Pub Date : 2024-06-25DOI: 10.1134/s0032945224700164
A. O. Kasumyan, V. V. Zdanovich, V. V. Sataeva
Abstract
For the first time, the locomotor activity of the intact and visually deprived Senegal bichir Polypterus senegalus was assessed at different water temperatures (20, 25, 30 and 34°C). Using the open field test, it was shown that in intact fish, with increasing temperature, locomotor activity increases (most rapidly in the range of 20–25°C) and reaches a maximum at a temperature of 30°C, which can be close to the temperature optimum (or correspond to it) for the Senegal bichir. In visually deprived fish, locomotor activity is maximum at 20°C and decreases monotonically with increasing temperature; all indicators of locomotor activity (frequency of crossing test lines; time spent crossing the test line; distance covered by the fish; swimming speed) vary in visually deprived fish weaker than in intact ones. The differences in the behavior of intact and visually deprived fish indicate the presence of a functional relationship between vision and locomotor activity in evolutionarily ancient Cladistia.
{"title":"Locomotor Activity of the Intact and Visually Deprived Senegal Bichir Polypterus senegalus (Cladistia) at Different Water Temperatures","authors":"A. O. Kasumyan, V. V. Zdanovich, V. V. Sataeva","doi":"10.1134/s0032945224700164","DOIUrl":"https://doi.org/10.1134/s0032945224700164","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>For the first time, the locomotor activity of the intact and visually deprived Senegal bichir <i>Polypterus senegalus</i> was assessed at different water temperatures (20, 25, 30 and 34°C). Using the open field test, it was shown that in intact fish, with increasing temperature, locomotor activity increases (most rapidly in the range of 20–25°C) and reaches a maximum at a temperature of 30°C, which can be close to the temperature optimum (or correspond to it) for the Senegal bichir. In visually deprived fish, locomotor activity is maximum at 20°C and decreases monotonically with increasing temperature; all indicators of locomotor activity (frequency of crossing test lines; time spent crossing the test line; distance covered by the fish; swimming speed) vary in visually deprived fish weaker than in intact ones. The differences in the behavior of intact and visually deprived fish indicate the presence of a functional relationship between vision and locomotor activity in evolutionarily ancient Cladistia.</p>","PeriodicalId":48537,"journal":{"name":"Journal of Ichthyology","volume":"186 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2024-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141513820","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-05-14DOI: 10.1134/s0032945224020097
D. S. Pavlov, V. Yu. Parshina, V. V. Kostin
Abstract
Individual movement parameters for the zebrafish Danio rerio and the Prussian carp Carassius gibelio during starvation for 12 days have been determined in an experimental hydrodynamic installation circular tank. The fishes represent two tactics of behavioral responses on starvation. The tactics of unidirectional responses have been manifested in the movement of individuals in one direction relative to the water flow on days 2–5 of starvation. The tactics of multidirectional responses have been manifested on days 10–12 of starvation as movements in different directions relative to the water flow. The population advantages of such behavioral tactics of fish response to an unfavorable factor are considered.
{"title":"Tactics of Fish Behavior in the Water Flow during Starvation","authors":"D. S. Pavlov, V. Yu. Parshina, V. V. Kostin","doi":"10.1134/s0032945224020097","DOIUrl":"https://doi.org/10.1134/s0032945224020097","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Individual movement parameters for the zebrafish <i>Danio rerio</i> and the Prussian carp <i>Carassius gibelio</i> during starvation for 12 days have been determined in an experimental hydrodynamic installation <i>circular tank</i>. The fishes represent two tactics of behavioral responses on starvation. The tactics of unidirectional responses have been manifested in the movement of individuals in one direction relative to the water flow on days 2–5 of starvation. The tactics of multidirectional responses have been manifested on days 10–12 of starvation as movements in different directions relative to the water flow. The population advantages of such behavioral tactics of fish response to an unfavorable factor are considered.</p>","PeriodicalId":48537,"journal":{"name":"Journal of Ichthyology","volume":"30 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2024-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140941217","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-05-14DOI: 10.1134/s0032945224020048
Sen Tok Kim
Abstract—
The pattern of seasonal cycles of changes in the intra-annual distribution of fish in Pacific waters off the northern Kuril Islands is considered and their probable causes are determined. The subarctic structure of water masses along the Pacific coast off the northern Kuril Islands largely determines the conservatism of the vertical (bathymetric) structure of seasonal fish aggregations. The dynamic character of currents in the area off the islands with a large number of straits leads to significant variability in the location of fish aggregations in the direction along the coastline in interannual and seasonal aspects. In the autumn-winter period of the year, with cooling, the core of the total ichthyomass moves towards the upper slope of southeastern Kamchatka and the southern protrusion of the slope off Paramushir Island. In the spring-summer period, with warming, fish migrate dynamically along the slope to the south reaching lower depths in the shelf zone. At this time, fish are distributed along the entire Pacific coast off the northern Kuril Islands, forming separate aggregations on the shelf and upper parts of the slope off Paramushir and Onekotan islands, as well as on the slopes of the Fourth Kuril Strait and guyots near the above islands. The bathymetric range of fish habitat generally varies from 100–450 m in the cold season to 50–250 m in the warm feeding season.
{"title":"The Features of Demersal Fish Seasonal Distribution on the Pacific Shelf off the Northern Kuril Islands","authors":"Sen Tok Kim","doi":"10.1134/s0032945224020048","DOIUrl":"https://doi.org/10.1134/s0032945224020048","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">\u0000<b>Abstract</b>—</h3><p>The pattern of seasonal cycles of changes in the intra-annual distribution of fish in Pacific waters off the northern Kuril Islands is considered and their probable causes are determined. The subarctic structure of water masses along the Pacific coast off the northern Kuril Islands largely determines the conservatism of the vertical (bathymetric) structure of seasonal fish aggregations. The dynamic character of currents in the area off the islands with a large number of straits leads to significant variability in the location of fish aggregations in the direction along the coastline in interannual and seasonal aspects. In the autumn-winter period of the year, with cooling, the core of the total ichthyomass moves towards the upper slope of southeastern Kamchatka and the southern protrusion of the slope off Paramushir Island. In the spring-summer period, with warming, fish migrate dynamically along the slope to the south reaching lower depths in the shelf zone. At this time, fish are distributed along the entire Pacific coast off the northern Kuril Islands, forming separate aggregations on the shelf and upper parts of the slope off Paramushir and Onekotan islands, as well as on the slopes of the Fourth Kuril Strait and guyots near the above islands. The bathymetric range of fish habitat generally varies from 100–450 m in the cold season to 50–250 m in the warm feeding season.</p>","PeriodicalId":48537,"journal":{"name":"Journal of Ichthyology","volume":"152 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2024-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140941293","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-05-14DOI: 10.1134/s003294522402005x
E. I. Kaivarainen, N. N. Fokina, N. L. Rendakov, D. A. Efremov, N. N. Nemova
Abstract
Data are presented on changes in the activity of the membrane-bound osmoregulatory enzyme Na+/K+-ATPase and lipid composition in the gills of pink salmon Oncorhynchus gorbuscha during spawning migration from the White Sea to the river environment through the estuary. The compensatory reaction of pink salmon in a hypoosmotic environment is accompanied by a decrease in Na+/K+-ATPase activity and a change in the content of phosphatidylserine and polyunsaturated fatty acids (linoleic, eicosapentaenoic and docosahexaenoic). The results obtained indicate that effective osmoregulation in pink salmon during spawning migration from the sea to the river allows the implementation of a reproductive strategy.
{"title":"Changes in the Activity of Na+/K+-ATPase and in the Lipid Composition of the Gills of Pink Salmon Oncorhynchus gorbuscha (Salmonidae) from the White Sea in the Course of Spawning Migration","authors":"E. I. Kaivarainen, N. N. Fokina, N. L. Rendakov, D. A. Efremov, N. N. Nemova","doi":"10.1134/s003294522402005x","DOIUrl":"https://doi.org/10.1134/s003294522402005x","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Data are presented on changes in the activity of the membrane-bound osmoregulatory enzyme Na<sup>+</sup>/K<sup>+</sup>-ATPase and lipid composition in the gills of pink salmon <i>Oncorhynchus gorbuscha</i> during spawning migration from the White Sea to the river environment through the estuary. The compensatory reaction of pink salmon in a hypoosmotic environment is accompanied by a decrease in Na<sup>+</sup>/K<sup>+</sup>-ATPase activity and a change in the content of phosphatidylserine and polyunsaturated fatty acids (linoleic, eicosapentaenoic and docosahexaenoic). The results obtained indicate that effective osmoregulation in pink salmon during spawning migration from the sea to the river allows the implementation of a reproductive strategy.</p>","PeriodicalId":48537,"journal":{"name":"Journal of Ichthyology","volume":"123 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2024-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140941216","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-05-14DOI: 10.1134/s0032945224020024
E. S. Gromova, V. V. Makhotin
Abstract—
A comparative analysis of the diversity in structure of gill cover and branchiostegal rays in Teleostei is presented. The variants of these bony structures are systematized according to the special features of their function during feeding and respiration. The morphology of the main opercular muscles is described. The special features of working m. levator operculi are discussed. The functional causes underlying the trend of decreasing size of the operculum and formation of a muscular gill cover are described. Possible factors influencing the changes in the shape and location of the opercular bones and branchiostegal rays are outlined.
{"title":"Structure and Function of Gill Cover and Branchiostegal Rays in Teleostei","authors":"E. S. Gromova, V. V. Makhotin","doi":"10.1134/s0032945224020024","DOIUrl":"https://doi.org/10.1134/s0032945224020024","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">\u0000<b>Abstract</b>—</h3><p>A comparative analysis of the diversity in structure of gill cover and branchiostegal rays in Teleostei is presented. The variants of these bony structures are systematized according to the special features of their function during feeding and respiration. The morphology of the main opercular muscles is described. The special features of working m. levator operculi are discussed. The functional causes underlying the trend of decreasing size of the operculum and formation of a muscular gill cover are described. Possible factors influencing the changes in the shape and location of the opercular bones and branchiostegal rays are outlined.</p>","PeriodicalId":48537,"journal":{"name":"Journal of Ichthyology","volume":"22 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2024-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140941292","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-05-14DOI: 10.1134/s0032945224020061
V. V. Napazakov
Abstract
The results of analysis on the feeding patterns and assessment of the trophic levels and niches in two Zoarcidae species Bothrocara brunneum and B. zestum from the deep-water areas in the Sea of Okhotsk and the Pacific Ocean off the Lesser Kuril Ridge have been reported. Both species feed on various benthic and mesobenthic forage organisms including crustaceans, mesopelagic fishes, cephalopods, bivalved mollusks, polychaetes, and echinoderms. Despite the dominant food component variability across different water areas, crustaceans represent the major food group. In addition, both fish species have similar food sources and, therefore, trophic niches. It is proven by estimation with the standard ellipse area method via the Bayesian probability, showing rather similar widths of trophic niches: 17.7 for B. zestum and 16.6 for B. brunneum. The actual values for stable nitrogen isotope ratios (δ15N) in food components indicate a wide range of trophic levels in the analyzed species: from 2.08 to 4.36 in B. zestum and from 1.97 to 4.42 in B. brunneum, which can prove their plasticity in selecting the food items. The ranges of values for the stable carbon isotope ratios (δ13C) in food components indicating the basal food sources reached 15.04 to 23.43‰ for B. zestum and 15.07 to 23.43‰ for B. brunneum. The survey-based new information on two species feeding was obtained to determine their roles in the trophic structures of ecosystems in the studied water areas.
{"title":"A Comparative Study of Feeding Ecology and Trophic Relationships of Bothrocara brunneum and B. zestum (Zoarcidae) from Northwest Pacific Deep-Sea Ecosystems","authors":"V. V. Napazakov","doi":"10.1134/s0032945224020061","DOIUrl":"https://doi.org/10.1134/s0032945224020061","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The results of analysis on the feeding patterns and assessment of the trophic levels and niches in two Zoarcidae species <i>Bothrocara brunneum</i> and <i>B. zestum</i> from the deep-water areas in the Sea of Okhotsk and the Pacific Ocean off the Lesser Kuril Ridge have been reported. Both species feed on various benthic and mesobenthic forage organisms including crustaceans, mesopelagic fishes, cephalopods, bivalved mollusks, polychaetes, and echinoderms. Despite the dominant food component variability across different water areas, crustaceans represent the major food group. In addition, both fish species have similar food sources and, therefore, trophic niches. It is proven by estimation with the standard ellipse area method via the Bayesian probability, showing rather similar widths of trophic niches: 17.7 for <i>B. zestum</i> and 16.6 for <i>B. brunneum</i>. The actual values for stable nitrogen isotope ratios (δ<sup>15</sup>N) in food components indicate a wide range of trophic levels in the analyzed species: from 2.08 to 4.36 in <i>B. zestum</i> and from 1.97 to 4.42 in <i>B. brunneum</i>, which can prove their plasticity in selecting the food items. The ranges of values for the stable carbon isotope ratios (δ<sup>13</sup>C) in food components indicating the basal food sources reached 15.04 to 23.43‰ for <i>B. zestum</i> and 15.07 to 23.43‰ for <i>B. brunneum</i>. The survey-based new information on two species feeding was obtained to determine their roles in the trophic structures of ecosystems in the studied water areas.</p>","PeriodicalId":48537,"journal":{"name":"Journal of Ichthyology","volume":"7 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2024-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140941214","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-05-14DOI: 10.1134/s0032945224020140
T. A. Suvorova, A. V. German
Abstract
The results of a comparative study of the leukocyte formula of the bream Abramis brama, living in the Ivankovo, Uglich and Rybinsk reservoirs, have been presented. Significant differences in the content of band neutrophils and eosinophils in the peripheral blood, pronephros and spleen between individuals of all studied reservoirs were recorded. The highest leukocyte abundance index was observed in bream from the Uglich Reservoir.
{"title":"Percentage of Leukocytes in Peripheral Blood, Head Kidney, and Spleen of the Abramis brama (Cyprinidae) Bream of the Upper Volga Reservoirs","authors":"T. A. Suvorova, A. V. German","doi":"10.1134/s0032945224020140","DOIUrl":"https://doi.org/10.1134/s0032945224020140","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The results of a comparative study of the leukocyte formula of the bream <i>Abramis brama</i>, living in the Ivankovo, Uglich and Rybinsk reservoirs, have been presented. Significant differences in the content of band neutrophils and eosinophils in the peripheral blood, pronephros and spleen between individuals of all studied reservoirs were recorded. The highest leukocyte abundance index was observed in bream from the Uglich Reservoir.</p>","PeriodicalId":48537,"journal":{"name":"Journal of Ichthyology","volume":"149 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2024-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140941222","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-05-14DOI: 10.1134/s0032945224020012
A. I. Alferof, D. S. Kurnosov
Abstract
The outcomes from the survey research in distribution of the giant grenadier Coryphaenoides pectoralis at different stages of development in the Northwest Bering Sea over 1963–2020 have been reported. The data for 37 thousand catches performed with the bottom and multi-depth trawls at the depths between 0–1200 m are processed. It has been revealed that the species fish tend to spawn throughout the year, with two periods of peak spawning activity in the second half of a spring season and from the late summer season to the first half of an autumn season. The female fish ready to spawn migrate down the water column, keeping deeper than 600 m, where the males ready to spawn are concentrated. After spawning, they come back to the feeding areas of less water depths. The juvenile giant grenadier less than 30 cm in length can be encountered in the mesopaelagic and upper bathypelagic zones, which do not appear to form dense aggregations. The majority of the specimens less than 30–40 cm in length and smaller commonly leave this water column layer to occupy the bottom water layers along the continental shelf. Such differentiation between the juvenils and the sexually mature specimens can provide the opportunity to avoid cannibalism and to use the habitat food sources efficiently.
{"title":"Life Cycle Characteristics and Distribution of Giant Grenadier Coryphaenoides pectoralis (Macrouridae) in Northwest Bering Sea","authors":"A. I. Alferof, D. S. Kurnosov","doi":"10.1134/s0032945224020012","DOIUrl":"https://doi.org/10.1134/s0032945224020012","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The outcomes from the survey research in distribution of the giant grenadier <i>Coryphaenoides pectoralis</i> at different stages of development in the Northwest Bering Sea over 1963–2020 have been reported. The data for 37 thousand catches performed with the bottom and multi-depth trawls at the depths between 0–1200 m are processed. It has been revealed that the species fish tend to spawn throughout the year, with two periods of peak spawning activity in the second half of a spring season and from the late summer season to the first half of an autumn season. The female fish ready to spawn migrate down the water column, keeping deeper than 600 m, where the males ready to spawn are concentrated. After spawning, they come back to the feeding areas of less water depths. The juvenile giant grenadier less than 30 cm in length can be encountered in the mesopaelagic and upper bathypelagic zones, which do not appear to form dense aggregations. The majority of the specimens less than 30–40 cm in length and smaller commonly leave this water column layer to occupy the bottom water layers along the continental shelf. Such differentiation between the juvenils and the sexually mature specimens can provide the opportunity to avoid cannibalism and to use the habitat food sources efficiently.</p>","PeriodicalId":48537,"journal":{"name":"Journal of Ichthyology","volume":"341 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2024-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140941223","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-05-14DOI: 10.1134/s0032945224010077
V. V. Panchenko, A. A. Matveev
Abstract—
It is shown that in Peter the Great Bay, the southern part of the range of the threaded sculpin Gymnocanthus pistilliger, its maximum size is larger than in the more northern waters off western Kamchatka. Reliable records of the species in trawl catches begin when individuals reach an absolute body length of 20 cm. Since males reach smaller sizes than females, their records, especially in the north, are less comprehensive. The growth rates of fish in Peter the Great Bay are higher, which is why the fish of the same age are larger here than in the waters off the Kamchatka Peninsula. The weight of individuals of the same size in the bay is also larger. The best growth rates in the area located to the south is determined by more favorable conditions of the aquatic environment. Despite the differences in growth rates, the maximum age of fish reached in populations is similar. The sex ratio with a predominance of females is also similar.
{"title":"Comparative Characteristics of the Size Parameters of the Threaded Sculpin Gymnocanthus pistilliger (Cottidae) in Peter the Great Bay (Sea of Japan) and off the Western Coast of Kamchatka (Sea of Okhotsk)","authors":"V. V. Panchenko, A. A. Matveev","doi":"10.1134/s0032945224010077","DOIUrl":"https://doi.org/10.1134/s0032945224010077","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">\u0000<b>Abstract</b>—</h3><p>It is shown that in Peter the Great Bay, the southern part of the range of the threaded sculpin <i>Gymnocanthus pistilliger</i>, its maximum size is larger than in the more northern waters off western Kamchatka<b>.</b> Reliable records of the species in trawl catches begin when individuals reach an absolute body length of 20 cm. Since males reach smaller sizes than females, their records, especially in the north, are less comprehensive. The growth rates of fish in Peter the Great Bay are higher, which is why the fish of the same age are larger here than in the waters off the Kamchatka Peninsula. The weight of individuals of the same size in the bay is also larger. The best growth rates in the area located to the south is determined by more favorable conditions of the aquatic environment. Despite the differences in growth rates, the maximum age of fish reached in populations is similar. The sex ratio with a predominance of females is also similar.</p>","PeriodicalId":48537,"journal":{"name":"Journal of Ichthyology","volume":"84 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2024-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140941219","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-05-14DOI: 10.1134/s0032945224020152
E. D. Vasil’eva, B. A. Levin, V. P. Vasil’ev
Abstract
Based on a comparative study of the variability of external morphological characters, color features, craniological and karyological characteristics of spined loaches of the genus Cobitis from the water bodies of the Colchis Lowland, analysis of data on the geological history of the region and zoogeographical data, it was concluded that the populations of the eastern Black Sea coast north of the Meskheti Ridge of the Lesser Caucasus belong to an independent species C. osurgeticus. It differs from C. satunini, which inhabits the water bodies of Adjara, in the structure of the karyotype, a number of proportions of the neurocranium and individual skull bones, a shorter caudal peduncle, and the position of the dorsal fin. The revealed phylogenetic proximity of the mitochondrial genes of the two species may be associated with diploid–polyploid relationships and interspecific hybridization in the genus Cobitis and suggests the need for further studies of the populations of the eastern coast of the Black Sea, including the spined loaches of Abkhazia, for which a hybrid origin via crossing with C. tanaitica cannot be preliminarily excluded. The neotype of C. osurgeticus is designated, and the species diagnosis is presented.
摘要根据对科尔奇斯低地水体中刺鳅属的外部形态特征、颜色特征、头盖骨和核型特征的变异性进行的比较研究，以及对该地区地质历史数据和动物地理数据的分析，得出结论认为，小高加索梅斯赫季海脊以北的黑海东部沿海种群属于一个独立的物种 C. osurgeticus。它与栖息在阿扎尔水体中的 C. satunini 的区别在于核型结构、神经颅骨和单个头骨的一些比例、较短的尾柄和背鳍的位置。所揭示的两个物种线粒体基因的系统发育近似性可能与钴炎属的二倍体-多倍体关系和种间杂交有关，并表明有必要对黑海东海岸的种群（包括阿布哈兹的刺鳅）进行进一步研究，因为不能初步排除与 C. tanaitica 杂交的杂交起源。指定了 C. osurgeticus 的新原型，并进行了物种诊断。
{"title":"Dynamics of Diversity of Spined Loaches of Genus Cobitis (Cobitidae) of Trans-Caucasus in the Anthropogenic Period According to the Data of Museum Collections. III. Morpho-genetic Variability, Taxonomic Status and Diagnostic Characters of Spined Loaches of the Black Sea Coast North of the Meskheti Ridge of the Lesser Caucasus","authors":"E. D. Vasil’eva, B. A. Levin, V. P. Vasil’ev","doi":"10.1134/s0032945224020152","DOIUrl":"https://doi.org/10.1134/s0032945224020152","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Based on a comparative study of the variability of external morphological characters, color features, craniological and karyological characteristics of spined loaches of the genus <i>Cobitis</i> from the water bodies of the Colchis Lowland, analysis of data on the geological history of the region and zoogeographical data, it was concluded that the populations of the eastern Black Sea coast north of the Meskheti Ridge of the Lesser Caucasus belong to an independent species <i>C. osurgeticus</i>. It differs from <i>C. satunini</i>, which inhabits the water bodies of Adjara, in the structure of the karyotype, a number of proportions of the neurocranium and individual skull bones, a shorter caudal peduncle, and the position of the dorsal fin. The revealed phylogenetic proximity of the mitochondrial genes of the two species may be associated with diploid–polyploid relationships and interspecific hybridization in the genus <i>Cobitis</i> and suggests the need for further studies of the populations of the eastern coast of the Black Sea, including the spined loaches of Abkhazia, for which a hybrid origin via crossing with <i>C. tanaitica</i> cannot be preliminarily excluded. The neotype of <i>C. osurgeticus</i> is designated, and the species diagnosis is presented.</p>","PeriodicalId":48537,"journal":{"name":"Journal of Ichthyology","volume":"46 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2024-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140941221","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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