Meristic characters of fish pdf

Although zebrafish Danio rerio is a highly studied organism on many fields of research, many aspects of its basic biology still elude the scientific community. Its response to temperature - especially developmental one - has been very scarcely studied and this is an important lack of knowledge since the species is considered quite eurythermal in nature. Morphometric and meristic characters were explored. Body shape and almost all of the meristic characters studied were significantly affected by the temperature applied during the first stages of development.

Zebrafish juveniles, as shown in this study, exhibit highly variable phenotypes phenotypic plasticity induced by diverse thermal conditions during their early ontogenetic stages possibly in order to successfully adjust to different environments. This is a preview of subscription content, log in to check access. Rent this article via DeepDyve. Aquac Int 12 6 — J Exp Biol 24 Amsterdam A, Hopkins N Mutagenesis strategies in zebrafish for identifying genes involved in development and disease.

Trends Genet — Axelrod H, Schultz L Handbook of tropical aquarium fishes. McGraw-Hill, New York, p Aquaculture 3—4 — Dev Dyn 3 — Blaxter J The effect of temperature on larval fishes. Neth J Zool 42 3 — J Sea Res 50 2—3 — Corti M, Loy A, Cataudella S Form changes in the sea bass, Dicentrarchus labrax Moronidae: Teleosteiafter acclimation to freshwater: an analysis using shape coordinates.

Environ Biol Fish 47 2 — Dentry W, Lindsey C Vertebral variation in zebrafish Brachydanio rerio related to the prefertilization temperature history of their parents. Can J Zool 56 2 — J Fish Biol 50 5 — Zebrafish 4 1 — J Fish Biol 56 5 — Fowler J Control of vertebral number in teleosts-an embryological problem.

meristic characters of fish pdf

Q Rev Biol 45 2 — Accessed at 7 June Fuiman L, Batty R What a drag it is getting cold: partitioning the physical and physiological effects of temperature on fish swimming. J Exp Biol 12 J Fish Biol 70 1 — Environ Biol Fish 58 1 — Harder W Anatomy of fishes. Schweizerbart, Stuttgart. Sci Mar 60 2—3 — J Fish Biol 61 5 — Johnston IA Temperature influences muscle differentiation and the relative timing of organogenesis in herring Clupea harengus larvae.To browse Academia.

Skip to main content. Log In Sign Up. Indian Journal of Applied Research, Deepak Samuel. Edwin Prabakaran R. Jeyasingh Thompson V. Observation on minute meristic characters such as Spine Count and Ray Count were obtained for each fish and the observed values were cross verified with details pertaining to fish biology from earlier work as a confirmatory test.

Introduction 2. It has a wide distribution in the 5. Though 6. An attempt is made in this paper to study 7. Length and weight measurements can give infor- mation on the stock composition, life span, mortality, growth 9. Morphological characters, such as body shape and Hence this paper is an attempt to study the mor- phometric and merisitic characters of the Threadfin Bream Materials and Methods Samples were collected randomly from bottom trawl of The The values of the param- 3.

meristic characters of fish pdf

Here W is the total weight and L is the total en as Figure 1, Figure 2, length of the fish. Descriptive statistics namely the minimum and the maximum values are obtained for each of the variables under consideration. Using correlation matrix the scatter plot was generated to see the correlation between each of the 15 meristic characters with total length.

The 16 meristic growth characters that were analyzed for the comparisons are as follows: 1. From length. Thus the increase in the total length of the fish is Figure 3 and Table 2 it is observed that when total length followed by increase in those 10 variables. These six measurements do not display significant correlation when compared to total length.

This 4. Discussions indicates that the effect of body length had been success- The exact relationship between length and weight differs fully removed from the allometric transformation in the case among various species of fish according to their inherited of the 6 variables namely Eye Diameter EDPost Orbital body shape, and within a species according to the condition Length POLDorsal Fin Spine Length Minimum DFL minrobustness of individual fish. This finding is condition is variable and dynamic, as individual fish within similar to the analysis carried out for horse mackerel Trachu- the same sample may vary considerably, and the average rus mediterraneus Turan, Morphometric and meris- condition of each population varies seasonally and yearly.

The Threadfin Breams and McCarty They concentrated on minute merisitic come under the order Perciformes, family Nemipteridae and characters like number of branchiostegal rays, number of thus sex and gonad development becomes important in this gill rakers and snout bluntness index.

For the present study, family. Research on close or minute characters, unique to a more focus was on the dorsal spine max and dorsal spine particular species, leads to micro taxonomic findings.

These min to draw a correlation between the body length and 6 findings in turn are salient precursors for future research. It is recommended that the assumed theoretical value length of the fish in the present study.Atiqullah Khan 2M.

Zaheer Khan 2.

Cartilaginous Fish / Elasmobranch & Bony Fish FOR class 11/ 12 /NEET / AIIMS By DR. KAMLESH NARAIN

In morphometry of Pomadasys maculatu sthe total length was recorded as 79 mm to mm while mean total length was Mean body weight in male was Mean value of Head length in percentage of total body length was found to be In female specimens the mean value of Head length in percentage of total body length was found to be The meristic characters like dorsal fin rays, anal fin rays, Lateral line scales, gill rakers on lower arm and scales in transversal line were counted.

No sexual dimorphism was found in Pomadasys maculatus. In the present study the average total length of females were Keywords: morphometric, meristic characters, Pomadasys maculatus, Karachi coast, Pakistan. DOI: Grunters Family: Haemulidae are small to medium sized fishes, usually inhabiting shallow coastal waters. They occur in coral reef areas, as well as in muddy or weedy waters. Grunts are commonly found in marine and brackish water Indian, Pacific and rarely in fresh water.

Several of the species belonging to this family are rather common in. Genus Pomadasys consist of 25 species.

meristic characters of fish pdf

Pomadasys maculatu s Figure 1 is one of the important Grunt fish of Karachi coast, found in coastal waters over sand near reefs. Pomadasys maculatu s has many Synonymised names like; Anthias maculatusLutjanus maculatusPomadasys maculataPomadasys maculatumPristipoma caripa.

From Pakistan only few reports on different Pomadasys species have been made [] [ 2 ]. Practically, no work has been under taken on Morphometric and meristic characteristics of Pomadasys maculatum from. Since these information are vital for the proper management of the fisheries and for optimum utilization of the resources, the present study was therefore, under taken.

The coast was the study area for this research. Samples of Pomad asys maculatus Figure 1 were collected fortnightly from fish harbors of West Wharf and Korangi Creek of Karachi coast. The fish was identified by using the Bianchi, [ 1 ]. Simple random sampling technique was used. A total of samples collected during the study period. PowerPoint Slide. Larger image png format. View current figure in a new window. View previous figure. The specimens were brought out of the deep freezer and allowed to thaw and the body length was measured using a one-meter measuring board graduated in mm.

LEye diameter E. For precision of measurement, divider and measuring board having graduation in mm was used. The morphometric parameters were measured from left side of each specimen.To browse Academia. Skip to main content. Log In Sign Up. Bipu khajuria. Animal, Veterinary and Fishery Sci. Different samples of mahseer were examined for the study of morphometric and meristic count. Some deviations, with regard to a few morphometric parameters and meristic count have been observed that have been duly discussed in the following discussions.

Positive correlation has been observed between total length and external body parts. Thus, population appeared to be relatively uniform in all the characters examined, thus following an isometric pattern.

Keywords: Tor putitora, meristic count, morphometric characters and isometric growth. It is considered an Length Group I 8cm — 12 cm important game fish by anglers1 and inhabits the montane and Length Group II 12 cm — 16 cm submontane regions, streams and rivers in mid hills stretch of Length Group III 16 cm — 20 cm Himalayan region.

Identification of a species one of the important and authentic Result and Discussion step of research works for identifying a specimen 2. These A total of 60 specimens ranging from 9. It is also suitable study for recognising the used for morphometric and meristic studies. All the degree of reproductive maturation without sacrificing the morphometric parameters of Tor putitora revealed a animal.

Morphometric studies are not only essential to proportional increase in total length of fish under study in all understand the taxonomy but the variation in its features are three groups as shown in table 3.

The morphometric ratio probably related to the habit and habitat among the variants in measured among all the three length groups showed isometric this species4. The present study is designed with objective to growth with increasing body length. A partly change in growth analyse these measurements for Tor putitora. Similar results have been reported by Hazarika et al. Apart, our Jhajjar stream Tributary of river Chenab of Jammu. During observations are also in accordance with those made by Zafar et this period monthly sampling of fishes was carried out with the al.

A total of 60 specimens of mahseer were collected from different sections of Jhajjar stream. All the characters were measured to the nearest Since all the parameters are almost constant in all the length millimetres and weighed on electric balance to nearest gram. All groups of fish with different body length, therefore conclude that counts and measurements are taken following Day 5 and meristic count is independent of body length.

Interestingly, one Jayaram 6,7,8. The fishes were categorised into three groups major meristic character i. DFR exhibit a sharp deviation from accordingly on the basis of their total length as shown in table 1 those recorded by Zafar et al. A positive correlation table-5 is found in all negatively correlated 0. The most highly correlated body Table-2 Abbreviations of morphometric and meristic characters S. Table-5 References Morphometric relationship between total length and other external morphological features 1.

Shrestha T. Nayman, Growth and ecology of fish population, J. Naeem M. Cavalcanti M. Day F.

Morphometric and meristic characters of fishes

Jayaram K. Hazarika A. Seema Langer and Prof.Create an AI-powered research feed to stay up to date with new papers like this posted to ArXiv.

Skip to search form Skip to main content You are currently offline. Some features of the site may not work correctly. Morphometric characters and meristic count of a fish, Crossochelius latius latius Hamilton-Buchanan have been studied from Ranjit Sagar Wetland.

Monthly sample collection of Crossochelius latius latius was conducted for the study of morphometric characters and meristic counts. Eighteen characters have been studied in percentage of total fish length from which thirteen characters were genetically controlled, four characters were intermediate and one character was environmentally controlled.

Alternate Sources. Save to Library. Create Alert. Launch Research Feed. Share This Paper. Figures and Tables from this paper. Figures and Tables. Citations Publications citing this paper. Nautiyal Characterization of four red hybrids tilapia Oreochromis sp. References Publications referenced by this paper. Mahseer in Lacustrine Waters, Gobindsagar Reservoir. Morphometry of Tor putitora.

Sandhu In P. Nautiyal Eds.Atiqullah Khan 2 and M. Zaheer Khan 2. Cite this paper: Amtyaz Safi, M. Atiqullah Khan and M. Zaheer Khan. American Journal of Marine Science. Abstract In morphometry of Pomadasys maculatu sthe total length was recorded as 79 mm to mm while mean total length was Mean body weight in male was Mean value of Head length in percentage of total body length was found to be In female specimens the mean value of Head length in percentage of total body length was found to be The meristic characters like dorsal fin rays, anal fin rays, Lateral line scales, gill rakers on lower arm and scales in transversal line were counted.

No sexual dimorphism was found in Pomadasys maculatus. In the present study the average total length of females were Keywords: morphometric meristic characters Pomadasys maculatus Karachi coast Pakistan.

This work is licensed under a Creative Commons Attribution 4. Search Login E-alert. Journals A-Z. All Subjects. Free Journals. Open Access. Journal Browser. Issue 2, Volume 2. Article Metrics. Export Article.Meristics is an area of ichthyology which relates to counting quantitative features of fishsuch as the number of fins or scales.

A meristic countable trait can be used to describe a particular species of fish, or used to identify an unknown species. Meristic traits are often described in a shorthand notation called a meristic formula. Meristic characters are the countable structures occurring in series e. These characters are among the characters most commonly used for differentiation of species and populations.

In the salmonidsscale counts have been most widely used for the differentiation of populations within species. In rainbow and steelhead trout the most notable differences among populations occur in counts of scales. Meristic characters are used in many other fields, such as in botany or in zoology. Meristic comparison is used in phenetic and cladistic analysis.

A meristic study is often a difficult task, as counting the features of a fish is not as easy as it may appear. Many meristic analyses are performed on dead fish that have been preserved in alcohol. Meristic traits are less easily observed on living fish, though it is possible.

On very small fish, a microscope may be required. Ichthyologists follow a basic set of rules when performing a meristic analysis, to remove as much ambiguity as possible. The specific practice, however, may vary depending on the type of fish. The methodology for counting meristic traits should be described by the specialist who performs the analysis.

Canadian Journal of Fisheries and Aquatic Sciences

This a shorthand method of describing the way the bones rays of a bony fish's fins are arranged, comparable to the floral formula for flowers. Spine counts are given in Roman numerals, e. Ray counts are given in Arabic numerals, e. This means the fish has 14 spiny rays bones in the first part of its dorsal fin Dfollowed by 10 soft rays.

A means the Anal fin, P means Pectoral fins near the gills and eyes where 'arms' would beV are the ventral or pelvic fins equivalent to 'legs' C represents the caudal tailnot indicated in this example. GR is gill raker count see below.

The number of bones in the backbone is a feature which can also be used to classify fish species. Usually all the vertebrae are counted. Vertebral counts may be split into abdominal those associated with the body cavity and caudal tail vertebrae. If there are sutures in the urostylecomponents are counted, otherwise the urostyle is usually counted as one vertebra. The number of gill rakers on the first gill arch can also be used to identify a fish species.

Rakers are counted for the upper and lower limbs of the gill arch, and a raker at the joint of the upper and lower limbs is counted as of the lower. From Wikipedia, the free encyclopedia. Retrieved 16 May Fish anatomy Fish physiology Age determination Anguilliformity Bone dermal intramembranous ossification Cleithrum Chromatophore Fins dorsal fin Gill branchial arch gill raker gill slit pharyngeal arch pharyngeal slit pseudobranch Glossohyal Jaw hyomandibula pharyngeal jaw Leydig's organ Mauthner cell Meristics Operculum papillare Papilla Photophore Root effect Shark cartilage Scales ganoine Spiral valve Suckermouth Swim bladder physoclisti physostome Teeth pharyngeal teeth shark teeth Teleost leptins Digital Library.

Fish locomotion Fin and flipper locomotion Amphibious fish Walking fish Flying fish Undulatory locomotion Tradeoffs for locomotion in air and water RoboTuna. Carp Catfish Salmonids Tilapia. Predatory fish billfish mackerel salmon tuna Forage fish anchovy herring sardine sprats Demersal fish cod flatfish pollock. Jawless fish hagfish lampreys Cartilaginous fish chimaeras sharks rays Bony fish spiny-finned fleshy-finned.

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