The effect of food composition on ingestion, development, and survival of a harpacticoid copepod, Tisbe cucumariae Humes

摘要: Feeding experiments were carried out on the benthic harpacticoid copepod Tisbe cucumariue Humes, using seven different diets of various dried and ground macroalgae marsh grass, algal Aufwuchs, diatoms, polychaete meat, cereal. In short-term (1 h), i4C-labelled foods used to measure ingestion rate non-ovigerous adult females (individual dry wt = 5.57 f 2.49 fig). No significant difference was found among rates at which all foods, except ingested (12.7to 17.3x 10-2~gdrywt~ind-i~h~' Pol h t ). yc ae e meat consumed faster (23.9 x 10e2 ng ind - ' . '). The nutritional value estimated in long-term (22 days) by measuring development time survival T. cucumariae. Both these variables significantly correlated with nitrogen, protein content, C :N ratio foods. relation found, however, amount carbon, calories available diets. Thus, nitrogen (protein) content food factor limiting secondary production copepods.