Entries Tagged "squid"

Page 9 of 98

Friday Squid Blogging: Squid Brains

Researchers have new evidence of how squid brains develop:

Researchers from the FAS Center for Systems Biology describe how they used a new live-imaging technique to watch neurons being created in the embryo in almost real-time. They were then able to track those cells through the development of the nervous system in the retina. What they saw surprised them.

The neural stem cells they tracked behaved eerily similar to the way these cells behave in vertebrates during the development of their nervous system.

It suggests that vertebrates and cephalopods, despite diverging from each other 500 million years ago, not only are using similar mechanisms to make their big brains but that this process and the way the cells act, divide, and are shaped may essentially layout the blueprint required develop this kind of nervous system.

As usual, you can also use this squid post to talk about the security stories in the news that I haven’t covered.

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Posted on November 18, 2022 at 5:12 PM • View Comments

Friday Squid Blogging: Newfoundland Giant Squid Sculpture

In 1878, a 55-foot-long giant squid washed up on the shores of Glover’s Harbour, Newfoundland. It’s the largest giant squid ever recorded—although scientists now think that the size was an exaggeration or the result of postmortem stretching—and there’s a full-sized statue of it near the beach where it was found.

As usual, you can also use this squid post to talk about the security stories in the news that I haven’t covered.

Read my blog posting guidelines here.

Posted on November 4, 2022 at 4:01 PM • View Comments

Friday Squid Blogging: Chinese Squid Fishing

China claims that it is “engaging in responsible squid fishing”:

Chen Xinjun, dean of the College of Marine Sciences at Shanghai Ocean University, made the remarks in response to recent accusations by foreign reporters and actor Leonardo DiCaprio that China is depleting its own fish stock and that Chinese boats have sailed to other waters to continue deep-sea fishing, particularly near Ecuador, affecting local fish stocks in the South American nation.

As usual, you can also use this squid post to talk about the security stories in the news that I haven’t covered.

Read my blog posting guidelines here.

Posted on October 28, 2022 at 3:57 PM • View Comments

Friday Squid Blogging: The Reproductive Habits of Giant Squid

Interesting:

A recent study on giant squid that have washed ashore along the Sea of Japan coast has raised the possibility that the animal has a different reproductive method than many other types of squid.

Almost all squid and octopus species are polygamous, with multiple males passing sperm to a single female. Giant squids were thought to have a similar form reproduction.

However, a group led by Professor Noritaka Hirohashi, 57, a professor of reproductive biology in the Faculty of Life and Environmental Sciences at Shimane University suspects differently.

They examined 66 sperm “bags” attached to five different locations on the body of a female that washed ashore in Ine Town of Kyoto Prefecture in 2020, and found that all of them were from the same male.

It is rare for a female with sperm attached to be found, and further verification is needed, but the study’s results indicate that giant squid, unlike other squids, may be “monogamous.” That is, females may receive sperm from only one certain male. Hirohashi and his colleagues published their findings in an international scientific journal in July of 2021.

As usual, you can also use this squid post to talk about the security stories in the news that I haven’t covered.

Read my blog posting guidelines here.

Posted on October 21, 2022 at 3:12 PM • View Comments

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Sidebar photo of Bruce Schneier by Joe MacInnis.