Removing invasive predators from island breeding colonies could save more seabirds for less cost than reductions in fishing, a study of Australia’s Eastern Tuna and Billfish Fishery (ETBF) has found.

According to one of the authors of a paper on the findings in the August edition of Frontiers in Ecology and Environment, CSIRO scientist Dr Chris Wilcox, a major challenge for fisheries worldwide is to reduce their impact on ‘bycatch’ species such as seabirds.

“Australian Commonwealth fisheries have made strong efforts towards reducing bycatch, including modifying fishing gear and restricting areas and periods of fishing, but these measures are not always effective, leading to costly interventions such as fishery closure,” Dr Wilcox says.

Faster growth, darker leaves, a different way of branching - wild varieties of the plant Arabidopsis thaliana are often substantially different from the laboratory strain of this small mustard plant, a favorite of many plant biologists.

Which detailed differences distinguish the genomes of strains from the polar circle or the subtropics, from America, Africa or Asia has been investigated for the first time by research teams from TÃbingen, Germany, and California led by Detlef Weigel from the Max Planck Institute for Developmental Biology.

People with bipolar disorder – or manic depression – suffer from an accelerated shrinking of their brain, researchers at the University of Edinburgh have found.

The study shows for the first time that bipolar disorder – a condition characterised by periods of depression and periods of mania – is associated with a reduction in brain tissue and proves that the changes get progressively worse with each relapse.

This discovery has implications not only for the way we research the disease, but may also impact the way this condition is treated.

At very young ages, children’s defiant behavior toward their mothers may not be a bad thing. This defiance may in fact reflect children’s emerging autonomy and a confidence that they can control events that are important to them.

Those are the findings of a new study conducted by researchers at the University of Texas at Austin and the University of Michigan.

To understand how very young children react to being controlled by their parents, the researchers videotaped 119 mostly middle-class mothers as they interacted with their 14- to 27-month-old children. Mothers were asked to have their children avoid a set of attractive toys and, when play time was over, to get their children to help them clean up those toys they had been allowed to use.

Two NASA robots are surveying a rocky, isolated polar desert within a crater in the Arctic Circle. The study will help scientists learn how robots could evaluate potential outposts on the moon or Mars.

The robots, K10 Black and K10 Red, carry 3-D laser scanners and ground-penetrating radar. The team arrived at Haughton Crater at Devon Island, Canada, on July 12 and will operate the machines until July 31. Scientists chose the polar region because of the extreme environmental conditions, lack of infrastructure and resources, and geologic features. Also, Haughton Crater is geographically similar to Shackleton Crater at the South Pole of the moon. Both are impact craters that measure roughly 12.4 miles in diameter.

Even in the Animal Kingdom, there are some common sense rules. The more likely to get a big return, for example, the more work will be invested. That goes for male-female relationships as well.

A French team of behavioral ecologists demonstrated that in the Peafowl. They found that females with attractive mates invested more resources in their eggs than females paired with unattractive mates. They laid larger eggs and deposited more testosterone in egg yolk, potentially offering a better prospective to their offspring.

Adeline Loyau, Michel Saint Jalme, Robert Mauget, and Gabriele Sorci of the National Museum of Natural History and the Laboratory of Evolutive Parasitology, Paris, investigated maternal investment in the peafowl (Pavo cristatus).