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• The Study on Diversity of Spiders (Araneae, Arachnida) in the Mangrove Forest at Con Trong, Ong Trang Estuary, Ca Mau Province

  Nguyen Tran Thuy Thanh Mai, Nguyen Van Huynh, Tran Triet

  Received: 18-06-2013 / Accepted: 18-08-2013

   Abstract PDF (VIETNAMESE)

  This study examines the diversity and distribution of spiders in the mangrove areas in Con Trong, Ong Trang estuary, Ca Mau Province. Faunal samples taken along 4 transects and from 5 zones of Con Trong mangrove forest for two seasons (dry and wet), yielded a total of 440 spiders representing 54 species belonging to 14 families. Four families represented 81% of all spiders collected, with Tetragnathidae being the most abundant representing 35% over all, followed by the Araneidae with 16%, the Oxyopidae with 15% and Salticidae with 15%. Two species Tetragnatha nitens Audouin 1826 (Tetragnathidae) and Oxyopes matiensis Barrion & Litsinger, 1995 (Oxyopidae) were determined as the dominant species. Diversity of spider in Sonneratia-Avicenniahabitat (OTSAv) of Con Trong mangrove forest at Ong Trang estuary is the highest.

• Study of Guild of Spider Fauna (Araneae, Arachnida)at Cu Lao Dung Mangrove Forest, Soc Trang Province

  Nguyen Tran Thuy Thanh Mai, Tran Triet, Nguyen Van Huynh

  Received: 27-08-2013 / Accepted: 12-11-2013

   Abstract PDF (VIETNAMESE)

  The order Araneae deserves a special place in the study of ecology as it acts as a biological indicator. The objectives of the present study were to explore the guild composition and structure of spider families at Cu Lao Dung mangrove forest, Soc Trang Province. Efforts were made to evaluate the ecosystem status of Cu Lao Dung mangrove forest by surveying the diversity and species composition of spiders (class Arachnida, phylum Arthropoda). A total of 58 species of spiders belonging to 14 families were observed, Salticidae being the family with most species (23 scpecies)and accounting for39,7%. Based on classification byCardoso et al. (2006),six different guilds of spiderwere identified: orb web weavers and other hunters (29%), sheet web weavers and ground hunters (14%), space web weavers and ambush hunters (7%). This is the first report of the spider fauna from Cu Lao Dung mangrove forest.