Parastichopus californicus stimpson, 1857 from the san. While gonado somatic index is the ratio of fish gonad weight to body weight. Here, we propose using the gonadosomatic index gsi as an alternative way to estimate the maturity ogives. Sheet 2 hepatosomatic index hsi and gonadosomatic index gsi.
The live blue crabs were transferred to the laboratory to measure the following variables. 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. Low this article has been rated as lowimportance on the projects importance scale. Using the gonadosomatic index to estimate the maturity ogive. During present study two peak values of gsi were observed indicating that there are two peak periods of spawning in c. The stomach content analysis in this study distinguished the fish species into two major groups. Kolmogorovsmirnov tests found data in several cells to signi. Gonadosomatic index of fish is related to spawning and reproduction of fish. Fishery biology of the sea cucumber parastichopus californicus stimpson, 1857 from the san juan islands, washington. It measures reproductive strain of fishes by measuring general body weight ratios. Gonadosomatic index and testis morphology of common carp. The sex ratio, gonadosomatic index, diet composition and.
Pdf gonadosomatic index value in males during september march were 4. Assessing the contribution of microhabitat differences on the biological effects of endocrine active compounds in bluegill. Experimental data on behavioral, hepatosomatic, gonadosomatic. Condition factor, gonadosomatic index and sex ratio of the. Samples for researching have average body mass from 90 to 100 g and average total body length from 217 to 225 mm. Gonadosomatic index how is gonadosomatic index abbreviated. Using the gonadosomatic index to estimate the maturity. Gonad somatic index and feeding habit of selected fish species of. Puntius conchonius, oogenesis, sex ratio, hepatosomatic index, gonadosomatic index, histology. This study assessed gonadosomatic index gsi, liver somatic index lsi, intersex condition, elevated vtg levels, and fecundity indices in common carp cyprinus carpio and channel catfish ictalurus punctatus along a pollution gradient in the illinois river, illinois from the headwaters to the confluence with the mississippi river. The gonadosomatic index gsi, representing the percentage contribution of the gonads mass in relation to total body mass, was calculated for females, using the expression mcadam et al. The gonadosomatic index gsi, which is the gonad mass as a proportion of the total body mass, is useful as a tool for estimating stage of sexual maturity and for comparing reproductive output among individuals, populations, or species devlaming et al. If you do not have the adobe acrobat pdf reader, it is available for free download from adobe systems incorporated.
Reproductive anatomy, gonad development and spawning. Introduction astacus leptodactylus is a widespread species distributed throughout europe, eastern russia, and the middle east soutygrosset et al. The sex ratio, gonadosomatic index, stages of gonadal development and fecundity of sompat grunt pomadasys jubelini off lagos coast, nigeria were investigated. Fecundity is the estimation of ova content in the ovary of a. The gonadosomatic index, abbreviated as gsi, is the calculation of the gonad mass as a. Estimation of fecundity and gonadosomatic index gsi of. Gadekar gp dhote bandhu science college, gondia address for correspondence email. However, both sexes were not measured at every location in each month due to. The results obtained indicated adverse effects on the gonads as well as on liver weight. School of biological sciences, flinders university. Gonadosomatic index an overview sciencedirect topics. This is reported in terms of gonadosomatic index which express the relative change in gonad weight to the percentage of body weight.
The gonadosomatic index is the ratio of fish gonads weight to the body weight. Compare the gonadosomatic index with flow regimes encountered during the breeding season approximately aprilseptember to determine whether changes inflow patterns influence the reproductive cycles ofnotropis girardi. The testes are relatively large weir, 1974, and the gonadosomatic index testes massbody weight in the adult chinchilla is relatively high compared to most mammals, but is similar to rats and mice leal and franca, 2008. The stomach was opened for gonad examination and food content analysis. Introduction the rosy barb, puntius conchonius, is a cypriniform of the family cyprinidae and a prime candidate for tropical exotic aquarium. Pdf the sex ratio, gonadosomatic index, stages of gonadal development and. The expression used in this study was the gonadosomatic index gsi, equals both gonads weight divided by the total weight of the body.
Seasonal variations in the gonadosomatic index of an indian major carp, labeo rohita ham. The topographical characteristics of lake biwa produce a wide range of thermal conditions, which seem to be responsible for those findings. On the basis of gonadosomatic index the reproductive cycle of n. The data on sex ratio of terapon jarbua in relation to various length groups showed that 75% of female were recorded in lowest length. The chinchilla testis has a high seminiferous tubule volume and density leal and franca, 2008. At the end of the experimental period, 35 fish from each. Stub this article has been rated as stubclass on the projects quality scale. Despite its small size, lake yogo is characterized by diverse thermal conditions owing to the. Condition factor, gonadosomatic index and sex ratio of the family mormyridae from a small lake in ilorin, nigeria c. Fish gonad was taken from 15 fishes per each water type. The concentration of nonylphenol, bisphenol a and 17. Histology is the most accurate method for maturity staging but is expensive and time consuming. The aim of the present study was to evaluate the seasonal pattern of the gonadosomatic index gsi, condition factor k, and sex ratio in the catfish auchenipterichthys longimanus siluriformes.
Investigations of the effects of synthetic chemicals on. Lawal department of zoology, university of ilorin, ilorin, nigeria abstract. Gonadosomatic and hepatosomatic indices of the freshwater. A logistic multinomial model was implemented to separate immature, matureactive, and matureinactive fish. X, with x one decimal place smaller than the smallest value for each variable i. Lummi natural resources department 202015 sea cucumber study suggested citation for report. The gonadosomatic index gsi of males was small and highly variable mean 0. Gonadosomatic index of terapon jarbua based on different size groups showed a gradual increase varied from 0. Weight of the gonad g g s i x 1 0 0 weight of the fish g diameter of the eggs at different stages of maturity was measured with. Adobe systems incorporated has information about pdfs and the visually impaired. Study of gonadosomatic index of cyprinid fish, salmostoma. Gonadosomatic index and fecundity studies are useful for making total population estimates, population dynamics or productivity. Seasonal changes in the gonadossomatic index, allometric.
The sex ratio, gonadosomatic index, fecundity and diet composition of hepsetus odoe in eleyele lake, southwest, nigeria were. Gonadosomatic and hepatosomatic indices of freshwater fish. Higgs department of biological sciences, university of windsor, 401 sunset avenue, windsor, ontario, n9b 3p4, canada. Gsi and hepatosomatic index hsi of salmo trutta fario brown. The histological structure of testicular lobes showed maturing and mature stages that contained spermatocytes, spermatids, and spermatozoa. Condition factor icfi, gonadosomatic index igsil, and hepatosomatic index chsii increased significantly in the later stages of female development.
Application to chilean hake merluccius gayi gayi article pdf available in ices journal of marine science august 2014 with 1,503. Gonadosomatic index and fecundity of threatened reba carp. Findings of the present study highlighted the importance of fish,s. Gonadosomatic index was calculated as gonad percentage to the whole fish weight as the following equation. Therefore, gonadosomatic index values were used as the estimator of the stage of annual reproductive cycle, as it was not possible to determine the stage of embryonic development. The paired, beanshaped ovaries contained about 5500 oocytes 11769783 and were. Effects of carotenoids on gonadosomatic and hepatosomatic indices. Studies on the gonadosomatic index and fecundity of. Gsi gwtw x 100, in which gw gonad weight and tw fish total weight. This information provides tools to help make pdf files accessible. Auchenipteridae as an approach to identify its reproductive period. Oogenesis, hepatosomatic and gonadosomatic indexes, and. Condition factor, gonadosomatic index, sex ratio and length weight relationship of mormyrus rume. Maturityand fecundity ofarrowtooth atheresthesstomias.
The estimated parameters of the maturity ogive were significant p 0. Mortality affects adaptive allocation to growth and. Gonadosomatic index gsi of the male and female fishes of the collected samples were determined separately by using the following method. Spatial variation in reproductive measures of female. Gonadosomatic index which is an index of gonad size relative to fish size is a good indicator of gonadal development in fish 2 the percentage of body weight of fish that is used for production of eggs is determined by the gonadosomatic index. Main page contents featured content current events random article donate to wikipedia. If the inline pdf is not rendering correctly, you can download the pdf file here. The present study, we evaluated ovary maturation estimation that indicates spawning season based on gsi, hsi and proportion of oocytes stadia. Evaluating gonadosomatic index as an estimator of reproductive condition in the invasive round goby, neogobius melanostomus jeffrey n.
In a comparative analysis, the gonadosomatic index could still function as useful index of reproductive effort if different species had equal rates of allocation to given masses of somatic and reproductive tissues. Crabs from kodiak island and petrel bank were further along in the reproductive cycle than crabs from bristol bay or. Jere3 and amrit bart1 1aquaculture and aquatic resources management, asian institute of technology, po box 4, klong luang, pathumthani 12120, thailand 2current address. We also need to know whether the data are balanced before including interactions. Variations in the gonad were almost estimated with parameters such as the length of the body, the total body weight or the somatic weight28. A gonadosomatic index has the obvious limitation that it measures standingstock rather than actual rates of energy allocation. Gonadosomatic index is within the scope of wikiproject animals, an attempt to better organize information in articles related to animals and zoology. The order of toxicity is mercuric chloride mixture cadmium chloride.
Gonadosomatic index gsi, hepatosomatic index hsi and proportion of oocytes stadia related with reproduction activity and already used by researcher as an indicator of spawning season. Our previous studies have revealed that bluegill lepomis macrochirus rafinesque in lake biwa exhibit spatial variations in growth, maturation, and reproduction. The proportion of mature fish at age or length is one of the most important population attributes in assessing reproductive potential. Sex ratio and gonadosomatic index the sex ratio was expressed as the proportion of males to the total number of the 1 a working document submitted at the first meeting of the scientific committee of the western and central pacific fisheries commission, wcpfcsc1, august 8.
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