Featured Research

from universities, journals, and other organizations

Researcher Makes First-ever Observation Of Squid Caring For Eggs

Date:
December 15, 2005
Source:
University Of Rhode Island
Summary:
Squid have always been considered poor parents: they lay their eggs on the seafloor and leave them to develop on their own. But a University of Rhode Island scientist has made the first observation of parental care by squid when he used a remotely operated underwater vehicle in the deep sea to watch as five squid each carried thousands of eggs in their arms.

Squid (Gonatus onyx) carrying egg mass.
Credit: Image courtesy of Monterey Bay Aquarium Research Institute

Squid have always been considered poor parents: they lay their eggs on the seafloor and leave them to develop on their own. But a University of Rhode Island scientist has made the first observation of parental care by squid when he used a remotely operated underwater vehicle in the deep sea to watch as five squid each carried thousands of eggs in their arms.

The observations made in Monterey Canyon off California in 2000 and 2002 are reported in the Dec. 15 issue of the journal Nature.

“Our finding is unexpected because this behavior differs from the reproductive habits of all other known squid species,” wrote Brad Seibel, a URI assistant professor of biological sciences who collaborated with colleagues at the Monterey Bay Aquarium Research Institute on the discovery.

Gonatus onyx is one of the most abundant species of squid in the Atlantic and Pacific Oceans, but because it spawns at great depths it has been difficult to observe its reproductive behaviors.

Spectacular video and photographic images captured by Seibel show the squid transporting a tubular pouch of some 2,000 to 3,000 eggs attached to hooks under its arms. After several months, the mature eggs break away from the pouch and hatch before setting out on their own.

According to Seibel, repeated extension of the squid’s arms appeared to be an intentional effort to flush water through the eggs to aerate them in the oxygen-starved waters found at depths of 5,000 to 7,000 feet off California.

Seibel’s discovery was also unexpected because it was thought that the arm and mantle muscles of squid deteriorate soon after sexual maturation, rendering the adult squid incapable of carrying its eggs. Seibel said this may still be somewhat true, because the squid he observed were unable to swim as efficiently as unencumbered ones, making them more likely to be preyed upon by whales and seals.


Story Source:

The above story is based on materials provided by University Of Rhode Island. Note: Materials may be edited for content and length.


Cite This Page:

University Of Rhode Island. "Researcher Makes First-ever Observation Of Squid Caring For Eggs." ScienceDaily. ScienceDaily, 15 December 2005. <www.sciencedaily.com/releases/2005/12/051215082644.htm>.
University Of Rhode Island. (2005, December 15). Researcher Makes First-ever Observation Of Squid Caring For Eggs. ScienceDaily. Retrieved September 19, 2014 from www.sciencedaily.com/releases/2005/12/051215082644.htm
University Of Rhode Island. "Researcher Makes First-ever Observation Of Squid Caring For Eggs." ScienceDaily. www.sciencedaily.com/releases/2005/12/051215082644.htm (accessed September 19, 2014).

Share This



More Plants & Animals News

Friday, September 19, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Raw: Elephant Undergoes Surgery in Tbilisi Zoo

Raw: Elephant Undergoes Surgery in Tbilisi Zoo

AP (Sep. 18, 2014) Grand the elephant has successfully undergone surgery to remove a portion of infected tusk at Tbilisi Zoo in Georgia. British veterinary surgeons used an electric drill to extract the infected piece. (Sept. 18) Video provided by AP
Powered by NewsLook.com
Chimp Violence Study Renews Debate On Why They Kill

Chimp Violence Study Renews Debate On Why They Kill

Newsy (Sep. 17, 2014) The study weighs in on a debate over whether chimps are naturally violent or become that way due to human interference in the environment. Video provided by Newsy
Powered by NewsLook.com
Some Tobacco Farmers Thrive Amid Challenges

Some Tobacco Farmers Thrive Amid Challenges

AP (Sep. 16, 2014) The South's tobacco country is surviving, and even thriving in some cases, as demand overseas keeps growers in the fields of one of America's oldest cash crops. (Sept. 16) Video provided by AP
Powered by NewsLook.com
Scientists Given Rare Glimpse of 350-Kilo Colossal Squid

Scientists Given Rare Glimpse of 350-Kilo Colossal Squid

AFP (Sep. 16, 2014) Scientists say a female colossal squid weighing an estimated 350 kilograms (770 lbs) and thought to be only the second intact specimen ever found was carrying eggs when discovered in the Antarctic. Duration: 00:47 Video provided by AFP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins