Why Males Exist, An Inquiry into the Evolution of Sex by Fred Hapgood

By Fred Hapgood

1979, First version. e-book is New. dirt jacket is in first-class situation with a small repaired tear. similar day delivery.

Show description

Read Online or Download Why Males Exist, An Inquiry into the Evolution of Sex PDF

Best evolution books

At Home in the Universe: The Search for the Laws of Self-Organization and Complexity

An important clinical revolution has all started, a brand new paradigm that opponents Darwin's concept in significance. At its middle is the invention of the order that lies deep in the most complicated of platforms, from the foundation of existence, to the workings of big businesses, to the increase and fall of serious civilizations.

Galaxy Evolution in Groups and Clusters: A JENAM 2002 Workshop Porto, Portugal 3–5 September 2002

Galaxy teams and clusters supply first-class laboratories for learning galaxy homes in numerous environments and at diverse look-back occasions. specifically, the new detections of high-redshift cluster applicants, merely attainable with the present high-technology instrumentation, upload a brand new measurement to the matter.

Cordless Telecommunications in Europe: The Evolution of Personal Communications

The cellular telecommunications is experiencing give some thought to­ capable progress at the present and with the elevated site visitors capacities which those platforms supply and falling apparatus costs, it's anticipated to keep growing through the Nineties. Projections of apparatus charges point out that even transportable mobile handsets may possibly come in the achieve of many shoppers good prior to the top of the century.

Evolution and Genetics of Life Histories

This quantity is the results of a symposium entitled "Variation in lifestyles Histories: Genetics and Evolutionary techniques" subsidized through this system in Evolutionary Ecology and behaviour of the college of Iowa and held in Iowa urban on October thirteen and 14, 1980. brought on by means of a contemporary upsurge of curiosity within the evolution of existence histories, we selected this subject a result of visible organization among existence heritage qualities and Darwinian healthy­ ness.

Extra resources for Why Males Exist, An Inquiry into the Evolution of Sex

Sample text

What the female does is cerebral and might sound more impressive, but it is really the male that has to bum the calories. Why should the males do all this work when it is the females that stand to lose more from wasted matings? The \ answer, obviously, is that the females can afford to wait. While males run out of females before they run out of sex cells, females almost never run out of eggs before they run out of potential mates. Her eggs will be fertilized, if not now, th~n soon enough. scene, h: Will get around to her.

Sometimes the benefits of gender-switching might spring from the social circumstances, such as when there are many females in the area it is better to be a male. There are a great many invertebrates-sponges, parasites, mollusks- / 79 that have just this ability of assessing the social situation and choosing their gender accordingly. In one experiment, when the young of a certain marine snail (Crepiduia) were isolated in an aquarium, 30 percent in one sample and 10 percent of a second began making sperm.

MANY ISSUES HAVE TO BE SETTLED AS MATING UNFOLDS , AND , p~rt because it is such a departure from the ecological, physIOlogical, and social routines of everyday, the resolution of each one of these issues might demand a considerable amount of inconvenience, stress, and risk. Two such issues are time and place. Often all the members of both genders live scattered over the landscape; in other cases the females live in groups but the males forage elsewhere (sometimes because the females actively repel any male homing in on their territory outside of breeding season).

Download PDF sample

Rated 5.00 of 5 – based on 27 votes