Abstracts - faqs.org

Abstracts

Zoology and wildlife conservation

Search abstracts:
Abstracts » Zoology and wildlife conservation

The ecological cost of sex

Article Abstract:

A classical ecological model supplies a structure for understanding sex and asex as alternative strategies for reproductively isolated sub-populations that compete to consume a common resource. Applying classical population dynamics highlights how intraspecific competition can stop the invasion of an asexual mutant into a sexual population. Coexistence can take place immediately if the invading asexuals have a smaller inhibitory effect on the exploitative capacity of the sexuals than the sexuals have on themselves. The twofold cost of males to the growth capacity of the sexual population does not necessarily present a threat to the survival of the sexual strategy.

Author: Doncaster, C. Patrick, Pound, Graeme E., Cox, Simon J.
Publisher: Macmillan Publishing Ltd.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2000

User Contributions:

Comment about this article or add new information about this topic:

CAPTCHA


Sex and the male stick insect

Article Abstract:

Several unusual modes of reproduction, including androgenesis, were observed during the natural hybridization of two species of stick insect in Sicily. Androgenesis, or development without the female pronucleus, was not previously known to occur among animals. B. Mantovani and colleagues resorted to gel electrophoresis of alloenzymes and chromosomal analysis to examine the hybridogenetic strains produced by females of the species Bacillus rossius and males of the species Bacillus grandii. Behavioral or molecular signals are the best means of accounting for the stick insects' surprising reproduction.

Author: Giorgi, Piero P.
Publisher: Macmillan Publishing Ltd.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1992
Sexual behavior, Sexual behavior in animals, Animal sexual behavior, Phasmids (Insects)

User Contributions:

Comment about this article or add new information about this topic:

CAPTCHA


Widespread cloning in enchinoderm larvae

Article Abstract:

The authors discuss the study of asexual reproduction by free-living invertebrate larvae. They describe larval cloning in sea cucumber, sand dollar and sea urchin, and suggest that larval cloning is echinoderms' ancient ability.

Author: Palmer, A. Richard, Eaves, Alexandra A.
Publisher: Macmillan Publishing Ltd.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2003
Canada, Science & research, Physiological aspects, Genetic aspects, Cloning, Larvae, Echinodermata, Echinoderms

User Contributions:

Comment about this article or add new information about this topic:

CAPTCHA


Subjects list: Research, Reproduction (Biology), Reproduction, Reproduction, Asexual, Asexual reproduction
Similar abstracts:
  • Abstracts: Time to champion global data. Life and the rock cycle. Loophole for snowball Earth
  • Abstracts: Origin of life. Sex butterfly style. Let them eat grass!
  • Abstracts: The evolution of warning signals. Ins and outs of the ribosome. Genetic control and evolution of sexually dimorphic characters in Drosophila
  • Abstracts: Decompression-induced melting of ice IV and the liquid-liquid transition in water. Direct observation of molecular cooperativity near the glass transition
  • Abstracts: Pathogen-driven forest diversity. Fungi and the food of the gods. Soil pathogens and spatial patterns of seedling mortality in a temperate tree
This website is not affiliated with document authors or copyright owners. This page is provided for informational purposes only. Unintentional errors are possible.
Some parts © 2025 Advameg, Inc.