Olga Filatova

Olga Filatova
Lomonosov Moscow State University | MSU · Faculty of Biology

PhD

About

79
Publications
21,343
Reads
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770
Citations
Additional affiliations
April 2013 - March 2015
University of St Andrews
Position
  • Research Associate
October 2008 - March 2009
Vancouver Aquarium
Position
  • Visiting Scientist
October 2005 - present
Lomonosov Moscow State University
Position
  • Research Associate

Publications

Publications (79)
Article
Full-text available
In zooplankton-feeding baleen whales, site fidelity on the feeding grounds is usually expressed at a relatively large scale: although the whales remain in the general area, they move broadly within it, covering tens of kilometers per day. The gray whale, Eschrichtius robustus, is the only dedicated bottom feeder among baleen whales and its largely...
Article
Beaked whales (Family Ziphiidae, Odontoceti, Cetacea) are one of the least studied groups of cetaceans. Their preference for shelf slope or deep ocean waters, long dives, low surface profile, elusiveness, and lack of visible blow in most species makes them difficult to spot, especially in rougher sea-state conditions. Due to these features, some sp...
Conference Paper
Full-text available
C конца 1990-х годов чукотские охотники стали сообщать о росте числа добытых китов со специфическим «медицинским» запахом. Мясо таких китов несъедобно и может вызывать расстройство пищеварения. Анализ образцов тканей «вонючих» и обычных китов на содержание различных химических соединений пока не позволил однозначно идентифицировать вещество, вызыва...
Article
Cetacean species are highly mobile, most of them regularly travelling over long distances, thereby presenting complex obstacles to their conservation. Identification of their critical habitats, specifically those parts of a cetacean’s range that are essential for day‐to‐day survival and for maintaining a healthy population growth rate, is necessary...
Article
Killer whale call repertoires can provide information on social connections among groups and populations. Killer whales in Iceland and Norway exhibit similar ecology and behavior, are genetically related, and are presumed to have been in contact before the collapse of the Atlanto‐Scandian herring stock in the 1960s. However, photo‐identification su...
Article
This study provides the first description of the feeding aggregation recently formed by humpback whales in the Senyavin Strait, off eastern Chukotka. A total of 143 individuals were identified during the two summer and fall seasons of 2017 and 2018. More than half of the whales recorded in the first year were encountered again in the following year...
Article
Full-text available
Each resident-type (R-type) killer whale pod has a set of stereotyped calls that are culturally transmitted from mother to offspring. The functions of particular call types are not yet clearly understood, but it is believed that calls with two independently modulated frequency components (biphonic calls) play an important role in pod communication...
Article
Killer whales are top predators in marine trophic chains, and therefore their feeding preferences can substantially affect the abundance of species on the lower trophic levels. Killer whales are known to feed on many different types of prey from small fish to large whales, but a given killer whale population usually focuses on a specific type of pr...
Article
Full-text available
Humpback whales Megaptera novaeangliae that breed in the western North Pacific (WNP) are listed as endangered under the US Endangered Species Act. Previous research in the WNP concluded that the full extent of humpback whale breeding areas is unknown. Recovering this endangered population requires identifying all associated breeding grounds and pot...
Conference Paper
Full-text available
Представлена информация о ключевых местообитаниях двух наиболее распростра-ненных в морях Дальнего Востока видах китообразных рода Balaenoptera. Исследование проводилось в рамках проекта “Планирование перспективных охраняемых природных акваторий разного статуса в субарктической зоне дальневосточных морей” при финансовой поддержке Всемирного фонда д...
Article
Full-text available
Top predators strongly impact the structure of ecosystems through the top-down cascading effects on prey species. Killer whales (Orcinus orca), the top predators in marine ecosystems, are increasing their presence in the Arctic following the ice cover loss. The impact of killer whales on marine ecosystems differs dramatically across ecotypes: 'resi...
Technical Report
Full-text available
Killer whales have been shown to produce stereotyped pulsed calls that can be classified into types with repertoires of call types varying between different social groups, populations and ecotypes. Closely related groups share part of their call type repertoire, thus, describing and comparing repertoires of killer whale calls from different groups...
Article
Call classifications by human observers are often subjective yet they are critical to studies of animal communication, because only the categories that are relevant for the animals themselves actually make sense in terms of correlation to the context. In this paper we test whether independent observers can correctly detect differences and similarit...
Article
Full-text available
Mitochondrial DNA (mtDNA) differences between humpback whales on different feeding grounds can reflect the cultural transmission of migration destinations over generations, and therefore represent one of the very few cases of gene-culture coevolution identified in the animal kingdom. In Russian Pacific waters, photo-identification (photo-ID) studie...
Article
Full-text available
Mitochondrial DNA (mtDNA) differences between humpback whales on different feeding grounds can reflect the cultural transmission of migration destinations over generations, and therefore represent one of the very few cases of gene-culture coevolution identified in the animal kingdom. In Russian Pacific waters, photo-identification (photo-ID) studie...
Article
In the North Pacific, fish-eating R-type 'resident' and mammal-eating T-type 'transient' killer whales do not interbreed and differ in ecology and behavior. Full-length mitochondrial genomes (about 16.4 kbp) were sequenced and assembled for 12 R-type and 14 T-type killer whale samples from different areas of the western North Pacific. All R-type in...
Article
Humpback whales migrate seasonally from high latitude feeding areas to lower latitude breeding areas for mating and calving. In 2004–2006, a North Pacific basin-wide study called SPLASH was conducted as an international collaboration among various groups of researchers. The Russian Far East consists of multiple high latitude feeding areas and durin...
Article
Full-text available
Herring-eating killer whales debilitate herring with underwater tail slaps and likely herd herring into tighter schools using a feeding-specific low-frequency pulsed call (‘herding’ call). Feeding on herring may be dependent upon daylight, as the whales use their white underside to help herd herring; however, feeding at night has not been investiga...
Article
Many social animals have cultural traditions that may shape their societies while the social structure can in turn influence how the culture is acquired. Killer whales possess culturally transmitted dialects. The divergence of dialects was thought to occur simultaneously and consistently with the gradual fission of matrilines. In this paper we comp...
Article
Full-text available
Odontocete sounds are produced by two pairs of phonic lips situated in soft nares below the blowhole; the right pair is larger and is more likely to produce clicks, while the left pair is more likely to produce whistles. This has important implications for the cultural evolution of delphinid sounds: the greater the physical constraints, the greater...
Article
There are two recognized species in the genus Berardius, Baird's and Arnoux's beaked whales. In Japan, whalers have traditionally recognized two forms of Baird's beaked whales, the common “slate-gray” form and a smaller, rare “black” form. Previous comparison of mtDNA control region sequences from three black specimens to gray specimens around Japa...
Conference Paper
Full-text available
Demand for live-captured killer whales (KWs), both in Russia and internationally, has grown in the past decades. Since 2012, KWs have been captured in the western Okhotsk Sea: 2012 – 1, 2013 – 6, 2014 – min 3 (official number is unavailable). In 2015, the total allowed take for this area is 6. Recent studies confirm two KW ecotypes present in the R...
Article
Full-text available
Two ecotypes of killer whales—fish-eating and mammal-eating—have been found in the seas of the Russian Far East, but confirmation of their status required genetic studies of animals with known phenotype and foraging specialization. In this paper we combine the results of the analysis of nuclear genetic markers, isotopic composition of tissues and p...
Article
Cultural evolution is a powerful process shaping behavioural phenotypes of many species including our own. Killer whales are one of the species with relatively well-studied vocal culture. Pods have distinct dialects comprising a mix of unique and shared call types; calves adopt the call repertoire of their matriline through social learning. We revi...
Article
Full-text available
Killer whale populations may differ in genetics, morphology, ecology, and behavior. In the North Pacific, two sympatric populations (“resident” and “transient”) specialize on different prey (fish and marine mammals) and retain reproductive isolation. In the eastern North Atlantic, whales from the same populations have been observed feeding on both...
Article
The social structure of Baird’s beaked whales is completely unstudied, and it is unknown if either females or males form long-term social associations or occur in stable groups. In this paper we summarize our observations of individually identified animals over the span of 6 yr to provide insight on their long-term social structure. We have identif...
Article
The social structure of Baird's beaked whales is completely unstudied, and it is unknown if either females or males form long-term social associations or occur in stable groups. In this paper we summarize our observations of individually identified animals over the span of 6 yr to provide insight on their long-term social structure. We have identif...
Conference Paper
Full-text available
The North Pacific right whale (NPRW) is one of the rarest baleen whales in the world. In this study we combined for the first time sightings of the western population of right whales, collected opportunistically in Russian Far East waters from 2003 to 2014 with other published to date sightings in an attempt to evaluate distribution and potential r...
Article
Full-text available
We investigated the influence of the type of activity and the social context on the proportion of four different structural categories of stereotyped calls in the acoustic communication of Kamchatkan killer whales. Using generalized linear models, we described the dependence of each sound category on the type of activity, the number of killer whale...
Article
Humpback whales feed on a variety of prey, but significant differences likely occur between regional feeding grounds. In this study, the diets of humpback whales were analyzed by comparing stable isotope ratios in animal tissues at three humpback whale feeding grounds in the Russian Far East: Karaginsky Gulf, Anadyr Gulf, and the Commander Islands....
Article
Full-text available
Ultrasonic whistles were previously found in North Atlantic killer whales and were suggested to occur in eastern North Pacific killer whales based on the data from autonomous recorders. In this study ultrasonic whistles were found in the recordings from two encounters with the eastern North Pacific offshore ecotype killer whales and one encounter w...
Article
Although killer whale, Orcinus orca, dialects have been studied in detail in several populations, little attempt has been made to compare dialect characteristics between populations. In this study we investigated geographical variation in monophonic and biphonic calls among four resident populations from the North Pacific Ocean: Northern and Southe...
Article
Killer whales produce repertoires of stereotyped call types that are primarily transmitted vertically through social learning, leading to dialects between sympatric pods. The potential function of these call repertoires remains untested. In this study, we compared the reaction of Kamchatkan fish-eating killer whales to the playbacks of calls from t...
Article
Full-text available
Unlike most other mammals, killer whales are capable of vocal learning and learn the dialect of their natal pod from their mothers. The classical model of killer whale dialect development suggests that the repertoire of calls is learned only “vertically” from mother to offspring, and calls evolve gradually with time by random drift caused by the ac...
Article
Facial and vocal expressions of emotion have been found in a number of social mammal species and are thought to have evolved to aid social communication. There has been much debate about whether such signals are culturally inherited or are truly biologically innate. Evidence for the innateness of such signals can come from cross-cultural studies. P...
Article
Northeast Pacific resident-type killer whales (Orcinus orca) are known to form stable associations based on kinship between maternal relatives (matrilines) with a system of vocal dialects thought to reflect kinship relationships. We analyzed association patterns and acoustic similarity to study the social organization of killer whales in Avacha Gul...
Article
Full-text available
Odontocete echolocation has been actively studied in captivity, but there are few studies in the wild. Parameters of echolocation trains in free-ranging killer whales (Orcinus orca) are analyzed under different types of activity (foraging and traveling) and during foraging on different prey (salmon and Atka mackerel). The following parameters are c...
Article
Full-text available
The area usage by killer whales in Avacha Gulf (Kamchatka) was investigated. The activity type and GPS position with at least 5 min intervals were recorded. Photoidentification and acoustic recordings were used for the determination of pods, clans, and ecotypes. Resident groups of the Avacha clan were found to have the centre of their activities ar...
Article
Full-text available
Killer whales (Orcinus orca) are sighted regularly in coastal Alaska during the summer, but little is known about their movements through the area during the winter when weather and light limit the use of boat-based surveys. Acoustic monitoring provides a practical alternative because each extended resident killer whale family group or pod has a un...
Article
Full-text available
Here we present an acoustic approach for reliable sexing in four whistling duck species from the genus Dendrocygna and compare it with molecular and cloacal inspection techniques. In the four examined species, the White-faced Whistling Duck D. viduata, Fulvous Whistling Duck D. bicolor, Cuban Whistling Duck D. arborea and Red-billed Whistling Duck...
Article
Full-text available
In zoological systematics, the problem of categorization is solved traditionally by creating several levels of categories, such as class, order, family, genus, and species. In this paper, the same approach to classification of biphonic stereotyped calls of fish-eating killer whales from the eastern Kamchatka was used. The main goal of the paper is...
Article
Full-text available
In fish-eating North Pacific killer whales, large multi-pod aggregations of up to 100 animals often occur. These aggregations are thought to be reproductive gatherings where mating between members of different pods takes place. However, killer whales are social animals, and the role of these aggregations might also be establishing and maintaining s...
Article
Full-text available
Killer whale discrete calls include types containing an overlapping high-frequency component (biphonic calls) and types without an overlapping high-frequency component (monophonic calls). In the resident killer whales of the Northeast Pacific, biphonic discrete calls exhibit higher source levels than monophonic calls, which suggests different activ...
Article
Full-text available
Sounds in the mobbing call of arctic fox from Mednyi Island have a tendency to form different sequences. Such a phenomenon was studied in ground squirrels, but never described in Canidae. Two mathematical methods determination analysis and detection of hidden time patterns (T-patterns) in behavior of animals - were used. The determination analysis...
Article
Full-text available
The problem of categorization arises in any classification system because classes should be discrete while the characteristics of most natural objects and aspects of nature are more or less gradual. In systematics, this problem usually is solved by creating several levels of categories, such as class, order, family, genus and species. In the existi...
Article
It is usually impossible to identify the source of underwater sounds using an omnidirectional hydrophone. Traditionally, cetacean sounds are localized using hydrophone arrays, but arrays are bulky to handle and require special software. Here, we describe an easy-to-use, reliable device to localize underwater sounds by ear. It consists of two hydrop...
Article
Using a mobile hydrophone stereo system for real-time acoustic localization of killer whales (Orcinus orca): It is usually impossible to identify the source of underwater sounds using an omnidirectional hydrophone. Traditionally, cetacean sounds are localized using hydrophone arrays, but arrays are bulky to handle and require special software. Here...
Article
Full-text available
The data on some specific features of acoustic communication in toothed whales are summarized. The physical structure of different acoustic signals - clicks, pulsed calls, and whistles - is described using terms and notions of modern bioacoustics. The possible ways of producing different signals related to morphological features of whales are discu...