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mako הוא אתר הנתונים הערבי בישראל, שמציע חדשות, בידור, טלוויזיה, מדיני ואחרי התבוסה. האתר עדכנה על המלחמה בלבנון, החשד לרצח כפול בהגליל, התגלו גופות שני הצעירים והתשובת ישראל להפסקת אש
- אתרי התכניות
ערוץ 12 - כל מה שרציתם לדעת על תכניות קשת. רמזור, ארץ נהדרת,...
- לוח השידורים
מה יש היום בטלוויזיה? קשת 12 מציגה: לוח שידורים עם כל...
- הרשמה לתכניות
מאסטרים במטבח? ההרשמה לעונה החדשה של "מאסטר שף" נפתחההכינו...
- הורוסקופ
הורוסקופ יומי, הורוסקופ שבועי ותחזית יומית הכוללת את פרופיל...
- הטעם שבמים
מה אתם באמת יודעים על המים שאתם שותים, האם אתם יודעים מה...
- מחפשים מתכון לרגע האחרון? הכל כאן
מבחר מתכונים לראש השנה – מתכונים נהדרים לארוחות שלמות,...
- אתרי התכניות
MAKO is a new Japanese–inspired boutique bakery and pastry shop that features exceptionally handcrafted bread, pastries, cakes, and cookies.
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What is Mako in Python?
What is a shortfin mako?
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What is a mako shark?
Learn about mako shark, a genus of two species of fast and potentially dangerous sharks with pointed snouts and crescent tails. Find out where they live, what they eat, and why they are prized as food and game fish.
- The Editors of Encyclopaedia Britannica
Mako is a Python-based template engine that compiles into Python modules for fast and flexible rendering. It supports control structures, callable blocks, inheritance, filters, caching, and more.
- Overview
- Out of the Blue
- 'Jane Goodall Theory'
- Vanishing Sharks
- GeneratedCaptionsTabForHeroSec
What happens when there's suddenly food in the open ocean? Scientists set up an experiment in the remote southwestern Pacific to find out.
Thick as a torpedo and heavily scarred, the gigantic shark rises from the deep, circling the bait near the surface. At possibly 15 feet long, she is the biggest shortfin mako Riley Elliott has ever seen: "We were just struck with awe."
But it's what happened next that really floored the marine scientist.
A blue shark ten times smaller darted onto the scene and aggressively pushed the mako—the ocean's fastest shark—away. The bigger fish obliged, allowing the blue to eat in peace. (Explore a stunning interactive of the "lords of the sea.")
"What we saw broke a lot of theory in shark behavioral biology that size is the trump card," says Elliott, of the University of Auckland in New Zealand. Shark experts have always believed there's a clear hierarchy in how sharks interact with one another—namely, that size matters. But Elliott's observation seems to upend that.
While filming a new episode for Nat Geo WILD's SharkFest, Elliott traveled off the coast of New Zealand into the remote southwestern Pacific with a specific plan: To simulate a rare feeding event in the open ocean and observe how blue sharks and shortfin makos—both open-water sharks that tend to stick to their own kind—interact when forced into close proximity.
The open ocean is often called a blue desert. It's relatively low in life-forms with the exception of food-rich oases such as continental shelves and volcanic seamounts.
It's near a seamount that Elliott—a National Geographic Society grantee—and his team set up their experiment. They cut tuna into meter-cubed "ice pops" and chummed a half-mile trail over five days to lure sharks into the vicinity. (Read how sharks can find their way home in the vast ocean.)
James Anderson, a biologist at the University of Hawaii at Mānoa, noted that documenting such interspecies interactions is difficult—most studies that have examined shark behavior in baited situations deal with only one species.
"So gaining a better understanding of the dynamics of social relationships between species is interesting and novel," Anderson says by email.
There's a caveat: Behaviors seen in a baited situation are not necessarily natural, he adds.
"They might be the best proxy we have for behaviors that might be seen in response to a drifting food source, such as a whale carcass, but by the same token, a large drifting whale carcass does not force the animals to have to compete for the same resource, in the way that some fish carcasses on the end of a rope would do," says Anderson, who is also a National Geographic Society grantee. (Also read about how sharks 'shrug their shoulders' to swallow food.)
To Elliott, the most "ground-breaking" part of his experiment was observing what he calls Jane Goodall theory—the idea that animals' behavior is based on their own life experiences and personalities.
He says that could explain why the tiny blue shark dominated a mature mako—it had a lot of gumption, while the mako may have been more reserved. (Makos that size "don't get big by being dumb," Elliott quips.)
Above all, Elliott wants his work to educate the public and in turn stop the 90 percent decline in shark populations globally over the past 20 years—particularly in blue sharks.
For instance, though the slim, nocturnal hunters "aren’t the pinup boys of the shark world," they're abundant throughout the world's oceans and are major nutrient recyclers, he says.
Blue populations are still robust in the South Pacific—making it crucial to study the animals' behavior and lifestyle in one of its last strongholds. (See "14 Not-Fake Shark Pictures From a Real Nat Geo Photographer.")
"My passion is to give people insight into this unexplored area of shark research," says Elliott. "There’s no better way to capture an audience than with imagery they’ve never seen before."
A team of scientists observed how blue sharks and shortfin makos interact when forced into close proximity by bait in the remote southwestern Pacific. They saw a tiny blue shark push away a 15-foot mako, challenging the theory that size is the trump card in shark behavior.
- 1 min
- Christine Dell'Amore
Dec 18, 2018 · Learn about the two species of mako shark, their speed, size, habitat, diet, and other interesting features. Find out how makos are related to Māori culture, swordfish, and election forecasting.
Learn about the mako shark, a fast and warm-blooded predator that lives in temperate and tropical waters. Find out how they hunt, breed, and why they are vulnerable to fishing threats.
