There is a growing list of marine invertebrate herbivores known to restrict their host choices to a subset of available species, yet the relative importance of the evolutionary forces that select for specialized feeding habits remain unclear. One such specialist is the gammaridean amphipod Peramphithoe tea (F. Ampithoidae) that restricts its distribution to the brown laminarian seaweed Egregia ...

While biotrophic fungal pathogens have generally been considered to have negative effects on phytophagous insects sharing the same host plant, very little is known about whether fungal infection may affect the dynamics of natural insect populations. This study was designed to determine the effects of fungal infection by Podosphaera plantaginis, a powdery mildew, of a shared host plant, Plantago...

Knowledge about how parasites choose their hosts is scarce and incomplete. Recent work has primarily focused on host health (i.e. immunocompetence) whereas ecological factors have been largely neglected. Here we investigate whether the immunocompetence, the nutritional condition or body size of nestling European bee-eaters Merops apiaster are used as parameters for habitat choice of the haemato...

a two-year laboratory study on the biology (including self-fertilization) of bulinus truncatus, the intermediate host of schistosoma haematobium, s. bovis and paramphistomum microbotrium in iran, has revealed information on the longevity, reproduction, hatchability rate, hatching time during various months of the year, and growth and mortality rates of this snail. it was found that the reproduc...

a r t i c l e i n f o Keywords: Foreign direct investment Cultural distance Hofstede Schwartz GLOBE project Political risk Wholly owned subsidiary Joint venture Most empirical research on the choice between joint ventures and wholly owned subsidiaries analyzes the role of cultural distance in an isolated way. This study explores the potential influence of some factors related to the diversity a...

Host preference and development biology of Bemisia tabaci (Gennadius) on brinjal, soybean, cucumber, cotton, tomato Solanum nigrum L. was studied during 2020-21 at PAU, Ludhiana. Under free choice test conditions, cucumber the most preferred host which attracted maximum number adults followed by soybean. The other plants in decreasing order were cotton > brinjal S.nigrum. Brinjal suitable ho...