Das Wanderverhalten des Kabeljau der Deutschen Bucht
Lamp, F. (1973). Das Wanderverhalten des Kabeljau der Deutschen Bucht. Arch. Fisch. Wiss. 24(1-3): 155-169
In: Archiv für Fischereiwissenschaft. Fischer: Stuttgart. ISSN 0003-9063, more
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| Abstract |
In autumn of the years 1967 to 1971 five tagging experiments have been carried out in the eastern part of the German Bight. The majority of altogether 2451 released fish, partly tagged with spaghetti tags, partly with disks of soft plastic, belonged to the age group I. Only a few fish left the tagging places before the end of December. In tbc beginning of tbc spawning season a migration starts towards the spawning places in the E English Channel. In the following months a considerable part of the stock is scattered over large parts of the eastern North Sea. The year classes 1968 and 1970 showed a maximum, the year class 1969 a minimum of dispersion. Towards the end of the year the remaining stock, reduced by losses from migration and fishery, reassembled again in the German Bight. Here it met the age group I, which was also concentrated in this region before it was exploited for the first time for human consumption. This age group I had entered the east and north Frisian Wadden region from the West during the summer of the preceding year as 0-group. Until 31 September, 1972, 931 = 38% returns of the tagged fish were registered. The return rates of the five experiments varied between 27.3% and 59.1 %. |
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