The stomach content analysis in this study distinguished the fish species into two major groups. Gsi 100 x wet weight of gonads wet weight of whole animal. Individuals were adults and homogeneous size and weight, except those from mb site which were smaller fish, in both sexes, were collected mannwhitney test, p contents of testosterone t in males of two neighboring populations of peromyscus melanotis j. Bafs results indicated that zn, pb, and cu have higher baf than other elements.
It is a tool for measuring the sexual maturity of animals in correlation to ovary development and testes development. Feeding activity has been inferred in echinoids from indices relating washed guts, gut contents or bothtogether,withtotalweightorvolume. Studies on the fecundity f, gonadosomatic index gsi and. Using data collected from two teleostean fish species the assumptions of the gonosomatic index gsi were examined primarily by regression analysis and analysis of covariance. Gonadosomatic index and seasonal variations of plasma sex. Nov 01, 2009 gonadosomatic index and length of males and females the main characteristics of collected fish are given in table 1. While gonado somatic index is the ratio of fish gonad weight to body weight. Gonadosomatic index, fecundity and egg size of auchenoglanis. Effect of methallibure on gonadotrophic content, ovarian 32p. Using the gonadosomatic index to estimate the maturity ogive. The proportion of females identified in each treatment was tested against the 1. Andrew bay, florida, collected during july and september 2006.
A comparison of condition factor and gonadosomatic index. Study of gonadosomatic index of cyprinid fish, salmostoma. Seasonal changes of commercial traits, the scallop. Isaias hazarmabeth salgadougarte universidad nacional. Gonadosomatic index gsi the tilapia to be operated is weighed its weight first, as well as the gonad which has been obtained from operation result. Reproduction is the most critical stage in the life cycle of a species, which determines its survival and success. Bioaccumulation of trace elements in different tissues of. Therationale behind the study of washed gut weights is that. Seasonal variations in the physiological status and energy content of.
It measures reproductive strain of fishes by measuring general body weight ratios. Dynamics of gonadosomatic index of fish with indeterminate. Time course sampling showed that final oocyte maturation and subsequent ovulation occurred from afternoon to evening on. Variation in biochemical composition during gonad maturation. In addition, it was determined that striped mullet that recruit into south carolina estuaries spawn from october through april. Calculate the log10gsi and graph the frequencies in a histogram to visually see the bimodal pattern of. The weight length relationship, gastrosomatic index, gonadosomatic index, hepatosomatic index and condition factor were found to be differed in three freshwater fishes analyzed. The gonadosomatic index, abbreviated as gsi, is the calculation of the gonad mass as a proportion of the total body mass. The yearly gonadal cycle of two kinneret teleosts, barbus longiceps and capoeta damascina and of their hybrid, was assessed by measuring the. We retained shell2, shell3, and shell4 crab and divided them into two groups for comparison. Timeseries of condition factor cf and gonadosomatic index gsi were generated using general linear models glm for sardine sardinops sagax stocks in the northern and southern benguela ecosystems over the period 19841999. Calculation of gonadosomatic index i g i g is only used to show the degree of development of the gonads for both male and female fish. This index is frequently used as reporting point in oecd test guideline.
The highest gsi for both the sexes were in the ripe stages followed by late maturing stages. Relationship of molting, gonadosomatic index, and methyl. These methodologies were refined through three years of sampling at three midcolumbia river hatcheries leavenworth, entiat, and winthrop national fish hatcheries with four salmonid stocks both spring and summer chinook salmon, as well as steelhead. The gonads of fish were collected through scissor and weighed by a portable electric balance. Changes of gonadosomatic index of the red mullet mullus barbatus ponticus in. Jun 21, 2005 changes in condition factor cf and gonadosomatic index gsi in maturing and non. Gonadosomatic index showed three main peaks in winter, spring and summer months. Variations in the coelomic fat content may be related to gonadal maturation, the. The sex ratio, gonadosomatic index, fecundity and diet composition of hepsetus odoe in eleyele lake, southwest, nigeria were. Reproductive aspects in addition to condition factor, gonadosomatic index gsi and hepatosomatic index hsi were analyzed based on weight of the body length, total body weight and organ weights of the fish. In fish, gsi is a good indicator of reproductive activity, so the spawning season. Changes in the gonadosomatic index gsi helps to determine the reproductive season of the fish arruda et al. Usman ali hashmi abstract gonadosomatic index value in males during september march were 4.
The results showed that condition index ci and meat yield my peaked in december 60 and 30%, respectively and in april, may and june from 53 to 60% for ci and from 34 to 36% for my. Lengthweight relation, condition factor and gonadosomatic index of. Gonadosomatic index and fecundity studies are useful for making total population estimates, population dynamics or productivity. Gonadosomatic index, oocyte development and fecundity of. These data were entered, archived, and managed using the omnr fishnet software package lester et al. Freshwater goby, glossogobius giuris is an important food fish of bangladesh. Using the gonadosomatic index to estimate the maturity. Hsi and gonadosomatic index gsi of striped mullet from st. The i g of the samples were measured according to the following method i g gonad weight body weight. The trend in the nidamental gland mantle length index closely paral leled the trend in gsi values for fe male individuals of l. Effect of garcinia kola seeds supplemented diet on growth. Gonadosomatic index and gonad histopathology of gobius niger. Condition factor, gonadosomatic index, hepatusomatic index. Gonadosomatic index gsi of the male and female fishes of the collected samples were determined separately by the following method gsi the relationship between fecundity and total length, standard length, body weight and gonad weight were determined with the help of a computer software viz spss.
Then the gonadosomatic index gsi is calculated using the formula 1. The average gsi of both female and male snakehead fish was the highest in july 2018, at 6. Monthly gonadosomatic index gsi and hepatosomatic index hsi of salmo trutta fario. Correlation between the gonadotropins and gsi was also worked out but was found to be statistically nonsignificant p 0. Inaccuracies in routinely collected atlantic herring clupea. Pdf gonadosomatic index and fecundity of threatened reba. Radio immunoassay ria methodology the method used for steroid hormone measurement was based on that described by fostier et al. Illustration of the female gonadosomatic index gsi results from experiment 1. The gonadosomatic index is an important indicator of the general health of an organism. All experimental cages contained salmon stocked as smolts in april 2001. Gonadosomatic index gsi and pb showed positive correlation together in both b.
Results of anova revealed a statistically significant effect of different doses of sodium fluoride on body weight gain and gonadosomatic index in both species, i. In the present research, accumulation of cd, co, cr, cu, mn, ni, pb, v, and zn were determined in sediments and fillet, liver, kidney, gonads, and gills of three commonly fish species in the largest wetland ecosystem that is located in southwest of iran. Zebrafish were fed to satiation three times daily during the normal work week a. A 5week study was conducted to evaluate commercially available artemia, ziegler zebrafish diet, and calamac diet fed in five different feeding regimes on the growth and reproductive development of 7monthold zebrafish. The reproductive cycle of the commercial sea urchin. Plagiostomus obtained from river lidder is presented in table i, 2 and 3. Inaccuracies in routinely collected atlantic herring clupea harengus maturity data and correction using a gonadosomatic index model volume 91 issue 7. Manuscript approved for publication 19 june 2003 by scienti. Pdf the sex ratio, gonadosomatic index, stages of gonadal. Gonadosomatic index as a confounding variable in fish. Results showed monthly changes in gsi from november, 2017 to october, 2018. Changes in condition factor and gonadosomatic index in.
Calculate condition factor k10 5 fish weight g length 3 mm. Final survival was analyzed using a chisquare test. It is used to estimate or measure reproductive capacity. Gonadosomatic index an overview sciencedirect topics. Seasonal variation in reproductive loligo chinensis and the. Theinfluence of indices of reproduction gonadosomatic index gslrand. Gonadosomatic index value in males during september march were 4. Lengthweight relationship lwr, gonadosomatic index gsi and. Gonadosomatic index value in males during august november were 3.
Also this investigation demonstrated that trace elements have different affinities with condition factor of studied fish species. Seasonal variation in reproductive loligo chinensis and. Gonadosomatic index in barbus longiceps, capoeta damascina and. Influence of climatic factors on the interannual changes of. Lengthlength relationship, lengthweight relationship, gonadosomatic index, condition factor, size at maturity and fecundity of parastromateus niger carangidae in kuwaiti waters s. In the present study the fecundity was found to be maximum 326. Standard mathematical formulations were used in determining the mentioned parameters. Fecundity and spawning season of striped mullet mugil. Dadzie department of biological sciences, kuwait university, safat, kuwait. This study showed the interspawning variation in the predicted gsi of japanese anchovy using the gravimetric oocyte packing density method. Analysis on gonadosomatic index and fecundity of terapon. Gonadosomatic index gsi was a comparison between the gonad weight and the body weight of the fish multipled by 100. Gonadosomatic index is used to determine the maturity stages of gonad khallaf and alnenaei, 1987.
Characteristics, mercury tissue concentrations ngg wet weight and health parameters. The sex ratio, gonadosomatic index, stages of gonadal development and fecundity of sompat grunt pomadasys jubelini off lagos coast, nigeria were. Elizete rizzo, nilo bazzoli, in biology and physiology of freshwater neotropical fish, 2020. Allen and chapman, 1897, that differ in their population density and in its seasonal fluctuations, even though they. Mar 05, 2019 heaptosomatic index, gonado somatic index and condition factor of anabas testudineus as biomonitoring tools of nickel and chromium toxicity dina nath pandit1, priyanka2, moti lal gupta3 1,2,3department of zoology veer kunwar singh university, arrah 802 301, bihar, india. Determination of liver somatic index lsi and gonadosomatic. Analysis on gonadosomatic index and fecundity of terapon puta. Gonadosomatic index and some hematological parameters in. Gonad somatic index and feeding habit of selected fish species of. Pdf the sex ratio, gonadosomatic index, stages of gonadal development and fecundity of saddle grunt fish, pomadasys maculatum block, 1793 of the. Fat muscle content was significantly higher p gonadosomatic index gsi is widely used as a simple measure of reproductive capacity, but its validity has often been questioned. Musculature was analyzed for total mercury content. Research article ovarian development and vitellogenin.
A logistic multinomial model was implemented to separate immature, matureactive, and matureinactive fish, based only on their value of gsi. Allen and chapman, 1897, that differ in their population density and in its seasonal fluctuations, even though they inhabit in quite similar habitat conditions. Here, we propose using the gonadosomatic index gsi as an alternative way to estimate the maturity ogives. Effect of the combination of a coldwater temperature and. During this period the biomass of sardine in the northern benguela remained at relatively low levels of jun 21, 2005. The development of gonad is estimated by determining its weight relative to the body weight of the fish hopkins, 1979. Gonad and body mass were measured to the nearest 0. Calculate gonadosomatic index gsi gonad weight g fish weight g 100. Shadegan is one of the most important wetland that posses various fauna and flora but suffers inputs from agricultural and.
Solid lines represent long photoperiod treatment 15 h, and dashed lines represent short photoperiod 12 h. Utilizing the gonadosomatic index gsi for hatchery evaluation. Hepatosomatic index an overview sciencedirect topics. The stomach was opened for gonad examination and food content analysis. Studies on the fecundity f, gonadosomatic index gsi. To determine the gonadosomatic index each fish was sacrificed to collect the ovaries and the ovaries were dried with the help of blotting paper and weighed individually by an electric balance and kept in 5% formalin for the preservation of the ovaries as well as to make it much easier to separate the eggs. Catfish are an important component of demersal fisheries in the persian gulf. Provincial northern pike life history parameters 1. Mean monthly gonadosomatic index for loligo chinellsis over thestudy period for ai males and bi females. When do mountain whitefish prosopium williamsoni spawn.
Pituitary gonadotropin content and gonadosomatic index in. While significantly p content and promises to be a favorable prized food fish. Numbers next to lines represent treatment temperatures. Gonadosomatic index gsi on the crap and the nile tilapia type. Lengthweight relation, condition factor and gonadosomatic index of the. Dec, 2007 the gonadosomatic index gsi and the hepatosomatic index hsi showed negative correlations throughout the study period as well as during the progression of gonad maturation stages. Effects of zn and cd on condition factor cf, hepatosomatic his and gonadosomatic gsi of oreochromis niloticus, after exposing the animals to 10 % of their lc50 values, namely 6. Fat muscle content was significantly higher p gonadosomatic index gsi value 17. Gonadotrophin content in the pituitary gland and blood serum as well as ovarian 32p uptake were studied in response to methallibure treatment in h. Gsi values in male increased slowly reaching to maximum in 5. The sex ratio, gonadosomatic index, diet composition and.
A comparison of estimates based on gonadosomatic indices and spawner and egg counts robyn l. Lengthlength relationship, lengthweight relationship. Wild pigs are carriers of over 30 zoonotic diseases and are a major source of. Shell condition was classified upon arrival in juneau using the nmfs shell condition index jadamec et al. Heaptosomatic index, gonadosomatic index and condition. The results obtained indicated adverse effects on the gonads as well as on liver weight. Study of gonadosomatic index of fresh water fish cyprinus carpio ashwini g. In order to answer this question, we compare intragonadal contents of testosterone t in males of two neighboring populations of peromyscus melanotis j.
Effect of methallibure on gonadotrophic content, ovarian 32p uptake and gonadosomatic index in the freshwater catfish, heteropneustes fossilis bloch. Fecundity of johnius borneensis bleeker, 1850 from lower agusan. Variations in hepatosomatic index hsi and gonadosomatic. Fecundity and gonadosomatic index of glossogobius giuris. Gonadosomatic and hepatosomatic indexes of the freshwater. Salam1 abstract the breeding season of fishes plays an important role in fish domestication and conservation of fish diversity.
Gonadosomatic index, oocyte development and fecundity of the. Reproductive biology of glossogobius giuris hamilton, in. The gonadosomatc index gsi is a reliable indicator of changes in nutritional and. The gonadosomatic index gsi in the above groups was found to be 0. The relative length of intestine and somatogastric index value were found to be inconsistent in all the fishes studied. In an effort to improve such screening assays, the goal of the present study was to determine whether the gonadosomatic index gsi of female fathead minnows pimephales promelas, as assessed via external characteristics, influences their response to redc exposure. Effect of sodium fluoride on body weight gain and gonadosomatic index 341 experimental protocol acclimation for 8 days 40 fishes mixed sex. The gonadosomatic index gsi is widely used as a simple measure of reproductive capacity, but its validity has often been questioned. Pdf feminization of nile tilapia by water temperature 1. Fish fecundity increased with increasing fish length and weight.
Biometric parameters such as total length tl and body weight bw as well as the gonadosomatic index gsi, the hepatosomatic index hsi, the stomach repletion index sri, and condition factor k are important to evaluate the way the species get resources from the habitat. Live weight of female clarias garepinus and heterobranchus longifilis catfish can be predicted with their body measurement especially standard length and the total length, while reproductive indices of male clarias garepinus and heterobranchus longifilis catfish can be used to predict the gonadosomatic index. Female gsis were greater at 22 and 28 c than at 31 c, as well as being higher under the 15 h. Inaccuracies in routinely collected atlantic herring. Abstract the gonadosomatic index gsi and fecundity of the threatened cirrhinus reba hamilton was studied over a period of one year from january to december 2015 in the ganges river northwest bangladesh. Gsi io2 x wgw where wg is the weight of the gonads in grams, and w the total weight of the fish nongutted. Andrew bay, florida, collected in july and september 2006. Roy a, hossainms, rahman ml, salam ma, ali mm 2014fecundity and gonadosomatic index of glossogobius giuris hamilton, 1822 from the payra river, patuakhali, bangladesh. Gonadosomatic index gsi of the control and treatment group were respectively 0.
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