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| Korringa, P.. |
| Critical appraisal of the literature data on Mytilicola intestinalis, combined with personal experience in this field, led to formulation of answers on a series of questions re the ecology and distribution of the parasitic copepod Mytilicola intestinalis Steuer. It is confirmed that Mytilicola has been the causative agent in extensive mussel mortalities. The explosion of Mytilicola in several places on the coastlines of North Sea and Atlantic Ocean should be explained in terms of Mytilicola, being a new intruder in these waters. There is no ground for the view that a special set of ecological conditions saw to the explosive development of the autochthonous species Mytilicola intestinalis, normally existing in small numbers only. Mytilicola intestinalis has... |
| Tipo: Article / Letter to the editor |
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| Ano: 1968 |
URL: http://www.repository.naturalis.nl/record/504313 |
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| Korringa, P.. |
| It was on land that the need for conservation of nature was first felt. Setting aside of noteworthy areas for that purpose often led to a serious clash with other interests. Therefore the need was felt to formulate on a scientific basis which factors should be carefully considered in deciding which sections of the continents should be destined for nature conservation. It turned out that all these factors operate directly or indirectly in the interest of man himself, not for nature as such. An effort is made to study the applicability of all these factors in the marine environment. Comparison with the situation on land leads to the conclusion that the recreational value of the coral reefs in tropical areas requires above all measures for their protection,... |
| Tipo: Article / Letter to the editor |
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| Ano: 1977 |
URL: http://www.repository.naturalis.nl/record/504125 |
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| Korringa, P.. |
| Modern oyster culture began its development in the second part of the nineteenth century. Beginning in Europe it gradually spread over all the world’s oyster regions. Locally oyster cultural methods acquired a high degree of technical specialisation, recently even including chemical control of oyster diseases. A steadily increasing stream of scientific and technical papers, dealing with oyster biology and oyster culture, accompanied this development, and already numbers several thousands of publications. If closely related industries, such as cattle-breeding, horticulture, and agriculture, are compared with it, it is clear that one of the basic problems of oyster culture must be the oyster’s nutrition. Without a detailed knowledge of this subject it seems... |
| Tipo: Article / Letter to the editor |
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| Ano: 1949 |
URL: http://www.repository.naturalis.nl/record/504315 |
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