last time I asked them, this is what they told me.
"we are lazy. we know that the porpoise need to eat alot more than us, they are warm blooded, ya know. So, when we see the porpoise, we know that if we can keep up with them, they will show us the way to a meal. The porpoise crowd the bait from above, we slam 'um from below."
maybe I am having flashbacks from high school.......who knows.........
same way that Iwa (aka Frigate) birds are known to track big(ger) fish and not just $hit-small bait like alot of other birds - they have been doing it for a long time and it works more than it doesn't...I agree w/the opinions above re following the smarter, higher-skilled hunters to the food...
Dolphin Sonar reaches far, far farther than any fish sense. It is far more sensitive than Tuna lateral lines, vision or sense of smell. They can detect bait schools from many miles away. Whales as well find schools of bait with sound and the tuna follow them too.
The Dolfinas find the bait (and as above, must find more meals than fish to survive due to their higher rates of metabolism) and the Tuna know that where they are, that's the likeliest spot to find a meal.
I'm with JohnD, Grander, Ali, and Mikeytalkswithdolphins...the dolphins are far more intelligent and possess far superior bait sensing and locating abilities than the tunas, so the tunas follow them for that reason.
I've looked in at a helluva lot of tuna stomach contents, but have never found a dolphin turd in one? 'Course, I gotta admit, I don't know what a tuna turd looks like, so ya never know!
Reb and Rubberhook are right too, the tunas do follow whales. Reason being, they feed on the very same "whale food" as the big guys...red crabs, shrimp, immature squid, octopi, cuttlefish, small fin bait.
According to a lot of the research I've done on stuff like this, this dolphin/tuna relationship thing is primarily found in various areas of the Pacific and not so much elsewhere.
As we used to say down in Mexico, "Coachies y atun estan hermanos del mar".
Is it possible that they work together? The porpoise find the food and the Tuna help chase it to the surface. Then the porpoise chase the tuna away after we show up to pick a couple off. They have an interest in protecting their resource. Thoughts?
Yup,allen that is secret to catching tuna's!!!!so next time I see you in the porpoise pile you better hang your ass off the swimstep and wait for the 4 banger!!!works better after a hard night of drinking