Due to the threat of mice, the number of Tianda beams of the island is declining

Translator's press: Tristan Albatross Diomedea Dabbbenenena is a large -scale benchmark, a new species that was not confirmed until 1998. Since 2000, the Special Island Believers have occupied a place in the red list of endangered species on IUCN (World Natural League), but in subsequent research, it was found that the threat of the Tsitamin Bellyman facing The threat of rope fish is far beyond imagination, and their population population is greatly reduced, so in 2008, the Special Island Bucnters were raised to the level of critical species. Recently, the Chinese Department of Biological Diversity Protection and Green Development Foundation (referred to as China Green Fair, Green Club) International Department learned a research paper on the Special Island Belongs from an internationally renowned journal. Friends reference.

Photo source: peter Ryan

A new study published in the Journal of Applied ECOLOGY shows that the impact of predation on longevity species may be greater than previous people. Researchers use a complex population model, which clarifies the problems of decades: the influence of invasive mice on extremely endangered special island beams. Because this new study is not limited to only analysis of breed pair, it reveals the reasons for the missing population in the number of populations.

Animal protection organizations are often difficult to help all threat species because of limited resources. Therefore, it is a common problem about where to distribute resources and expenditures. A reduction of a species usually shows the urgency of intervention. However, this new study shows that for longevity species, the reduction of population population may be far as early as our discovery of this reduced trend.

Bucnters are one of the largest flying birds in the world, very long and longevity. The research team has marked a female believer named Wisdom. She is currently 65 years old and is still breeding. The reason why he can live for so long is because breeding is very slow. They usually need 5-15 years to start reproduction. A breeding can only be raised every 2 years to raise a young bird, because the young birds need to start flying for nearly 12 months. Next breeding.

Photo source: peter Ryan

Although it is one of the largest birds, the Birthday will be threatened by some smallest mammals, such as mice. On some small islands, such as Gough Island (Britain), Marion Island (South Africa) or Midway Islands, the non -local musculus introduced by the introduction Birds sometimes even eat adults. On these islands, the breeding rate of the Best Belt is very low, because many young birds have been prefeted by domestic rats.

Previously, because of the long life of the below, it was difficult for us to evaluate the consequences of mouse predation. In the study of many seabird species, it is usually only targeted at adult seabirds during the breeding period, and this kind of lack of thoughtful data may increase the difficulty in the increase or decrease of the number of species, and it will also make it more difficult for animal protection operations to become more difficult. For example, managing sexual assault species.

Since the monitoring in 2004, the extremely endangered special island beams of the Special Island Birds have died of a average half of the chicks per season from the predation of mice. However, during the same period, the number of breeding populations has remained stable: about 1500 pairs per year.

The natural resource protector has always been confused about the influence of mouse preferential impact on the number of believer. What are the benefits of destroying the mouse on the main breeding place of Geffu on the main breeding place of the world?

The new research papers published in the Journal of Applied Ecology gave a convincing answer. The complex group models used in research are no longer limited to the study of adult believers breeding pairs, but also include all young masters, as well as adult believers that have suspended reproduction in the southern waters.

In contrast to the previous research results, scientists have found that despite the stable number of reproduction pairs, the total number of Tsitamin below the Tsitamin has actually reduced more than 2,000 since 2004.

The researchers further inferred that in the next 30 years, the conclusions concluded that, compared with the actions of mouse extermination, the elimination of mice on the island will most likely increase the number of Tianda Skymall in 2050 by 2-8 times.

However, there is great uncertainty about the number of fabrics, mainly because it is difficult to know whether the young Massuria is still alive. After being able to fly, the Bucnters will spend 2-20 years at sea, which brings the number of statistical difficulties to researchers. This uncertainty makes the estimation of the size of the bending population a little inaccurate. When the number of populations in the next 30 years is inferred, the number of deviations may be thousands of deviations. Nevertheless, the latest research is still the most reliable, and it provides many new information for guiding management decisions.

International Bird League Sea Bird Science Officer Bethay Clark said: "Monitoring is very difficult because a large part of the bearingmen always stay away from the breeding place. The complex group models used in this study overcome some of these challenges. And to provide managers with quantitative data evidence about invasion of mice and eliminating potential benefits of mice. "John Cooper, an information officer of the" Bellyman and Haiyan Protection Agreement " The importance of discovery. He said: "In addition to the continuous arrests and arrests in fishery, this research has given us hope that if the government fulfills its commitment under the" Convention on the Migration "and provides financial support, through technical and feasible management actions, the technical operational operation, which can be technically feasible, and can manage it. The number of believer can be restored. Research conclusions show that the elimination of mice on the breeding islands breed by the below greatness will be a very effective strategy to restore the number of faithfulness.

For the original text: https://phys.org/news/2022-06-albatross-popurations-declining-nvasive.html

Compilation: SARA

Review: lucy

Edit: Pierre

- END -