Two types of testicular tumor were evident in cyprinid fishes collected from Lake Ontario. Both types of tumors appeared to be of Sertoli cell origin. One contained predominantly Sertoli cells with little or no lipid content and germinal cells in only small numbers. The second contained large numbers of spermatogonia together with Sertoli cells that contained large amounts of lipid and smooth e...

Four species of Devario are recorded from Bangladesh: D. aequipinnatus, D. anomalus, D. coxi, new species, and D. devario. Devario aequipinnatus has a wide distribution in northern India and Bangladesh. Devario coxi, from southeastern Bangladesh near Cox's Bazar, differs from D. aequipinnatus in mtDNA (COI, p-distance 1.8%), colouration, proportional measurements, and meristics. The minor morph...

The metabolic-level boundaries (MLB) hypothesis and the cell metabolism (CM) hypothesis have been proposed to explain the body mass scaling of metabolic rate. The MLB hypothesis focuses mainly on the influence of the metabolic level on the relative importance of volume and surface area constraints. The CM hypothesis focuses on the variation of cell size as the body grows. The surface area to vo...

The paper studies fish population of an isolated lake in the subarctic zone. study features distribution fish, assessment their abundance and size structure were carried out by echometric method using hydroacoustic complexes geoinformation systems. research found that is represented 4 species fish: roach, perch, pike peled, with absolute dominance cyprinids. Their share total number reservoir w...

The study was aimed to update the knowledge on fish landings of inland fisheries in Basrah province, Iraq. species composition, and total landings, their trends six landing sites throughout region were evaluated during year 2020-2021. Species compositions included seven cyprinids’ species, three cichlids’ mullet’s two from sparids silurids. exotic C. carpio, tilapias auratus dominated constitut...

Fish farming in Serbia takes place cyprinid (carp) and salmonid (trout) fish farms that together account for over 95% of the total produced. Cyprinids are grown warm water farms, cold designed trout. The great majority (97%) located Vojvodina, Serbia?s northern province. This paper examines how traditional carp sector was developed during recent 20- year period paying particular attention to co...

Introduced fish are a widespread ecological threat in originally fishless high mountain lakes. However, basic distribution data largely missing for most regions. Using time-consuming standard methods (e.g. Nordic fishing nets) to assess and relative densities at relevant spatial scale can be impracticable, because of the large number To overcome this problem, alternative rapid monitoring would ...

Background: Goldfishes are used as an ideal model for nutritional studies in larval and juvenile cyprinids. However, of the limited published data that is available on goldfish, protein requirements have varied from 29% to 53% goldfish larvae. So present study was undertaken determine growth performance C. auratus fed with different dietary lipid levels develop nutritionally balanced diets. Met...