Hungry hungry spiders

All these baby spiders hatched out over the last few days, and I had to start feeding them. I’ve got a lot of flies, I opened each vial one by one, and tossed in a surprised wingless fly. All the babies, even though they’re only two days old, had strung silken lines all over the place — baby’s first death trap! — and were waiting patiently, hanging upside down like the grown ups, and wow, were they ever excited when the first fly was snared!

Here’s a pair of Parasteatoda juveniles, literally seconds after I put a single fly in. They descended on it immediately. Baby’s first kill!

I’m about halfway through the feeding. It’s starting to go faster as I get better at manipulating massive numbers of flies. The Runestone line is all completely fed now, with the corpses of their twitching prey piling up. I think I’ll take a break and feed the remainder tomorrow.

SO MANY SPIDERS!

Yesterday, one Parasteatoda egg sac popped and sent out a cloud of baby spiders I was struggling to corral. Today, another hatch!

I’m going to be here in the lab for a while. I have to separate these out into individual vials and feed each of yesterday’s spiders. It’s hard work being the Mother of All Spiders. I hope I’ve got enough flies.

Sorted, sorta.

I estimate there are about 160 spiders in all those tubes. I couldn’t possibly put single individuals in each, I don’t have enough space — so there are two or three in each, with 8 or so in the larger cube-shaped containers. I found an efficient way to move them. I’d just hold the container with the whole clutch at a slight vertical angle, and the babies would make their way to the edge and leap off, rappelling downwards, and I’d lower them on their threads into a tube and brush the silk against the lip, and then cut them off with a sponge. It worked well enough that I had no accidents that I noticed, which in part accounts for the larger numbers here over the previous day’s catch.

These, by the way, are called the H line because I caught the mother and egg sac at the Horticulture Display Garden. Mom is fine, she’s in one of the containers, too.

Both of these clutches are from wild-caught spiders found outdoors, which troubles me a bit. I’ve definitely got to get at least one batch from indoor spiders — I’ve got some egg sacs like that right now, but I’ve had a very low success rate from their ilk. Maybe country spiders are more fecund than city spiders?

I can’t always muster the energy to read pseudoscience

If you’d like to get depressed about the state of scientific publishing, skim through this thread by Elisabeth Bik. It’s about someone named Alireza Sepehri who is publishing utter garbage in various journals, claiming that there are male and female flu viruses, cancers from men and women have opposite polarity, 5G radiation punches holes in nuclear membranes and viruses spontaneously generate in the cavities, etc., etc., etc.

I was briefly tempted to read one of these terrible articles, but was suddenly struck with a brief flash of wisdom and realized that I could determine the quality of the work with a brief glance at the abstracts or the figures, and dismiss them instantly.

Which makes me wonder…how much effort the “reviewers” put into critically reading the submitted papers. And now I’m wondering — maybe the reviewers for that journal are imaginary, and the journal should be shut down. And maybe, in my world of fantastical reasonableness, publishers couldn’t make bank churning out garbage journals like the Journal of Biological Regulators and Homeostatic Agents.

I’d say you can stop asking me these questions now, but I know they’ll continue

I’ve noticed that there are two kinds of responses people make when they learn I’m studying spiders. 1) They tell me about the terrible spider bites they’ve been getting lately, and 2) they ask if it’s true that people swallow thousands of spiders while sleeping in their lifetime. At least now I can cite this definitive response from Andrea Haberkern in answer to the first. Spiders have no interest in biting anyone!

Bite Post FAQs
1. Can anyone tell me what bit me?
Doctors nor entomologists nor arachnologists can ID bites from a bite alone in the majority of cases. There are likely a handful of exceptions, as in the case of some tick bites that have signs but overall this is not the case. So, if a someone tells you “it’s a spider bite” or “it’s a recluse bite” without seeing the animal itself do the biting, chances are it is something else entirely …but, more on that later…

2. What can we do about this bite?
First and foremost- this is a nature appreciation group, not a medical advice group. Medical advice is not allowed by any members. No members, to my knowledge, are medical doctors. If you or a loved one is suffering negative effects from a bite, please seek medical attention.

3. Do you think a spider bit me?
No. The reason for this is boils down to basic spider biology. I would venture to say that the vast majority of “spider bites” are something else entirely. I think many people believe that spiders go around biting sleeping people, falling from trees just to bite you or are sneaking around looking for their next tasty human to chomp on. I’m assuming the reason this is such a common misconception is likely due to a lack of understanding of what these animals are all about. So… spiders evolved venom to eat insects and other small prey. They use it to immobilize their prey. Just like it takes your body a tremendous amount of energy through food intake to conduct daily activities, it also costs spiders a lot of energy to produce this venom. Why would an animal that needs a substance to eat go around wasting it on mammals when it has nothing to gain for it? It wouldn’t. Now, I’m not saying spiders never bite. Any animal with a mouth can bite. If you grab a spider, I bet it will bite you- just like if you grab a squirrel it will bite you. But I don’t hear anyone saying squirrels are jumping into peoples’ beds while they sleep just to bite them. So why spiders? Spiders will bite in self-defense, but just to add to the unlikelihood of being bit by a spider- most species will do several other defense tactics before resorting to biting. These tactics include: fleeing, playing dead, threat displays, falling to the ground, kicking silk at you and, in some species, throwing poop at you. Biting is an absolute last resort, again because venom is energetically costly and its main purpose is to eat not defense, so you practically have to force a spider to bite you. Just to drive the point home even further- I would place money on the fact that I am likely one of the only people in here who has actually been bitten by a spider. But put that into perspective- I have to manhandle, harass and grab spiders, literally thousands of times, for my work…but even still- I’ve only been bitten a dozen or less times out of thousands of rough handling… I’ve deserved it every time. So, no, I don’t think a spider bit you. Even in cases where a spider was in the general vicinity… false blame is likely to blame.

4. So if a spider didn’t bite me what did?
There are literally hundreds if not thousands of other animals (and plants) that are more likely to have bit you or caused you skin irritations. These include anything that does either directly feed on us or uses bites/irritations as a defense. Examples of organisms that are a way more likely culprit for your skin issues include, but are not limited to: some midges, chiggers, mosquitoes, poison oak/poison ivy, horse flies, sand flies, fleas, stinging nettle, ticks, assassin bug defensive bites, conenose bugs, ant/bee/wasp stings and even some plant/fruit eating bugs that will take the occasional nibble.. etc. etc.

5. But but but I saw 2 puncture holes in my skin, it had to be a spider….
This is a myth. I think it comes from a common misunderstanding of spider mouthparts. Most people assume that all spider chelicerae (fangs) face downward like that of a tarantula and therefore cause 2 bite marks. This is not the case. Only the Mygalomorphs (tarantulas, trapdoor spiders and Aussie funnelwebs) have their mouthparts oriented like this. But seeing that tarantulas and kin are much larger spiders- I think you would physically see if one bit you. So, when someone says “I know this much smaller spider bit me even though I didn’t see the spider because I have 2 bite marks” … there several reasons why this is not the case. First, most spiders’ mouthparts are oriented to meet side to side not parallel facing downward (if the visual is too hard to imagine google image search “Mygalomorph versus Araneomorph mouthparts”) So, if one bit you, a single puncture would be more likely from where the 2 fangs meet. Next, if there were 2 bite marks in the skin caused by a spider- this would have to be a BIG spider for them to even be visible- I highly doubt a spider of that size is capable of sneaking in, biting you without you seeing it, then sneaking away in the night to leave you with only 2 little vampire marks as “proof”. Many many insects will bite multiple times in a localized manner, and considering how much more likely insects are to bite humans than spiders in the first place, that again is more likely your little biting friend.
Spiders rule,
-Andrea

As for the second question…no spider would blithely crawl into a large carnivore’s mouth. Do you also think hippopotamuses lounge about complaining about all the humans who wandered into their gullets while they were sleeping? No. The whole idea is nonsense, and I’d really like to know where that myth started. I’ve been surprised at how many people ask me if it’s true that people swallow 8 (or some other number) spiders a night, when only a moment’s thought would tell you it’s absurd.

P.S. I’ve never been bitten by a spider, but then I only work with little house spiders. They’ve also never leapt into my mouth.

I’m a proud papa!

I’ve been eagerly checking on my colony every day for the last week or two, because I was expecting a happy event. Tonight, it happened! The babies hatched out!

I expect you all to follow the the tradition and tell me how beautiful my baby is.

Well? I’m waiting!

There were somewhere upward of 80 babies that emerged today. This meant I had to immediately separate all of them into individual vials, or in many cases, 2 or 3 babies in a vial (I’ll separate them further later). I was just sitting there frantically plucking up spiders with a paintbrush and popping them into new vials, which was busy enough, but then…oops. I dropped the egg sac. I’m a klutz.

What happened next is that swarms of tiny, pin-head sized spiders were scurrying off to escape, usually taking flight on a thread of silk. So for about 20 minutes I was sitting there with a paintbrush in one hand and watchmaker forceps in the other, squinting into the air of the lab, my hands darting out to snag a nearly invisible strand of gossamer silk with a nearly microscopic dot of a baby spider on it.

I know some of them got away (sorry, lab neighbors — they’re tiny and cute, don’t worry) because even as I was putting everything away to go home I kept finding more strands hanging from my microscope, or from my computer, or from me. Who knows? I might have some on me right now.

I’ve got lots of baby spiders stuffed into my incubator now. Tomorrow I’ll give each one a fly, and I’ll start tracking their development and health.

Note the “R”. I’m calling this my Runestone line, because the mother (in the individual vial) and the egg sac were collected at Kensington Runestone park.

Now for a little dread: I’ve got 6 more egg sacs in the lab. I’m gonna need a bigger incubator and more tube racks.

More spiders! But only trustworthy spiders, please

There has been a pleasant change to my in-box. I’m used to getting hate-mail and gay porn, but nowadays I get a flood of spider mail. People are taking photos of the spiders they’re noticing around their house and sending them to me! Some of you might think that’s worse, but I’m thrilled! It means I’m getting through to people and helping them appreciate biology more, which is exactly what I want to do. The only problem right now is that I’m getting so many photos that I can’t acknowledge them all — sorry, but I do like them.

Although I do have to mention one problem. I was sent a link to this article about an interesting spider phenomenon, which reports that “climate change is making spiders more aggressive.” As someone getting more interested in spider behavior, and planning some potential student projects around that kind of stuff I’ll be able to do over the winter. However, the article is about a paper by Jonathan Pruitt, and I have to remind you all — Jonathan Pruitt has been under suspicion of having fabricated data, and multiple papers have been retracted.

It’s been a bad couple of weeks for behavioral ecologist Jonathan Pruitt—the holder of one of the prestigious Canada 150 Research Chairs—and it may get a lot worse. What began with questions about data in one of Pruitt’s papers has flared into a social media–fueled scandal in the small field of animal personality research, with dozens of papers on spiders and other invertebrates being scrutinized by scores of students, postdocs, and other co-authors for problematic data.

Already, two papers co-authored by Pruitt, now at McMaster University, have been retracted for data anomalies; Biology Letters is expected to expunge a third within days. And the more Pruitt’s co-authors look, the more potential data problems they find. All papers using data collected or curated by Pruitt, a highly productive researcher who specialized in social spiders, are coming under scrutiny and those in his field predict there will be many retractions. The furor has even earned a Twitter hashtag—#PruittData.

That guy is going to be tainting the field for years, and I can’t trust his work until it’s been replicated.

Grass spiders taking over

Today is the day I dread: I have to go into the lab and scrub fly bottles and do some general clean up. Responsibilities, yo. Shininess will ensue.

Also, we went on a mini-adventure last night, waiting until full darkness fell and then prowled around our house with a UV lamp and headlights. Unfortunately, I was disappointed — lots of active spiders, but they were all grass spiders. Grass spiders are all over the place, and they sort of take over every summer, but I just can’t get excited about them.

Check out the outside of your house — I bet you’ve got lots of funnel webs around with these shy guys hiding within them.

[Read more…]

This is a barroom conversation, not a publication

It must be awfully easy to get published in the Journal of the British Interplanetary Society. A couple of beers, some scratches on a cocktail napkin, and you get to call it research.

According to a research paper accepted for publication in the Journal of the British Interplanetary Society, extraterrestrials are sleeping while they wait. In the paper, authors from Oxford’s Future of Humanity Institute and the Astronomical Observatory of Belgrade Anders Sandberg, Stuart Armstrong, and Milan Cirkovic argue that the universe is too hot right now for advanced, digital civilizations to make the most efficient use of their resources. The solution: Sleep and wait for the universe to cool down, a process known as aestivating (like hibernation but sleeping until it’s colder).

Understanding the new hypothesis first requires wrapping your head around the idea that the universe’s most sophisticated life may elect to leave biology behind and live digitally. Having essentially uploaded their minds onto powerful computers, the civilizations choosing to do this could enhance their intellectual capacities or inhabit some of the harshest environments in the universe with ease.

OK, sure, yeah. Maybe. Why not? Evidence would be kind of nice to have, but hey, speculate away. They just guess that extraterrestrial life might be like my laptop, with a “sleep mode” that conserves battery power, just like a 19th century scientist might speculate that alien life is steam-powered and has periods where they cool the boilers and scrape the accumulated scale out of the pipes. Perfectly plausible. Take what you know and extrapolate it far off into the unknown, all while pretending you know exactly what you’re talking about.

The idea that life might transition toward a post-biological form of existence is gaining ground among experts. “It’s not something that is necessarily unavoidable, but it is highly likely,” Cirkovic told me in an interview.

Experts. How do you become an expert in alien species that have progressed so far beyond our known technologies? Especially when you’re willing to recognize that these hypothetical aliens would face challenges on such a cosmic scale that trying to imagine how they would cope with them is like stone age tribesmen trying to come up with an explanation for how to amplify a weak wi-fi signal to reach your deck.

The funny thing is, these guys don’t even believe their own theory.

Interestingly, neither Sandberg nor Cirkovic said they have much faith in finding anything. Sandberg, writing on his blog, states that he does not believe the hypothesis to be a likely one: “I personally think the likeliest reason we are not seeing aliens is not that they are aestivating.” He writes that he feels it’s more likely that “they do not exist or are very far away.”

Cirkovic concurred. “I don’t find it very likely, either,” he said in our interview. “I much prefer hypotheses that do not rely on assuming intentional decisions made by extraterrestrial societies. Any assumption is extremely speculative.” There could be forms of energy that we can’t even conceive of using now, he said—producing antimatter in bulk, tapping evaporating black holes, using dark matter. Any of this could change what we might expect to see from an advanced technical civilization.

Well then, why even propose it?

Yet, he said, the theory has a place. It’s important to cover as much ground as possible. You need to test a wide set of hypotheses one by one—falsifying them, pruning them—to get closer to the truth. “This is how science works. We need to have as many hypotheses and explanations for Fermi’s paradox as possible,” he said.

The important word there is TEST. Very good, smart guys. How do you propose to test it? I don’t mean that silly suggestion they made that we could send a space probe to the alien’s planet and poke the bear, since we won’t have the capability to do that in the foreseeable future, and even if we did, it seems incredibly stupid to propose to annoy some god-like aliens. Inventing empty hypotheses with no means to test them that are so improbable that you think simpler hypotheses are a better explanation is not “how science works”.

You can’t complain about spiders when ichneumonid wasps exist

There we were, innocently gamboling about Green River Park, looking for cute and charming little spiders, when I glance at a tree and…what is that shiny yellow&black evil-looking machine over there? It was an ichneumonid wasp with its long glistening ovipositor probing under the bark for plump grubs to parasitize with eggs.

Wicked. First one I’ve seen here.

OK, we did see one pretty little Philodromus. Cute. Not terrifying like she expects you to bow down and worship her, puny mortal.