Diver saves sea turtle, video


This video says about itself:

3 July 2014

Divers off the coast of Mexico save a sea turtle that became tangled in rope.

Special thanks to Colin Sutton & Cameron Dietrich who freed the turtle and shared their footage with us.

By Cate Matthews in the USA about this:

Diver Saves Sea Turtle And Receives Adorable Thank You (VIDEO)

07/14/2014 11:59 pm EDT

Not every story about sea life mistakenly caught in a net ends this beautifully, so it’s important to recognize when one does.

According to Dominican Republic social news site Lifestyle Cabarete, dive partners Cameron Dietrich and Colin Sutton were out spearfishing for tuna off the coast of Mexico earlier this year when Dietrich noticed something was not quite right. A sea turtle had been caught in the line.

Dietrich immediately jumped in to save the turtle, working quickly to remove the mess of ropes around its left flipper. Sutton followed close behind, his GoPro camera on and ready to capture the rescue.

The turtle swam away once freed, but then, to the two divers’ surprise, it circled back to Dietrich. For an incredible, breathtaking moment it rested inches above him in the water, close enough for Dietrich to reach out and hold it. It was almost as if the sea turtle was saying thank you.

The World Wildlife Fund names human fishing gear as the single greatest threat to sea turtles worldwide, so the fact that Dietrich and Sutton dived in means something. Most species of sea turtles are endangered, and it’s going to take everyone, from recreational spearfishers to commercial fisheries, to move them back from the red.

And with any luck, that means we’ll get more moments like this.

Reddish egrets, what do they eat?


This video from the USA is called Crazy Reddish Egret dance hunting for fish, Marco Island, Florida.

From Waterbirds in the USA:

Comparisons of Reddish Egret (Egretta rufescens) Diet During the Breeding Season Across its Geographic Range

Abstract

Although the prey of Reddish Egrets (Egretta rufescens) generally consists of shallow-water, euryhaline fish species, rangewide differences in breeding season diet have not been examined. Furthermore, the relative proportions of the two Reddish Egret color morphs vary from east to west across the species’ range. Color morph may influence foraging efficiency, but variations in prey across the species’ range and between morphs is undocumented.

By examining boluses from Reddish Egret (n = 109) nestlings, prey species proportions were compared between morphs, among regions and among colonies within Texas. Between regions, prey species and proportion of species differed widely; however, fish species with similar life histories were selected across the Reddish Egret’s range (Bahamas: 100% sheepshead minnow (Cyprinodon variegatus); Texas: 85% sheepshead minnow; Baja California Sur: 49% American shadow goby (Quietula y-cauda); Yucatán: 64% Yucatán pupfish (C. artifrons).

Within the Laguna Madre in Texas, significant differences in prey species were not detected between morphs (F(1,61) = 1.36, P = 0.224); however, prey mass by species differed between colonies (F(1,60) = 2.68, P = 0.010). While our results only pertain to Reddish Egret diet during the breeding season, this study increases our understanding of Reddish Egret ecology and provides initial diet information across the species’ range.

Toucan predicted Netherlands-Chile football match correctly


This video is about Rotterdam toco toucan Chicito. In the group phase of the World Cup football in Brazil, it predicted two out of the three matches of the Dutch team correctly, and the third one wrongly.

Before the Dutch team played Mexico, Chicito predicted they would win, as the video shows.

Indeed, the Dutch team proceeded to the stage of the best eight teams; where they will play Costa Rica.

What will Chicito predict on that match?

Netherlands 2- Mexico 1, congratulations with bird videos


This video from the Netherlands is called Birds of Texel preview.

In today’s quarter finals match of the football World Cup in Brazil, Mexico scored the first goal. However, in the last part of the match, the Netherlands scored two goals, to win 2-1 and to continue to the semi-finals.

Congratulations, with two wildlife videos. Two from the Netherlands, one for Mexico.

This video is about birds in the Fochteloërveen nature reserve in the Netherlands.

In spite of Mexico losing, the TV showed a Mexican woman after the match applauding for the play.

This video is about birds in Mexico.

Monarch butterfly migration, new research


This video from the USA says about itself:

Pacific monarchs migrate 2,500 miles between California and Mexico. This 10 minute segment captures some of the thousands of butterflies along the journey.

From Wildlife Extra:

Inbuilt compasses help monarch butterflies migrate

How new generations of monarch butterflies, despite never have travelled the distance before, find their way from their breeding sites in eastern United States to their overwintering habitat in central Mexico has long puzzled scientists.

Previous studies have revealed that the butterflies use a time-compensated sun compass in their antenna to help them make their 2,000 mile migratory journey to overwintering sites.

However how they found their way under dense cloud cover remained a mystery.

US scientists, using flight simulators equipped with artificial magnetic fields, found that if they changed the fields the monarchs oriented in the opposite direction, to the north instead of the south.

“Our study shows that monarchs use a sophisticated magnetic inclination compass system for navigation similar to that used by much larger-brained migratory vertebrates such as birds and sea turtles, ” said co-author Robert Gegear, from Worcester Polytechnic Institute.

“For migratory monarchs, the inclination compass may serve as an important back up system when daylight cues are unavailable.

“It may also augment hand-in-hand with the time-compensated sun compass to provide orientation and directionality throughout the migration process.”

To work, the compass is light dependant, relying on a certain wavelength of ultra-violet ray that can penetrate dense cloud.

However this study also opens up the possibility that the monarch survival could be vulnerable to potential disruption of the magnetic field.

“Greater knowledge of the mechanisms underlying the autumn migration may well aid in its preservation, currently threatened by climate change and by the continuing loss of milkweed and overwintering habitats,” said senior study author Steven Reppert of UMass Medical School.

“A new vulnerability to now consider is the potential disruption of the magnetic compass in the monarchs by human-induced electromagnetic noise, which can also affect geomagnetic orientation in migratory birds.”

Frida Kahlo and flowers, exhibition in New York City


This video is called FRIDA KAHLO (1907~1954): Biography – a Woman in Rebellion (DOCUMENTARY).

From daily The Morning Star in Britain today:

UNITED STATES: The New York Botanical Garden announced today that it is planning a major exhibition on Frida Kahlo next year that will examine how nature influenced her artwork.

It will also reimagine Kahlo’s garden and studio outside Mexico City, known as Casa Azul.

“Frida Kahlo’s Garden” will be on view from May 16 2015.

A group of rare paintings and works on paper highlighting Kahlo’s use of botanical imagery will also be on display.

This video is called Treasures of New York: The New York Botanical Garden.

Siberian origin of native Americans, new research


This video says about itself:

New World’s Oldest Human Skeleton Found in Mexico

16 May 2014

Scientists have found what they believe is the oldest nearly complete, genetically intact human skeleton in the Americas within a flooded cave in Mexico’s Yucatán Peninsula.

From Science:

16 May 2014

Paleoanthropology

Bones From a Watery ‘Black Hole’ Confirm First American Origins

Michael Balter

Most researchers agree that the earliest Americans came over from Asia via the Bering Strait between Siberia and Alaska, beginning at least 15,000 years ago. But many have long puzzled over findings that some of the earliest known skeletons—with long skulls and prominent foreheads—do not resemble today’s Native Americans, who tend to have rounder skulls and flatter faces. Some have even suggested that at least two migrations into the Americas were involved, one earlier and one later.

But the discovery of a nearly 13,000-year-old teenage girl in an underwater cave in Mexico’s Yucatán Peninsula argues against that hypothesis. The girl had the skull features of older skeletons, but the genetic profile of some of today’s Native Americans—suggesting that the anatomical differences were the result of evolutionary changes after the first Americans left Asia, rather than evidence of separate ancestry.

Also from Science:

Late Pleistocene Human Skeleton and mtDNA Link Paleoamericans and Modern Native Americans

Abstract

Because of differences in craniofacial morphology and dentition between the earliest American skeletons and modern Native Americans, separate origins have been postulated for them, despite genetic evidence to the contrary. We describe a near-complete human skeleton with an intact cranium and preserved DNA found with extinct fauna in a submerged cave on Mexico’s Yucatan Peninsula. This skeleton dates to between 13,000 and 12,000 calendar years ago and has Paleoamerican craniofacial characteristics and a Beringian-derived mitochondrial DNA (mtDNA) haplogroup (D1). Thus, the differences between Paleoamericans and Native Americans probably resulted from in situ evolution rather than separate ancestry.

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New tarantula discoveries in Argentina, one species named after musician Atahualpa Yupanqui


This video from Mexico says about itself:

The Mexican red rump tarantula is a large jet black spider with bright red hairs on its abdomen. Although little is known about the biology of the ‘vagans’, as is with most tarantulas, adult females are normally 5- 7.5 cm in body length, with a leg span up to 13 cm. Adult males are usually smaller and shorter.

Vibrant example of the “red rump” a.k.a. Brachypelma vagans. Mexican red-rumps are nocturnal predators, feeding on ground-dwelling insects, arachnids, crustaceans and more. Just like the common Chilean rose hair tarantula, it has irritating bristle hairs on its abdomen used as a defense against other predators.

From Wildlife Extra:

Three new tarantula species discovered

Three new tarantula species have been found in northern Argentina by a team of scientists from the Universidad de La República, Uruguay.

These new tarantula species belong to the subfamily Theraphosinae, which are distributed exclusively in the Americas, with the greatest diversity is found in South America.

Melloleitaoina mutquina, has been named after Mutquín, where this species is distributed, while M. uru was inspired [on] an ancient legend [in] Quichua, from the northern limit of Argentina, about the Inca princess Uru, who because of her whims and bad government was transformed by the gods into a spider and forced to endlessly work weaving. Lastly, the third new species M. yupanqui, was named to honour the most important Argentine musician of folklore Atahualpa Yupanqui.

These often hairy and very large spiders known as tarantulas are one of the most famous arachnid groups. Despite their ill fame as vicious killers most tarantulas are harmless to humans. Most tarantulas have a long lifespan, in particular females who can live between 15 and 30 years.

This music video is called Atahualpa Yupanqui – 1957 – Camino del Indio.

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