Male Black Widows Strive for Mate's Monogamy
Science Quickly
Scientific American
4.4 • 1.4K Ratings
🗓️ 16 July 2015
⏱️ 2 minutes
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| 0:00.0 | This is Scientific American's 60 Second Science. I'm Christopher Intalyata. Got a minute? |
| 0:07.0 | Island View Beach in British Columbia has all the makings of a perfect summer outing. |
| 0:12.0 | Great views, seclusion, sand dunes and driftwood, |
| 0:16.3 | there's just one minor detail. |
| 0:18.8 | That driftwood, it hosts two to three Black Widow spider webs per square meter. |
| 0:23.8 | To some people, a beach full of Black Widows |
| 0:27.7 | does sound like a nightmare. |
| 0:29.7 | But to me, it's awesome, and it's not scary at all. |
| 0:33.7 | Catherine Scott studies spider behavior at Simon Fraser University in British |
| 0:38.1 | Columbia and in case you're wondering? |
| 0:40.3 | I've never been bitten by a black widow and I'm not at all concerned about being bitten by a black widow. |
| 0:45.0 | Scott's research brought her to Islandview Beach to study the mating habits of black widow spiders. |
| 0:50.0 | The basics are this. |
| 0:52.0 | So if you're a male black widow, your goal in life is to find a female and mate with her and father as many of her offspring as possible. |
| 1:00.0 | Achieving that goal includes some architectural alterations by the males during their several hours |
| 1:05.6 | of courtship. |
| 1:06.8 | They snip the female's web to pieces and then bundle the tattered web in their own silk. Scott and her colleagues found that |
| 1:14.2 | webs treated this way don't attract other prowling males the same way an |
| 1:18.1 | intact web does. Meaning, it's not so much the best male but the first male to arrive that will win if he's able to |
| 1:27.3 | To quickly find a female and and reduce her web and the reason this tactic works, the researchers say females encode pheromones, like chemical |
| 1:36.3 | personal ads in their webs, advertising their age, hunger level, and mating status. |
| 1:42.4 | And the first arriving male's craftsmanship may |
... |
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