Differential inhibition of digestive proteases by tannin in two size groups of rohu ( Labeo rohita, Hamilton): A biochemical and zymography study

2018 ◽  
Vol 50 (2) ◽  
pp. 449-456
Author(s):  
Sandipan Talukdar ◽  
Koushik Ghosh
Keyword(s):  
Labeo Rohita ◽  
Differential Inhibition ◽  
Digestive Proteases ◽  
Size Groups

scholarly journals Status, occurrence, intensity and impact of Argulosis in different brood stock ponds

2019 ◽  
Vol 4 (5) ◽  
Author(s):  
M Aminur Rahman ◽  
M Zahangir Alom ◽  
Mt Shamima Yeasmin ◽  
Saleha Khan
Keyword(s):  
Labeo Rohita ◽  
Secondary Infection ◽  
Skin Lesions ◽  
Infected Fish ◽  
Physical Injury ◽  
Brood Stock ◽  
Lower Growth ◽  
In Captivity ◽  
Size Groups ◽  
Production Losses

Fish lice belonging to the genus Argulus, is a hazardous ectoparasite for the hatchery farmers. In order to understand the occurrence, intensity and impact of Argulosis on carp fishes, the present study was conducted in three Fish Seed Multiplication Farms (Hatcheries), such as Kashipur Farm, Gouranadi Farm and Ujirpur Farm at Barisal District, Bangladesh from November 2012 to April 2013. Highest infestation (79.17%) and intensity (41.34 per fish) of Argulus sp. were found in Ujirpur Hatchery, followed by those in Gouranadi (37.41% and 13.17 per fish) and Kashipur (17.11% and 10.91 per fish). Species-wise highest infestation (65.71%) and intensity (25.86 per fish) were found in Labeo rohita, followed by Cyprinus carpio (60.00% and 12.00 per fish) and the lowest in Cirrhinus mrigala (38.61% and 5.02 per fish). Sex-wise infestation and intensity of Argulus sp. were always higher in the female carps than male and in all ponds L. rohita had the highest rate of infestation than those in C. carpio and C. mrigala, and the most infested carps always were the females. Similar to the sex, length-wise highest prevalence and intensity of Argulosis were occurred in the largest size groups of carps and among them, the highest infestation was in L. rohita, followed by C. carpio and the lowest was in C. mrigala. The heavily infected fish experienced physical injury and showed abnormal swimming, and blood oozing from the fish caused red skin lesions and then secondary infection took place by bacteria (Aeromonas, Pseudomonas) and other parasites and fungi. Argulosis delayed the fish production and near about 15-30% production losses were occurred due to lower growth, survival and production of infected carps in captivity.

Features of spring feeding of sterlet of the middle course of the Northern Dvina river

2020 ◽  
pp. 8-17
Author(s):  
A. Bykov ◽  
D. Palatov ◽  
I. Studenov ◽  
D. Chupov
Keyword(s):  
Benthic Communities ◽  
High Water ◽  
Food Composition ◽  
Fish Growth ◽  
High Water Content ◽  
Feeding Intensity ◽  
Biting Midges ◽  
Size Groups ◽  
Main Components ◽  
A Minor

The article provides information about the features of spring feeding of sterlet in the spawning grounds of the middle course of the Northern Dvina river in may 2019. The main and secondary groups of forage objects in the diet of this species of sturgeon are characterized. The article considers the variability of the sterlet food composition with an increase in the size of fish from 30 to 60 cm. In the process of fish growth in the diet of the Severodvinsk sterlet, the main components in terms of occurrence and mass in all size groups are the larvae of Brooks and chironomids. A minor occurrence was the larvae of midges, biting midges, stoneflies, mayflies and small clams. To random and seasonal food are the larvae of water bugs, butterflies, flies, beetles and eggs of other fish. The feeding intensity of the smaller sterlet (30–40 cm) was significantly higher than that of the fish in the size groups 40–50 and 50–60 cm. Fundamental changes in the diet of the Severodvinsk sterlet for the main food objects for more than sixty years of observations have not been established. During periods of high water content of the Northern Dvina due to seasonal changes in the structure of benthic communities, the value of Brooks in the diet of sterlet increases and the proportion of chironomids decreases.

scholarly journals Effects of Green Alga, Chaetomorpha aerea Extract on Non-Specific Immune Responses and Disease Resistance against Edwardsiella tarda Infection in Labeo rohita

2021 ◽  
Vol 11 (10) ◽  
pp. 4325
Author(s):  
Govindharajan Sattanathan ◽  
Vairakannu Tamizhazhagan ◽  
Nadeem Raza ◽  
Syed Qaswar Ali Shah ◽  
Muhammad Zubair Hussain ◽  
...  
Keyword(s):  
Immune Responses ◽  
Green Alga ◽  
Labeo Rohita ◽  
Virulent Strain ◽  
Edwardsiella Tarda ◽  
Fish Mortality ◽  
Control Group ◽  
Physiological Salt Solution ◽  
Myeloperoxidase Activity ◽  
Chaetomorpha Aerea

The current study evaluated the effects of a methanol extract from Chaetomorpha aerea (a green alga) on non-specific immune responses and resistance against Edwardsiella tarda infection in Labeo rohita. Different doses of the extract (5, 50 and 500 mg/kg of body weight) were injected into the fish intraperitoneally while a control group was injected with 0.2 mL of sterile physiological salt solution. Variations in several immunostimulatory parameters (i.e., neutrophil, serum lysozyme, myeloperoxidase, serum antiprotease, and ceruloplasmin activity), reactive oxygen species (ROS) and reactive nitrogen species (RNS) were assessed after 7, 14, 21, and 28 days of post stimulation. E. tarda culture was injected into the fish after 28 days of post stimulation to induce infection to monitor fish mortality within 14 days. Interestingly, all doses of methanolic extract enhanced neutrophil, lysozyme, and myeloperoxidase activity, ROS and RNS, while a dose of 50 mg/kg was the most effective. Fish injected with this optimal dose were also protected against infection with virulent strain of E. tarda. The results of the study suggest that C. aerea extract is a potential prophylactic agent against bacterial infections in finfish.

scholarly journals Genomic markers for the biological responses of Triclosan stressed hatchlings of Labeo rohita

2021 ◽  
Author(s):  
Sunil Sharma ◽  
Owias Iqbal Dar ◽  
Kirpal Singh ◽  
Sharad Thakur ◽  
Anup Kumar Kesavan ◽  
...  
Keyword(s):  
Labeo Rohita ◽  
Biological Responses ◽  
Genomic Markers

Status of Agricultural Credit and Indebtedness in India: An Analysis

2021 ◽  
pp. 001946622110153
Author(s):  
Suresh Kumar Maurya ◽  
Neha Vishwakarma
Keyword(s):  
Andhra Pradesh ◽  
Uttar Pradesh ◽  
Medium Term ◽  
Agricultural Credit ◽  
Indian States ◽  
Agricultural Household ◽  
Agricultural Households ◽  
Size Groups ◽  
Jel Code ◽  
Land Size

This article attempts to analyse status of agricultural credit and indebtedness in India. The objectives of the study are as follows: (a) to study a comparison of flow of total institutional agricultural credit among different land size groups at all India level; (b) to study a comparison of indebtedness of agricultural households between different size classes of land possessed at both states and all India level and (c) to analyse incidence of indebtedness in major Indian states. It is concluded that mostly, short- and medium-term loans of agricultural purposes are taken for marginal land size groups in India. The percentage of indebted agricultural households to total agricultural household increases as land size increases. The percentage of holdings is less than percentage of indebted agricultural households in Punjab, Uttar Pradesh, Andhra Pradesh, West Bengal, Karnataka, Odisha and Rajasthan. JEL Code: Q14

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