Duration of food evacuation in herring, Clupea harengus L., and sprat, Sprattus sprattus (L.)

Duration of food evacuation in herring, Clupea harengus L., and sprat, Sprattus sprattus (L.)

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The fish, Hemp Wick which had fed under natural conditions, were kept in tanks and changes in stomach filling with time were observed.Linear relationships between filling and time at various temperatures and different initial filling are described.The relationships serve as a basis for multiple regression equations describing the relationship between food evacuation time and the two factors mentioned above.In the case borsa mare of herring, separate equations were calculated for mesoplanktonic and makroplanktonic-benthic food.