scholarly journals Trial‐and‐error derivation of aggressive‐mimicry signals byBrettusandCyrba, spartaeine jumping spiders (Araneae: Salticidae) from Israel, Kenya, and Sri Lanka

2002 ◽  
Vol 29 (2) ◽  
pp. 95-117 ◽  
Author(s):  
Robert R. Jackson
Keyword(s):  
Sri Lanka ◽  
Trial And Error ◽  
Aggressive Mimicry ◽  
Jumping Spiders

TRIAL-AND-ERROR SOLVING OF A CONFINEMENT PROBLEM BY A JUMPING SPIDER, PORTIA FIMBRIATA

Behaviour ◽  
2001 ◽  
Vol 138 (10) ◽  
pp. 1215-1234 ◽  
Author(s):  
Robert Jackson ◽  
Chris Carter ◽  
Michael Tarsitano
Keyword(s):  
The Other ◽  
Trial And Error ◽  
Jumping Spider ◽  
Aggressive Mimicry ◽  
Jumping Spiders ◽  
Test Algorithm

Abstract Portia is a genus of web-invading araneophagic jumping spiders known from earlier studies to derive aggressive-mimicry signals by using a generate-and-test algorithm (trial-and-error tactic). Here P. fimbriata's use of trial-and-error to solve a confinement problem (how to escape from an island surrounded by water) is investigated. Spiders choose between two potential escape tactics (leap or swim), one of which will fail (bring spider no closer to edge of tray) and the other of which will partially succeed (bring spider closer to edge of tray). The particular choice that will partially succeed is unknown to the spider. Using trial-anderror, P.fimbriata solves the confinement problem both when correct choices are rewarded (i.e. when the spider is moved closer to edge of tray) and when incorrect choices are punished (i.e. when the spider gets no closer to edge of tray).

Olfactory cues from conspecifics inhibit the web-invasion behavior of Portia, web-invading araneophagic jumping spiders (Araneae: Salticidae)

1993 ◽  
Vol 71 (7) ◽  
pp. 1415-1420 ◽  
Author(s):  
Marianne B. Willey ◽  
Robert R. Jackson
Keyword(s):  
Olfactory Cues ◽  
Adult Males ◽  
Aggressive Mimicry ◽  
Jumping Spiders ◽  
Web Geometry ◽  
Adult Females ◽  
Conspecific Adult ◽  
Invasion Behavior ◽  
Courtship Displays ◽  
The Web

Portia is a genus of web-invading araneophagic spiders that use aggressive mimicry to capture their spider prey. In an experimental study, we demonstrate that adult females of Portia africana, P. fimbriata, P. labiata, and P. schultzi produce olfactory cues that affect the behavior of conspecific adult males, adult females, and juveniles. The olfactory cues of Portia spp. inhibit aggressive mimicry of conspecific spiders that are on a prey spider's web even if the prey spider is visible. This inhibition occurs regardless of the prey spider's web geometry. Prey pursuit by Portia is also inhibited when conspecific females provide olfactory cues in cases where the prey is a spider inhabiting a web. Olfactory cues from adult females elicit courtship displays of conspecific males when males are on the prey spider's web. Portia spp. do not alter their behavior when exposed to olfactory cues of heterospecifics.

scholarly journals On three new species of jumping spiders of the genera Habrocestum Simon, 1876, Stenaelurillus Simon, 1886 and Tamigalesus Żabka, 1988 (Araneae, Salticidae) from Sri Lanka

2020 ◽  
Vol 4 (1) ◽  
pp. 5-19
Author(s):  
Nilani Kanesharatnam ◽  
Suresh P. Benjamin
Keyword(s):  
New Species ◽  
Sri Lanka ◽  
Jumping Spiders ◽  
New Material ◽  
Three New Species

Three new species of litter-dwelling jumping spiders, Habrocestum liptonisp. nov., Stenaelurillus ilesaisp. nov., and Tamigalesus fabussp. nov. are described from Sri Lanka. In addition, T. munnaricus is redescribed based on the new material from Sri Lanka.

scholarly journals Three new generic records and descriptions of four new species of jumping spiders (Araneae, Salticidae) from Sri Lanka

2016 ◽  
Author(s):  
Nilani Kanesharatnam ◽  
Suresh P. Benjamin
Keyword(s):  
New Species ◽  
Sri Lanka ◽  
Jumping Spiders ◽  
New Material ◽  
Three New Species ◽  
First Time ◽  
One New Species

The salticid genera Bristowia Reimoser, 1934, Habrocestum Simon, 1876 and Macaroeris Wunderlich 1992 are reported from Sri Lanka for the first time. One new species of Bristowia, B. gandhii sp. nov. (♂♀), and three new species of Habrocestum, H. hantaneensis sp. nov. (♂♀), H. kodigalaensis sp. nov. (♂♀) and H. ohiyaensis sp. nov. (♂), are described and diagnosed. The male of Macaroeris nidicolens Walckenaer, 1802 is redescribed and illustrated, based on new material from Sri Lanka.

Spider Flexibly Chooses Aggressive Mimicry Signals for Different Prey By Trial and Error

Behaviour ◽  
1993 ◽  
Vol 127 (1-2) ◽  
pp. 21-36 ◽  
Author(s):  
Robert R. Jackson ◽  
R. Stimson Wilcox
Keyword(s):  
Trial And Error ◽  
Aggressive Mimicry

scholarly journals A new genus and three new species of jumping spiders (Araneae: Salticidae) from Sri Lanka

2018 ◽  
Author(s):  
Nilani Kanesharatnam ◽  
Suresh P. Benjamin
Keyword(s):  
New Species ◽  
Sri Lanka ◽  
Type Species ◽  
New Genus ◽  
Jumping Spiders ◽  
Two New Species ◽  
Three New Species ◽  
First Time

A new genus of jumping spiders, Bavirectagen. nov. is proposed to include the type species B. flavopuncta gen. et sp. nov. and Bavirecta exilis (Cao et al., 2016) gen. et comb. nov. Distinguishing characters of Bavirecta gen. nov. include: 1) tubular abdomen, 2) enlarged front legs, 3) straight and pointed embolus, broadest proximal lobe with black blotches, 4) prolateral tegular lobe, 5) widely separated anterior atria. Furthermore, two new species, Schenkelia aurantia sp. nov. (♂♀) and Brancus calebi (♂) sp. nov., are described and diagnosed. Mogrus frontosus (Simon, 1871) is redescribed based on a male collected from Mandaitivu Island of Jaffna District in Sri Lanka. The genera Brancus Simon, 1902, Mogrus Simon, 1882 and Schenkelia Lessert, 1927 are reported for the first time from Sri Lanka (Brancus and Schenkelia are recorded for the first time outside Africa).

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