Chingiz Nigmatullin

Russian Federal Research Institute of Fisheries and Oceanography | VNIRO · Department of Ecology

Memorial paper on ichthyologist and naturalist Efim Kukuev (1947-2022)

Information is given about the main stages of the life and results of scientific and social activities of the prominent Russian ichthyologist and ecologist F.E. Alekseev, who in the 1960s-1990s was the brightest and most professional scientist of AtlantNIRO. His main achievements in scientific work were related to research on reproductive and popul...

There are described the history and main research results of commercial cephalopods investigations in the World Ocean by AtlantNIRO (Kalinigrad) team in 1960-2010s.

There were formulated a final goals of main biological systems – organism, population, community and biosphere and theirs relationships. The main goal of any organism is to reach its reproductive age and to participate in population’s reproduction. The population’s final goal is the reproduction. As the final goal of all communities and the living...

There are described the history and main results of fishery oceanography and ecology by AtlantNIRO (Kaliningrad) in 1960-2010s for Southwestern Atlantic.

An attempt has been made to formulate the ultimate goals of the main biological systems from the organism, population and community to the biosphere and their interrelationships. The main goal of any organism is to reach reproductive age and participate in the reproduction of the population. The ultimate goal of each population is reproduction. The...

The brief review of the two concepts of the Geomerida (structure and functioning of the living organism’s cover of the Earth) that were introduced in the first half of the 20th century, Russian biologists K.D. Starynkevic (1888-1926) and V.N. Beklemishev (1890-1962). Special attention is paid to the life and theoretical views of K.D. Starynkevic th...

Two main ecological and behavioral types in sharks and bony fishes are also found in other groups of oceanic eunecters, with the exception of sea snakes and turtles. In squids, these are alternative types of Thysanoteuthidae and Ommastrephidae, and in cetaceans - Mysticeti and Odontoceti (Nigmatullin, 2009). The presence of these types of eunecters...

For most oceanic fish, obtaining information about their feeding behavior is possible only using the traditional indirect method - reconstruction based on data on the composition of food organisms and their ecological and behavioral characteristics. The correctness of these reconstructions largely depends on taking into account the following errors...

It is generally accepted that the Commander squid (CS) Berryteuthis magister inhabits mainly the bottom water layers of the mainland slope, island slopes and underwater mountains, while the pelagial inhabits only its early stages – larvae, fry and juveniles up to 10-12 cm ML (review: Nesis, 1998). In this regard, the data obtained from complex echo...

During 1981±1989, 849 jumbo squid, Dosidicus gigas, from four open ocean regions of the east Paci®c (from 118N to 228S) were examined for parasitic helminths. The samples were collected from the Peruvian (9±218S and 82±878W), east equatorial (28N±68S and 84±878W), west equatorial (18N±38S and 96±1008W) and Nicaraguan (9±118N and 88±918W) regions. N...

Morphological characters, particularly the system of photophores, ranges and biological features of the squids belonging to the subfamily Ommastrephinae are revised. Differences between species are shown to be considerably greater in the structure and distribution of photophores than in other characters. The genus Ommastrephes is proposed to be res...

The taxonomy, functional morphology, evolutionary biology and ecology of the jumbo squid, Dosidicus gigas, were reviewed using the data from many Soviet/Russian expeditions and all available literature. D. gigas is one of the largest and most abundant of the nektonic squid in the epipelagic zone of the world Ocean. It occurs in the eastern Paci®c w...

During 1978-1986 oceanic squid Sthenoteuthis oualaniensis) have been studied for parasitic helminths: 303 squid from open waters of the Indian Ocean and 146 squid from nerito-oceanic part of the East Pacific (2°N-12°S. Eleven species of parasitic helminths were recorded: 2 Trematoda species, 5-Cestoda, 3-Nematoda and 1-Acantocephala. All these helm...

A total 21 species of nektonic squids in the family Ommastrephidae inhabit waters of the World Ocean. The expert evaluations of the instantaneous biomass were carried out for each species. Total instantaneous biomass for all ommastrephid squids is ~55 million t on average, total yearly production is ~ 400 million t (production/biomass coefficient-P...

There are briefly described the information on the system, phylogeny, ecological structure, ecological-population parameters, growth and life cycles, reproductive biology, behavior, biomass values, role in ecosystems and morphofunctional and ecological aspects of evolution in squids family Ommastrephidae.

Two nektonic squid species, Illex argentinus in the Southwest Atlantic and Dosidicus gigas in the Eastern Pacific, are amongst the largest commercial cephalopod resources; presently comprising from one third to almost one half of the global cephalopod catch. These squids are straddling stocks exploited during their ontogenetic migrations both withi...

Globally, cephalopods support large industrial-scale fisheries and small-scale to partly large-scale local artisanal fisheries. They are of increasing economic importance as evidenced by the rapid rise in their global landings from 1950 to 2014. Cephalopods are sensitive to environmental variability and climate change and many if not all species sh...

This study examines the impact of heavy commercial fishing on Illex argentinus and Doryteuthis gahi, two annual squid species around the Falkland Islands in the Southwest Atlantic. Changes in two life-history parameters; size at recruitment and size at maturity, were standardized for sea temperature and analysed in relation to relative biomass indi...

Cryptic speciation among morphologically homogeneous species is a phenomenon increasingly reported in cosmopolitan marine invertebrates. This situation usually leads to the discovery of new species, each of which occupies a smaller fraction of the original distributional range. The resolution of the taxonomic status of species complexes is essentia...

The jumbo squid Dosidicus gigas was recently claimed to be an iteroparous species with ovaries returning to an immature, resting stage after spawning. Analysis of the data and figures presented in two recent articles revealed that this claim was based on misinterpretation of histological information and that Dosidicus is not iteroparous. Having con...

Dosidicus gigas is the largest and heavy ommastrephid in the East Pacific, where his role as predator and prey is important in trophic food webs. It is also considered a multiple spawning, that continues feeding and growing even during their reproductive period. However, it is unknown the relationship between energy storage in the digestive gland a...

The paper describes the trophic and parasitic relations interfacing of mass abundant orangeback squid Sthenoteuthis pteropus (OS) in the open waters of the Tropical Atlantic. There are described the data on squid’s food, predator and helminth species compositions and theirs ontogenetic, sex and infraspecific variability, and on the place and role o...

The paper describes the trophic and parasitic relations interfacing of mass abundant orangeback squid Sthenoteuthis pteropus (OS) in the open waters of the Tropical Atlantic. There are described the data on squid's food, predator and helminth species compositions and theirs ontogenetic, sex and infraspecific variability, and on the place and role o...

Se analizó el contenido estomacal de 60 calamares Ommastrephes bartramii (160-392 mm mantle length, ML) recolectados en el Pacífico sudeste (entre 17° y 43°S), entre 1981 y 1984. Adicionalmente otros 22 calamares (165-365 mm ML) fueron examinaron por parásitos helmintos. Las principales presas fueron peces mictófidos (Symbolophorus evermanni, Mycto...

A new species of coccidian, Aggregata andresi, is described from the digestive tract of the flying squid Martialia hyadesi, an ommastrephid squid that lives in cold subantarctic waters in the Southwest Atlantic. Gamogonic and sporogonic stages were observed in the digestive tract of 96.5% studied hosts. Oocysts were ovoid to subspheroid in shape, 1...

Large-scale ecological investigations of oceanic squids of the genus Sthenoteuthis were carried out in the open waters of tropical zone of all three oceans during 1961-1990. They were focused on S. pteropus in the Atlantic and S. oualaniensis in the Indian and Pacific (mainly eastern Pacific) Oceans. The quantitative distribution of squids is not u...

Length composition, age, growth, reproductive biology, feeding and parasites were studied using 432 individuals of the squid Ornithoteuthis antillarum (1.8-138 mm ML) collected in the open waters of the tropical central-east Atlantic. In the region studied, only a small-sized and early-maturing population of O. antillarum occur. Statolith shape, de...

Ontogenetic changes in the body morphology, morphometrics, age, growth, maturation, fecundity, feeding spectrum and parasites were studied in 218 specimens of the oceanic nektonic squid Onychoteuthis banksi and in two specimens of the rare planktonic squid Chaunoteuthis mollis (Onychoteuthidae) caught in the tropical waters between 1977 and 1990. S...