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50 results for “Carassius”
FIGURE 5 in Differential expression of HPG-axis genes in autotetraploids derived from red crucian carp Carassius auratus red var., × blunt snout bream Megalobrama amblycephala,
FIGURE 5 Mean (+SD) relative expression of gnrh2, fshb, lhb, fshr and lhr messenger (m)RNA in (a) the breeding season () 2n, and () 4n and (b) the non-breeding season in Carassius auratus red var. () 2n, and () 4n. (RCC,) and autotetraploid C. auratus red var. ♀ × Megalobrama amblycephala ♂ (4nRR,). T, gene detected in the testis; O, gene detected in the ovary. *, significant difference between RCC and 4nRR (P <0.05)
FIGURE 4 Deduced amino-acid sequences for the Gnrh2 in Differential expression of HPG-axis genes in autotetraploids derived from red crucian carp Carassius auratus red var., × blunt snout bream Megalobrama amblycephala,
FIGURE 4 Deduced amino-acid sequences for the Gnrh2 () and Lhr () genes in Carassius auratus red var. (RCC) and autotetraploid C. auratus red var. ♀ × Megalobrama amblycephala ♂ (4nRR)
FIGURE 2 in Differential expression of HPG-axis genes in autotetraploids derived from red crucian carp Carassius auratus red var., × blunt snout bream Megalobrama amblycephala,
FIGURE 2 (a) The mature eggs (scale bar = 100 μm) and (b) mature sperm (scale bar = 10 μm) of autotetraploid Carrasius auratus red var. ♀ x Megalobrama amblycephala ♂ (4nRR)
FIGURE 3 in Differential expression of HPG-axis genes in autotetraploids derived from red crucian carp Carassius auratus red var., × blunt snout bream Megalobrama amblycephala,
FIGURE 3 Reverse-transcription (RT)-PCR analysis of the expression of (a) gnrh2, (b) fshb, (c) lhb, (d) fshr and (e) lhr messenger (m)RNA in various tissues of autotetraploid Carrasius auratus red var. ♀ x Megalobrama amblycephala ♂ (4nRR). The upper strip of each panel (a)–(e) shows the positive control of actin gene while the lower strip of each panel shows the RT-PCR amplification of the target gene
FIGURE 1 in Differential expression of HPG-axis genes in autotetraploids derived from red crucian carp Carassius auratus red var., × blunt snout bream Megalobrama amblycephala,
FIGURE 1 The gonadal structure of Carassius auratus red var. [RCC; (a)–(c)] and autotetraploids C. auratus red var. ♀ × Megalobrama amblycephala ♂ [4nRR; (d)–(f)]: (a) ovary of 7 month-old RCC containing many phase II and a few phase III oocytes; (b) ovary of 12 month-old RCC showing many mature phase IV ova; (c) testis of 12 month-old RCC with numerous mature sperms () and a small amount of spermatocytes () in the lobules of testes; (d) ovary of 7 month-old 4nRR containing phase II and a few phase III oocytes; (e) ovary of 12 month-old 4nRR with numerous mature phase IV ova; (f) testis of 12 month-old 4nRR with numerous mature sperms () and a small amount of spermatocytes () in the lobules of testes, the scale bars: (a), (b), (d), and (e) = 100 μm; (c) and (f) = 10 μm
Fig. 4 in Scale-Morphometry Study To Discriminate Gibel Carp (Carassius Gibelio) Populations In The Balaton-Catchment (Hungary)
Fig. 4. Relationship between Canonical Variates and environmental variables based on sampling sites separation
Fig. 2 in Scale-Morphometry Study To Discriminate Gibel Carp (Carassius Gibelio) Populations In The Balaton-Catchment (Hungary)
Fig. 2. Landmarks used to define the shape of the scales (Prussian carp). The areas of the scales are described with respect to the fish position
Fig. 3 in Scale-Morphometry Study To Discriminate Gibel Carp (Carassius Gibelio) Populations In The Balaton-Catchment (Hungary)
Fig. 3. Canonical Variate Analysis of Carassius gibelio from KBWPS I, KBWPS II, Balaton, Nagyberek, Hungary with landmark-based geometric geometric morphometrics based on scale shape. El-
Fig. 1 in Modified Method Of Metaphase Plates Obtaining For Polyploid Fish Genera Carassius And Cobitis Karyotyping (Actinopterygii, Cypriniformes)
Fig. 1. Mitotiс mеtaphases and karyograms of studied fish species: А — C. taenia; В — C. auratus; С — C. carassius. A b b r e v i a t i o n s i n d i c a t e: m — metacentric; sm — submetacentric; sta — subtelo- and acrocentric chromosomes.
Distance estimation in the Goldfish (Carassius auratus)
<p>Neurophysiological advances have given us exciting insights into the systems responsible for spatial mapping in mammals. However, we are still lacking information on the evolution of these systems and whether the underlying mechanisms identified are universal across phyla, or specific to the species studied. Here we address these questions by exploring whether a species that is evolutionarily distant from mammals can perform a task central to mammalian spatial mapping – distance estimation. We developed a behavioural paradigm allowing us to test whether goldfish (<em>Carassius</em> <em>auratus</em>) can estimate distance and explored the behavioural mechanisms that underpin this ability. Fish were trained to swim a set distance within a narrow tank covered with striped pattern. After changing the background pattern, we found that goldfish use the spatial frequency of their visual environment to estimate distance; doubling the spatial frequency of the background pattern resulted in a large overestimation of the swimming distance. These results provide robust evidence that goldfish can accurately estimate distance, and show that they use local optic flow to do so. These results provide a compelling basis to utilise goldfish as a model system to interrogate the evolution of the mechanisms that underpin spatial cognition, from brain to behaviour.</p>
Fig.2 in Hematological Indices Of The Prussian Carp (Carassius Gibelio (Bloch, 1782)) From The Zaporizhian (Dnipro) Reservoir
Fig.2. Erythrocytes of the Prussian carp (standard norm): A- lower section of the reservoir; B- the Samara Bay.
Text-fig. 6. Fish remains from Volchaya Balka locality (Late Miocene, North Caucasus). a – Scardinius sp., SSC-RAS G-2/1, pharyngeal tooth of the first row, side view, occlusal view; b – Abramis cf. bjoerkna, SSC-RAS G-2/2, pharyngeal tooth of the first row: top – side view, bottom – occlusal view; c – Carassius sp., SSC-RAS G-2/3, pharyngeal tooth of the first row: top – side view, bottom – occlusal view; d – Alburnus sp., SSC-RAS G-2/4, fragment of pharyngeal bone (os pharyngicus inferius), medial view; e – Acipenser sp., SSC-RAS G-2/5, left hyomandibular: left – medial view, right – proximal view; f – Gobiidae gen. indet., SSC-RAS G-2/6, tail vertebra: left – lateral view, right – dorsal view; g – Gobiidae gen. indet., SSC-RAS G-2/7, dentary: top – medial view, bottom – dorsal view. in Late Miocene (Early Turolian) Vertebrate Faunas And Associated Biotic Record Of The Northern Caucasus: Geology, Taxonomy, Palaeoenvironment, Biochronology
Text-fig. 6. Fish remains from Volchaya Balka locality (Late Miocene, North Caucasus). a – Scardinius sp., SSC-RAS G-2/1, pharyngeal tooth of the first row, side view, occlusal view; b – Abramis cf. bjoerkna, SSC-RAS G-2/2, pharyngeal tooth of the first row: top – side view, bottom – occlusal view; c – Carassius sp., SSC-RAS G-2/3, pharyngeal tooth of the first row: top – side view, bottom – occlusal view; d – Alburnus sp., SSC-RAS G-2/4, fragment of pharyngeal bone (os pharyngicus inferius), medial view; e – Acipenser sp., SSC-RAS G-2/5, left hyomandibular: left – medial view, right – proximal view; f – Gobiidae gen. indet., SSC-RAS G-2/6, tail vertebra: left – lateral view, right – dorsal view; g – Gobiidae gen. indet., SSC-RAS G-2/7, dentary: top – medial view, bottom – dorsal view.
Distance estimation in the Goldfish (Carassius auratus)
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Fig. 1 in Scale-Morphometry Study To Discriminate Gibel Carp (Carassius Gibelio) Populations In The Balaton-Catchment (Hungary)
Fig. 1. Overlooking map of sampling areas
Fig. 2 in Breeding Potential Of Adventitious Species Of Carassius Auratus And Carassius Gibelio (Cypriniformes, Cyprinidae) In Water Bodies Of Ukraine
Fig. 2. Percentage ratio of hard roe and body weight of C. auratus and C. gibelio females.
Fig. 1 in Breeding Potential Of Adventitious Species Of Carassius Auratus And Carassius Gibelio (Cypriniformes, Cyprinidae) In Water Bodies Of Ukraine
Fig. 1. Individual fecundity of C. auratus and C. gibelio females in age groups.
Figure. Location of the Beyşehir and Eğirdir lakes in Türkiye. in Health risk assessments of heavy metal concentrations via consumption of an invasive species, Carassius gibelio, from two large freshwater lakes of Türkiye
Figure. Location of the Beyşehir and Eğirdir lakes in Türkiye.
Data for: Visualization of the hidden food sources of bass (Micropterus salmoides), crucian carp (Carassius carassius), and minnow (Zacco platypus) using 18S rRNA V9 primers on urban Singal Reservoir in Korea
<p>Fish are the most important consumers in aquatic ecosystems, and the analysis of fish prey is very important for understanding their short-term feeding characteristics and the connectivity of food webs. In this study, DNA metabarcoding was used to identify the prey of the native fish species, <em>Zacco platypus</em> (the pale chub) and <em>Carassius carassius</em>, and an introduced species, <em>Micropterus salmoides</em>, in domestic lentic ecosystems. Prey community composition, selectivity index, prey diversity, and trophic level analyses were performed. The prey composition ratio analysis showed that in August 2020, 85.8% of <em>M. salmoides</em>' prey was fish from the orders Cypriniformes and Perciformes, and in July 2021, 100% of <em>M. salmoides</em>' prey was zooplankton from the orders Anomopoda and Calanoida. Zooplankton was the main prey of <em>Z. platypus</em> collected in August 2020 (69.5%) and <em>C. carassius</em> collected in July 2021 (88.9%). The selectivity index analysis showed that the preferred prey of M. salmoides was fish from the order Cypriniformes, the preferred prey of <em>Z. platypus</em> was phytoplankton from the division Bacillariophyta, and the preferred prey of <em>C. carassius</em> was zooplankton from the order Cladocera. For the prey width analysis, <em>C. carassius</em> had the highest BI index value (0.8), followed by <em>Z. platypus</em> (0.29), while <em>M. salmoides</em> had BI index values of 0.09, 0.19, and 0.001, indicating low prey width. These results provide fundamental data on the utility of DNA metabarcoding for dietary studies of major fish species in lentic ecosystems and for analyzing food web connectivity based on major prey items.</p>
Data for: Visualization of the hidden food sources of bass (Micropterus salmoides), crucian carp (Carassius carassius), and minnow (Zacco platypus) using 18S rRNA V9 primers on urban Singal Reservoir in Korea
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Data from: Intraspecific scaling of the resting and maximum metabolic rates of the crucian carp (Carassius auratus)
The question of how the scaling of metabolic rate with body mass (M) is achieved in animals is unresolved. Here, we tested the cell metabolism hypothesis and the organ size hypothesis by assessing the mass scaling of the resting metabolic rate (RMR), maximum metabolic rate (MMR), erythrocyte size, and the masses of metabolically active organs in the crucian carp (Carassius auratus). The M of the crucian carp ranged from 4.5 to 323.9 g, representing an approximately 72-fold difference. The RMR and MMR increased with M according to the allometric equations RMR = 0.212M0.776 and MMR = 0.753M0.785. The scaling exponents for RMR (br) and MMR (bm) obtained in crucian carp were close to each other. Thus, the factorial aerobic scope remained almost constant with increasing M. Although erythrocyte size was negatively correlated with both mass-specific RMR and absolute RMR adjusted to M, it and all other hematological parameters showed no significant relationship with M. These data demonstrate that the cell metabolism hypothesis does not describe metabolic scaling in the crucian carp, suggesting that erythrocyte size may not represent the general size of other cell types in this fish and the metabolic activity of cells may decrease as fish grows. The mass scaling exponents of active organs was lower than 1 while that of inactive organs was greater than 1, which suggests that the mass scaling of the RMR can be partly due to variance in the proportion of active/inactive organs in crucian carp. Furthermore, our results provide additional evidence supporting the correlation between locomotor capacity and metabolic scaling.
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