The lengthweight relationship of fish is an important fishery management tool. Lengthlength relationship, lengthweight relationship and condition factor of freshwater fish species of bangladesh. The importance of determining lengthweight relationships lwrs in fish has been emphasized by many studies. Lengthweight relationship of the whitespotted rabbitfish siganus canaliculatus park, 1797 were taken in fresh condition separately for male, female and indeterminants from the gulf of mannar region. Its importance is pronounced in estimating the average weight at a given length group and in assessing the relative well being of a fish population bolger and connoly, 1989. The length weight relationship is adequately described by the formula.
Lengthweight relationships of five fish species from the sakarya river, turkey article pdf available april 2014 with 1,483 reads how we measure reads. Length weight relationships of freshwater fish species. Analysis of covariance revealed highly significant difference p weight relationship of fish varies depending upon the condition of. Lengthweight relationship and condition factor of seven fish species. Marine and fisheries research institute, po box 325940200, kisii, kenya. Lengthweight relationship and condition factor of four. Lengthweight relationship and condition factor of five fish species from a tropical water supply reservoir in abuja, nigeria. The lengthweight relationship lwr and lengthlength relationship llr have been applied for basic uses in order to make fish stocks and population assessment ricker 1968. Condition factor k is widely used in fisheries and fish biology studies. Lengthweight relationship of some fish species in a.
Plot the lengthweight relationship of the provided fish species where yaxis weight g, and xaxis length c m. Lengthweight relationship, condition factor, fish species, reservoir citation. Moreover, this study also compared the above mentioned species of catfish were compared. Weightlength relationships for 20 fish species in the adriatic sea. Lengthweight relationship of 10 fish species caught by bottom trawl and midwater trawl from the middle black sea, turkey introduction length and weight data are useful standard results of fish sampling programs morato et al. The results of the lengthweight analyses showed that all the three fish spe cies exhibited negative allometric growth pattern with regression. Lengthweight relationships and condition factor of fish. The lengthweight relationship was observed to be significantly strong p0. Abstract age, growth, and lengthweight relationship of. A fish of normal weight has a relative weight of 100 percent.
This work was carried out to study the lengthweight relationship, and feeding selectivity of nile tilapia at different sizes in earthen ponds received organic and inorganic fertilizers. Lengthweight relationship and condition factor of pond. The lengthweight relationship of some fish species from oramiriukwa river, was studied from january to december, 2014. American journal of research communication, 20, 19. Lengthweight relationship and condition factor of rohucatla hybrid in lake udaisagar, udaipur, rajasthan gokhale gs, sharma sk, sharma bk, upadhyay b abstract rohucatla hybrid contributes significantly 14. The relationship between the length and weight of a sh is used by sheries researchers and managers for two main purposes le cren1951. Lengthweight relationships and relative condition factor. Lw relationship, tilapia, sea water, fresh water, pangani, tanzania introduction knowledge of some quantitative aspects such as lengthweight relationship is important in studying fish biology.
The log transformation formula of le cren was used to establish lwrs le cren, 1951. Lengthweight relationships and condition factors of red. This factor is calculated from the relationship between the weight of a fish and its length. Lengthweight relationship lwr and condition factor of seven fish species from the temengor reservoir, peninsular. W alb values of w usually have been calculated from the logarithmic base 10 equivalent.
Lengthweight relationship and condition factor of tilapia. The lengthweight relationship and seasonal cycle in gonad. During the study 154 fish samples including 76 females and 78 males ranging from 12. I think that the file i added is useful for calculate fish lengthweight relationship. The lengthweight relationship parameters for the seven fish species in temengor reservoir are presented in table 1. Pdf lengthweight relationship lwr parameters and fultons condition factor k were evaluated for eleven native fish species collected. The objectives of this study were to describe the lengthlength relationship llr, lengthweight relationship lwr and condition factor of four important freshwater fish species esomus danricus, amblypharyngodon mola, pethia ticto and glossogobius. Lengthweight relationship of 10 fish species caught by. In fish, size is generally more biologically relevant than age, mainly because several ecological and physiological factors are more sizedependent than agedependent. Dentex maroccanus, sparidae, lengthweight relationship, condition. In fish, size is generally more biologically relevant than age, mainly because several ecological. Lengthweight relationship and condition factor of rohu. It provides information about the growth pattern, general health, habitat conditions, life history, fish fatness and condition, as well as morphological characteristics of the fish schneider et al.
The lengthweight relationship and condition factor of. Introduction lengthweight relationship studies of fishes are considered as an important tool for understanding of fish. Lengthweight relationship and condition factor of freshwater fish tilapia mossambica anni jain askwith mary d, christina angelin p and jeyaseeli a department of zoology,st. This study was designed to investigate the growth performance, lengthweight relationship lwr and condition factor kvalue of reciprocal backcross hybrid catfish rcbc, pangasianodon gigas femalexf1 hybrid male catfish and backcross hybrid catfish bc, p. Length is a linear measure in centimeter and the weight of a fish in gram is approximately equal to its volume cubic centimeter.
The slope b values obtained in the nine species ranged from 1. The relative weight of a fish does not indicate its health on a continuous scale from 0 100%, however. The study of lengthweight relationship of amblyceps apangi is very limited in indian sub continent. Lengthweight relationship, condition factor and sex ratio. Pdf lengthweight relationships of five fish species. Combining data from the entire year produced length weight relationships with considerable variability figure 1. The most abundant species sampled were osteochilus hasseltii, cyclocheilichthys apogon, hampala macrolepidota and oxygaster anomalura which belong to cyprinidae. The slope b values regression coefficient of the lengthweight relationship varied between 2. The lengthweight equation w a l b was used to estimate the relationship between the weight g of the fish and its total length cm. Laarman, and howard gowing the relationship between total length l and total weight w for nearly all species of fish is expressed by the equation. Lengthweight relationship and condition factor african journals. A total of 1545 specimens were caught by using various mesh. The value of the regression coefficient obtained for the lengthbody weight relationship.
Lengthweight relationships are important in fisheries science, notably to raise lengthfrequency samples to total catch, or to estimate biomass from underwater length observations. The fish attained more weight per unit of length in early age 12 years in the lake. Studies on the lengthweight relationship lwr of fishes are an important tool to describe several biological aspects of the species. The lengthweight relationship and condition factor of one hundred juvenile oreochromis niloticus in sanni luba fish farm ijebuode, ogun state were investigated. Pdf a study was conducted on the fishes of ebonyi river to determine their length weight relationships lwr.
At the same time, the relationship of lengthweight estimates condition factor c. The weightlength relationship wlr is an useful tool in fish biology, physiology, ecology, and stock assessment. Pdf lengthweight relationship of some fish species in a. Lengthweight relationship and growth parameters of the. Pdf the lengthweight relationship of some fish species from oramiriukwa river, was studied from january to december, 2014. The lengthweight relationship may be expressed graphically by plotting the observed lengths and weights as a dot diagram on double logarithmic graph paper. Lengthlength relationship, lengthweight relationship and. Lwr data of fishes are useful for biologists martinsmith, 1996 in fishery assessment and proper management of their population. The results of environmental parameters are shown in. The relative weight w r of an individual fish is its actual weight divided by its standard weight, times 100%. Lengthweight relationships for 30 fish species caught in. Length weight relationship the relationship between the total length tl, cm and weight g of fish was established for m. Feeding ecology, lengthweight relationship and condition. The allometric relationship, as a proxy for fish condition, seems to be affected by seasons and sex in the northern population, while only seasons seem to have a.
Lengthweight relationship in ten fish species from the. Lengthweight relationships can be used to predict weight from length measurements made in the yield assessment pauly, 1993. Lengthweight relationship and condition factor of fish. However, as a suggested improvement, lengthweight data have been collected for the individual species by the atlantic seafood company from january 1, 2010 to september 2, 2010. Lwr data of fishes are useful for biologists martin smith, 1996 in fishery assessment and proper management of their population. The points for fish having the same lengthweight relationship will lie on a straight line with some scatter due to individual variation. Xaviers college autonomous, palayamkottai,tamil nadu 627002.