Larvae of Culiseta inornata (Williston) can survive and complete development in dilutions of sea water ranging from 50-700 mosmol kg-1. The larvae hyperregulate with regard to haemolymph osmotic concentration in dilute media (50-400 mosmol kg-1) and osmoconform when external salinities exceed 400 mosmol kg-1. This pattern of osmoregulation is distinct from that observed in freshwater and saline...

Insect Haemolymph, Hormone Binding Proteins, Juvenile Hormone, Photoaffinity Labelling, Manduca sexta, Locusta migratoria Juvenile hormone III, i.e. methyl 10,1 l-epoxy-3,7-dimethyl-2£’,6£'-dodecadienoate, was used for photoaffinity labelling of JH-binding proteins. Irradiation of haemolymph from Manduca sexta and Locusta migratoria in the presence of racemic [10-3H]JH-III results in covalent i...

Different physico-chemical properties of the haemolymph of various chilopod (Lithobius forficatus and Scolopendra cingulata) and diplopod species (Rhapidostreptus virgator, Chicobolus spec.) were investigated. Haemolypmph pH ranged from 7.0 to 8.5 being slightly more alkaline in the millipede species. Protein content and osmolarity was higher in chilopods (between 296 and 371 mOsm and 65 to 73 ...

A lectin detected in haemolymph from the Australian spiny lobster Panulirus cygnus agglutinated human ABO Group A cells to a higher titre than Group O or B. The lectin also agglutinated rat and sheep erythrocytes, with reactivity with rat erythrocytes strongly enhanced by treatment with the proteolytic enzyme papain, an observation consistent with reactivity via a glycolipid. The lectin, purifi...

The haemolymph total protein concentration and protein profile of C madrasensis exposed to different salinities were studied. The animals were maintained at salinities 6 ,12,24 and 36 ppt for one month. The serum total protein concentration showed significant reduction at 6 and 36 ppt. The haemolymph protein profile obtained by SDS-PAGE also varied with difference in salinities. There were four...

Contact-rehydration in terrestrial slugs involves a specific drinking behaviour during which water is rapidly absorbed through the integument of the foot. When dehydrated slugs were placed on wet filter paper containing 14C-inulin, they displayed the characteristic drinking posture and absorbed both water and 14C-inulin. Samples of haemolymph from dehydrated slugs after 12 min of contact-rehydr...

Drosophila harbours a simple tubular heart that ensures haemolymph circulation within the body. The heart is built by a few different cell types, including cardiomyocytes that define the luminal heart channel and ostia cells that constitute openings in the heart wall allowing haemolymph to enter the heart chamber. Regulation of flow directionality within a tube, such as blood flow in arteries o...

The haemolymph of the crayfish Austropotamobius pallipes exhibits a high affinity for oxygen (P50 = 2-7 Torr at pH7-9 and 15°C) and a modest Bohr effect (<p = —0-455). The affinity of haemolymph dialysed against a crayfish Ringer was lower with a P50 value of 6 4 Torr at the same temperature and pH. The oxygen affinity of the dialysed haemolymph can be increased markedly by increased concentrat...

Farming of the flat oyster Ostrea edulis in Europe is severely constrained by the protozoan Bonamia ostreae. The introduction of the resistant species Crassostrea gigas has been a relief for the farmers, while the pilot programmes to select O. edulis strains resistant to bonamiosis performed in various countries can be seen as a promising strategy to minimise the effects of bonamiosis. However,...

Summary Control of white grubs, the sporadic root-feeding larvae scarabid beetles, is difficult due to their cryptic nature and resistance chemical insecticides. Potential exists for use entomopathogenic nematodes (EPN) such control. The successful infection grubs by EPN, however, limited grubs’ innate reduced susceptibility in form behavioural, morphological physiological defences. This study ...