A~tract--1. Three common species of North Atlantic krill, Meganyctiphanes norvegica (M. Sars), Thysanoessa inermis (Kroyer) and T. raschii (M. Sars), have been stored at 0°C post mortem, and the lipolytic activity followed by measuring changes in the lipid composition during storage. 2. Both phosphoglycerides and triacylglycerols were subjected to extensive hydrolysis with the formation of free...

BACKGROUND AND AIMS Active growth in post-embryonic sporophytes of desert mosses is restricted to the cooler, wetter months. However, most desert mosses have perennial gametophytes. It is hypothesized that these life history patterns are due, in part, to a reduced desiccation tolerance for sporophytes relative to gametophytes. METHODS Gametophytes with attached post-embryonic sporophytes of T...

The effect of Sanguinicola inermis on serum antibody and complement activity in Cyprinus carpio was assessed using an ELISA and haemolytic assays. Possible immune evasion strategies were assessed using immunodetection of host proteins on the surface of the parasite. Carp acclimatized to 20 or 25 degrees C were infected by exposure to 500 cercariae or injected intraperitoneally with 150 cercaria...

Ethanolic leaf extracts of 5 medicinal plants traditionally used in medicine were studied for their antimicrobial activity against antibiotic-susceptible and resistant Staphylococcus aureus strains isolated from different clinical samples. The antimicrobial activity of plant extracts was determined by using agar well diffusion method. The plant extracts showed varied levels of antimicrobial act...

The present work studied the protective effect of Opuntia ficus indica f. inermis fruit juice (OFIJ) against ethanol-induced renal dysfunction in rats. Chronic ethanol administration (3 g/kg b.w) during 12 weeks to Wistar rats, significantly (p < 0.01) increased the serum and kidney malondialdehyde (MDA), the serum contents of urea, creatinine, gamma glutamyl transferase (GGT) and the urinary g...

We report the results of an 8-yr trap nesting study on the reproductive behavior of twocleptoparasitebees,Coelioxys funerariaSmith andCoelioxysmoestaCresson.This studyprovided a unique opportunity to examine parasite-host adaptation within a species, in which two different size classes ofC. funerariaconsistently laid eggs in thenests of the twodifferent sizedMegachilehosts, M. relativa Cresson ...

Relief of iron (Fe) limitation in the surface Southern Ocean has been suggested as one driver of the regular glacial-interglacial cycles in atmospheric carbon dioxide (CO2). The proposed cause is enhanced deposition of Fe-bearing atmospheric dust to the oceans during glacial intervals, with consequent effects on export production and the carbon cycle. However, understanding the role of enhanced...