• Proceedings of the Korea Society of Environmental Biology Conference
• /
• 2002.05a
• /
• pp.11-11
• /
• 2002

• Proceedings of the Zoological Society Korea Conference
• /
• 2001.04a
• /
• pp.56.1-56
• /
• 2001

Amaurobiidae ; Coelotes wugeshanensis sp. nov. ; C. yanlingensis sp. nov. ; China

• Journal of Ecology and Environment
• /
• v.32 no.3
• /
• pp.177-182
• /
• 2009

The optimal strategy for semelparous females may involve adjustments in the relative investment in two fitness components, the number of offspring and the post-hatching investment per capita. To determine the pattern of maternal resource allocation to offspring in the matriphagous spider, Amaurobius ferox (Amaurobiidae), I investigated the relationship between maternal body-mass and the number of offspring, and quantified the transfer of maternal body-mass to the offspring via different forms of maternal provisioning (trophic egg-laying and matriphagy). There was a positive relationship between female body-mass and the number of offspring. However, Amaurobius mothers did not produce more trophic eggs when they had larger broods. Rather, spiderlings in larger A. ferox broods consumed larger quantities of maternal body-mass via matriphagy. Mothers transferred $28.8{\pm}6.5%$ of their body-mass to the spiderlings via trophic egg-laying, and an estimated $39.0{\pm}12.5%$ of their body-mass was transferred to the spiderlings via matriphagy.

• Animal cells and systems
• /
• v.10 no.2
• /
• pp.49-64
• /
• 2006

Two spider species of the genus Asiacoelotes collected from various areas of South Korea are reviewed with spination on each leg, detailed illustrations including trichobothrium patterns and SEM photographs of male palpal organs and female epigynum. These two species, A. songminjae (Paik &Yaginuma, 1969) and A. insidiosus (L. Koch, 1878), have been confused in Korea and Japan because they were previously incompletely described. A. songminjae is redescribed from the neotype and is here synonymized with A. tropidosatus (Wang & Zhu, 1991). A. insidiosus is recorded for the first time in Korea.

• Journal of Ecology and Environment
• /
• v.30 no.3
• /
• pp.277-280
• /
• 2007

Social spiders consistently show highly female-biased sex ratios. However, the sex ratio of subsocial spiders, which have been suggested as an intermediate stage of the evolutionary pathway towards permanent sociality, is generally unknown. We investigated the sex ratio and approximate date of fertilization of the subsocial spider, Amaurobius ferox Walckenaer (Araneae: Amaurobiidae). Investigation over 2 years revealed that sex ratio of A. ferox was consistent across years and averaged 0.49. By early May $(1^{st}{\sim}10^{th})$, 66.6% of female A. ferox observed in the field had already been inseminated, and by late May $(21^{st}{\sim}31^{th})$, 95.4% of females had been inseminated. This result suggests that A. ferox need a long time or cold temperatures to prepare them for reproduction after the developmental attainment of the adult stage.

• Proceedings of the Zoological Society Korea Conference
• /
• 2000.10a
• /
• pp.117.2-117
• /
• 2000

No Abstract, See Full Text

• Proceedings of the Zoological Society Korea Conference
• /
• 2003.08a
• /
• pp.156.1-156
• /
• 2003

No Abstract, See Full Text

• Animal Systematics, Evolution and Diversity
• /
• v.24 no.1
• /
• pp.143-145
• /
• 2008

The first known males of the spider Alloclubionoides ovatus (Paik, 1976) from Korea are described with detailed illustrations, spination of each leg and trichobothrium patterns. Males have a large conductor expanded curvedly 'p'-shaped with thin membrane of distal end surrounded the linear embolus and slender embolus penetrating tegulum.

• Journal of Ecology and Environment
• /
• v.30 no.4
• /
• pp.315-318
• /
• 2007

Cooperative or non-territorial permanently social spiders are believed to have evolved from species showing subsocial maternal care. The transition from subsocial to cooperative social groups probably involved a transition from an outbreeding breeding system to one with inbreeding. Nepotistic recognition among siblings should facilitate the evolution of social cooperation through avoidance of inbreeding and maintenance of mutual tolerance between siblings. We conducted experiments to determine whether a mechanism for sibling recognition is present in the subsocial spider, Coelotes terrestris which displays extended maternal care in the form of food provisioning. The numbers of surviving individuals within unfed groups were observed and compared between non-sibling groups of ten spiderlings and groups of ten siblings. The number of survivors differed significantly between groups, with consistently fewer spiderlings surviving in the non-sibling groups than the sibling groups over the study period. This result suggests that sibling recognition and nepotism do occur in this subsocial species. The nepotism involved in the maternal social organization of the Coelotes might be an example of a preadaptation facilitating the evolution of permanent social life.

• Korean Journal of Environmental Biology
• /
• v.28 no.2
• /
• pp.108-113
• /
• 2010

Spider fauna of Mt. Gajisan in Miryang, Gyeongsangnam-do was investigated from June to October. Collecting spiders was made by sweeping, beating, sieving and pitfall trapping. Total 66 species of 59 genera belonging to 20 families were identified from 317 collected spiders. Species richness was high in Salticidae (12 species, 20.0%), Theridiidae (8 species, 12.1%), Linyphiidae (5 species, 7.6%), Araneidae, Corinnidae, Gnaphosiade and Thomisidae (4 species, 6.1% repectively), Tetragnathidae, Amaurobiidae and Philodromidae (3 species, 4.5% repectively). Zoogeographical species were 1 Pantropical species (1.5%), 4 Palearctic species (6.1%) and 3 Korean endemic species (4.5%). This result will be a valuable monitoring data in comparative study of mountain spiders.