The stress response is protective: cross protection in fish

A guide to the study of fresh-water biology : with special reference to aquatic insects and other invertebrate animals

Antioxidant defense system, immune response and erythron profile modulation in gold fish, Carassius auratus, after acute manganese treatment

Multidisciplinary haematology as prognostic device in environmental and xenobiotic stress-induced response in fish

Evaluation of black soldier fly (Hermetia illucens) larvae meal as partial or total replacement of marine fish meal in practical diets for Pacific white shrimp (Litopenaeus vannamei)

In the present study, an attempt has been made to study the effect of heavy metal Manganese (MnSO4) on the haematological parameters of fish Garra gotyla gotyla for 9 weeks experimental duration. 96 hours LC50 value of Manganese for G. gotyla gotyla was found to be 3.2 mg/l and three concentrations viz. 20%, 40% and 60% of LC50 were employed during experimental period. The parameters evaluated include total erythrocyte count (TEC), haemoglobin (Hb), haematocrit (Hct), mean corpuscular volume (MCV), mean corpuscular haemoglobin (MCH), mean corpuscular haemoglobin concentration (MCHC), total leucocyte count (TLC) and differential leucocyte count (DLC). Compared to control groups, TEC, Hb and Hct were found to exhibit significant decline whereas MCV and MCH exhibited overall increase in all concentration groups while MCHC contrarily exhibited fluctuating pattern. TLC depicted significant increase in all fishes following exposure to Manganese. DLC was observed to register an increase in number of lymphocytes, monocytes and eosinophils but a decrease in neutrophils, basophils and thrombocyte population.

https://www.entomoljournal.com/vol2Issue3/pdf/39.1.pdf

Effect of Manganese on haematological parameters of fish, Garra gotyla gotyla

The effect of locally available low cost ingredients such as silk worm pupae (SWP), soyabean meal (SBM), earth worm meal (EWM) as a replacement of fish meal (FM) on growth, survival and biochemical composition, were investigated for Macrobrachiumdayanum (0.50 g). A significantly higher rate of growth, survival and food conversion ratio(FCR) were recorded for prawns fed EWM, as compared to SWP, SBM, and FM. The proximate composition of flesh further revealed a higher level of proteins and lipids in prawns fed EWM thereby indicating EWM as a possible substitute of FM.

	 

	Key words: Macrobrachium dayanum, low cost ingredients, biochemical composition.

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Replacement of fishmeal with locally available ingredients in diet composition of Macrobrachium dayanum

This investigation was carried out to study the effect of different live feed and dry feed on growth and survival of Labeo rohita at a stocking density of 20 larvae per trough having 10 L of water. The increase in weights and lengths were used as measures of growth. The duration of the experiment was 30 days. Seven dietary treatments were tested viz. Artificial diet with 45% protein (LFr1), rotifers like Asplanchna and Brachionus (LFr2), wild zooplankton (LFr3), bioenriched zooplankton (raised on Chlorella , cod liver oil and vitamin C) (LFr4), Artemia (LFr5), Chironomous (LFr6) and Oligochaetes (LFr7). Among the different treatments, larvae fed with diet LFr4 resulted in the maximum body weight gain (BWG) (13.18 ± 0.13 mg) which was significantly (P < 0.05) higher than all the treatments which followed the order of preference as: LFr5 (12.31 ± 0.10 mg), LFr3 (9.75 ± 0.08 mg), LFr2 (7.85 ± 0.10 mg), LFr7 (6.49 ± 0.15 mg), LFr6 (5.66 ± 0.13 mg) and LFr1 (4.99 ± 0.14 mg). The diet LFr4 recorded maximum survivability (92.0 ± 2.0%). All the values recorded for the BWG and survival were found to be significantly different (P < 0.05) among others. Protein and lipid content of the prawn after the treatment was found to be highest for LFr5 and LFr4, respectively.

Growth, survival and proximate body composition of Labeo rohita larvae fed artificial food and natural food organisms under laboratory condition

Stress can be described as the physiological response to a stressor. In other words, stress is an internal physiological state that is caused by external conditions. Stress can also be described as an internal hormonal response of a living organism caused by environmental or other external factors that moves that organism out of its normal physiological resting state, or homeostasis (Selye, 1973). Stress can disturb the normal physiological equilibrium or homeostasis of fish by forcing a reallocation of energy within its system. Stress in fish, a key member of aquatic environment and which also form a valuable commodity for human consumption (proteins, 16-23%) may be induced by various abiotic International Journal of Current Microbiology and Applied Sciences ISSN: 2319-7706 Volume 6 Number 5 (2017) pp. 357-369 Journal homepage: http://www.ijcmas.com

Effect of Stressors on Haematological and Hormonal Parameters of Garra gotyla gotyla

The present study was carried out to study the feeding habits of Labeo rohita from culture ponds of Gho-Manhasa fish farm, Jammu. Monthly samples were collected from the ponds to study the gut contents. In case of L. rohita in LrfI (lowest size group) and LrfII, LrfIII 40 guts/group, LrfIV 50 guts (due to non-availability of the size categorized) and 120 guts each in case of LrfV and LrfVI (largest size group) were analysed. For every group 10 guts/month were analysed to study feeding ecology in case of L. rohita. Individual stomach fullness scale was estimated to a subjective scale, ranging from 0 (empty) to 5 (full). The results so obtained were used to compute percentage volume of food items in the gut (%V), percentage of ocurrence of guts having particular food item (%0) and Index of preponderance (IOP). The food of Labeo rohita consisted of plant (algae and macrophytes) and animal matter (protozoa, rotifers, cladocerans, copepods, molluscs, annelids and insects) besides unidentified matter (UM), sand/mud and detritus. Of the total 420 specimens analyzed, only 84 (20%) were found with empty guts and 336 (80%) were found with food components. Index of Preponderance (IOP) revealed that algae, along with protozoans, rotifers and cladocerans were the most preferred food items in the smaller size groups and marked a decline as the size of the fish increased. In the advanced stages, macrophytes, detritus and sand/mud were Found to form a major share of food. Subsequently rohu has been categorized as omnivore-planktophage in early stages of life and herbi-omnivore in adult stages.

Seema Langer

Papers

Effect of Manganese on haematological parameters of fish, Garra gotyla gotyla

Replacement of fishmeal with locally available ingredients in diet composition of Macrobrachium dayanum

Growth, survival and proximate body composition of Labeo rohita larvae fed artificial food and natural food organisms under laboratory condition

Effect of Stressors on Haematological and Hormonal Parameters of Garra gotyla gotyla

Studies on the Feeding habits of Labeo rohita (Ham.) from Gho-Manhasa Fish Ponds, Jammu, North India