Agricultural Research Management Information System

Home
Research Summary
Search
About Us
- ARMIS
- Brochure
Contact Us
Report
User Request
Data Input
Help
- Operation Manual
  - PDF
  - Video
- Program Area & Commodity
We have reached 37600 number of research entries at this moment.

- Logout

Research Detail

Home
Research
Detail

Diversity and Abundance of Spider Fauna at Different Habitats of Jahangirnagar University Campus, Bangladesh

Faria Farhana Rain
Department of Zoology, Jahangirnagar University, Savar, Dhaka, Bangladesh

Abdul Jabber Howlader
Department of Zoology, Jahangirnagar University, Savar, Dhaka, Bangladesh

Kabirul Bashar
Department of Zoology, Jahangirnagar University, Savar, Dhaka, Bangladesh

Abstract/ Executive Summary:

The diversity, abundance, and seasonal prevalence of spiders at different habitats of Jahangirnagar University campus was studied from March, 2013 to February, 2014. A total of 1690 individuals were recorded under 11 families, 49 genera and 116 species Family Salticidae was dominant with 16 genera under 42 species, whereas Araneidae ranked second with 26 species under 9 genera. Pholcidae and Uloboridae each had only one species. Chrysilla lautau (Salticidae), a new species, was recorded for the first time in Bangladesh. Nine different guilds of spiders were observed during the study. Jumping spiders were the most dominant, with 36.21% of the total number of spider guilds. Diversity indices of Shannon-Wiener, Simpson and Margalef were, respectively: 2.18, 0.89 and 3.39. Pielou’s evenness index was 0.91.As the spiders are excellent bio-indicators, survey of their populations at regular interval may provide important biological information about the ecological condition of the study area.

Keywords: Spiders, diversity and abundance, guild structures, Jahangirnagar University Campus

Location: Jahangirnagar University campus

Start Date: 00-03-2013

End Date: 00-02-2014

Program Area: Pest Management

Commodity: Spider

Objectives:

Due to less awareness about the spiders, its diversity study at Jahangirnagar University campus remained unexplored. Therefore, the study aims to explore the spider population with their diversity and abundance in Jahangirnagar University campus.

Methodology:

Study Period The study was carried out from March, 2013 to February, 2014. All surveys were conducted in the morning hours between 7.00 am to 9.00 am. Spiders were collected four times from four sites per week in each month and rest the days of the month was used up for sorting and identifying the macro-invertebrates. Study Area Jahangirnagar University is situated at Savar in Dhaka, 23°52´0´´E to 23°53´50´´E latitude and 90°15´20´´N to 90°16´40´´N longitude. There are a number of water bodies and open areas in the campus. It encompasses about 697.56 acres of land with diverse ecological habitats and vegetation types. The collection site has been selected into four regions according to their vegetation type. Botanical garden Botanical Garden of JU campus is enriched with various types of tress. Medicinal, beneficial, ornamental, fruit plants are most available in this area. There is a good composition of aquatic plants. The most dominating plants are Indian gooseberry (Phyllanthus emblica), mahogany (Swietenia mahagoni), jackfruit (Artocarpus heterophyllus), carambola (Averrhoa carambola), jhau (Casuarina equisetifolia), various types of bamboo (Bambusa sp.), shrubs, and herbs etc. The geographical location of this area is 23°52’22.8” N, 90° 16'414."E. Premises of Statistical Building Vegetation pattern of this area is mainly woodland type. Acacia, mahogany, Jackfruits are the dominant trees of this area. A lake is surrounded by the premises. The place is protected from public interference. The geographic location of this area is latitude 23°52'56.58"N, longitude 90°16'12.36"E. North East region of JU campus This area is mainly disturbed by human action. The vegetation type is mainly herbs, shrubs and grasslands type. The geographical location of this area is 23°53' 32.34"N, 90°16'5.46"E. Sample Collection As the central part of the country and situated in the subtropical zone, the climate is tropical monsoon. There is summer (March-May), monsoon (July-October) and winter (November-February). Random sampling was done from different habitats of Jahangirnagar University campus in all the seasons. Spiders were collected by adopting standard sampling techniques such as sweep netting, beating sheets, active searching and handpicking. Preservation The collected samples were brought to the entomology lab of the Zoology Department, Jahangirnagar University. Spiders were anesthetized with chloroform and placed separately on vials with ethyl alcohol 75%. The collection dates, collection site, amount of spider number were recorded on each vial. Identification Spiders were observed under stereo zoom microscopes and specimens were identified using standard taxonomic keys. Data Analysis All data were recorded subject to analysis with the help of Microsoft Excel office 2010. The diversity of spiders was analyzed by the following indices: Shannon-Wiener Diversity Index This index is an index applied to biological systems by derived from a mathematical formula used in the communication area by Shannon and Wiener. It’s the most preferred index among the other diversity indices. The index values are between 0.0 – 5.0. Results are generally between 1.5 – 3.5, and it exceeds 4.5 very rarely. The values above 3.0 indicate that the structure of the habitat is stable and balanced; the values under 1.0 indicate that there are pollution and degradation of habitat structure.

Source of Information: Journal of Entomology and Zoology Studies 2016; 4(5): 87-93 E-ISSN: 2320-7078 P-ISSN: 2349-6800

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The study on spiders is completely untouched in the Jahangirnagar University campus, although this area is enriched with flora and fauna. The study is the baseline information over the ecology, and importance of spider species. The rich floral and faunal diversity in the Jahangirnagar University campus is the key to build the microhabitats of different species. The study will also support the effort for the conservation of the species and specify the hidden benefits in them. The result of the present study showed that a great variety of spiders exists in the study areas. One can undertake research work on individual species as the climatic conditions supports the spider fauna to multiply as there is little human interference in their habitats. Research work on the biology of spiders including their web construction, food and feeding habitats, physiology, reproduction and life history can be done here that may lead to a new door for the conservation of spider species.

Knowledge Management: Journal