koch is food limited, and, if so, whether a shortage of prey acts as a density- independent or density-dependent limiting factor. The experiments uncovered the effects of food supply, spider density, and the interaction of food and density upon survival (combined effects of migration and mortality), rate of increase in weight, and fecundity. Replicate, un- enclosed spider populations were established at two densities, and natural food levels were supplemented by fruit flies added to the spider webs in one-half of the populations at each density. Adding food to the webs of immature spiders did not improve survival at either low or high spider density. Survival was lower in the high-density populations. Supplementing the food supply of immatures did increase the rate at which they gained weight. Density, how- ever, had no negative effect on growth rate, indicating that though a shortage of food limits growth, immature spiders are not competing for food. Hence, for immature L. marginata, food supply acts as a density-independent limiting factor. For mature 9 9, supplementing the food supply improved survival and increased fecundity. Spider density had a negative effect upon both survival and fecundity. There were no statis- tically significant interactions between food supply and density, probably because not enough food was added. It appears that mature L. marginate compete for food; hence, for them, food supply acts as a density-dependen...

Concepts

Spider Density Rate Of Increase In Weight Food Supply High Spider Density Immature Spiders Negative Effect Increase In Weight High-density Populations Spider Webs Field Experiments

Round-ups are the summaries of handpicked papers around trending topics published every week. These would enable you to scan through a collection of papers and decide if the paper is relevant to you before actually investing time into reading it.

Coronavirus Research Articles published between Sep 26, 2022 to Oct 02, 2022

R DiscoveryOct 03, 2022
R DiscoveryArticles Included:  5

Introduction: Test solutions (Biotrue, renu Advanced [Bausch and Lomb], ACUVUE RevitaLens [Johnson and Johnson Vision], cleadew [Ophtecs corp.] or AOS...

Read More

Good health Research Articles published between Sep 26, 2022 to Oct 02, 2022

R DiscoveryOct 03, 2022
R DiscoveryArticles Included:  2

Patient and public involvement in health care is considered indispensable in the way we conduct daily pediatric neurology practice, and in the develop...

Read More

Quality Of Education Research Articles published between Sep 26, 2022 to Oct 02, 2022

R DiscoveryOct 03, 2022
R DiscoveryArticles Included:  5

Ingenta is not the publisher of the publication content on this website. The responsibility for the publication content rests with the publishers prov...

Read More

Gender Equality Research Articles published between Sep 26, 2022 to Oct 02, 2022

R DiscoveryOct 03, 2022
R DiscoveryArticles Included:  3

Introduction: As of early March 2022, the COVID-19 pandemic has killed more 5.9 million people worldwide, and infected more than 437 million.

Read More

Coronavirus Pandemic

You can also read COVID related content on R COVID-19

R ProductsCOVID-19

ONE PROBLEM . ONE PURPOSE . ONE PLACE

Creating the world’s largest AI-driven & human-curated collection of research, news, expert recommendations and educational resources on COVID-19

COVID-19 Dashboard

Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on “as is” basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The Copyright Law.