Articles by Author: Sascha M Kirchner

Search results for Sascha M Kirchner

We found 15 results for you
  1. Pre-harvest Curing: Effects on Skin Adhesion, Chemical Composition and Shelf-life of Sweetpotato Roots under Tropical Conditions

    Pre-harvest Curing: Effects on Skin Adhesion, Chemical Composition and Shelf-life of Sweetpotato Roots under Tropical Conditions

    Item type: Journal Article • Journal: East African Agricultural and Forestry Journal
    Excoriation (skinning injury) is a serious post-harvest problem for sweetpotato roots. In industrialized countries, sweetpotatoes are exposed to post-harvest curing to facilitate skin toughening and wound healing. However, in developing regions, such a practice is barely undertaken. Pre-harvest curing (PHC),...
  2. An economic valuation of the Namibian recreational shore-angling fishery

    An economic valuation of the Namibian recreational shore-angling fishery

    Item type: Journal Article • Journal: South African Journal of Marine Science
    A roving creel survey of recreational shore-anglers in Namibia was used to determine catch and effort of line-fishing. A stratified sample of 240 anglers was surveyed to determine expenditures. Results showed that, between October 1996 and September 1997, some 8...
  3. Observations on the linefish resources of Namibia, 1990?2000, with special reference to West Coast steenbras and silver kob

    Observations on the linefish resources of Namibia, 1990?2000, with special reference to West Coast steenbras and silver kob

    Item type: Journal Article • Journal: South African Journal of Marine Science
    The Namibian linefishery is a multisector fishery, with recreational and commercial sectors targeting overlapping species. Prior to 1990, catch data were recorded for the boat sector, but little research was done on the population dynamics of any of the species...
  4. The orange roughy fishery of Namibia: lessons to be learned about managing a developing fishery

    The orange roughy fishery of Namibia: lessons to be learned about managing a developing fishery

    Item type: Journal Article • Journal: South African Journal of Marine Science
    Exploration for orange roughy Hoplostethus atlanticus in Namibia started in 1994 and within 12 months several aggregations had been discovered, suggesting the existence of a biomass sufficient to support a viable fishery. At that early stage it was realized that...
  5. Development of Bayesian stock assessment methods for Namibian orange roughy <em>Hoplostethus atlanticus</em>

    Development of Bayesian stock assessment methods for Namibian orange roughy <em>Hoplostethus atlanticus</em>

    Item type: Journal Article • Journal: South African Journal of Marine Science
    Bayesian methods are useful in fisheries stock assessment because they provide a conceptually elegant and statistically rigorous approach to making decisions under uncertainty. The application of Bayesian stock assessment methods in the management of Namibian orange roughy Hoplosthethus atlanticus within...
  6. Age and growth of two populations of West Coast steenbras Lithognathus aureti in Namibian waters, based on otolith readings and mark-recapture data

    Age and growth of two populations of West Coast steenbras Lithognathus aureti in Namibian waters, based on otolith readings and mark-recapture data

    Item type: Journal Article • Journal: South African Journal of Marine Science
    Age and growth of West Coast steenbras Lithognathus aureti, sampled from two separate populations (northern and southern) along Namibia's coast, was determined using sectioned otoliths, and the results were validated using mark-recapture data. For both populations, the special three-parameter Von...
  7. An assessment of the current status and potential yield of Namibia's northern West Coast steenbras <em>Lithognathus aureti</em> population

    An assessment of the current status and potential yield of Namibia's northern West Coast steenbras <em>Lithognathus aureti</em> population

    Item type: Journal Article • Journal: South African Journal of Marine Science
    Two distinct populations of West Coast steenbras Lithognathus aureti are found in Namibian waters; one, the northern population, is exploited recreationally and commercially. Data collected between 1995 and 1999 were used to evaluate its current state and potential yield, using...
  8. Growth of Namibian silver kob <em>Agyrosomus inodorus</em> based on otoliths and mark-recapture data

    Growth of Namibian silver kob <em>Agyrosomus inodorus</em> based on otoliths and mark-recapture data

    Item type: Journal Article • Journal: South African Journal of Marine Science
    The growth of silver kob Argyrosomus inodorus sampled from two regions (northern and southern) along the Namibian coast was determined using longitudinally sectioned otoliths. The special Von Bertalanffy growth model adequately described the growth of kob in both regions. Growth...
  9. Estimation of total catch of silver kob <em>Argyrosomus inodorus</em> by recreational shore-anglers in Namibia using a roving-roving creel survey

    Estimation of total catch of silver kob <em>Argyrosomus inodorus</em> by recreational shore-anglers in Namibia using a roving-roving creel survey

    Item type: Journal Article • Journal: South African Journal of Marine Science
    A statistical sampling method is described to estimate the annual catch of silver kob Agryrosomus indorus by recreational shore-anglers in Namibia. The method is based on the theory of progressive counts and on-site roving interviews of anglers, with catch counts...
  10. An economic comparison of the commercial and recreational linefisheries in Namibia

    An economic comparison of the commercial and recreational linefisheries in Namibia

    Item type: Journal Article • Journal: African Journal of Marine Science
    The most important Namibian linefish species, the silver kob Argyrosomus inodorus, is currently heavily exploited, and in order to ensure its survival catch restrictions are being introduced. However, kob are exploit ed oth by recreational anglers and by commercial vessels,...