Entries Tagged "squid"

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Friday Squid Blogging: Squids Don’t Like Pile-Driving Noises

New research:

Pile driving occurs during construction of marine platforms, including offshore windfarms, producing intense sounds that can adversely affect marine animals. We quantified how a commercially and economically important squid (Doryteuthis pealeii: Lesueur 1821) responded to pile driving sounds recorded from a windfarm installation within this species’ habitat. Fifteen-minute portions of these sounds were played to 16 individual squid. A subset of animals (n = 11) received a second exposure after a 24-h rest period. Body pattern changes, inking, jetting, and startle responses were observed and nearly all squid exhibited at least one response. These responses occurred primarily during the first 8 impulses and diminished quickly, indicating potential rapid, short-term habituation. Similar response rates were seen 24-h later, suggesting squid re-sensitized to the noise. Increased tolerance of anti-predatory alarm responses may alter squids’ ability to deter and evade predators. Noise exposure may also disrupt normal intraspecific communication and ecologically relevant responses to sound.

Press release.

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 January 29, 2021 at 4:06 PMView Comments

Friday Squid Blogging: China Launches Six New Squid Jigging Vessels

From Pingtan Marine Enterprise:

The 6 large-scale squid jigging vessels are normally operating vessels that returned to China earlier this year from the waters of Southwest Atlantic Ocean for maintenance and repair. These vessels left the port of Mawei on December 17, 2020 and are sailing to the fishing grounds in the international waters of the Southeast Pacific Ocean for operation.

I wonder if the company will include this blog post in its PR roundup.

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 January 15, 2021 at 4:03 PMView Comments

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Sidebar photo of Bruce Schneier by Joe MacInnis.