Evidence for panmixia despite barriers to gene flow in the southern African endemic, Caffrogobius caffer (Teleostei: Gobiidae)

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Stellenbosch Media Forum 2008

Stellenbosch Media Forum is an annual publication written and produced by the BPhil (Journalism) class of that specific year in the Department of Journalism, Stellenbosch University.Earlier this year Koos Bekker, owner of Media24, said he would not buy the New York Times even though his company could afford it. According to Moneyweb.co.za Bekker said the days of print media are numbered and the New York Times is old news. Die afgelope klompie jare het die media 'n transformasie ondergaan. In Suid-Afrika spesifiek is talle beperkinge op die media in die post-94-era opgehef. Die media funksioneer in 'n vryemark-stelsel en die algemene persepsie is dat dit meer fokus op die kommersiele as tevore. Met die ekonomiese afplatting is daar boonop gerugte van personeelverminderings en word selfs meer verwag van die Gideonsbende wat in die nuuskantore oorbly. Exposure to a variety of TV channels and internet websites is increasing the visual stimulation of media audiences. Media products are being redesigned to satisfy specific needs, in specific niches. One big change in terms of design is that more - and bigger - visuals and less text are being used. Vanjaar het e.tv die eerste 24-uur-nuuskanaal in Suid-Afrika geloods en al hoe meer drukmediaprodukte fokus op hul aanlyn-teenwoordigheid. Die Mail & Guardian het in Junie sy webtuiste herontwerp en sy groepblog, Thoughtleader, het die prys vir die Beste Suid-Afrikaanse Blog in die 2008 Suid-Afrikaanse Blogtoekennnings gekry. The Times, die Sunday Times se interaktiewe dagblad, het vanjaar sy eerste verjaarsdag gevier en bewys (sover) dat die konsep van 'n koerant wat met 'n webblad geintegreer is, wel werk. We are living in exciting times as far as development in the media is concerned. And that is why this year's edition of SMF has as its theme "Change in the media". Die veranderende media is hoofsaaklik te danke aan die ontwikkeling van tegnologie, soos dat jy jou nuus op jou selfoon kan kry. Nuttig, veral in Suid-Afrika waar die toegang tot breebandinternet gebrekkig is. Die koms van blogs noop koerante nou om onmiddellikheid en interaksie na te volg. These developments also influence journalists, sources and their audiences. With the advent of democracy in South Africa, changes in the consumer demographics of certain media products have occurred. And, oh yes, women have also advanced in the media since 1994, both as producers of media, and how they are represented. And then there is the youth, who "owns" new media technologies. And the disabled, who can get access to a new world through media technology. But, there are still many people in South Africa who do not have access to media, because of socio-economic circumstances: too poor to own the latest technology; illiterate and forgotten by the media elites. Die rol van die media, om debat te stimuleer, as waghond op te tree en die stem van die stemloses te wees, word deur al hierdie veranderings uitgedaag. Toenemende kommersialisering kan mediavryheid van binne erodeer. En dan is daar steeds die moontlikheid van politieke inmenging, al is mediavryheid grondwetlik verskans. Tradisionele kunsvorme in die media, soos kortverhale, radiodramas en boekresensies word gemarginaliseer, maar tog is daar die moontlikheid dat hulle kan aanpas en bly voortbestaan. Another challenge is the media's coverage of environmental issues, which has to be in sync with the phenomenon of global warming. Sport reporting also has to adapt to new developments, with sport writers now needing to have a knowledge of economics and politics as well. Een ding is seker: maatskappye, mense, produkte en onderwerpe wat by die media betrokke is, sal soos 'n verkleurmannetjie moet aanpas om te kan oorleef

Evidence for panmixia despite barriers to gene flow in the southern African endemic, Caffrogobius caffer (Teleostei: Gobiidae).

BackgroundOceanography and life-history characteristics are known to influence the genetic structure of marine species, however the relative role that these factors play in shaping phylogeographic patterns remains unresolved. The population genetic structure of the endemic, rocky shore dwelling Caffrogobius caffer was investigated across a known major oceanographic barrier, Cape Agulhas, which has previously been shown to strongly influence genetic structuring of South African rocky shore and intertidal marine organisms. Given the variable and dynamic oceanographical features of the region, we further sought to test how the pattern of gene flow between C. caffer populations is affected by the dominant Agulhas and Benguela current systems of the southern oceans.ResultsThe variable 5' region of the mtDNA control region was amplified for 242 individuals from ten localities spanning the distributional range of C. caffer. Fifty-five haplotypes were recovered and in stark contrast to previous phylogeographic studies of South African marine species, C. caffer showed no significant population genetic structuring along 1300 km of coastline. The parsimony haplotype network, AMOVA and SAMOVA analyses revealed panmixia. Coalescent analyses reveal that gene flow in C. caffer is strongly asymmetrical and predominantly affected by the Agulhas Current. Notably, there was no gene flow between the east coast and all other populations, although all other analyses detect no significant population structure, suggesting a recent divergence. The mismatch distribution suggests that C. caffer underwent a population expansion at least 14,500 years ago.ConclusionWe propose several possible life-history adaptations that could have enabled C. caffer to maintain gene flow across its distributional range, including a long pelagic larval stage. We have shown that life-history characteristics can be an important contributing factor to the phylogeography of marine species and that the effects of oceanography do not necessarily suppress its influence on effective dispersal

LIP Woordfeeskoerant 2008

The LIP Woordfeeskoerant is an independent Woordfees festival newspaper produced by the BPhil (Journalism) class of that specific year in the Department of Journalism, Stellenbosch University.Lize Beekman het geskryf woorde het vlerke. Dit maak vir my sin. Tyd kan glo vlieg en toe ons met woorde begin werk om LIP aanmekaar te sit, het dit ‘n realiteit geword. Woorde kan ook vlieg! Dit vlieg ver en kry voete. Daar waar dit aanklank vind, ontstig, ontroer, laat lag, laat huil, laat hoendervleis kry en waardering kweek. Dit trap diep op plekke, skop elders, drentel hier en hardloop daar, maar staan nooit stil nie. In al hierdie oomblikke kry woorde betekenis en gee aan die leser vlerke om te reis waar praat, luister en kyk nie kan nie. Ek glo dis wat LIP vir jou gaan doen. Daar was te veel stories en te min papier. Ons moes woorde sny en wysig. Ek dink aan die skitterende Drukkoker en ‘n Ander Tongval waarby ons weens logistieke redes nie by uitgekom het nie. Daarom noem ek hulle nou! Ons woorde is steeds eerlik, speels en dartelend. Dis goed so! Lekker Lip-aflek