Abstract
Food consumption and utilization were measured inGeocoris punctipes (Say) from 1st instar nymphs to adults that were fed eggs ofHeliothis virescens (Fabricius). Growth in both sexes was similar until the final portion of the last nymphal period, when female growth rose sharply over that of males. Food absorption efficiency was 95.2%; growth efficiency (ratio of weight ingested) was 52.9%, and metabolic efficiency was 55.6%. RQ was 0.93, and oxygen consumption rates were 0.84, 1.37, and 1.80 μl O2 mg body weight h−1 at 24°C, 30°C and 35°C, respectively. Q10 for O2 consumption was 2.14 (25–35°C).
Résumé
La consommation et l'utilisation des aliments ont été évaluées chezGeocoris punctipes (Say) nourri d'œufs deHeliothis virescens (Fabricius) dequis le premier stade de nymphose jusqu'à l'insecte adulte. La croissance chez les 2 sexes s'est avérée similaire jusqu'à la dernière période de la nymphose où la croissance des femelles a brusquement dépassé celle des mâles. Le taux d'absorption des aliments a été évalué à 95.2% tandis que celui de croissance était de 56%. Le coefficient respiratoire était de 0.93 et le taux de consommation d'oxygène de 0.84, 1.37 et 1.80 μl O2/mg de poids corporel et par heure à 24°C, 30°C, et 35°C respectivement. Le Q10 pour la consommation de l'oxygène était de 2.14 (25–35°C).
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Cohen, A.C. Food consumption, food utilization, and metabolic rates ofGeocoris punctipes [Het.: Lygaeidae] fedHeliothis virescens [Lep.: Noctuidae] eggs. Entomophaga 29, 361–367 (1984). https://doi.org/10.1007/BF02372157
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DOI: https://doi.org/10.1007/BF02372157