Monarch coloration, milkweed toxins, and predation by birds

5 November 2020 | Author: Chip Taylor

This text is both a preamble and addendum to the "Monarch Fallout and A Predator Story" blog article posted recently by Brad Guhr of the Dyck Arboretum (republished below, with permission). PREAMBLE Predation by birds has been offered as the explanation for ...

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Why monarchs are an enzyme – Part 3

6 March 2020 | Author: Chip Taylor

Why monarchs are an enzyme - Part 1 Why monarchs are an enzyme - Part 2 In Part 2 of this tutorial on monarch demography, I dealt with realized fecundity and age to first reproduction with the promise that the next topic ...

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Why monarchs are an enzyme – Part 2

25 February 2020 | Author: Chip Taylor

See Why monarchs are an enzyme - Part 1 posted earlier this month. What the heck is realized fecundity/fertility and why is it important? A term I mention from time to time in my talks is realized fecundity. Add to that, I ...

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Why monarchs are an enzyme – Part 1

10 February 2020 | Author: Chip Taylor

Monarchs are an enzyme or rather a complex set of enzymes that interact with the physical environment in a deterministic manner. In this article, I’m going to argue that the responses of monarchs to physical conditions are determined by their ...

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2018 Monarch Calendar Project

10 March 2018 | Author: Jim

NOTE: We will send an email with a link to the actual submission form after each period comes to a close (June 20th for period 1 and September 25th for period 2). Please hang onto any data sheets you have ...

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New Monarch Watch Citizen Scientist Project

31 March 2017 | Author: Jim

Monarch Watch is seeking the immediate assistance of hundreds of monarch enthusiasts (citizen scientists) in collecting observations of monarchs in their area during the spring and fall. This project is an attempt to assemble quantitative data on monarch numbers at ...

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Monarch Caterpillar Dorsal Aorta (video)

29 March 2011 | Author: Chip Taylor

serendipity [ser-uhn-dip-i-tee] -noun. 1. an aptitude for making unexpected and fortunate discoveries Occasionally, there is a little serendipity in the lab. One Friday, a few weeks ago, I noticed an unusual larva, a fourth instar of a "black" larval mutation we are ...

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Mead’s Milkweed and Monarchs

20 January 2011 | Author: Chip Taylor

From time to time the question arises as to whether monarchs can and do use all species of milkweeds in the genus Asclepias or whether there are some that are too toxic or have so much latex that larvae are ...

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Black Dots on Monarch Pupae

12 August 2009 | Author: Jim Lovett

Ann made an interesting observation in the lab this week concerning the black dots that appear close to the cremaster on a monarch pupa. The cremaster is the black "stalk" that attaches to the silk pad spun by the caterpillar ...

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