scholarly journals Morphometric and meristic characteristics of an endemic Lagusia micracanthus Bleeker, 1860 in the rivers of Maros and Wallanae Cenrana Watersheds

2020 ◽  
Vol 20 (2) ◽  
pp. 189
Author(s):  
Muhammad Nur ◽  
M.Fadjar Rahardjo ◽  
Charles P.H. Simanjuntak ◽  
Djumanto Djumanto ◽  
Krismono Krismono
Keyword(s):  
Standard Length ◽  
Function Analysis ◽  
Meristic Characters ◽  
Body Depth ◽  
Morphometric Characters ◽  
Fin Ray ◽  
Morphometric Features ◽  
Significant Difference ◽  
Meristic Variation ◽  
Peduncle Length

Pirik (Lagusia micracanthus Bleeker, 1860) is one of endemic fishes in Sulawesi. Morphometric and meristic information of Pirik population in various habitats are unknown. The present study aimed to determine the morphometric and meristic variation of Pirik in Maros and Wallanae Cenrana watersheds. Sampling collection was carried out monthly from May 2018 to April 2019 in the Maros watershed, namely Pattunuang River (M1), Bantimurung River (M2), Pucak River (M3); and in Wallanae Cenrana watershed particularly in Camba River (W1), Sanrego River (W2), and Ompo River (W3). Morphometric measurements consisted of 31 characters and meristic measurements consisted of 10 characters. Morphometric data was standardized by dividing all morphometric characters by standard length (SL). Analysis of variance (ANOVA) and discriminant analysis (Discriminant Function Analysis) were applied for data analysis. The results showed that the Pirik taken from rivers in the Maros and Wallanae Cenrana watershed are two different population groups. There are 12 distinguishing morphometric features for Pirik of the Maros and Wallanae Cenrana watershed, i.e. TL (total length), SL (standard length), BDdSA (body depth-dorsal fin origin), HL (head length), Jlup (upper-jaw length), PAfL (pre-anal fin length), ABL (Anal fin base length), PelRL (pelvic ray length), AFRL (anal fin ray length), CPL (caudal peduncle length), CLLup (upper caudal lobe length) and CLLmid (mid-caudal length). There is no significant difference of meristic characters of Pirik obtained from the Maros and Wallanae Cenraa watersheds.

scholarly journals Morphological Divergence of Snow Trout (Schizothorax Richardsonii, Gray 1932) from Rivers of Nepal with Insights from a Morphometric Analysis

2015 ◽  
Vol 3 (3) ◽  
pp. 464-473
Author(s):  
Suresh Kumar Wagle ◽  
Neeta Pradhan ◽  
Madhav Kumar Shrestha
Keyword(s):  
Size Variation ◽  
Principal Component ◽  
Head Region ◽  
Body Depth ◽  
Morphometric Characters ◽  
Significant Difference ◽  
Snow Trout ◽  
Major River ◽  
Mean Vectors ◽  
Schizothorax Richardsonii

Asala or snow trout (Schizothorax richardsonii, Cyprinidae), one of highly valued freshwater fish of Transhimalayan regions, is distributed in upper reaches of all major river systems of Nepal. Morphometric diversification between six river populations of S. richardsonii was examined to identify intraspecific unit for enabling better management of the resources. Significant differences were observed in 17 measured morphometric characters of 207 specimens among the six river populations. Multivariate analysis of variance (Wilks' test) indicated a significant difference for mean vectors of mophometric measurements (? =0.012, F85, 731 = 19.999, P<0.0001) among populations. Principal component and discriminant functions (DFs) analysis of morphometric measurements revealed high seperation of the stocks. The analysis showed that most of the shape and size variation among these populations occurs in the head region, body depth and fin length. Apparent morphometric divergence among S. richardsonii samples showed the existence of three differentiated groups viz., the Indrawati and Khudi populations, the Melamchi and Phalaku Rivers, and the Sabha and Tadi River populations of Nepal. The results of this study may be useful in fisheries management and potential exploitation of this species in coldwater aquaculture.Int J Appl Sci Biotechnol, Vol 3(3): 464-473

Meristic variation in beaked redfishes, Sebastes mentella and S. fasciatus, in the Northwest Atlantic

1982 ◽  
Vol 39 (12) ◽  
pp. 1664-1685 ◽  
Author(s):  
I-H. Ni
Keyword(s):  
Cluster Analysis ◽  
Geographic Variation ◽  
Meristic Characters ◽  
Northwest Atlantic ◽  
Depth Variation ◽  
Dorsal Fin ◽  
Fin Ray ◽  
Fin Rays ◽  
Meristic Variation ◽  
Sebastes Mentella

The distribution of Northwest Atlantic beaked redfishes, Sebastes mentella and S. fasciatus, has been confused for the past several decades. Sebastes fasciatus has been reported as having lower meristic counts than S. mentella. Meristic elements of 33 301 vertebrae, 22 622 anal fin ray, and 16 290 dorsal fin ray counts were utilized to examine the yearly, depth, and geographic variation of meristics in beaked redfishes. Data collected from specimens caught off West Greenland, Baffin Island, Labrador, Newfoundland, Quebec, and Nova Scotia were analyzed by 100-m-depth intervals. Temporal and depth variation were examined by the χ2-test of independence on meristic frequencies. Geographic variation was evaluated using the modes and mean values in the meristic frequency histograms. Cluster analysis of meristic frequencies displayed the dendrographic affinities and the distance matrix among division–depth blocks.Temporal variation indicated a mixture of vertebral frequency patterns which varied with depth and area. Depth variation and geographic clines were found for each of these meristic characters; the shallow and southern waters were dominated by counts of 29, 14–13, and 7 for vertebrae, dorsal fin rays, and anal fin rays, respectively, whereas deep and northern waters were dominated by 30, 15–14, and 8–9. These results suggested that S. fasciatus occurs on the Nova Scotian Shelf and Grand Bank whereas S. mentella is largely found in Baffin Bay, Labrador waters, and the Gulf of St. Lawrence. The common names of S. mentella and S. fasciatus are discussed. Additionally, five hypothetical stocks of beaked redfishes based on meristic patterns are proposed for management purposes.Key words: Sebastes mentela, S. fasciatus, redfish, meristic variation, distribution, cluster analysis

scholarly journals Otolith measurements to estimate standard length of gobiid fish (Teleostei: Gobiiformes) from the Persian Gulf and Oman Sea

2020 ◽  
Vol 67 (4) ◽  
Author(s):  
Mahdi Iranmanesh ◽  
Majid Askari Hesni ◽  
Mohammadreza Lashkari
Keyword(s):  
Standard Length ◽  
Persian Gulf ◽  
Regression Equations ◽  
Gobiid Fish ◽  
Morphometric Characters ◽  
Oman Sea ◽  
Significant Difference ◽  
The Persian Gulf ◽  
Periophthalmus Waltoni ◽  
The Relationship

The relationship between morphometric characters (length, weight and height) of otolith and fish standard length was determined for six intertidal gobiid species from the northern Persian Gulf and Oman Sea. A total of 144 sagittal otoliths were extracted and anlysed from Periophthalmus waltoni, Boleophthalmus dussumieri, Scartelaos tenuis, Istigobius ornatus, Bathygobius meggitti and Trypauchen vagina. Regression equations were derived and found that there is no significant difference in regression coefficients between left and right otoliths of the species studied. Results of the study showed that otolith length (OL) and height (OH) could estimate standard length in all the species studied except in T. vagina, where the otolith weight gave the best estimate of standard length. Results clearly indicated that otolith dimensions of the gobiid fishes studied could provide information about the species and size.

scholarly journals Biometric study of the deep bodied mahseer Tor tor (Hamilton Buchanan) from Ujh River, Kathua (J&K)

2021 ◽  
Vol 16 (3) ◽  
Author(s):  
Monika Bansal ◽  
Ankush Sharma ◽  
Ram Krishan ◽  
Rajesh Kumar ◽  
Koshal Kumar ◽  
...  
Keyword(s):  
Standard Length ◽  
Head Length ◽  
Body Parts ◽  
Monthly Basis ◽  
Body Depth ◽  
Morphometric Characters ◽  
Total Length ◽  
Eye Diameter ◽  
Tor Tor ◽  
External Body

Morphometric characters and meristic count of a fish, Tor tor (Hamilton Buchanan) have been studied from river Ujh, a tributary of river Ravi in District Kathua, (J&K). Collection of samples on monthly basis was conducted for the study of morphological characters of Tor tor. Present study shows some deviations with respect to few morphometric characters and meristic counts that have been aptly discussed in the following discussion. The positive correlation has been observed between total length and external body parts. The highly strong correlated body parameter in relation to total length is standard length (r = 0.98) and least correlated with eye diameter (r = 0.32) and the highly correlated external body part in relation to standard length is caudal length (r = 0.96) and least correlated part is eye diameter (r = 0.35) and also strong correlation was observed between head length and maximum body depth (r = 0.93) and least correlation between head length and eye diameter (r = 0.23). The correlation analysis shows that all the morphometric characters change proportionally with increase in the total length. These results act as baseline data on morphometry of Tor tor which helps in easy identification and will be beneficial for the development of conservational strategies of the natural stocks of Tor tor in river Ujh, Kathua (J&K).

Revision of the diagnostic characters of two morphologically similar snook species, Centropomus viridis and C. nigrescens (Carangiformes: Centropomidae)

Zootaxa ◽  
2021 ◽  
Vol 4915 (3) ◽  
pp. 326-338
Author(s):  
JUAN MANUEL MARTÍNEZ-BROWN ◽  
JAIME NAVARRO-FLORES ◽  
FRANCISCO JAVIER GARCÍA-RODRÍGUEZ ◽  
LEONARDO IBARRA-CASTRO ◽  
CARMEN ELVIRA VARGAS-PERALTA ◽  
...  
Keyword(s):  
Morphological Character ◽  
Molecular Data ◽  
Genetic Identification ◽  
Morphological Similarity ◽  
Meristic Characters ◽  
Morphometric Characters ◽  
Dorsal Fin ◽  
Fin Ray ◽  
Gas Bladder ◽  
External Character

Historically, the taxonomic identification of the two snook species, Centropomus viridis and C. nigrescens, has been challenging due to their morphological similarity and the inconsistency of the characters used for diagnosis. Therefore, this study aimed to evaluate the usefulness of the morphologic, meristic, and morphometric characters currently being used to identify C. viridis and C. nigrescens, based on molecular data. The results showed that the gas-bladder shape (i.e., C. viridis with diverticula and C. nigrescens without diverticula) was the only morphological character univocally related to genetic identification. Likewise, geometric morphometrics separated two groups; each corresponds to only one of two genetically (and gas bladder shape) identified species. Of all the meristic characters examined, only the second dorsal fin ray count (nine for C. viridis and ten for C. nigrescens) was related to the gas bladder shape and genetic identity; therefore, it is the only external character with a diagnostic utility to separate each species. 

Utility of Meristic and Morphometric Characters for Identification of Capelin (Mallotus villosus) Stocks in Canadian Atlantic Waters

1978 ◽  
Vol 35 (1) ◽  
pp. 124-130 ◽  
Author(s):  
Joan C. Sharp ◽  
Kenneth W. Able ◽  
William C. Leggett ◽  
James E. Carscadden
Keyword(s):  
Mallotus Villosus ◽  
Meristic Characters ◽  
Body Depth ◽  
Morphometric Characters ◽  
Lawrence Estuary ◽  
Grand Banks ◽  
Capelin Mallotus Villosus ◽  
Statistical Separation ◽  
And Migration ◽  
St Lawrence Estuary

Multivariate discriminant function analyses were performed on 9 morphometric and 11 meristic characters of capelin (Mallotus villosus) samples at Île aux Coudres in the St. Lawrence estuary; Sept Îles, Natashquan, and Grande Rivière in the Gulf of St. Lawrence; Southeast Shoal on the Grand Banks; and Herring Neck, Notre Dame Bay, Newfoundland. Analyses of meristic characters provided no evidence of discrete stocks. Analyses of morphometric characters provided strong statistical separation between areas. A posteriori classification of groups yielded 93.1% correct classification for males and 73.3% for females. Only snout length, eye diameter, head length, and body depth contributed significantly to the separation obtained. These findings suggest that meristic characters offer little potential for stock identification in Canadian Atlantic waters. Morphometric characters may prove useful, but further study, corroborated with life history and migration data, is required to confirm this. Key words: capelin, Mallotus villosus, meristics, morphometrics, stock separation, Gulf of St. Lawrence, Newfoundland, Canadian Atlantic, multivariate analysis

scholarly journals Morphometric and Meristic Analysis of Sillaginopsis panijus Along with Seasonal Variation from Rupnarayan River, West Bengal, India

2021 ◽  
Vol 14 (4) ◽  
pp. 1737-1745
Author(s):  
Monalisa Malik Mukherjee
Keyword(s):  
Dissolved Oxygen ◽  
Fishery Management ◽  
West Bengal ◽  
Natural Habitat ◽  
Species Abundance ◽  
Morphological Characteristics ◽  
Meristic Characters ◽  
Morphometric Characters ◽  
Significant Difference ◽  
Sustainable Fishery

Present study is a first-time report of flathead Sillago, Sillaginopsis panijus (Hamilton, 1822), from Rupnarayan River of West Bengal. Seasonal sampling performed from January 2019- February 2020 by collection of water sample and fish sample in the morning time 5.00 A.M. – 8.00 A.M. A total of 116 specimens of Sillaginopsis panijus (Hamilton, 1822) were collected from four different sampling stations of Rupnarayan river (22.23°N 88.03°E to 22.40°N 87.36°E), West Bengal, India. Present work is a morphometric and meristic data analysis has been provided in detail. Total 23 morphometric characters and 13 meristic characters were analyzed. Morphological characteristics of the species were present to confirm the occurrence and distribution of Sillaginopsis panijus (Hamilton, 1822) along the riverine water of Rupnarayan. The physico-chemical parameters of water have been measured such as temperature of water, dissolved oxygen, pH and salinity. The statistical analysis of multivariate test with post-Hoc analysis and correlation were established with the abundance of S. panijus (Hamilton, 1822) in relation to water parameters. The result shows the dissolved oxygen, temperature, pH and salinity played a most important role in the distribution of S. panijus (Hamilton, 1822). The result shows a statistically significant difference in distribution of fish species, F (12, 8) =18.86, p<0.0005; Wilk’s Λ=0.001, partial η2=0.966. Present study certainly provides the baseline information of Sillaginopsis panijus (Hamilton, 1822) from the Rupnarayan river of West Bengal, India. This record of Sillaginopsis panijus (Hamilton, 1822) may assist the fishery scientist, researchers, policy planners and conservationists to develop sustainable fishery management. Therefore, this study was considered as a first step on morphometric characters for its development and documenting the extension of the distribution and ecological changes in its natural habitat which helps to conserve this species abundance in this area and prevent overexploitation.

scholarly journals Length-weight relationship, morphometric characters, and meristic counts of the coldwater fish Crossocheilus diplochilus (Heckel) from Dal Lake

2021 ◽  
Vol 29 (1) ◽  
pp. 29-34
Author(s):  
Muzamil Sidiq ◽  
Imtiaz Ahmed ◽  
Yahya Bakhtiyar
Keyword(s):  
Growth Rate ◽  
Body Size ◽  
Correlation Analysis ◽  
Standard Length ◽  
Fork Length ◽  
Meristic Characters ◽  
Morphometric Characters ◽  
Dal Lake ◽  
Total Length ◽  
Meristic Counts

Abstract Morphometric and meristic characters are very important for the identification of any fish specimen. The present study aims to describe the morphometric and meristic characters of the indigenous fish Crossocheilus diplochilus (Heckel) from Dal Lake. This fish is commonly known as Kashmir latia and is called tether locally. In the present study, the material analyzed was 70 specimens ranging in size from 6.9–13 cm (TL) with a mean length of 10.8 cm and a weight range of 3.2–24.0 g with a mean weight of 10.1 g. The parameters with the highest correlations with total length were standard length and fork length at 0.983 and 0.989, respectively. Correlation analysis showed that all morphometric characters changed proportionally as total length increased. The meristic counts analyzed in the present study remained constant in fish of different sizes indicating that they are independent of body size. The study of morphometric characters is very important to determine the growth rate of these fish, which, in turn, is required to properly manage its populations.

scholarly journals Sexual dimorphism in black jaw tiliapia (Sarotherodon melanotheron) and banded jewelfish (Hemichromis fasciatus) from the Great Kwa River, Calabar, Nigeria

2017 ◽  
Vol 75 (4) ◽  
pp. 122-131
Author(s):  
Oju Richard Ibor ◽  
George Eni ◽  
Andem Bassey Andem ◽  
Akanimo Joseph ◽  
Azubuike Victor Chukwuka
Keyword(s):  
Sexual Dimorphism ◽  
Discriminant Function ◽  
Discriminant Function Analysis ◽  
Standard Length ◽  
Function Analysis ◽  
Gonad Weight ◽  
Pectoral Fin ◽  
Body Depth ◽  
Sarotherodon Melanotheron ◽  
Fin Length

AbstractIn this study, the pattern and magnitude of sexual dimorphic differences have been investigated in black jaw tilapia (Sarotherodon melanotheron) (n = 160; 74 males and 86 females) and banded jewelfish (Hemichromis fasciatus) (n = 120; 42 males and 78 females) from the Great Kwa River, Calabar, Nigeria. Fish samples were collected between July and December 2015. Fourteen morphometric variables, including body weight, total length, standard length, body depth, cheek depth, pre-orbital length, postorbital length, pectoral fin length (right and left), pelvic fin length (right and left), head length, gonad weight, eye diameter and four meristic variables, including number of pectoral fins (right and left) and number of pelvic fins (right and left), were taken using standard methods. Size-adjusted morphometric measurements subjected to step-wise discriminant function analysis were used to determine predictor variables to morphologically differentiate sexes for both species; magnitude of dimorphism between sexes was estimated using percentage classification accuracy of the discriminant function analysis. From the discriminant function analysis, the pectoral fin length and gonad weight positively contributed significantly to morphometric dimorphism (magnitude=69.2%) in male and femaleS. melanotheronsuggesting adaptation for reproductive function; while forH. fasciatusthe body depth and standard length were important contributors to sexual dimorphism (magnitude=84.2%) suggesting size dimorphism for aggressiveness, territorial behavior and improving swimming performance. Overall, our results indicate that the different magnitude of sexual dimorphism between the two species could be attributable to the type and functional role of sexual dimorphic traits.

scholarly journals Morphometric variation of the horseshoe crab Tachypleus gigas (Xiphosura: Limulidae) from the Banyuasin estuarine of South Sumatra, Indonesia

2021 ◽  
Vol 22 (11) ◽  
Author(s):  
Fauziyah FAUZIYAH ◽  
APON Z. MUSTOPA ◽  
FATIMAH FATIMAH ◽  
ANNA I. S. PURWIYANTO ◽  
ROZIRWAN ROZIRWAN ◽  
...  
Keyword(s):  
Horseshoe Crab ◽  
Stock Assessment ◽  
Function Analysis ◽  
Principal Component ◽  
Growth Patterns ◽  
The Body ◽  
Morphometric Variation ◽  
Morphometric Characters ◽  
Morphological Studies ◽  
Significant Difference

Abstract. Fauziyah, Mustopa AZ, Fatimah, Purwiyanto AIS, Rozirwan, Agustriani F, Putri WAE. 2021. Morphometric variation of the horseshoe crab Tachypleus gigas (Xiphosura: Limulidae) from the Banyuasin estuarine of South Sumatra, Indonesia. Biodiversitas 22: 5061-5070. Morphological studies are essential for fish resource management, ecology, conservation, and stock assessment. This research was conducted to characterize the morphological variation of the coastal horseshoe crab (Tachypleus gigas) from the Banyuasin estuarine, South Sumatra, Indonesia. The body weight (BW), prosoma width (PW), carapace length (CL), telson length (TEL), and total length (TL) were measured for describing the morphometric variability of T. gigas. A total of 70 T. gigas (32 females and 38 males) were found using trammel net fishing and bottom gillnet during the survey. Multivariate and allometric methods analyzed their morphometric characters. Based on Kruskal- Wallis tests, the result showed a significant difference in somebody measurements (TL and CL) between males and females. The principal component analysis (PCA) results showed that all morphometric characters had a strong correlation in both sexes, so the first principal component (PC1) values were 92% and 72%. In comparison, the second principal component (PC2) values were 5% and 20% in females and males, respectively. The results of discriminant function analysis (DFA) suggested that only one (BW) of the five morphometric characters was significant in separating both sexes. Both sexes were also revealed variations in growth patterns based on the allometric analysis results. These results were expected to be used as a basis for managing the horseshoe crab population-based conservation.

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