Translation. Region: Russian Federal
Source: Rosneft – An important disclaimer is at the bottom of this article.
World Whale and Dolphin Day is celebrated annually on July 23. The date was established to draw humanity's attention to the need to preserve and protect cetaceans and other marine mammals.
Rosneft pays special attention to environmental issues and the preservation of biodiversity. The Company's activities are based on the principle of preserving a favorable environment and biological diversity in all regions of presence. Studying and protecting the population of whales and dolphins is one of the areas of Rosneft's environmental program.
One of the main species that receives close attention is the gray whale of the Okhotsk Sea population. The monitoring program for these whales has been carried out on the north-eastern shelf of Sakhalin Island for almost 30 years. As part of the research, specialists annually conduct a population census, observe the behavior of animals and study their food supply, carry out photo-identification studies, and acoustic monitoring.
Until the 1990s, the Okhotsk Sea gray whale population was considered to be completely exterminated and was classified as a species on the verge of extinction. In 2018, the western gray whale population was classified as endangered, indicating a slow but steady recovery of the Okhotsk subpopulation of gray whales.
In 2019, the Okhotsk Sea populations of gray and Greenland whales were included by the Russian Ministry of Natural Resources in the list of rare and endangered species of wildlife requiring priority measures for restoration and reintroduction. In 2020, the Okhotsk Sea population of gray whales was listed in the Red Book of the Russian Federation.
In addition, the Company conducts environmental monitoring of the Okhotsk-Korean population of gray whales on the north-eastern shelf of Sakhalin Island. Specialists annually perform photo identification, population census, and studies of the food supply and behavior of mammals. The main life period of gray whales in the Sea of Okhotsk is fattening and reproduction, so studying the state of their food supply is one of the most important stages of observations.
As part of the study of the Okhotsk-Korean gray whale population, unique acoustic monitoring is also being conducted, which includes recording and analyzing the level of natural and anthropogenic underwater noise. The research allows us to study the nature of sounds and model their propagation. Acoustic measurements are carried out using autonomous underwater recorders developed specifically for the project.
Rosneft is an active participant in the Interdepartmental Working Group under the Ministry of Natural Resources of the Russian Federation to ensure the conservation of the Okhotsk-Korean population of gray whales. The working group develops proposals for the development of legislation for population management, coordinates the interaction of interested federal and regional executive authorities, the business community, scientific and public organizations.
In 2020, Rosneft, together with the P.P. Shirshov Institute of Oceanology of the Russian Academy of Sciences, implemented a large-scale project to study and monitor Black Sea dolphins. Based on the results of 3 years of observations, modern up-to-date data were obtained on the number and preferred habitats of these Black Sea cetaceans, and the characteristics of their seasonal distribution. Recommendations for the study and conservation of dolphins were prepared.
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The gray whale is the only whale species that has mastered bottom feeding. Whales usually scoop up benthos from the bottom along with water, silt and pebbles at a depth of 15-60 m and filter the suspension through their baleen. The gray whale's diet includes up to 70 species of invertebrates, including annelids, bivalves, small crustaceans and young fish.
Gray whales swim slowly – on average 5-8 km/h, which allows marine parasites to cling to the whale's skin and establish their colonies. The total weight of these fellow travelers can reach 180 kg per whale.
Department of Information and AdvertisingPJSC NK RosneftJuly 23, 2025
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