Haemolymph
Mostrando 25-28 de 28 artigos, teses e dissertações.
-
25. Lifetime allocation of juvenile and adult nutritional resources to egg production in a holometabolous insect.
In holometabolous insects reproductive success is strongly determined by the nutritional resources available to the females. In addition to nutrients derived from adult feeding, resources for egg production may come from the limited reserves accumulated during the larval stages. The pattern of allocation of these larval reserves to egg production is expected
-
26. Differential control of yolk protein gene expression in fat bodies and gonads by the sex-determining gene tra-2 of Drosophila.
We studied the regulation of the yolk protein (YP) genes in the somatic cells of the gonads, using temperature sensitive mutations (tra-2ts) of transformer-2, a gene required for female sexual differentiation. XX;tra-2ts mutant animals were raised at the permissive temperature so that they developed as females and were then shifted to the restrictive male-de
-
27. Drosophila fibronectin: a protein that shares properties similar to those of its mammalian homologue.
This is the first report on the existence in Drosophila of a protein with properties similar to those of vertebrate fibronectin that we shall refer to as Drosophila fibronectin. Rabbit antibodies against human plasma fibronectin have allowed the detection of this molecule in Drosophila haemolymph; common epitopes are shared by the two proteins. Drosophila fi
-
28. Decision rules, energy metabolism and vigour of hermit-crab fights.
Aggressive interactions between animals are often settled by the use of repeated signals that reduce the risk of injury from combat but are expected to be costly. The accumulation of lactic acid and the depletion of energy stores may constrain activity rates during and after fights and thus represent significant costs of signalling. We tested this by analysi