[
    {
        "id": 210241,
        "series_id": 26,
        "series_slug": "histsyn-rashkb-journal-engine",
        "series_title": "RASHKB Journal 皇家亞洲學會香港分會學刊",
        "series_use_hku_proxy": false,
        "document_key": "RAS-1984",
        "page_number": 212,
        "title": "RAS-1984",
        "content_text": "191\n\ncalculating basal metabolic rate:\n\nWhere M\n\nResults\n\nwww\n\nlog M = log 74.3 + 0.744 log W±0.074\n\nheat production in kcal day−1\n\nW = body weight in kg.\n\na) Environmental Conditions and Primary Productivity\n\nValues for environmental parameters and primary productivity (phytoplankton and simple periphyton), measured in terms of chlorophyll, are given in Table 1. Although minimum air temperature reached 5.5° in January 1979, the lowest recorded water temperature was 14.6°. In April 1978 the salinity of the water was about 50% of that of sea water (30%), but fell to a low level during the wet season. The highest values were recorded during the last four months, due probably to a combination of low rainfall and the entry of comparatively large amounts of sea water. The pH approximated to that of seawater (8.0-8.3) for much of the period but became slightly acidic in late July, August and September. Dissolved oxygen in the surface water was high throughout the experimental period and should always have been sufficient for all but the most demanding animals. Moreover, at the comparatively low salinity, the nitrate content might well have been quite high (Fogg, 1980).\n\nIn comparison with the water of Hau Hoi Wan as measured off Tsim Bei Tsui by Vrijmoed (1975), pH and dissolved oxygen were slightly higher in the kei wai, but salinity was about the same level and showed a similar seasonal fluctuation.\n\nThe most obvious element of primary production was the red alga Ceramium sp., of which 14,000-17,500 kg. (mean: 15,750 kg.) is harvested per annum. Growth is particularly prolific between the first and fifth lunar months and it is certain that some part of the total production of Ceramium would be consumed by herbivores.",
        "txt_file_path": "txt/dfo323lmgvd/RAS-1984.txt",
        "external_url": "https://digitalrepository.lib.hku.hk/catalog/5h73wh572",
        "rank": 0
    },
    {
        "id": 210250,
        "series_id": 26,
        "series_slug": "histsyn-rashkb-journal-engine",
        "series_title": "RASHKB Journal 皇家亞洲學會香港分會學刊",
        "series_use_hku_proxy": false,
        "document_key": "RAS-1984",
        "page_number": 221,
        "title": "RAS-1984",
        "content_text": "200 Y.H. CHEUNG, K.Y. TAI, S.W. TSAO AND L.B. THROWER\n\nDiscussion\n\nArguably, the traditional kei wai has two attractive economic features. The first is that it provides a method for controlled exploitation of recently-deposited alluvium. Probably, rearing of fish is the most feasible procedure for exploiting such sites and the construction of a kei wai requires much less equipment and labour than digging deep fish ponds. The second feature of the kei wai is that it facilitates exploitation of the nutrient-rich waters of an estuary to produce animal protein in a variety of forms.\n\nAn estuary has been defined as “an area in which sea water is appreciably diluted by fresh water from rivers” (Stewart, 1972). Therefore sources of energy and nutrients produced in terrestrial communities are carried by the rivers to the estuary, where tidal movement assists recycling of nutrients from consumer back to producer. This characteristic structure and function of an estuary has led to it being called a “nutrient trap” (Odum, E.P., 1971). The importance of supplements of energy and nutrients moving to the estuary from terrestrial communities has been shown clearly by Odum W.E. (1971) and Odum & Heald (1975) for a system in southern Florida. There an estuary is receiving material from an extensive mangrove community, and measurements showed that material to be more important as a basis for economic productivity than was photo-synthesis.\n\nIn considering the productivity of the waters of Hau Hoi Wan, it is relevant that Vrijmoed (1975) found that the weight of fouling organisms (invertebrate animals) accumulating on blocks of pine wood submerged for several months in Hau Hoi Wan was the greatest among the five sites she investigated within Hong Kong's coastal waters; this result reflects the high nutrient content of the water.\n\nThe inherently nutrient-rich water of the estuary is then impounded in the kei wai where it is further supplemented with nutrients and energy by the plant material that enters it. Microorganisms play an important part in fragmenting the plant material and converting much of the structural carbohydrates to protein. Consequently, the higher trophic levels have available material",
        "txt_file_path": "txt/dfo323lmgvd/RAS-1984.txt",
        "external_url": "https://digitalrepository.lib.hku.hk/catalog/5h73wh572",
        "rank": 0
    },
    {
        "id": 210252,
        "series_id": 26,
        "series_slug": "histsyn-rashkb-journal-engine",
        "series_title": "RASHKB Journal 皇家亞洲學會香港分會學刊",
        "series_use_hku_proxy": false,
        "document_key": "RAS-1984",
        "page_number": 223,
        "title": "RAS-1984",
        "content_text": "202\n\nY.H. CHEUNG, K.Y. TAI, S.W. TSAO AND L.B. THROWER\n\nReferences\n\nAnon (1979). Hong Kong 1979—a review of 1978. (Hong Kong: Government Information Services).\n\nBowen, S.H. (1980). Detrital non-protein amino acids are the key to rapid growth of tilapia in Lake Valencia, Venezuela. Science 207, 1216-1218.\n\nFogg, G.E. (1980). Phytoplanktonic primary production. In Barnes, R.S.K. & Mann, K.H. (edit) Fundamentals of Aquatic Ecosystems. (Blackwell: Oxford).\n\nHulscher, J.B. (1975). Het wad een overvloedodig of schaars gedekte tafel voor vogels? Symposium Waddenonderzoek Uitagave van Oecologisch Onderzoek, Arnhem.\n\nKing, J.R. and Farmer, D.S. (1961). Energy metabolism, thermoregulation and body temperature. In Marshall, A.J. (edit.) Biology and Comparative Physiology of Birds, Vol. II (Academic Press: London).\n\nMelville, D.S. (1978). Notes on food requirements of some birds at Mai Po. Notes privately circulated.\n\nOdum, E.P. (1971). Fundamentals of Ecology, 3rd Ed. (Saunders: Philadelphia)\n\nOdum, W.E. (1971). Pathways of energy flow in a south Florida estuary. Sea Grant Tech. Bull. No. 7, Univ. of Miami,\n\nOdum, W.E. & Heald, E.J. (1975). The detritus-based food web of an estuarine mangrove community. Estuarine Research I, 265-286.\n\nPark, D. (1975). A cellulolytic, pythiaceous fungus. Trans. Brit. mycol. Soc. 65, 249-257.\n\nPark, D. & McKee, W. (1978). Cellulolytic Pythium as a component of the river mycoflora. Trans. Brit. mycol. Soc. 77, 251-259.\n\nStewart, W.D.P. (1972). Estuarine and brackish waters an introduction. In Barnes, R.S.K. & Green, J. (ed.) The Estuarine Environment (Applied Science Publishers: London).\n\nVrijmoed, L.L.P. (1975). A study of lignicolous marine fungi in the coastal waters of Hong Kong. Univ. of Hong Kong: M.Phil. Thesis.",
        "txt_file_path": "txt/dfo323lmgvd/RAS-1984.txt",
        "external_url": "https://digitalrepository.lib.hku.hk/catalog/5h73wh572",
        "rank": 0
    }
]