L40 _4 Dec, final ppt_- Sustainable Development _Ko_ _to be available_-1

L40 _4 Dec, final ppt_- Sustainable Development _Ko_ _to be available_-1

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(1) Sustainable Development (Case Study: Fisheries) (2) Urban Development AFCD For (1): z Miller (2003): Chapter 16 z Agriculture, Fisheries and Conservation Department (AFCD) (http://www.afcd.gov.hk/fisheries/fish_e.htm) For (2): z Cunningham and Cunningham (2009): Chapter 14 z Miller (2003): Chapter 11 Ice Ko
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Lecture Outline 1. Sustainable Development z Case study (1): Fisheries 2. Urban Development z Case Study (2): Curitiba
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1. Sustainable Development
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What is Sustainable Development? Sustain = Maintain Sustainable Development = Development that meets the needs of the present without compromising the ability of future generations to meet their own needs (World Commission on Environment and Development 1987) www.susdev.gov.hk
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Case Study (1): Fisheries Fisheries: The third major food producing system after cropland and grazing land. • In Asia, 1 billion people rely on fish as their primary source of protein Employs ~200 million people worldwide AFCD FAO
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Miller (2003) Fishery Terminologies Smaller scale fisheries also based on • Sea urchins •Seacucumbers •Je l lyf
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Capture fisheries: Wild-caught fish z Sea z Mainly from plankton-rich coastal waters (but, coastal pollution!) z Inland water bodies (e.g. lakes, ponds, rivers, reservoirs) Aquaculture: Farmed or cultured fish z Raising marine and freshwater fish in ponds and underwater cages AFCD Fishery Terminologies (cont)
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Overfishing Sustainable Yield = Highest rate at which a potentially renewable resource can be used without reducing its available supply in an area When Harvest > Sustainable Yield (of a species) Æ Overfishing Æ Too little breeding stock are left to maintain numbers Many marine resources have been overfished!
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Commercial Extinction Prolonged overfishing Æ Commercial extinction of a fish stock = Population of a species declines to the point at which it is no longer profitable to harvest for them When one species becomes overfished Æ Move on to another species and overfish that as well
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Bycatch Non-target fish that are caught in nets and then thrown back into the sea, usually dead or dying . Fisheries: Also depleted by high levels of bycatch
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L40 _4 Dec, final ppt_- Sustainable Development _Ko_ _to be available_-1

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