Journal of Ichthyology最新文献

{"title":"Size, Shape, Numbers and Composition of Fish Schools","authors":"A. O. Kasumyan, D. S. Pavlov","doi":"10.1134/s0032945223070032","DOIUrl":"https://doi.org/10.1134/s0032945223070032","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Data on the size and shape of fish schools, number, size, and species composition of individuals included in them have been considered. The largest schools, numbering up to hundreds of thousands of individuals or more, are formed by mass marine pelagic fish. The shape of fish schools of the same species is extremely diverse and changes rapidly, depending on the age and size of the fish, their mobility, condition, and other features. The classification of schools has been given—migrating (polarized), feeding, spherical (globular) and others. Schools can become denser or sparse, change the depth of swimming, break up and joint with neighboring ones. The variability of the linear sizes of fish schools and the number of individuals included in them reflects the high plasticity of schooling behavior and its susceptibility to the influence of various factors. Schools are characterized by high homogeneity of the species and size composition of fish and the absence of individual differences in fish. In some cases, schools may consist predominantly of female or male fish. Uniformity is the most important characteristic of fish schools and indicates assortativeness when fish unite into schools. The greatest homogeneity is characteristic of migrating schools of pelagic fish. Multi-species schools are most often formed by juvenile fish.</p>","PeriodicalId":48537,"journal":{"name":"Journal of Ichthyology","volume":"51 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138689738","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}

{"title":"Some Data on Morphology of Antlered Sculpin Enophrys diceraus (Cottidae) from Taui Bay, Sea of Okhotsk","authors":"E. A. Poezzhalova-Chegodaeva","doi":"10.1134/s0032945223050089","DOIUrl":"https://doi.org/10.1134/s0032945223050089","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Plastic and meristic traits, arrangement of teeth attached to jaw bones, and coloration in the antlered sculpin from Taui Bay, Sea of Okhotsk are considered. The data on allometric variability in plastic traits of this species are first reported. It has been proven that the most traits antlered sculpin are susceptible to variation in positive allometry (head proportions and fin sizes), while negative allometry can be observed only in several traits (the head length, the length of upper preopercular spine, and the maximum height of occipital ridge). A range of traits unsuscepyible to allometry of orbit diameter, distance from the orbit posterior edge and the occipital ridge posterior edge, predorsal distance, base length of pectoral fin, and length of caudal peduncle are revealed. The significant taxonomic traits including length of upper preopercular spine, interorbital width, and form and arrangement of lacrimale outgrowths are identified.</p>","PeriodicalId":48537,"journal":{"name":"Journal of Ichthyology","volume":"92 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138629936","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}

{"title":"On Widening the Hybrid Zone for Chars of Genus Salvelinus, Kundscha S. leucomaenis and Northern Dolly Varden S. malma (Salmonidae), in Rivers of Kamchatka Peninsula","authors":"K. V. Kuzishchin, M. A. Gruzdeva, A. V. Semenova","doi":"10.1134/s0032945223060085","DOIUrl":"https://doi.org/10.1134/s0032945223060085","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">\u0000<b>Abstract</b>—</h3><p>The data on widening the zone for hybridization between the chars of the genus <i>Salvelinus</i>, kundscha <i>S. leucomaenis</i> and northern dolly varden <i>S. malma</i> (Salmonidae), in rivers of the Kamchatka Peninsula are reported. If the hybrids between the kundscha and the northern dolly varden could be previously observed only in the Utkholok River in the northwest of the peninsula, the mass hybridization between these species have occurred in two more nearby rivers, the Kvachina and Snatolveem Rivers since 2009. A microsatellite analysis has shown that hybrid specimens are characterized by intermediate values for allelic diversity, when compared to that in the representatives of parental species, while the mean expected heterozygosity values for hybrids are higher than that in Dolly Varden and kundscha fish. The analysis results for maternal inheritance in hybrid specimens from the Kvachina River coincide with that obtained in the surveys previously performed in the Utkholok River. Thus, the same haplotype specific for the kundscha fish was revealed in all the hybrid specimens, which can indicate that the hybrids originate from kundscha females and Dolly Varden males. The appearance and coloration of kundscha × northern dolly varden hybrids in the Kvachina and Snatolveem Rivers are similar to that in the specimens in the Utkholok River. Rather similar chacteristics of hybrid specimens in all three rivers can give reason to consider that a mechanism of their occurrence in the Kvachina and Snatolveem Rivers is simalr to that in the Utkholok River, since the kundscha eggs are inseminated by the Dolly Varden dwarf males. The increased local biological production of rivers due to increased sizes of spawning stocks of pink salmon <i>Oncorhynchus</i> <i>gorbuscha</i> along with large-scale climate changes in the North Pacific are considered as a possible cause of disturbances of isolation between species. It is quite probable that these two factors have contributed to improving the environmental conditions for fattening the Dolly Varden fish in the freshwater phase of their life cycle and, as a resultl of this process, increasing the number of Dolly Varden male fish matuaring in the river.</p>","PeriodicalId":48537,"journal":{"name":"Journal of Ichthyology","volume":"40 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138629935","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}

{"title":"Diurnal Rhythm of Schooling Behavior of Fish","authors":"A. Kasumyan, D. S. Pavlov","doi":"10.1134/s003294522307007x","DOIUrl":"https://doi.org/10.1134/s003294522307007x","url":null,"abstract":"","PeriodicalId":48537,"journal":{"name":"Journal of Ichthyology","volume":"429 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138991197","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}

{"title":"Schooling Behavior and Feeding of Fish","authors":"A. Kasumyan, D. S. Pavlov","doi":"10.1134/s003294522307010x","DOIUrl":"https://doi.org/10.1134/s003294522307010x","url":null,"abstract":"","PeriodicalId":48537,"journal":{"name":"Journal of Ichthyology","volume":"44 5","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139023061","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}

{"title":"Influence of Environmental Factors and the Condition of Fish on Schooling Behavior","authors":"A. Kasumyan, D. S. Pavlov","doi":"10.1134/s0032945223070123","DOIUrl":"https://doi.org/10.1134/s0032945223070123","url":null,"abstract":"","PeriodicalId":48537,"journal":{"name":"Journal of Ichthyology","volume":"275 ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139013402","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}

{"title":"Protective Function of a Fish School","authors":"A. Kasumyan, D. S. Pavlov","doi":"10.1134/s0032945223070093","DOIUrl":"https://doi.org/10.1134/s0032945223070093","url":null,"abstract":"","PeriodicalId":48537,"journal":{"name":"Journal of Ichthyology","volume":"298 ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139021245","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}

{"title":"Notes on Hermaphroditism in the Baltic Herring Clupea harengus membras (Clupeidae) in the Gulf of Finland","authors":"A. F. Kuznetsov","doi":"10.1134/s0032945223060097","DOIUrl":"https://doi.org/10.1134/s0032945223060097","url":null,"abstract":"","PeriodicalId":48537,"journal":{"name":"Journal of Ichthyology","volume":"769 ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139020607","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}

{"title":"Internal Structure of a Fish School","authors":"A. Kasumyan, D. S. Pavlov","doi":"10.1134/s0032945223070044","DOIUrl":"https://doi.org/10.1134/s0032945223070044","url":null,"abstract":"","PeriodicalId":48537,"journal":{"name":"Journal of Ichthyology","volume":"119 ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139016543","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}

{"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. II. Morphokaryological Variation, Taxonomic Status, and Diagnostic Characteristics of Adjaran Spined Loaches","authors":"E. D. Vasil’eva, V. Vasil'ev","doi":"10.1134/s0032945223060164","DOIUrl":"https://doi.org/10.1134/s0032945223060164","url":null,"abstract":"","PeriodicalId":48537,"journal":{"name":"Journal of Ichthyology","volume":"812 ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139022696","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}