Tuesday, March 21, 2017

Fish community dynamics in an inland floodplain system of the Okavango Delta, Botswana

By Ketlhatlogile Mosepele, Jeppe Kolding & Thethela Bokhutlo

Abstract

Tropical floodplain fish populations fluctuate at temporal scales and understanding the variability in these systems will contribute to comprehensive management of these resources. Therefore, the aim of this study was to assess the dynamics of a floodplain fish assemblage. Data were collected using standard methods between 1999 and 2009 from the delta's panhandle. Various analytical tools (e.g. CCA, SIMPER, ANOVA, etc.) were used to assess fish assemblage dynamics at seasonal and annual scales. ANOVA and cluster analyses showed that the fish assemblage underwent significant changes along the seasonal hydrograph, while index of relative aboundance (%IRI) revealed that the fish assemblage was dominated by Clarias gariepinus, Schilbe intermedius and Hydrocynus vittatus respectively. These species, including Clarias ngamensis and Marcusenius altisambesi, contributed more than 50% to variations in fish assemblage structure along the seasonal hydrograph (based on SIMPER analysis). Furthermore, canonical correspondence analysis (CCA) revealed a significant (p = 0.004) association between environmental factors and fish assemblage structure. CCA analysis also showed that spawning for different species is associated with various environmental factors. Annually, results showed that C. gariepinus dominated the fish assemblage during low flood years, while S. intermedius dominated during high flood years. Detrended correspondence analysis (DCA) showed that the hydrological gradient had a significant effect on fish assemblage structure at an annual scale, while SIMPER analysis established significant variations in fish assemblage structure among years characterized by different hydrological features. One major conclusion we made was that fish assemblages are stochastically different at an annual scale. This study contributes knowledge to floodplain fish ecology and thus enhances fisheries management.

Friday, March 17, 2017

NEW BOOKS

ORI library has received a batch of new books. Visit the library and pick yours!!

See You!

Tuesday, March 07, 2017

Global Fisheries’ Sunken Billions

Billions of dollars are lost at sea but different paths to fisheries reform show promising results
  • New economic analysis reveals that, because of over fishing, global fisheries forego more than$80 billion a year, compared to an optimal scenario.
  • Allowing fish stocks to bounce back to healthier levels would cut losses and create revenue for long-term growth, while helping fisheries adapt to climate change and meet global demand for seafood.
  • Experience in several countries shows there are multiple ways to arrive at a more sustainable and profitable level of fishing. 
For more Info visithttp://www.worldbank.org/en/news/feature/2017/02/14/global-fisheries-sunken-billions

Monday, March 06, 2017

Global Economic Prospects: Weak Investment in Uncertain Time

Stagnant global trade, subdued investment, and heightened policy uncertainty marked another difficult year for the world economy. A moderate recovery is expected for 2017, with receding obstacles to activity in commodity exporters and solid domestic demand in commodity importers. Weak investment is weighing on medium-term prospects across many emerging markets and developing economies (EMDEs). Although fiscal stimulus in major economies, if implemented, may boost global growth above expectations, risks to growth forecasts remain tilted to the downside. Important downside risks stem from heightened policy uncertainty in major economies.

Thursday, March 02, 2017

CIPA 26th symposium: Digital Workflows for Heritage Conservation

CIPA is the Scientific Committee on Heritage Documentation for the International Committee on Monuments and Sites (ICOMOS). CIPA2017, the 26th biennial symposium, will be held from August 28 to September 1, 2017, in Ottawa, Canada. CIPA2017 will focus on Digital Workflows for Conservation.

The rapid rise in new digital technologies has revolutionized the practice of recording heritage places. Digital tools and media offer a myriad of new opportunities for collecting, analyzing and disseminating information about heritage sites. With new opportunities, there are also conflicts, and an intense effort to incorporate digital media into the education of conservation professionals. Issues regarding the proper, innovative and research-focused uses of digital media in heritage conservation are urgent topics in the global heritage conservation field, and CIPA and its partners have played a leading role in this area of cross-disciplinary research and practice. The symposium will offer a unique opportunity for educators, professionals, heritage institutions, and managers of heritage places to share, exchange, and explore new approaches, best practices, and research results in the area of these workflows.

Tuesday, February 07, 2017

Grasses and Grazers of Botswana and the Surrounding Savanna

 By H. GAREKAE, O.T. THAKADU and J. LEPETU
 
Understanding conservation attitudes of local communities is essential to the long-term sustainable management of natural resources such as forests. This paper, guided by the Social exchange theory, examined attitudes of local communities towards management of Chobe Forest Reserve (CFR) and explored factors influencing conservation attitudes in the study area. A survey instrument was administered to 183 households, randomly sampled across three communities adjacent to CFR. Additionally, in-depth interviews with selected key informants were conducted. Both descriptive and inferential statistics were used for analysing data. The study findings revealed that communities generally held positive attitudes towards forest conservation. Place of residence, age, length of residency and forest dependency were observed to be significantly influencing attitudes towards forest conservation. For sustainable forest management and conservation to be achieved, it is vital that community's needs and aspirations, their attitudes and perceptions regarding conservation are considered and factored into strategies and management planning.

 

Read more: https://www.researchgate.net/publication/303634524_Attitudes_of_Local_Communities_Towards_Forest_Conservation_in_Botswana_A_Case_Study_of_Chobe_Forest_Reserve