Ecology & Zoology

Courtesy of Guiomar Liste

By: Nala Rogers, Inside Science

(Inside Science) -- When ducklings head out to bathe in a pool, they usually follow the same individual, new research has found. But do they visit the pool that’s best for everyone, or just the one their chief prefers? This puzzle has made it hard for farmers to know how to provide for all their ducks equally, and for biologists to know what social animals really want.  

Talk to long-time anglers with a favorite spot and they will often tell stories of one fish they could never get. In mythical overtones, they will speak of its ability to avoid capture, attributing an almost supernatural intelligence (for a fish). Such stories were once so common that 'fish story' became its own brand of tall tale.

A new study mapped individual heritable traits of fish to environmental conditions and concluded that some fish really are going to be harder to catch.

The work by the University of Eastern Finland and the Finnish Game and Fisheries Research Institute
in the Paltamo Unit of the Finnish Game and Fisheries Research Institute

Ferns are an old plant species, dinosaurs munched on them over 200 million years ago. If we want to know how to survive against nature's onslaught over the long haul, ferns are as good a place as any to start.

Even recent ones can show us how to evolve and outlast. A group of ferns evolved much more recently, and they did it while colonizing the extreme environment of the high Andes. Their completely new morphology (form and structure) arose and diversified within the last 2 million years. How this group of ferns grew in a unique ecosystem of the Andean mountains was the subject of a new study by Dr. Patricia Sanchez-Baracaldo and Dr. Gavin Thomas.

Alpine goats appear to be shrinking in size, according to scholars at Durham University, and that is due to global warming over the past 30 years, they say.  

Young Chamois now weigh about 25 percent less than animals of the same age in the 1980s, they found, and note that in recent years, decreases in body size have been identified in a variety of animal species and have frequently been linked by other scholars to changing climate. 

Credit: Wikipedia

By Peter Gwynne, Inside Science

(Inside Science) – Each day small sea creatures known as plankton rise from deep underwater to the ocean's surface during the night and then return to the depths in daytime. Zoologists describe this “diel” movement, named after the Latin word for day, as Earth’s biggest migration.

Modern day kangaroos exhibit a hopping form of locomotion. Credit: Leo/Flickr, CC BY-SA

By Christine Janis, Brown University

Extinct giant kangaroos may have been built more for walking, rather than hopping like today’s kangaroos, especially when moving slowly.

Human bathroom walls contain messages that are wonderfully informative about our modern condition - they can tell you who to call if you have an evolutionary mandate to procreate or even notify you that someone else once peed in the same spot.

White-footed sportive lemurs learn a lot about each other due to bathrooms also. Only instead of writing on the walls, they use scent-marks to communicate with their own kind. A study published online in Behavioral Ecology and Sociobiology by Iris Dröscher and Peter Kappeler from the German Primate Center (DPZ) found that the urine left on latrine trees serves as a method to maintain contact with family members. It also serves as a means to inform an intruder that there is a male that will defend his partner.

Not every human can be a great leader but not everyone is made to follow either. This has been shown to apply to elsewhere in the animal kingdom as well: insect larvae follow a leader to forage for food, both leaders and followers benefit, growing much faster than if they are in a group of only leaders or only followers, according to a new study.

The research looked at larvae of the iconic Australian steel-blue sawfly Perga affinis often known as 'spitfires'. Sawfly larvae can grow to 7 centimeters long and forage nocturnally in Australian Eucalyptus trees, forming large groups that can strip all of the leaves from a tree in a few days.

No, it's nothing to do with a reptilian existential crisis – just a name game. Credit: melanie cook/Flickr, CC BY-NC-SA

By Dustin Welbourne

You have likely been to a zoo at some point and visited their reptile house.

A building where the climate control dial is stuck on the “wet sauna” setting, and filled with maniacal children competing to be the first to press their ice cream covered face and hands on every available piece of clean glass.

Why is biodiversity is higher in the tropics than in colder regions? It's one of ecology’s unsolved puzzles and has been since the European explorers and naturalists of the 17th and 18th centuries discovered there is a stunningly rich biodiversity in the tropics compared to the temperate regions of the world.

A research effort led by University of Arizona ecologists has now unearthed unexpected answers and helped found a new discipline, they call it functional biogeography, in the process.