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Titolo:
THE LIFE-HISTORY OF BADUMNA-CANDIDA (ARANEAE, AMAUROBIOIDEA)
Autore:
DOWNES MF;
Indirizzi:
JAMES COOK UNIV N QUEENSLAND,DEPT ZOOL TOWNSVILLE QLD 4811 AUSTRALIA
Titolo Testata:
Australian journal of zoology
fascicolo: 5, volume: 41, anno: 1993,
pagine: 441 - 466
SICI:
0004-959X(1993)41:5<441:TLOB(A>2.0.ZU;2-Z
Fonte:
ISI
Lingua:
ENG
Soggetto:
ANELOSIMUS-EXIMIUS ARANEAE; SOCIAL SPIDER; SEX-RATIO; THERIDIIDAE; EVOLUTION; BEHAVIOR;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
65
Recensione:
Indirizzi per estratti:
Citazione:
M.F. Downes, "THE LIFE-HISTORY OF BADUMNA-CANDIDA (ARANEAE, AMAUROBIOIDEA)", Australian journal of zoology, 41(5), 1993, pp. 441-466

Abstract

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.

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Documento generato il 25/11/20 alle ore 10:19:04