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GENETIC AND MORPHOLOGICAL VARIATION OF THE
TLDR
Genetic variation was higher within than between populations with no effect of geographic barriers on population genetic divergence in this species, indicating gene flow is high between populations.
Ontogenetic changes in web architecture and growth rate of Tengella radiata (Araneae, Tengellidae)
TLDR
Spiders' sizes increase steadily in the subsequent stages, and Legs I of adult males are longer than in females, indicating an allometric growth that occurred mainly during the last molt of males.
Vestiges of an orb-weaving ancestor? The “biogenetic law” and ontogenetic changes in the webs and building behavior of the black widow spider Latrodectus geometricus (Araneae Theridiidae)
TLDR
Young juveniles of L. geometricus fit the strong trend for “ontogeny to repeat phylogeny” previously documented in other web-building spiders; younger individuals consistently built more highly organized webs, with radial lines that converge on a central, horizontal disc and that support regularly spaced, sticky “gumfoot“ lines.
Courtship behavior and copulation in Tengella radiata (Araneae, Tengellidae)
TLDR
The female has an active role during the courtship: strumming the tunnel and sheet threads, apparently inducing the male to increase the frequency and intensity of his courtship.
Environmental rugosity, body size and access to food: a test of the size-grain hypothesis in tropical litter ants
TLDR
This experimentally tested the assumption of the SGH that small ants, which have proportionally smaller legs than larger ants, are more successful in exploring environ-mental interstices because they can easily penetrate them and concluded that these results support the size grainhypothesis.
Natural History And Larval Behavior Of The Parasitoid Zatypota Petronae (hymenoptera: Ichneumonidae)
TLDR
The koinobiont ectoparasitoid Zatypota petronae Gauld (Ichneumonidae) parasitizes medium-sized immatures of the cobweb spider Theridion evexum Keyserling (Theridiidae) and Parasitism rate and host behavior are described.
Sexual behavior, cannibalism, and mating plugs as sticky traps in the orb weaver spider Leucauge argyra (Tetragnathidae)
TLDR
Females seem to determine copulation duration by altering the timing of mating plug formation and through sexual cannibalism.
Static allometry and sexual size dimorphism in Centruroides margaritatus (Scorpiones: Buthidae)
TLDR
The length of the metasoma of males, thought to be influenced by sexual rather than natural selection, did not present positive allometry as expected.
Fallen Branches as Part of Leaf‐Cutting Ant Trails: Their Role in Resource Discovery and Leaf Transport Rates in Atta cephalotes
TLDR
The results suggest that the presence of fallen branches may direct the searching effort of leaf-cutters and increase the foraging speed of laden ants when these structures are part of the trunk trail system.
Repertoire Size and Syllable Sharing in the Song of the Clay-Colored Thrush (Turdus grayi)
TLDR
Presence of shared and individually unique syllables in the repertoires indicate that imitation, and perhaps improvisation, contribute to development of the song of Clay-colored Thrushes.
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