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2 Folia Biologica

2 2003

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Behavioural response to an unsuitable host plant in the gypsy moth (Lymantria dispar L.)

100%

Lazarevic J. , Peric-Mataruga V. , Prolic Z. , Tucic N.

Folia Biologica

2003

tom 51

nr 1-2

129-131

To assess local differentiation in host preference, a two-choice test was performed on firstinstar gypsy moth larvae originating from an oak and locust-tree forest. More than 40 generations feeding on locust-tree leaves, rich in alkaloids, led to non-efficient discrimination of host leaves in larvae from a locust-tree forest. Possible causes of observed population differences are discussed in the present paper.

Changes in midgut and brain proteins in Morimus funereus larvae depending on nutritive substrate

63%

Ilijin L. , Jankovic-Tomanic M. , Mitic M. , Vlahovic M. , Lazarevic M. , Lazarevic J. , Peric-Mataruga V. , Prolic Z. , Nenadovic V.

Folia Biologica

2003

tom 51

nr 3-4

207-211

The response of Morimus funereus larvae to total starvation and refeeding with qualitatively different nutritive substrates (artificial diets supplemented with yeast as a source of B complex vitamins or with a digestibility reducer-tannic acid) was examined in this paper. Refeeding resulted in a compensatory increase of larval growth. Feeding and refeeding with qualitatively different nutritive substrates affected both quality and quantity of midgut and brain proteins. The observed differences suggest the possible switching of enzyme isoforms in M. funereus midgut and changes in synthesis/secretion of neurohormones, depending on food presence and its nutritional value.