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Discipline Specific Core Concepts is Ecological Core Concepts -- Populations -- Life history traits and reproduction
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View Resource A female rotifer (Brachionus calyciflorus) with two eggs

A female rotifer (Brachionus calyciflorus) with two eggs. The eggs are the result of parthenogenesis, or asexual reproduction by the female, which occurs in rotifers when growing conditions are...

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http://www.esajournals.org/doi/abs/10.1890/04-1400
View Resource A Galapagos sea lion (Zalophus wollebaeki) nurses a pup.

In mammals, lactation has important effects on maternal and offspring fitness. Pinnipeds (fin-footed mammals) are a good mammalian group for research studies that focus on lactation because in...

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http://www.esajournals.org/doi/abs/10.1890/04-0319
View Resource A periodical cicada (Magicicada sp.) molts on the side of a tree after emerging from underground.

A periodical cicada (left) has mostly freed itself from its old exoskeleton (right). The cicada's new exoskeleton is light in color and has not yet hardened. Every 13 or 17 years, periodical cicadas...

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View Resource Are males cheaper than females? Male and female costs of reproduction

In this TIEE experiment, students investigate the costs of reproduction. In dioecious plants, a female's investment in reproduction is typically much greater than a male's, because while both sexes...

http://tiee.esa.org/vol/v7/experiments/stehlik/abstract.html
View Resource Cemetery Demography

This laboratory exercise examines the changes in human demographic patterns by visiting a local cemetery, collecting data recorded on tombstones, and producing a graphical representation of...

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