Erythrocyte morphometry in teleost fish-Species-specific, inter-individual and environmental-related differences

2020 ◽  
Author(s):  
Franz Lahnsteiner
Keyword(s):  
Fish Species ◽  
Teleost Fish ◽  
Species Specific

MicroRNAs mediated environmental stress responses and toxicity signs in teleost fish species

Aquaculture ◽  
2021 ◽  
pp. 737310
Author(s):  
Sayed HaidarAbbas Raz ◽  
Sameh A. Abdelnour ◽  
Mashael Alhumaidi Alotaibi ◽  
Qwiat AlGabbani ◽  
Mohammed A.E. Naiel ◽  
...  
Keyword(s):  
Environmental Stress ◽  
Fish Species ◽  
Stress Responses ◽  
Teleost Fish

​Discrimination of Five Gobid Species (Family: Gobiidae) based on Otolith Morphometry

2021 ◽  
Author(s):  
Vikas Pathak ◽  
Rinchen N. Bhutia ◽  
Shashi Bhushan ◽  
Geetanjali Deshmukhe ◽  
A.K. Jaiswar
Keyword(s):  
Fish Species ◽  
Discriminant Function Analysis ◽  
Function Analysis ◽  
Allometric Growth ◽  
Fish Size ◽  
Sagittal Otolith ◽  
Shape Indices ◽  
Glossogobius Giuris ◽  
Species Specific ◽  
Boleophthalmus Dussumieri

Background: The fishes of family Gobiidae are one of the least studied fishes, especially for otolith structure. The otoliths were possess species specific features. Hence, traits of sagittal otolith of gobid species studied. Methods: Five gobid species Odontamblyopus roseus (Valenciennes, 1837), Trypauchen vagina (Bloch and Schneider, 1801), Glossogobius giuris (Hamilton, 1822), Parachaeturichthys polynema (Bleeker, 1853) and Boleophthalmus dussumieri (Valenciennes, 1837) were investigated by three methods including morphological, shape indices and step wise discriminant function analysis (SDFA). Result: Interrelationship between shape indices investigated, at 95% level of confidence (P less than 0.05), revealed that perimeter of P. polynema and area of T. vagina have isometric growth with their length (b = 3.0071, 2.90, respectively) and otolith area of B. dussumieri have positive allometric growth (b = 4.23077). SDFA, based on otolith morphometry, discriminated species up with 97.18% accuracy. Hence, the results of present investigation can be used for discrimination of the species and as a tool in predicting fish size from the otoliths and in calculating the biomass of these less studied fish species.

scholarly journals Individual Serum Triiodothyronine and Thyroxine Levels in Seven Freshwater Fish Species

2021 ◽  
Vol 23 (1) ◽  
pp. 59-66
Author(s):  
Alexander Atanasoff ◽  
Dimitrinka Zapryanova ◽  
Cigdem Urku ◽  
Galin Nikolov
Keyword(s):  
Serum Concentration ◽  
Thyroid Hormones ◽  
Fresh Water ◽  
Fish Species ◽  
Reference Intervals ◽  
Specific Reference ◽  
Fresh Water Fish ◽  
Water Fish ◽  
Total Thyroxine ◽  
Species Specific

Abstract The thyroid hormones (THs) play an important role in the regulation of the rate of metabolism, affect the growth and function of different systems in the organism. The aim of this study was to assess serum concentration of total triiodothyronine (T3), total thyroxine (T4) as well as T3/T4 ratio in serum from healthy fresh water fish from Salmonidae, Acipenseridae, Cyprinidae, and Clariidae families to determine species-specific reference intervals. Mean concentrations of T3 and T4 levels varied significantly among fish. Finally, the test results show clear differences in the serum concentration of the T3 and T4 and give new insight into the thyroid hormones reference values in some commercial fresh water fish species.

scholarly journals Vertebrate Alpha2,8-Sialyltransferases (ST8Sia): A Teleost Perspective

2020 ◽  
Vol 21 (2) ◽  
pp. 513 ◽  
Author(s):  
Marzia Tindara Venuto ◽  
Mathieu Decloquement ◽  
Joan Martorell Ribera ◽  
Maxence Noel ◽  
Alexander Rebl ◽  
...  
Keyword(s):  
Fish Species ◽  
Evolutionary History ◽  
Recombinant Enzymes ◽  
Sequence Alignments ◽  
Multiple Sequence ◽  
Multiple Sequence Alignments ◽  
Functional Studies ◽  
Genome Duplications ◽  
History Of ◽  
Species Specific

We identified and analyzed α2,8-sialyltransferases sequences among 71 ray-finned fish species to provide the first comprehensive view of the Teleost ST8Sia repertoire. This repertoire expanded over the course of Vertebrate evolution and was primarily shaped by the whole genome events R1 and R2, but not by the Teleost-specific R3. We showed that duplicated st8sia genes like st8sia7, st8sia8, and st8sia9 have disappeared from Tetrapods, whereas their orthologues were maintained in Teleosts. Furthermore, several fish species specific genome duplications account for the presence of multiple poly-α2,8-sialyltransferases in the Salmonidae (ST8Sia II-r1 and ST8Sia II-r2) and in Cyprinus carpio (ST8Sia IV-r1 and ST8Sia IV-r2). Paralogy and synteny analyses provided more relevant and solid information that enabled us to reconstruct the evolutionary history of st8sia genes in fish genomes. Our data also indicated that, while the mammalian ST8Sia family is comprised of six subfamilies forming di-, oligo-, or polymers of α2,8-linked sialic acids, the fish ST8Sia family, amounting to a total of 10 genes in fish, appears to be much more diverse and shows a patchy distribution among fish species. A focus on Salmonidae showed that (i) the two copies of st8sia2 genes have overall contrasted tissue-specific expressions, with noticeable changes when compared with human co-orthologue, and that (ii) st8sia4 is weakly expressed. Multiple sequence alignments enabled us to detect changes in the conserved polysialyltransferase domain (PSTD) of the fish sequences that could account for variable enzymatic activities. These data provide the bases for further functional studies using recombinant enzymes.

scholarly journals Seascape context modifies how fish respond to restored oyster reef structures

2019 ◽  
Vol 76 (4) ◽  
pp. 1131-1139 ◽  
Author(s):  
Ben L Gilby ◽  
Andrew D Olds ◽  
Christopher J Henderson ◽  
Nicholas L Ortodossi ◽  
Rod M Connolly ◽  
...  
Keyword(s):  
Species Richness ◽  
Fish Species ◽  
Fish Assemblages ◽  
Oyster Reef ◽  
Pivotal Role ◽  
Oyster Reefs ◽  
Total Abundance ◽  
Fish Recruitment ◽  
Abundance And Diversity ◽  
Species Specific

Abstract The seascape context of coastal ecosystems plays a pivotal role in shaping patterns in fish recruitment, abundance, and diversity. It might also be a principal determinant in structuring the recruitment of fish assemblages to restored habitats, but the trajectories of these relationships require further testing. In this study, we surveyed fish assemblages from 14 restored oyster reefs and 14 control sites in the Noosa River, Queensland, Australia, that differed in the presence or absence of seagrass within 500 m, over four periods using baited cameras. Fish assemblages at oyster reefs differed from those at control sites, with higher species richness (1.4 times) and more individuals of taxa that are harvested by fishers (1.8 times). The presence or absence of seagrass nearby affected the abundance of a key harvestable fish species (yellowfin bream Acanthopagrus australis) on oyster reefs, but not the overall composition of fish assemblages, species richness, or the total abundance of harvestable fishes overall. These findings highlight the importance of considering species-specific patterns in seascape utilization when selecting restoration sites and setting restoration goals, and suggest that the effects of restoration on fish assemblages might be optimized by focusing efforts in prime positions in coastal seascapes.

Rapid Fish Species Identification by Agarose Gel Isoelectric Focusing of Sarcoplasmic Proteins

1981 ◽  
Vol 64 (1) ◽  
pp. 38-43
Author(s):  
Ronald C Lundstrom
Keyword(s):  
Species Identification ◽  
Isoelectric Focusing ◽  
Fish Species ◽  
Protein Pattern ◽  
Agarose Gel ◽  
Tissue Fluid ◽  
Protein Patterns ◽  
Fish Species Identification ◽  
Species Specific ◽  
Gel Isoelectric Focusing

Abstract A rapid method is described for fish species identification by agarose gel isoelectric focusing (AGIEF). The AGIEF method can be completed in less than 2 h and gives reproducible species-specific sarcoplasmic protein patterns. Protein patterns are similar using either centrifuged tissue fluid or muscle tissue as the sample. One species, monkfish (Lophius americanus), has a polymorphic protein pattern. A predominant pattern was found in 66.7% of the individuals; 2 variant patterns were equally distributed among the remaining 33.3%. AGIEF offers a more rapid, less expensive alternative to the current AOAC official first action method for fish species identification based on polyacrylamide gel isoelectric focusing.

scholarly journals Hormonal Regulation of Fish Adaptation to Atypical Fluctuations in Temperature and Oxygen Regime of a Water Body

2019 ◽  
Vol 7 (2) ◽  
pp. 1
Author(s):  
Oleksandr Potrokhov ◽  
Oleg Zinkovskyi ◽  
Mykola Prychepa ◽  
Yurii Khudiiash
Keyword(s):  
Water Temperature ◽  
Oxygen Concentration ◽  
Fish Species ◽  
Hormonal Regulation ◽  
High Water ◽  
Fish Growth ◽  
Increase Water Temperature ◽  
Growth And Change ◽  
Species Specific ◽  
Increased Activity

Recently, the water temperature significantly exceeded the climatic norms for the studied region of Ukraine. Water is heated to 30ºC with a decrease in the concentration of dissolved oxygen in shallow water. In this connection, the change in the hormone content in the blood plasma of carp, roach, rudd, perch and ruff in response to these factors has been studied. Most of the fish species studied in June respond by increasing the cortisol content in the blood by 1.2–3.3 times to an increase in water temperature. Fish quite successfully adapts after a month's stay in conditions of high water temperature to 31ºC, and the level of cortisol is reduced. The content of thyroid hormones in the blood of the rudd, roach and ruff is quite high and after a month of adaptation to the existing factors. This indicates an increased activity in their metabolic processes. The content of somatotropin and prolactin in the blood of the studied fish species decreases 2.4–5.0 and 1.9–7.7 times, respectively, in response to an increase in temperature and a decrease in the oxygen concentration in water. This should lead to a decrease in the rate of fish growth and change in the activity of osmotic exchange. However, hormonal reactions are species-specific in nature to the existing factors. Perch and roach are less plastic to increase water temperature. Carp most favorably tolerates an increase in water temperature and a decrease in oxygen concentration.

scholarly journals Nitrite toxicity assessment in Danio rerio and Poecilia reticulata

2011 ◽  
Vol 80 (3) ◽  
pp. 309-312 ◽  
Author(s):  
Petra Doleželová ◽  
Stanislava Mácová ◽  
Vladimíra Pištěková ◽  
Zdeňka Svobodová ◽  
Iveta Bedáňová ◽  
...  
Keyword(s):  
Acute Toxicity ◽  
Fish Species ◽  
Danio Rerio ◽  
Poecilia Reticulata ◽  
Toxicity Assessment ◽  
Model Organisms ◽  
Toxicity Tests ◽  
Uptake Mechanism ◽  
Significant Difference ◽  
Species Specific

Nitrite is a natural component of the nitrogen cycle in the environment. Although it usually occurs in low concentrations, elevated concentrations caused by effluents or affected nitrification process can lead to serious health deterioration of fish. Two aquarium fish zebrafish (Danio rerio) and guppy (Poecilia reticulata) are recommended to use as model organisms in toxicity tests. However, their sensitivity to nitrite can differ. The aim of this study was to define acute toxicity of nitrite by the semistatic method according to OECD No. 203 (Fish, Acute toxicity test). The series of 4 acute toxicity tests was performed, with 10 fish of both species used for each concentration and for the control. The 96hLC50 NO2- value for D. rerio and P. reticulata was 242.55 ± 15.79 mg·l-1 and 30.2 ± 8.74 mg·l-1, respectively. We have proved significant difference (p < 0.05) in sensitivity between D. rerio and P. reticulata. The results showed different sensitivities to nitrites in tested fish species, which could be related to species-specific branchial chloride uptake mechanism. This is the first study on this fish species.

scholarly journals Comparative studies on the adaptive renal structures of some teleost fish species inhabiting different habitats.

2015 ◽  
Vol 1 (6) ◽  
pp. 256-265
Author(s):  
Zeinab M. El–Gohary ◽  
Manal M. Ramadan ◽  
Souad, A. Khalifa ◽  
Tasneem, R. Ebraheem
Keyword(s):  
Fish Species ◽  
Teleost Fish ◽  
Comparative Studies
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