Do Whales like Concrete Boats! - Page 2 - SailNet Community
Reply
 
LinkBack Thread Tools
post #11 of 12 Old 10-10-2010
tdw
Super Fuzzy Moderator
 
tdw's Avatar
 
Join Date: Oct 2006
Location: Sydney Australia
Posts: 16,409
Thanks: 15
Thanked 103 Times in 97 Posts
Rep Power: 10
     
Interesting StAnna.....our antifouling is black and a year ot two back had an experience with a mother humpback and calf. Definitely a case of mama coming over to check us out and then getting junior to join the party when she figured we were 'mostly harmless'.

Andrew B

“Life is a trick, and you get one chance to learn it.”
― Terry Pratchett, Nation

Malo 39 Classic
tdw is offline  
Quote Quick Reply Share with Facebook
Sponsored Links
Advertisement
 
post #12 of 12 Old 10-10-2010
Senior Slacker
 
SlowButSteady's Avatar
 
Join Date: Feb 2010
Location: SoCal
Posts: 4,223
Thanks: 0
Thanked 17 Times in 15 Posts
Rep Power: 6
 
Quote:
Originally Posted by poopdeckpappy View Post
Toothed whales use sound for location and communication, baleen whales use sound for communication only. If you get tagged by a Blue ,Hump,gray or another baleen whales it merely a case of wrong place, wrong time. Ya tagged by a toothed whale that's a different story, they know you are there, may not know what's there, but they know something is
Not exactly. It used to be thought that mysticetes (baleen whales) couldn't echolocate at all, mainly because they lack the specialized anatomical structures used by odontocetes (toothed whales) for such, and because they don't produce the high-frequency tones once thought to be necessary. However, while it is true that they can't track down small objects (prey, etc.), it appears that at least some mysticete species probably use lower frequency sounds for navigating, such as finding the bottom and ice surfaces. The effect is probably similar to the way human blind individuals often use their own foot-falls or cane taps to detect large objects (walls, phone poles, etc.). Although rather crude by "normal" echolocation standards, such a system would be quite useful for whales in turbid and/or deep waters, or at night. However, I don't know if they could detect a small boat.
SlowButSteady is offline  
Quote Quick Reply Share with Facebook
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the SailNet Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
Please note: After entering 3 characters a list of Usernames already in use will appear and the list will disappear once a valid Username is entered.


User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Forum Replies Last Post
Concrete Catch smillinjack General Discussion (sailing related) 9 05-09-2010 02:09 PM
Concrete keels - any facts? kulokoo Sailboat Design and Construction 4 03-22-2010 05:11 PM
Putting cleats on concrete grinfax Gear & Maintenance 18 08-21-2008 08:22 AM
Structural expert's concrete home survived Katrina - Biloxi Sun Herald NewsReader News Feeds 0 04-29-2007 04:15 PM
New concrete Greenbelt path replaces bumpy asphalt (The Idaho Statesman) NewsReader News Feeds 0 08-14-2006 04:15 AM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome