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... Science Frontiers ONLINE No. 54: Nov-Dec 1987 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects The insects' revenge Plants may fool some insects with their mimicry and deter others with toxic chemicals, but the insects have their tricks, too, as seen in the following item from Science: "Many mandibulate insects that feed on milkweeds, or other latex-producing plants, cut leaf veins before feeding distal to the cuts. Vein cutting blocks latex flow to intended feeding sites and can be viewed as an insect counteradaptation to the plants' defensive secretion." (Dussord, David E., and Eisner, Thomas; "Vein-Cutting Behavior: Insect Counterploy to the Latex Defense of Plants," Science, 237:898 ... 1987.) Comment. Right now, even as we write this, the plants are evolving counterploys -- high-voltage veins perhaps! But this may not work. See the final item in this section. From Science Frontiers #54, NOV-DEC 1987 . 1987-2000 William R. Corliss ...
Terms matched: 2 - Score: 243 - 15 May 2017 - URL: /sf054/sf054b10.htm
... Science Frontiers ONLINE No. 85: Jan-Feb 1993 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Singing Caterpillars Actually, the singing caterpillars are not particularly tuneful. They really generate a vibration that is transmitted through the material they are resting on. You and I cannot hear caterpillar songs, but some ants can, and they are attracted to these insect sirens. The singing caterpillars belong to the Lycaenidae, which include such butterflies as the hairstreaks and blues. It is not only the singing or vibrating of this group of caterpillars that makes them remarkable, it is the complexity of their symbiotic relationships with several species of ants and a plant. Since both the ants and the caterpillars favor the Croton plant, they could well meet by chance, ... menage-a -trois! They get both leaves and nectar from the plant for nothing. They do supply the ants with nectar in exchange for protection, but subtle subversion prevails here! First they attract the ants with their songs; then, they seduce them with nectar that is much more nutritious and attractive than that produced by the Croton plant. Finally, they chemically force the ants into defensive postures against predatory wasps by spraying them with a mesmerizing substance from special "tentacle organs" near their heads. Why is all this subversive on the part of the caterpillars? It appears that the caterpillars have invaded and undermined the normal ant-plant symbiosis -- a very common, mutually beneficial arrangement. The ants have been seduced into letting the caterpillars feast on the Croton plant, although ...
Terms matched: 2 - Score: 156 - 15 May 2017 - URL: /sf085/sf085b06.htm
... Science Frontiers ONLINE No. 42: Nov-Dec 1985 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Trees may not converse after all!Back in SF#27, we reported how some evidence suggested that trees might communicate with one another in connection with insect attacks. S. V. Fowler and J.H . Lawton contest this conclusion, and they have experimental evidence to back them up. Working with birch trees, they defoliated saplings 5% and 2s% and looked for signs of intertree communication. They found none. As for previous claims for this phenomenon, Fowler and Lawton believe that one study was statistically flawed, and the other due to an infectious disease transmitted between caterpillars rather then talking trees. (Fowler, Simon ... ., and Lawton, John H.; "Rapidly Induced Defense and Talking Trees: The Devil's Advocate Position, " American Naturalist, 126:181, 1985.) From Science Frontiers #42, NOV-DEC 1985 . 1985-2000 William R. Corliss ...
Terms matched: 2 - Score: 123 - 15 May 2017 - URL: /sf042/sf042p16.htm
... Insertion BMC CHEMICAL AND PHYSICAL PHENOMENA BMC1 Biochemicals That Challenge Evolution BMC2 Possible Lunar Effects on Mammalian Biochemistry BMC3 Some Biochemical Curiosities in Mammals BMC4 The Inability of Some Mammals to Synthesize Ascorbic Acid BMC5 Anomalies Observed in the Cytochromes-Percent-Sequence Difference Matrix BMC6 Miscellaneous Blood and Biochemical Differences among Mammals Urine of Female Dogs Kill Grass But Not Male's Convergence of Shark and Camel Protein Convergence of Elephant and Insect Pheromone BMD DISTRIBUTION OF MAMMALS IN SPACE AND TIME BMD1 Remarkable Congregations and Concentrations of Mammals BMD2 Apparent Dearths and Absences of Mammals BMD3 Cycles in Mammal Populations BMD4 Exotic Mammals BMD5 Geographically Separated Populations of Flightless Mammals BMD6 Sharp Zoogeographical Divisions Despite Minimal Barriers to Movement BMD7 Decrease in Biodiversity with Latitude BMD8 Preference for Certain Geological Formations BMD9 Entombed Mammals BMD10 Late Survival of Mammoths and Mastadons BMD11 Current or Very Recent ... (Hoop and Milk Snakes) Iguana Sociality Toad Handedness Death Feints Frog Cocoons Chicken-Eating Frogs Snake Maternal Impressions Decapitated Snakes Dangerous Flying Reptiles [BRA] "Vagabond" Female Green Turtles Tuataras Copulate Like Birds Horned Toads Squirt Blood Cannibalism in the Womb in Salamanders Snake Odor-Warfare Evolution of Instincts BRC BIOCHEMICAL PHENOMENA Snakes Produce Antivenins Effective against Many Different Venoms Newt and Toad Eggs Are Toxic Identical Chemical Defenses in Some Birds and Frogs Snake Venoms Vary with Geography Human and Crocodile Hemoglobins Very Similar Electrodynamic Fields in Reptiles Poison Frogs Get Their Poison from Their Prey Electrical Fields around Frog Eggs Remarkable Biochemical Reactions during Tadpole Metamorphosis BRD DISTRIBUTION IN SPACE AND TIME Amphibian Decline Worldwide Blind Cave Dwellers Mass Migrations and Concentrations Out-of-Place Snakes Out-of-Place Alligators and Crocodiles Loggerhead Missing-Year Phenomenon ...
Terms matched: 2 - Score: 114 - 15 May 2017 - URL: /cat-biol.htm
