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Summary The stocks of shrimps Parapenaeopsis stylifera and Metapenaeus dobsoni in the fishery of two areas of Kerala coast in India have been studied using length frequency data. The average annual stocks of the two species have been indicated. The present status of fishery shows a differential...
Summary Errors in estimates of year class strength and mortality among 0‐group plaice can result from migrations. In order to reliably determine the number present, tidal flats and channels in a large and clearly delimited Wadden Sea area (715 km2) were sampled simultaneously using different...
Summary Growth of Boops hoops Linnaeus, 1758 (Pisces, Sparidae) in the golf of Lion The authors give the equations age‐length, age‐mass and mass‐length of Boops boops living in the golf of Lion. Age has been determined by scalimetry. This study has shown that there is no difference between males...
Summary The humoral immune response of trout to Egtved virus (VHS) was examined by means of a 50 % plaque neutralization test with complement addition. The test, wich has been adapted for use in microtitre plates, is documented with regard to specificity and sensitivity. Eight weeks after VHS...
Summary In elvers (Anguilla anguilla) imported yearly to a fish farm in Hungary the regular occurrence of a Myxobolus infection was recorded. The parasite produces oval or spherical plasmodia of 0.1–0.2·0.07–0.12mm in the subcutaneous and intermuscular connective tissue of the head. In each...
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