(1) Aside from the occasional curious swan, fish or dragonfly I’m alone for the duration of my 40-minute dip.
(2) These connectivity patterns indicate that the networks may synthesize patterns of activity needed for biological function; in this case, flight patterns carried out in the mesothoracic ganglion of the dragonfly.
(3) The chromosomes of the active previtellogenic oocytes of the dragonfly Cordulia aenea L. extrude into the cytoplasm a substance, which is subsequently found there in the form of granulofibrillar masses.
(4) A neuropeptide with adipokinetic activity in Locusta migratoria and hypertrehalosaemic activity in Periplaneta americana was purified by reversed-phase high performance liquid chromatography from the corpus cardiacum of the dragonfly, Libellula auripennis.
(5) The flight muscle preparations of the dragonfly Pantala flavescens and the aquatic beetle Cybister confusus showed extremely low levels of lactic dehydrogenase activity and high levels of alpha-glycerophosphate dehydrogenase (insoluble) activity.
(6) The larvae of dragonflies and scale insects revealed the highest activity (eliminated from 67 to 77% cercaria).
(7) Research on the transmission of Hemiurid Trematode Halipegus ovocaudatus in experimental and natural conditions demonstrates the following: --the miracidium grows into a sporocyst producing rediae in the Mollusc Planorbis planorbis; -- the cystophorous cercariae become mesocercariae in the hemocoele of Copepodes or finally Ostracodes when swallowed; -- the mesocercariae become matacercariae in the mesenteron of larval Odonates (Zygoptera and Anisoptera) when these larvae swallow the Crustacea; -- the metacercariae become become adults in the Amphibial Rana ridibundal perezi which feeds on dragonflies.
(8) Retinoids in the compound eyes of nymphs and adult dragonflies in 11 families of the 3 suborders were extracted by the oxime method, and analysed by high performance liquid chromatography.
(9) Differences in oxygen consumption attributable to apparent specific dynamic action (SDA) were measured in relation to feeding level in the dragonfly naiad Somatochlora cingulata exposed to low pH and sublethal aluminum concentration plus low pH.
(10) The apposition eyes of the corduliid dragonfly Hemicordulia tau are each divided by pigment colour, facet size and facet arrangement into three regions: dorsal, ventral, and a posterior larval strip.
(11) Cercariae penerate and encyst in dragonfly nymphs, Tramea sp., Libellula sp., Anax sp., and in damselfly nymphs, Enallagma spp.
(12) The mechanical action and innervation of the major flight muscles of dragonflies are described.
(13) The injection of low doses of bacteria into the aquatic larvae of dragonflies (Aeschna cyanea, Odonata, Paleoptera) induces the appearance in their hemolymph of a potent antibacterial activity.
(14) The ovaries consist of large number of panoistic ovarioles in the last instar nymph and the adult dragonfly Orthetrum chrysis (Selys).
(15) Simultaneous recordings from over 50 neural cells were obtained from the dragonfly ganglia.
(16) You may find bitterns making their basso profundo hoot, or you could see otters, dragonflies and adders.
(17) Experiments have been made on 4 dragonfly species -- Sympetrum vulgatum, S. flaveolum, S sanguineum, S. danae.
(18) It is assumed that high-frequency spatial filtering in dragonflies is provided by strong lateral inhibition in retinotopic projection.
(19) The behaviour of the dragonfly E. fatime was observed in the field in the Near East, in Turkey and on Rhodos in the summers of 1971 and 1973.
(20) However, the ventral area of the true dragonflies' compound eye which did not include the large ommatidia contained both retinals, and the 3-OH ratio was more than ten.