Hyenas control their eating habits in response to climate change

Hyenas control their eating habits in response to climate change

Hyenas are in a key family grave in Kenya. Found: Jan Zwilling / Leibniz-IZW

Hyenas have been observed to reduce the movement of captives in their climate -affected territories. This is the main conclusion of a paper published in a scientific journal Europe. A team of researchers from the Leibniz Institute for Zoo and Wildlife Research (Leibniz-IZW), Germany, and the Center for Functional and Evolutionary Ecology (CEFE), France, investigated the relationship between the size of the rain and migration of herbivores to hyena family lands in the Serengeti National Park, Tanzania, and the responses of lactating hyenas to recent changes in climate change. Using data based on a three -year survey, they show that the current increase in rainfall has reduced the number of flowers moving to family lands. hyenas, but not related to the ability of female hyenas to enter their captivity and the traditional herdsman. .their children. This shows how highly hyenas eat in response to changing environmental conditions.

It is important to understand the mechanisms and numbers of animals in different ecosystems that are resistant to climate change. Changes in the timing or amount of rainfall can alter the growth of plants and therefore the distribution of migratory herbivores, such as the green wildebeest (Connochaetes taurinus) and the wild zebras. (Equus quagga) in the Serengeti ecosystem in Tanzania, East Africa. Climate change could change the location of good feeding grounds for predators, such as specific hyenas, which feed on these plants. A new paper has shown that hyenas (Crocuta crocuta) can change their eating habits as captives move to their homelands due to recent changes in the population. the nature and amount of rainfall.

Scientists from Leibniz-IZW and CEFE analyzed data from a long-term study on three families of hyenas found in the central Serengeti National Park. The three families were monitored on a daily basis from 1990 to 2019. The data shows that the Serengeti has been the most rainy in the last three years. At the same time, the availability of flowers was limited to hyena family lands. “To see how the hyenas respond to these changes in rain patterns and the number of captives on their lands, we looked at the migration of mothers – the arrival of hyenas. lactating hyenas with full-breasted babies in community pits, ”said Morgane Gicquel, the paper’s first author and medical student at Leibniz-IZW.

The research team found that within a year, migratory migrants to hyena family lands increased with the heavy rains of the previous two months, and the level of living conditions increased. The mother lived in the family lands with a lot of rain. family trip. As the amount of rainfall increased over the years, the number of hyena species in the hyena families decreased because the association between the rainfall and the movement of the flowers was weak. Surprisingly, the attendance of mothers did not decrease during the entire training period and was consistent with the times of most of the prisoners.

“The presence of mothers in the crater is an important factor in the survival of the cubs. The hyenas seen in the Serengeti National Park will reproduce throughout the year. We are confident. their babies are breastfed for the first six months of life, “explains Dr. Marion East and Prof Heribert Hofer, senior scientists at Leibniz-IZW who studied hyenas in the Serengeti during the study. “When a large group of migratory herbivores arrive on the family land, all the foster mothers in the land feed and feed their children every day. They feed the migratory herbivores. After one and some days they return to the community cemeteries to raise their children. “

It is likely that the decrease in migrant workers in family lands will increase the time mothers spend away from their children in search of food. Why didn’t the mother live in the hyena family less? “Our findings show that hyenas do not rely heavily on the idea of ​​where the flying flowers are in a given month, but use other methods to find good food in the summer. when to go, ”said Drs. Sarah Benhaiem, senior author of the paper and critical scientist at Leibniz-IZW. The hyena can gain information on the best way to travel from the pathway to the foster family’s hometown or trail. submitted by these members. Preliminary research by the Leibniz-IZW group has shown that hyenas use designated routes to travel to many countries. Dr. According to Sarah Benhaiem: “Using these methods allows hyenas to gain information about the progress of animals from the different families they encounter along the way.

“Our results show that hyenas are more likely to change the face of flying animals in their lands that are stimulated by climate change,” says Morgane Gicquel. “This demonstrates a high level of plasticity in responding to this large rock stimulus to a wide variety of environments,” said Drs. Sarah Cubaynes is a scientist at CEFE and co -author of the paper. While migratory herbivores in the Serengeti National Park are an important source of large carnivore species when they are stationed in their territories, only hyenas that regularly travel long distances outside of their native lands are the only ones. feed the moving herbivores. However, changes can also affect herbivore’s movement to other foods in this ecosystem.

Maternal social status and fraternal competition convert milk into known hyenas

More information:
Morgane Gicquel et al, It is not possible to change the climate by separating the interaction between a center-place where thieves eat and their prey. Europe (2022). DOI: 10.1002 / ecs2.4012

Courtesy of Forschungsverbund Berlin eV (FVB)

Directions: Hyenas seen adjusting their diet to respond to climate change (2022, April 4) Retrieved 4 April 2022 from https://phys.org/news/2022- 04-hyenas-adjust-foraging-behavior-response.html

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