Coastal Shrimp Aquaculture in Thailand: Key Issues for Research

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118Appendix 4. Descriptive statistics for research issues in the area of genetics and broodstock.No. Research issue Impact onproductivity a67 Endocrinology of broodstock maturation68 Cost–benefit analysis of domesticatedbroodstock69 Development of techniques for sustainablebroodstock supply, preferablywith domestic broodstock70 Effect of environment and nutritionon broodstock quality71 Increase in fecundity and naupliusproduction from pond-reared broodstockto cost-effective levels72 Studies on pond production performanceof closed cycle producedpostlarvaeAchievability(time frame) b Importance c Ongoingresearch (pastand presentefforts) d+++++ medium tolongstrategic andadaptiveApplication ofresearch (i.e. targetgroup) e++ region all systemsfarms and fishing+++ short tactical + region all systemsall farms+++ medium tolong+++++ long strategic andadaptivestrategic ++ region all systemsfarms and fishing+ region all systemsfarms and fishing+++++ long strategic + region all systemsfarms and fishing++++ long strategic + region all systemsall farms73 Genetic improvement of shrimp +++++ long strategic + region all systemsall farms74 Identification of base populationsfor selection+++++ medium tolongstrategic andadaptive+ region all systemsfarms and fishingPrioritymean score & s.d.(median) f7.3 & 2.8 (8)5.3 & 2.7 (5)7.6 & 2.1 (8)7.0 & 2.0 (7)7.3 & 2.2 (7)5.7 & 2.0 (6)7.0 & 2.8 (7)5.7 & 2.5 (6)
119Appendix 4. (cont’d) Descriptive statistics for research issues in the area of genetics and broodstock.No. Research issue Impact onproductivity a75 Survey on desirable characteristicsfor genetic enhancement and evaluationof hereditability of such characteristics76 Development of uniform criteria forassessing quality of fry77 Development of high health hatcheryproduction methods78 Identification of natural stocks freeof specific diseases79 Identification and maintenance ofhealthy stocks for disease research80 Use of specific pathogen-free (SPF)broodstock for shrimp larval rearingAchievability(time frame) b Importance c Ongoingresearch (pastand presentefforts) dApplication ofresearch (i.e. targetgroup) e+++++ long strategic + region all systemsall farms+++++ short tactical ++ region all systemsall farms+++++ short tactical andstrategic+++++ short tomediumtactical andstrategic++ region all systemsall farms+ region all systemsall farms+++ short tactical ++ region all systemsfarms and research+++++ short tomediumtactical andadaptive+++ region all systemsall farmsPrioritymean score & s.d.(median) f5.7 & 2.5 (6)6.6 & 2.3 (7)7.8 & 1.7 (8)6.0 & 2.5 (7)5.0 & 2.4 (5)5.2 & 2.4 (5)a From high to low on a scale from +++++ to +.b Short (1–2 yr), medium (2–5 yr), or long (5–10 yr) term.c Strategic = long-term benefits; adaptive = adapt existing technologies; tactical = ‘fire fighting’.d From large, moderate, some or very little effort on a scale from +++++ to +.e Country of application (ranging from regional to country); type of system, ranging from extensive (e.), semi-intensive (s.i.) to intensive (i.); group which benefits (ranging fromsmall farms, big farms, community to fishing industry).f From low to high on a scale from 1 to 10, respectively (s.d. = standard deviation).
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!The 1994 Workshop had a working hy
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!The Workshop at Hat Yai, SongkhlaA
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!ReferenceSmith, P.T., ed.. 1999. T
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!Shrimp Farming in ThailandOver the
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! !Table 1. World production (# 1,0
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!Domestic and world demandJapan is
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!Intensification of farms has been
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!no significant difference between
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!Production Practices and Technique
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!use water which is almost fresh (F
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!mended quantities for application
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!the biological processes in sedime
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!factors (Fegan 1994). Environmenta
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!Acid sulphate soils occur in most
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during the rainy season, some deter
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Land subsidenceCoastal land subside
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first when an area becomes environm
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!Administration. Their work has inv
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agriculture, selects coastal land p
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Sustainability, Sustainable Develop
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cultural and environmental asset va
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$+Table 12. (cont’d) Impediments
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$#Table 12. (cont’d) Impediments
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$%Table 12. (cont’d) Impediments
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capacities of alternative organisms
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sources. This is one of the greates
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Table 13. (cont’d) Summary of the
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Boonyapiwat, S. 1989. Species of ph
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Katesombun, B. 1992. Aquaculture pr
Page 68 and 69: Sirisup, S. 1988 Socio-economic cha
Page 70 and 71: !In the preliminary analysis, the s
Page 72 and 73: !until all variables had been teste
Page 74 and 75: !quality problem over the past 3 ye
Page 76 and 77: !Figure 1. Characterisation of prov
Page 78 and 79: !Variables Contributing to Shrimp P
Page 80 and 81: !Figure 5. Relationship between ave
Page 82 and 83: !southern). The linear regression m
Page 84 and 85: !Appendix. Results of logistic regr
Page 86 and 87: !2) Trat ProvinceClassification tab
Page 88 and 89: !Chi-square df significanceModel Ch
Page 90 and 91: !8) Satun ProvinceClassification ta
Page 92 and 93: !Variables in the equationConstant
Page 94 and 95: !A total of 49 participants were in
Page 96 and 97: ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !Fi
Page 98 and 99: !All issues are listed in Appendice
Page 100 and 101: !!were short term and one issue was
Page 102 and 103: !reared broodstock (issue 71). They
Page 104 and 105: !!Two participants commented that i
Page 106 and 107: mation transfer and training. This
Page 108 and 109: 108Appendix 1. (cont’d) Descripti
Page 112 and 113: 112Appendix 2. Descriptive statisti
Page 122 and 123: Appendix 5. (cont’d) Descriptive
Page 124 and 125: Appendix 7. Descriptive statistics
Page 126 and 127: Appendix 7. (cont’d) Descriptive
Page 130 and 131: !ParticipantsAustraliaDr Paul T. Sm
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