Fun Fact Friday: Thanatosis and Batesian Mimicry (Don’t Worry, We’ll Explain)

Happy Friday, everybody! It’s time for our next installment of Fun Fact Friday, with Arthur V. Evans’s latest book, Beetles of Eastern North America.

This week’s post is dedicated to (drumroll, please)…the art of playing dead.

8-13 Beetles

Did you know?

Thanatosis, or death feigning, is a behavioral strategy “employed by hide beetles (Trogidae), certain fungus-feeding darkling beetles (tenebrionidae), zopherids (Zopheridae), weevils (Curculionidae), and many others” to avoid becoming a predator’s dinner. When these beetles sense danger, they pull their legs and antennae up tightly against their bodies so that they look dead and lifeless to their enemies. These small predators lose interest in the hard, small, and unflinching beetles, and move on to their next target. Pretty cool, huh?

Batesian Mimicry is another tactic to keep from being eaten. In this case, beetles “mimic the appearance or behavior of stinging or distasteful insects,” as in the case of the flower-visiting Acmaeodera (Buprestidae), scarabs (Scarabaeidae), and longhorns (Cerambycidae). They all sport fuzzy bodies, bold colors and patterns, and behaviors to make them believable mimics of bees and wasps, and make quick and jerky movements to complete the staging. And believe you, me, neither animals nor humans want to be stung by bees – and so the predators retreat.

We hope you feel informed, and we’ll see you next Friday for another great Fun Fact!
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Arthur V. Evans is the author of:

Evans_Beetles Beetles of Eastern North America by Arthur V. Evans
Paperback | 2014 | $35.00 / £24.95 | ISBN: 9780691133041 | 560 pp. | 8 x 10 | 1,500+ color illus. 31 line illus. | eBook | ISBN: 9781400851829 | Reviews  Table of Contents  Preface[PDF]  Sample Entry[PDF]

Fun Fact Friday: Making Sense of Mandibles

Today’s fun fact for Beetles of Eastern North America by Arthur V. Evans takes an inside look at the stag beetle’s best accessory: his mandibles. Why do they have them? What do they use them for? Hold tight to find out!

Did you know? Photo Credit: Arthur V. Evans, Beetles of Eastern North America

The common name “stag beetle” refers to the large antlerlike mandibles found in some males, such as the giant stag beetle Lucanus elaphus (See middle frame at right). Mandible size within a species is “directly proportionate to the size of the body and regulated by genetic and environmental factors.”

Why do they have them?
Males use these oversized mouthparts to fight with rival males over who gets to take the lady beetle to dinner. You can find these beetles in moist habitats where there are plenty of things dying, like  a swamp. An area with decomposing wood is the ideal hideaway for these critters, since they drink tree sap and flower nectar, and munch on decaying deciduous and coniferous wood. But that’s good new for us: no home damagers here!

Bonus Fact:
The Family Lucanidae supposedly got its name when Pliny the Elder noted that Nigidius (a scholar of the Late Roman Republic and a friend of Cicero) called the stag beetle lucanus after the Italian region of Lucania, where they were turned into amulets for children. The scientific name of Lucanus cervus is the former word, plus cervus, deer.

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Arthur V. Evans is the author of:

Evans_Beetles Beetles of Eastern North America by Arthur V. Evans
Paperback | 2014 | $35.00 / £24.95 | ISBN: 9780691133041 | 560 pp. | 8 x 10 | 1,500+ color illus. 31 line illus. | eBook | ISBN: 9781400851829 | Reviews  Table of Contents  Preface[PDF]  Sample Entry[PDF]

Princeton University Press at the Ecological Society of America annual meeting

If you’re heading to the Ecological Society of America annual meeting in Sacramento, CA August 10th-15th, come visit us at booth 303!

Louis Gross, co-author of Mathematics for the Life Sciences, will be speaking in the demo area of the exhibit hall at noon on Wednesday, August 13th. All are welcome to then join us at the booth that evening at 5:00 for wine, cheese, and a book signing!

The life sciences deal with a vast array of problems at different spatial, temporal, and organizational scales. The mathematics necessary to describe, model, and analyze these problems is similarly diverse, incorporating quantitative techniques that are rarely taught in standard undergraduate courses. This textbook provides an accessible introduction to these critical mathematical concepts, linking them to biological observation and theory while also presenting the computational tools needed to address problems not readily investigated using mathematics alone.

Follow us on Twitter @PrincetonUPress for updates on the meeting and new and forthcoming titles.

Also be sure to browse our biology catalog, which lists many books for sale at our booth:

See you in Sacramento!

Quick Questions for Richard Karban, author of How to Do Ecology: A Concise Handbook (Second Edition)

Richard KarbanDr. Richard Karban is a professor of entomology at the University of California, Davis. He is a recipient of the George Mercer Award, presented by the Ecological Society of America for outstanding research (1990) and was a 2010 Fellow in the American Association for the Advancement of Science.

Dr. Karban received a B.A. in Environmental Studies from Haverford College (1977) and completed his Ph.D. in Ecology at the University of Pennsylvania (1982). He is the recipient of nearly a dozen research grants, whose focuses range from population regulation to plant resistance of insects and pathogens. He is the author of How to Do Ecology: A Concise Handbook (Second Edition).

Now, on to the questions!

PUP: What inspired you to get into your field?

Richard Karban: I grew up in an ugly and dangerous neighborhood in New York City. Natural history and natural areas were highly romanticized in my mind. Being an ecologist seemed like an exciting way to escape this life.

What is the book’s most important contribution?

Doing ecological research successfully requires a considerable amount of insider knowledge. We don’t teach these tips in academic classes. This book attempts to provide a simple set of guidelines for navigating the process of generating hypotheses, testing them, analyzing your results, and communicating with an interested audience. In my opinion, this is what we should be teaching ecology students, but aren’t.


“Indeed, confidence and persistence are the most important attributes that separate successful projects from failures.”


What was the biggest challenge with bringing this book to life?

The biggest challenge getting this book to happen was not allowing myself to get discouraged. I teach a graduate-level course in which each student develops an independent field project. The book started as a series of handouts that I gave my students. Each year, I revised my pile of materials. After a decade or so of revisions, I submitted a manuscript but was told that it was too short and lacked interesting visuals and other tools that would make the material accessible. Okay, so much for that, although I continued to add and tweak the content for my class. My wife, Mikaela Huntzinger, read what I had and convinced me that it would be useful to students; she also volunteered to add figures and boxes. Most of all, she encouraged me not to give up on the thing. Indeed, confidence and persistence are the most important attributes that separate successful projects from failures.

Why did you write this book?

I had a terrible time in grad school. I didn’t attend a large research university as an undergrad and I arrived with little sense of how to do research or thrive in an environment that valued research, publications, and grants above all else. Figuring out the culture was a painful process of trial and error. My experiences made me acutely aware of the “game” and made me want to share what I had learned to spare others the same pain.

Who is the main audience?

This book is intended primarily for young ecologists who can use some help posing interesting questions, answering them, and communicating what they find. Undergrads who want to do research and grad students doing a thesis are the two populations who will find the book most useful, although we hope that our colleagues will also get something from it.

How did you come up with the title and cover?

The title is a little presumptuous, but also conveys what we hope to provide in a few clear words – perfect.

The cover reflects my long-standing interest in streams that cut gently through landscapes. The first edition had a photo taken by my collaborator, Kaori Shiojiri, at our field site along Sagehen Creek. This edition features an abstraction of that image that I painted. If we write future editions, they will have further abstractions of that same theme done as a mosaic (Mikaela’s favorite medium) or as a stained glass (one of Ian’s).

Check out Chapter 1 of the book, here.

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Richard Karban is the author of:

6-6 Ecology How to Do Ecology: A Concise Handbook (Second Edition) by Richard Karban, Mikaela Huntzinger, & Ian S. Pearse
Paperback | May 2014 | $24.95 / £16.95 | ISBN: 9780691161761
200 pp. | 5 x 8 | 8 line illus. | eBook | ISBN: 9781400851263 |   Reviews Table of Contents Chapter 1[PDF]

Two for Tuesday – Britain’s Freshwater Fishes & England’s Rare Mosses

From our WildGuides selection, we are introducing two new beautifully illustrated books for your personal library.

j9973Britain’s Freshwater Fishes
by Mark Everard

Britain hosts a diversity of freshwater environments, from torrential hill streams and lowland rivers to lakes, reservoirs, ponds, canals, ditches, and upper reaches of estuaries. Britain’s Freshwater Fishes covers the 53 species of freshwater and brackish water fishes that are native or have been introduced and become naturalized. This beautifully illustrated guide features high-quality in-the-water or on-the-bank photographs throughout. Detailed species accounts describe the key identification features and provide information on status, size and weight, habitat, ecology, and conservation. Written in an accessible style, the book also contains introductory sections on fish biology, fish habitats, how to identify fishes, and conservation and legislation.

 

 

 

j9975England’s Rare Mosses and Liverworts:
Their History, Ecology, and Conservation
by Ron D. Porley

This is the first book to cover England’s rare and threatened mosses and liverworts, collectively known as bryophytes. As a group, they are the most ancient land plants and occupy a unique position in the colonization of the Earth by plant life. However, many are at risk from habitat loss, pollution, climate change, and other factors. Britain is one of the world’s best bryologically recorded areas, yet its mosses and liverworts are not well known outside a small band of experts. This has meant that conservation action has tended to lag behind that of more charismatic groups such as birds and mammals. Of the 918 different types of bryophyte in England, 87 are on the British Red List and are regarded as threatened under the strict criteria of the International Union for the Conservation of Nature.

This book aims to raise awareness by providing stunning photographs–many never before published–of each threatened species, as well as up-to-date profiles of 84 of them, including status, distribution, history, and conservation measures. The book looks at what bryophytes are, why they are important and useful, and what makes them rare; it also examines threats, extinctions, ex situ conservation techniques, legislation, and the impact of the 1992 Convention on Biological Diversity.

For more selections from WildGuides, please visit:
http://press.princeton.edu/wildguides/

Toby Tyrrell, author of On Gaia, explains how he came to question the Gaia Hypothesis

We interviewed Toby Tyrrell about his new book “On Gaia” last week. This week, we’re proud to link to this article in which he details some of the research that led him to view the Gaia Hypothesis with a critical eye:

Nitrogen is exceptionally abundant in the environment, it makes up 78 per cent of air, as dinitrogen (N2). N2 is also much more plentiful in seawater than other dissolved forms of nitrogen. The problem is that only organisms possessing the enzyme nitrogenase (organisms known as nitrogen-fixers) can actually use N2, and there aren’t very many of them. This is obviously a less than ideal arrangement for most living things. It is also unnecessary. Nitrogen starvation wouldn’t happen if just a small fraction of the nitrogen locked up in N2 was available in other forms that can be used by all organisms; yet biological processes taking place in the sea keep nearly all that nitrogen as N2. If you think about what is best for life on Earth and what that life can theoretically accomplish, nitrogen starvation is wholly preventable.

This realisation led me to wonder what other aspects of the Earth environment might be less than perfect for life. What about temperature? We know that ice forming inside cells causes them to burst and that icy landscapes, although exquisite to the eye, are relatively devoid of life. We can also see that ice ages – the predominant climate state of the last few million years – are rather unfortunate for life as a whole. Much more land was covered by ice sheets, permafrost and tundra, all biologically impoverished habitats, during the ice ages, while the area of productive shelf seas was only about a quarter of what it is today. Global surveys of fossil pollen, leaves and other plant remains clearly show that vegetation and soil carbon more than doubled when the last ice age came to an end, primarily due to a great increase in the area covered by forests.

Although the cycle of ice ages and interglacials is beyond life’s control, the average temperature of our planet – and hence the coldness of the ice ages – is primarily determined by the amount of CO2 in the atmosphere. As this is potentially under biological control it looks like another example of a less than perfect outcome of the interactions between life on Earth and its environment.

Look further and you find still more examples. The scarcity of light at ground level in rainforests inhibits growth of all but the most shade-tolerant plants. There’s only really enough light for most plants at canopy height, often 20 to 40 metres up, or below temporary gaps in the canopy. The intensity of direct sunlight does not increase the higher you go, so having the bulk of photosynthesis taking place at such heights brings no great advantage to the forest as a whole. Rather the contrary, trees are forced to invest large amounts of resources in building tall enough trunks to have the chance of a place in the sun. This arrangement is hard to understand if you expect the environment to be arranged for biological convenience, but is easily understood as an outcome of plants competing for resources.

Source: “Not Quite Perfect”, Planet Earth Online: http://planetearth.nerc.ac.uk/features/story.aspx?id=1492&cookieConsent=A

 

Read a sample chapter from On Gaia: A Critical Investigation of the Relationship between Life and Earth [PDF].