Download PDF by Gilbert Waldbauer: A walk around the pond: insects in and over the water

By Gilbert Waldbauer

ISBN-10: 0674022114

ISBN-13: 9780674022119

ISBN-10: 0674027655

ISBN-13: 9780674027657

A water strider darts throughout a pond, its ft dimpling the outside rigidity; an immense water computer virus dives less than, wearing his mate’s eggs on his again; hidden between plant roots at the silty backside, a dragonfly larva stalks unwary minnows. slightly skimming the outside, within the air above the pond, swarm mayflies with diaphanous wings. Take this stroll round the pond with Gilbert Waldbauer and become aware of the main amazingly assorted population of the freshwater global. In his hallmark companionable kind, Waldbauer introduces us to the aquatic bugs that experience colonized ponds, lakes, streams, and rivers, particularly these in North the United States. alongside the best way we know about the various varieties those arthropods take, in addition to their striking modes of life—how they've got radiated into each possible area of interest within the water surroundings, and the way they focus on the demanding situations such an atmosphere poses to respiratory, imaginative and prescient, thermoregulation, and replica. We stumble upon the caddis fly larva development its protecting case and camouflaging it with move detritus; eco-friendly darner dragonflies mating midair in an acrobatic wheel formation; ants that experience tailored to the tiny water atmosphere inside a tumbler plant; and bugs whose diversifications to the aquatic way of life are furnishing biomaterials engineers with principles for destiny functions in and shopper items. whereas studying in regards to the evolution, traditional historical past, and ecology of those bugs, readers additionally notice greater than a bit in regards to the scientists who research them. (20060630)

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Extra info for A walk around the pond: insects in and over the water

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Thomas Brock and Louise Brock watched adult shore flies go under water in a bubble of air to feed on algae. The bubble keeps the fly dry and probably also insulates it from water hotter than it can tolerate. A tiny mite parasitizes the adult flies and eats their eggs. As soon as the mites hatch from the egg, they station themselves on the mat and jump onto passing adult flies and, as Norman Fashing told me, they probably feed by sucking the flies’ body fluids. After the molt to its next stage, the mite becomes a predator that wanders over the algal mat eating shore fly eggs.

Female salt marsh mosquitoes, William Horsfall reported, will feed avidly on any available animal including humans, often people sunning and swimming at nearby beaches. The bite of a mosquito is in itself not always immediately painful, but, as we have all found to our discomfort, the site of the bite soon swells and becomes painful and itchy, a response to an anticlotting agent that the mosquito injects into its victim. William Downes and I learned how horrible an encounter with salt marsh mosquitoes can be while collecting insects in Texas in 1960.

Females mate only once, immediately lay a jelly-like mass of eggs, and die shortly thereafter. Clunio can synchronize its life cycle with the spring tides only because it can “predict” when they will occur. This is made possible by an “internal clock” that counts off about 2 weeks, the interval between spring tides. Another clock counts off the hours, and at the right moment triggers all individuals to emerge from the pupa at almost precisely the same moment. Emerging with the crowd maximizes an individual’s chance of finding a mate and having offspring that will perpetuate his or her genes in future generations.

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A walk around the pond: insects in and over the water by Gilbert Waldbauer


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