scholarly journals Modes and Frequencies of Colonization and its Relation to extinctions, Habitat and Seasonality in the Social Spider Anelosimus Eximius in the Amazon (Araneidae: Theridiidae)

1993 ◽  
Vol 100 (1-2) ◽  
pp. 35-41 ◽  
Author(s):  
Eduardo M. Venticinque ◽  
Harold G. Fowler ◽  
Carlos A. Silva
Keyword(s):  
Social Spider ◽  
The Social

The Life-History of Badumna-Candida (Araneae, Amaurobioidea)

1993 ◽  
Vol 41 (5) ◽  
pp. 441 ◽  
Author(s):  
MF Downes
Keyword(s):  
Sex Ratio ◽  
Egg Production ◽  
Production Cycle ◽  
Social Spider ◽  
Social Spiders ◽  
Primary Sex Ratio ◽  
The Social ◽  
The Status ◽  
History Of ◽  
Changes Over Time

A two-year study of the social spider Badumna candida at Townsville, Queensland, provided information on colony size and changes over time, maturation synchrony, temperature effects on development, sex ratio, dispersal, colony foundation, fecundity and oviposition. Key findings were that B. candida outbred, had an iteroparous egg-production cycle between March and October, had an even primary sex ratio and achieved maturation synchrony by retarding the development of males, which matured faster than females at constant temperature. There was no overlap of generations, the cohort of young from a nest founded by a solitary female in summer dispersing the following summer as subadults (females) or subadults and adults (males). These findings confirm the status of B. candida as a periodic-social spider (an annual outbreeder), in contrast to the few known permanent-social spider species whose generations overlap. Cannibalism, normally rare in social spiders, rose to 48% when spiders were reared at a high temperature. This may be evidence that volatile recognition pheromones suppress predatory instincts in social spiders.

scholarly journals DNA Methylation Patterns in the Social Spider, Stegodyphus dumicola

Genes ◽  
2019 ◽  
Vol 10 (2) ◽  
pp. 137 ◽  
Author(s):  
Shenglin Liu ◽  
Anne Aagaard ◽  
Jesper Bechsgaard ◽  
Trine Bilde
Keyword(s):  
Gene Expression ◽  
Dna Methylation ◽  
Sequence Data ◽  
Social Spider ◽  
The Social ◽  
Genome Bisulfite Sequencing ◽  
Differential Gene ◽  
Methylation Patterns ◽  
Comparative Phylogenetic Analysis

Variation in DNA methylation patterns among genes, individuals, and populations appears to be highly variable among taxa, but our understanding of the functional significance of this variation is still incomplete. We here present the first whole genome bisulfite sequencing of a chelicerate species, the social spider Stegodyphus dumicola. We show that DNA methylation occurs mainly in CpG context and is concentrated in genes. This is a pattern also documented in other invertebrates. We present RNA sequence data to investigate the role of DNA methylation in gene regulation and show that, within individuals, methylated genes are more expressed than genes that are not methylated and that methylated genes are more stably expressed across individuals than unmethylated genes. Although no causal association is shown, this lends support for the implication of DNA CpG methylation in regulating gene expression in invertebrates. Differential DNA methylation between populations showed a small but significant correlation with differential gene expression. This is consistent with a possible role of DNA methylation in local adaptation. Based on indirect inference of the presence and pattern of DNA methylation in chelicerate species whose genomes have been sequenced, we performed a comparative phylogenetic analysis. We found strong evidence for exon DNA methylation in the horseshoe crab Limulus polyphemus and in all spider and scorpion species, while most Parasitiformes and Acariformes species seem to have lost DNA methylation.

INTERACTIONS BETWEEN THE SOCIAL SPIDER ANELOSIMUS STUDIOSUS (ARANEAE, THERIDIIDAE) AND FOREIGN SPIDERS THAT FREQUENT ITS NESTS

2007 ◽  
Vol 35 (1) ◽  
pp. 143-152 ◽  
Author(s):  
T. Alex Perkins ◽  
Susan E. Riechert ◽  
Thomas C. Jones
Keyword(s):  
Social Spider ◽  
The Social

Competitive foraging in the social spider Stegodyphus dumicola

1999 ◽  
Vol 58 (3) ◽  
pp. 677-688 ◽  
Author(s):  
M.E.A. Whitehouse ◽  
Y. Lubin
Keyword(s):  
Social Spider ◽  
The Social

Prey Capture Behaviour in the Social Spider Anelosimus eximius (Araneae: Theridiidae): Responses to Prey Size and Type

Ethology ◽  
2007 ◽  
Vol 113 (9) ◽  
pp. 856-861 ◽  
Author(s):  
Andréa L.T. Souza ◽  
Marcelo O. Gonzaga ◽  
João Vasconcellos-Neto
Keyword(s):  
Prey Capture ◽  
Prey Size ◽  
Social Spider ◽  
The Social
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