نتایج جستجو برای: overwintering
تعداد نتایج: 1934 فیلتر نتایج به سال:
Differential thermal analysis and nuclear magnetic resonance spectroscopy experiments on whole flower buds and excised floral primordia of azalea (Rhododendron kosterianum, Schneid.) proved that supercooling is the mode of freezing resistance (avoidance) of azalea flower primordia. Increase in the linewidth of nuclear magnetic resonance spectra for water upon thawing supports the view that inju...
The super cooling point (SCP) is the best documented parameter for describing the ability of insects to survive freezing but its value as a predictor of overwintering survival or for estimation of the cold hardiness potential, is limited. According to this study, the SCP is influenced by such factors as polyol and protein concentration in the hemolymph; therefore it can be lower in winter than ...
Insects are highly successful animals inhabiting marine, freshwater and terrestrial habitats from the equator to the poles. As a group, insects have limited ability to regulate their body temperature and have thus required a range of strategies to support life in thermally stressful environments, including behavioural avoidance through migration and seasonal changes in cold tolerance. With resp...
Liriomyza sativae Blanchard and trifolii (Burgess) are two highly polyphagous pests that successively invaded China in the 1990s 2000s, respectively, threatening vegetable horticultural plants. Competitive displacement of L. by occurred during expansion process latter southern China, while whether can expand their range to northern remains unclear. Overwintering cold tolerance capacity largely ...
To determine whether transplacental transmission could explain overwintering of bluetongue virus in the United Kingdom, we studied calves born to dams naturally infected during pregnancy in 2007-08. Approximately 33% were infected transplacentally; some had compromised health. In all infected calves, viral load decreased after birth; no evidence of persistent infection was found.
There is recent concern over the status of many Neotropical migrant bird populations. Reports of declining numbers and the continuing loss and degradation of breeding and overwintering habitats have prompted an upsurge of interest in the conservation biology of these birds (review papers in Hagan and Johnston 1992). Fragmentation of the breeding habitat in North America often is cited as one of...
We report the draft genome sequence of Commensalibacter papalotli strain MX01, isolated from the intestines of an overwintering monarch butterfly. The 2,332,652-bp AT-biased genome of C. papalotli MX01 is the smallest genome for a member of the Acetobacteraceae family and provides the first evidence of plasmids in Commensalibacter.
Calanus finmarchicus C5 copepodites may be found in a range of body morphologies from small, lipid-poor (‘‘thin’’) individuals to larger, lipid-rich (‘‘fat’’) individuals, which are often differentiated by depth. In order to assess the physiological status of these animals, C5s collected from nearshore Gulf of Maine were visually sorted by these criteria and assayed for activity of four enzymes...
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