scholarly journals Fry Survival Rate as a Predictive Marker of Optimal Production of Silver Carp (Hypophthalmichthys molitrix, Valenciennes 1844): A Biostatistical Study in Deroua Fish Farm, Morocco

2021 ◽  
Author(s):  
Fatima-Zahra Majdoubi ◽  
Anouar Ouizgane ◽  
Sana Farid ◽  
Laura Mossetti ◽  
Mohammed Droussi ◽  
...  
Keyword(s):  
Survival Rate ◽  
Environmental Temperature ◽  
Silver Carp ◽  
Predictive Marker ◽  
Fertilization Rate ◽  
World Population ◽  
Hypophthalmichthys Molitrix ◽  
Optimal Production ◽  
Significant Difference ◽  
Eggs Quality

AbstractSeveral indicators show that the world population is rapidly increasing with prospects of reaching close to 10 billion people in 2050. Optimal production of fish is a tentative goal to ensure human feeding and resources sustainability. The present study was performed on eggs of the silver carp, collected during the breeding season of consecutive years with different environmental temperature profiles at the Deroua Fisheries Station to evaluate the seasonal and inter-seasonal changes of eggs quality in order to promote a predictive marker for optimal production of silver carp. The viability of the obtained eggs was detected using ANOVA  followed by the Tukey test to analyze fertilization rate, embryos survival rate, and fry survival rate. Data analysis showed no significant difference in the fertilization and survival rate of the embryos during the two breeding seasons, and therefore these can not be used as an adequate criterion to predict the viability of the fry of silver carp. Although the survival rate of the fry did not change during the first season, it changed significantly during the second when there was an increase in the environmental temperature. This factor could be responsible for the disturbance of the females' oogenesis and consequently the degradation of the eggs' quality. The results showed that the fry survival rate could be used as a parameter to predict the yield of silver carp production rather than the success of fertilization and the survival of embryos. This paper discusses the importance and scope of this approach.

scholarly journals Ova Fatty Acids Composition and Spawning Performances of Silver Carp, Hypophthalmichthys molitrix (Morocco)

2020 ◽  
Vol 20 (12) ◽  
pp. 879-888
Author(s):  
Fatima-Zahra Majdoubi ◽  
Redouane Benhima ◽  
Anouar Ouizgane ◽  
Sana Farid ◽  
Mohammed Droussi ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Oleic Acid ◽  
Docosahexaenoic Acid ◽  
Eicosapentaenoic Acid ◽  
Saturated Fatty Acids ◽  
Silver Carp ◽  
Fertilization Success ◽  
Hypophthalmichthys Molitrix ◽  
Maternal Weight ◽  
Significant Difference

The present study is performed in order to determine the relationship between fatty acid (FA) profile of silver carp (Hypophthalmichthys molitrix) eggs and fertilization success, embryos viability and larval production. Mature unfertilized ova were collected during the reproductive season from 23 mature and healthy females, reared in Deroua fish farm (Morocco). Total lipids were extracted from ova sample and subjected to trans-esterification then the resulting fatty acids methyl esters were analyzed by gas chromatography tandem mass spectrometry (GC/MS/MS). The results showed that silver carp ova are dominated on total FA by docosahexaenoic acid (DHA) (21.21%) followed by oleic acid (21.07%), palmitic acid (17.71%) and eicosapentaenoic acid (EPA) (10.25%). During the breeding season, polyunsaturateds (PUFAs), monounsaturateds (MUFAs) and saturated fatty acids (SFA) didn’t show any significant difference. Moreover, within the PUFAs, the n-3 series were more abundant than the n-6 series, the total mean was 31.57 ± 1.01% and 5.33 ± 0.32%, respectively. No correlation was between fatty acids and the fertilization success. Maternal weight has effect on the levels of oleic acid (C18:1), arachidonic acid (C20:4) and docosahexaenoic acid (C22:6) in the egg whereas levels of palmetoleic acid (C16:1), eicosapentaenoic acid (C20:5) and docosahexaenoic acid (C22:6) are related to female age.

scholarly journals REPRODUCTIVE PERFORMANCE OF DOMESTICATED BROODSTOCK OF SILVER PERCH, Bidyanus bidyanus (MITCHELL 1838) AND THE RELATIONSHIP BETWEEN OIL GLOBULE FRAGMENTATION AND EGG QUALITY

2017 ◽  
Vol 12 (2) ◽  
pp. 43 ◽  
Author(s):  
Sulaeman Sulaeman ◽  
Ravi Fotedar
Keyword(s):  
Survival Rate ◽  
Reproductive Performance ◽  
Egg Quality ◽  
Fertilization Rate ◽  
Hatching Rate ◽  
High Fecundity ◽  
Fertilisation Rate ◽  
Significant Difference ◽  
The Relationship

The experiments investigated the reproductive performance of the domesticated broodstock of the silver perch and the relationship between various degrees of oil globule fragmentation and egg quality. Six years old of second generation broodstock (n=3) were evaluated based on the fecundity, fertilisation rate, hatching rate, the degree of oil fragmentation of egg, and the quality of embryos and larvae produced. The fragmentation were grouped into three categories: un-fragmented (cat-1), moderately fragmented (cat-2), and highly fragmented (cat-3). The results showed that the broodstock had a relatively high fecundity (132,400 ± 7,22), fertilization rate (94.27 ± 1.28%), and hatching rates (87.94 ± 1.23%). The survival rate of larvae at 12 days post hatching (dph) in cat-1 (71.3 ± 0.9%) was higher than cat-2 (66.7 ± 0.9%) whereas cat-2 was higher than cat-3 (61.3 ± 0.3%). The eggs was dominated by cat-1 (78.11 ± 2.44%) which was significantly higher than cat-2 (21.26 ± 2.45%) and cat-3 ones (0.40 ± 0.21%). The survival rate of embryo at 20 hours post spawning (hps) and hatching rate of cat-1 (95.33 ± 0.00% and 93.33 ± 0.00%) and cat-2 (90.00 ± 0.00% and 85.00 ± 0.00%) were significantly higher than cat-3 (72.33 ± 1.76% and 60.33 ± 0.00%). The total length (TL) of the larvae of cat-1 and cat-2 (8.44 ± 0.21 mm and 8.35 ± 0.23 mm respectively) were significantly higher than larvae of cat-3 (7.09 ± 0.14 mm). No significant difference was found in the larval deformities among any categories. In conclusion, the reproductive performance of six year-old broodstock silver perch showing acceptable performance and egg categorisation based on oil globule fragmentation can be used as a useful tool to indicate eggs quality of silver perch.

scholarly journals ẢNH HƯỞNG CỦA ĐỘ MẶN ĐẾN HIỆU QUẢ SINH SẢN CỦA NGÁN BỐ MẸ (AUSTRIELLA CORRUGATA) TRONG ĐIỀU KIỆN NUÔI VỖ

2019 ◽  
Vol 19 (1) ◽  
pp. 115-125
Author(s):  
Nguyen Xuan Thanh ◽  
Luc Van Long ◽  
Tran Thi Thu Trang ◽  
Pham Quoc Hung
Keyword(s):  
Survival Rate ◽  
Fertilization Rate ◽  
Reproductive Efficiency ◽  
Treatment Results ◽  
Larval Quality ◽  
Significant Difference ◽  
Maturation Rate ◽  
Production Techniques ◽  
Efficiency Rate

This study was conducted to evaluate the effect of dietary, salinity on the reproductive efficiency of mud clam broodstock (Austriella corrugata) in the maturing condition. The reproductive efficiency was assessed by survival rate, maturation rate, actual fecundity, spawning rate, fertilization rate, reproductive efficiency rate (100*D-veliger/fertilized eggs), larval quality. The experiment was held in the five dietaries and three salinities (18‰, 23‰ and 28‰). Three replicates were carried out for each treatment. Results showed that the reproductive efficiency of using fresh algae complex in 28‰ salinity was the highest and the larvae are in good quality, followed by that in the 23‰ salinity but having no statistically significant difference ( p > 0.05) while that in the 18‰ salinity experienced the least (p < 0.05). This study on dietary, salinity suggests that fresh algae complex in the salinity of 28 ± 1‰ is suitable for maturing broodstock of mud clam. These findings will contribute to building up hatchery production techniques as well as helping protection of natural stock and developing sustainable mud clam resource.

scholarly journals Optimization of dietary protein level for good aquaculture practice based carp fattening in ponds under drought prone area of Bangladesh

2021 ◽  
Vol 6 (1) ◽  
pp. 26-34
Author(s):  
Md. Anwar Hossain ◽  
Md. Akhtar Hossain ◽  
Md. Ayenuddin Haque ◽  
Md. Harun-Ur-Rashid ◽  
Md. Moksedur Rahman
Keyword(s):  
Dietary Protein ◽  
Protein Level ◽  
Polynomial Regression ◽  
Silver Carp ◽  
Hypophthalmichthys Molitrix ◽  
Feed Conversion ◽  
Fish Yield ◽  
Significant Difference ◽  
Prone Area ◽  
Drought Prone Area

Good aquaculture practice (GAP) based carp fattening is a potential technique to obtain higher and safe fish production within shorter period in ponds of drought prone area. Sustainability of this technique, however, is constrained by high feed cost and poor water quality. Therefore, as an overcoming effort, three diets (protein content of 20%, 25% and 30%) under three different treatments (T1, T2 and T3) were tested during January-June, 2020 in fattening ponds of carps (Catla, Gibelion catla; silver carp, Hypophthalmichthys molitrix; rohu, Labeo rohita; mrigal, Cirrhinus cirrhosis; and carpio, Cyprinus carpio var. specularis) under Rajshahi district, Bangladesh. Variation in protein level had no significant effect on environmental parameters of pond water. Combined fish yield was found to vary significantly (P<0.05) among the treatments, while feed conversion ratio did not vary significantly. Although second degree polynomial regression analysis identified 28.50% dietary protein for optimal growth of carps but no significant difference between T2 and T3 was found for the total fish yield. However, significantly (P<0.05) highest cost-benefit ratio obtained with the diet containing 25% protein suggested this protein level in diet was profitable for carp fattening in pond.

scholarly journals Growth performance of silver carp (Hypophthalmichthys molitrix) in cage stocked at different densities

2018 ◽  
Vol 16 (2) ◽  
pp. 322-327
Author(s):  
Rumana Akhtar Jui ◽  
Mohammad Mahfujul Haque ◽  
SM Rahmatullah
Keyword(s):  
Growth Performance ◽  
Silver Carp ◽  
Quality Parameters ◽  
Individual Growth ◽  
Phytoplankton Production ◽  
Total Production ◽  
Hypophthalmichthys Molitrix ◽  
Highest Weight ◽  
Significant Difference ◽  
Cage Size

An experiment was conducted to evaluate the growth performance of silver carp (Hypophthalmichthys molitrix) in cage stocking at different densities. It was expected that silver carp could grow feeding on plankton without external feeding. In this experiment, silver carps in nine cages were stocked in three different stocking densities such as 20, 30 and 40 fishes/m3 designated as treatments T1, T2 and T3, which were located in the south west corner of the L-shaped pond in Field Laboratory Complex, Faculty of Fisheries, Bangladesh Agricultural University (BAU), Mymensingh consisting of three treatments with three replications of each for a period of 90 days from 18th August to 17th November, 2015. Each cage size was 1m x 1m x1m (length x width x height) and silver carp was cultured in the cage with natural feed which filtered phytoplankton mainly. Twenty five genera of phytoplankton were identified in pond and the average phytoplankton production was around 8.44x105cells/liter. Water quality parameters such as temperature, dissolved oxygen, pH and transparency were recorded fortnightly. At the completion of the experiment, weight showed significant difference (p>0.05) among three treatments although length didn’t vary significantly. The highest length gain (18.61+0.369 cm) and the highest weight gain (62.52+2.249 g) were found in T1. The highest SGR% for silver carp was found in T1 and the highest total production was obtained in T3 (5.00+ 0.015 kg/m3). Individual growth performance of silver carp was satisfactory. Further studies are needed with different stocking densities and duration to verify the result.J. Bangladesh Agril. Univ. 16(2): 322-327, August 2018

scholarly journals Farmer participatory pond based cage aquaculture for raising fish seed in South Garo Hills, Meghalaya, India

2017 ◽  
Vol 64 (2) ◽  
Author(s):  
S. K. Das ◽  
T. Samajdar ◽  
Amit Das ◽  
M. Islam
Keyword(s):  
Survival Rate ◽  
Silver Carp ◽  
Stocking Density ◽  
Primary Objective ◽  
Hypophthalmichthys Molitrix ◽  
Cage Culture ◽  
Common Carp Cyprinus Carpio ◽  
Cage Aquaculture ◽  
Garo Hills ◽  
Net Cages

Fingerling sized fish seeds are always in great demand for any type of aquaculture operations. The paper highlights the results of a maiden study undertaken to popularise pond based cage culture for raising fingerling sized fish seed aimed at stocking quality fish fingerlings for augmenting fish production in the Garo Hills of Meghalaya. A farmer participatory study was undertaken for raising fry to fingerling sized fish seeds of 3 fish species viz., silver carp (Hypophthalmichthys molitrix), gonius (Labeo gonius) and common carp (Cyprinus carpio) in pond based cages during September-November 2011. Fry sized fishes of these species were reared in locally made bamboo-net cages (2 x 1.5 x 2 m) at different stocking densities. The primary objective was to increase the survival rate and observe the comparative growth rate of different species under varied stocking densities. A total of 18 cages were grouped under 3 stocking densities viz., 150, 250 and 300 fry m-3. Highest survival rate was observed at a stocking density of 150 fry m-3 for all the three species. Among the three species, silver carp demonstrated the highest survival rate at all the stocking densities. In terms of growth, better performance was observed with stocking density of 250 fry m-3 for all species.

scholarly journals Characterization of functional fish ham produced from Silver carp (Hypophthalmichthys molitrix) surimi enriched with natural antioxidant and vegetable fiber

2021 ◽  
Vol 33 (SP1) ◽  
pp. 127-136
Author(s):  
Ebrahim Mahdavi ◽  
Peiman Ariaii
Keyword(s):  
Color Index ◽  
Silver Carp ◽  
Orange Peel ◽  
Cooking Loss ◽  
Grape Pomace ◽  
Control Treatment ◽  
Hypophthalmichthys Molitrix ◽  
Low Fat ◽  
Quality Properties ◽  
Significant Difference

In this study, the effect of grape pomace (GE), orange peel extract (OE), and nisin (N) with modified atmosphere packaging (MAP: 70% CO2 + 30% N2) was investigated on the quality and shelf life of ham produced from low fat Silver carp surimi (containing inulin fiber [FI] and salatrim [S]) kept in the refrigerator with T1: control (con-taining nitrite), T2: control + MAP, T3: GE 0.5%+ FI 5% +OE 0.5% +N 0.5%, T4: S 5%+ OE 0.5%+ GE 0.5% +N 0.5% + MAP, T5: FI 2.5%+ S 2.5%+ GE 0.5%+ OE 0.5%+ N 0.5%+ MAP. The texture characteristics of ham at the beginning of storage, cooking loss, chemical indices (peroxide value, pH, color index), and microbial (total count bacteria, psychrotrophic bacteria, mold and yeast, Clostridium botulinum) during 42 days storage in the refriger-ator (4 ± 1°C) were evaluated. The results of the tests were analyzed according to Duncan’s by SPSS software with 95% confidence. The results showed that inulin and salatrim fibers have a positive effect on the texture and cooking loss of ham and inulin had a better effect, so the value of cooking loss in treatment 3 was 1.62% and control treatment was 2.09%. Using three natural preservatives along with MAP could slow down the oxidative spoilage, microbial and color index changes in ham. These combinations also inhibited the growth of C. botulinum. In most tests examined, treatment 3 showed no significant difference with treatment 1 (ham containing nitrite) (P > 0.05), so this treatment shows that natural additives (nitrite replacement) improve the quality properties of low-fat ham.

scholarly journals Growth Performance of Hypophthalmichthys molitrix and Barbodes gonionotus Fingerlings by Feeding Microalgae Cultured on Fertilizer Factory Effluent

1970 ◽  
Vol 45 (4) ◽  
pp. 315-322
Author(s):  
MA Toyub ◽  
MI Miah ◽  
MAB Habib
Keyword(s):  
Growth Rate ◽  
Weight Gain ◽  
Survival Rate ◽  
Specific Growth Rate ◽  
Growth Performance ◽  
Specific Growth ◽  
Silver Carp ◽  
Scenedesmus Obliquus ◽  
Hypophthalmichthys Molitrix ◽  
Control Survival

Growth performance of Hypophthalmichthys molitrix (Silver carp) and Barbodes gonionotus (Sar puti) fingerlings were studied separately in aquaria by feeding cultured microalgae (Chlorella ellipsoidea, Scenedesmus obliquus and Spirulina platensis) in different combinations for a period of 21 days. Fertilizer factory effluent was used to grow these microalgae. Significantly (p<0.05) higher weight gain of H. molitrix (81.16%), was in the treatment T2 (Rearing by feeding 100% S. platensis) and the minimum percentage (- 4.29%) was obtained in the control (fed on fishmeal and mustered oil cake). Specific growth rate (SGR, %/day) of H. molitrix were determined - 0.21 to 2.84 for all the treatments which was significantly (p<0.05) higher in T2. Survival rate of H. molitrix was 25.90 to 77.80%. In the case of B. gonionotus, significantly (p<0.05) higher weight gain (149.10%) was observed in t2 (Rearing by feeding 100% S. platensis). The SGR (%/day) of B. gonionotus were ranged from 2.25 to 4.33 which was significantly (p<0.05) higher in t2 than all other treatment except control. Survival rate of B. gonionotus was ranged from 97.78% to 100%. The reared fingerlings were found nutritionally rich. Key words: Fingerlings; Microalgae; Growth performance; Specific growth rate. DOI: 10.3329/bjsir.v45i4.7328 Bangladesh J. Sci. Ind. Res. 45(4), 315-322, 2010  

scholarly journals Effect of natural antioxidants and vegetable fiber on quality properties of fish sausage produced from Silver carp (Hypophthalmichthys molitrix)

2021 ◽  
Vol 33 (SP1) ◽  
pp. 117-126
Author(s):  
Ebrahim Mahdavi ◽  
Peiman Ariaii
Keyword(s):  
Silver Carp ◽  
Modified Atmosphere Packaging ◽  
Natural Antioxidants ◽  
Grape Pomace ◽  
Hypophthalmichthys Molitrix ◽  
Low Fat ◽  
Quality Properties ◽  
Functional Product ◽  
Significant Difference ◽  
Natural Preservatives

In this study, production of low-fat, nitrite-free sausage based on Silver carp surimi was performed. In order to replace oils, inulin fiber (IF) was used; natural preservatives such as grape pomace extract (GE) and nisin (NI) were used as nitrite replacements with modified atmosphere packaging (MAP: 70% CO2 + 30% N2). For this purpose; five treatments including, T1: control, T2: control + MAP, T3: IF 5% + MAP, T4: IF5% + GE0.5% + MAP, and T5: IF5% + GE0.5% + NI 0.5% + MAP, were prepared. The physicochemical and texture properties of sausage at the beginning of storage and chemicals (Peroxide value, pH, and color index) and microbial index (Total count and psychrotrophic bacteria) during 42 days’ storage in the refrigerator (4 ± 1°C) were evaluated. The results showed that the use of natural preservatives had no effect on the physicochemical properties of the sausage (P > 0.05), but the FI had a positive effect on the texture characteristics (the firmness increased and elasticity decreased), increased moisture and ash, and reduced the fat content of sausages (P < 0.05). All in all, the best results among the treatment containing natural preservative was T5, in all microbial and chemical tests there was no significant difference with T1 (P > 0.05). All in all, a functional product with properties such as fiber and natural antioxidants, low fat and nitrite-free can be produced.

scholarly journals Phenotypic Plasticity in Gut Length in the Planktivorous Filter-Feeding Silver Carp (Hypophthalmichthys molitrix)

2008 ◽  
Vol 8 ◽  
pp. 169-175 ◽  
Author(s):  
Zhixin Ke ◽  
Xie Ping ◽  
Longgen Guo
Keyword(s):  
Phenotypic Plasticity ◽  
Lake Taihu ◽  
Silver Carp ◽  
Stocking Density ◽  
Food Resources ◽  
Hypophthalmichthys Molitrix ◽  
Filter Feeding ◽  
Field Evidence ◽  
Significant Difference ◽  
Gut Length

Phenotypic plasticity widely exists in the external morphology of animals as well as the internal traits of organs. In the present study, we studied the gut length plasticity of planktivorous filter-feeding silver carp under different food resources in large-net cage experiments in Meiliang Bay of Lake Taihu in 2004 and 2005. There was a significant difference in stocking density between these 2 years. Under a low stocking density and abundant food resources, silver carp increased their energy intake by feeding on more zooplankton. Meanwhile, silver carp adjusted their gut length to match the digestive requirements of food when exposed to different food resources. In the main growth seasons (from April to October), silver carp significantly increased their relative gut length when feeding on more phytoplankton in 2005 (p< 0.01, 9.23 ± 1.80 in 2004 and 10.77 ± 2.05 in 2005, respectively). There was a nearly significant negative correlation between zooplankton proportion in the diet and the relative gut length when silver carp were stocked in a high density (p= 0.112). It appears that silver carp might have evolved plasticity to change their gut length rapidly to facilitate efficient utilization of food resources. Such resource polymorphisms in the gut may be a good indication of temporal adaptation to resource conditions. Our work provided field evidence for understanding the functional basis of resource polymorphisms and the evolution of phenotypic plasticity in planktivorous filter-feeding fish.

Sign in / Sign up

Export Citation Format

Share Document