scholarly journals Morphometric and meristic characters of Otolithoides pama (Hamilton, 1822) occurring in Hooghly-Matlah estuarine system of West Bengal, India

2020 ◽  
Vol 67 (4) ◽  
Author(s):  
Dibakar Bhakta ◽  
Sudhir Kumar Das ◽  
Basanta Kumar Das ◽  
T. S. Nagesh
Keyword(s):  
Growth Rate ◽  
West Bengal ◽  
Estuarine System ◽  
Meristic Characters ◽  
Morphometric Characters ◽  
Dorsal Fin ◽  
Meristic Counts ◽  
Fin Rays ◽  
Eye Diameter ◽  
High Degree

The present study analysed the morphometric and meristic characters of Otolithoides pama (Hamilton, 1822) collected from the Hooghly-Matlah estuarine system of West Bengal, India. A total of 618 specimens (298 males and 320 female) were collected during the period of 18 months from November 2016 to April 2018 with length ranging from 100-384 mm and weight 7.29-470.71 g, respectively. The analysis of 14 morphometric characters revealed that standard length has the fastest growth rate when compared to total length, while eye diameter has the lowest growth rate when compared with head length. A high degree of significant positive correlation with the ‘r’ values ranging from 0.978 to 0.997 was observed among different morphometric characters of O. pama. Among nine of the meristic counts, the coefficient of variation was found to be highest in anal fin rays (6.31%) and minimum in dorsal fin rays (1.12%). Based on the meristic counts, the fin formula of O. pama from the present study can be described as B. 7 , D. 9-10/1/44-45, P. i/16-17, V. 1/5 , A. 2/7-8, C. 19-21, L. 48-52. The number of gill rakers on the first left gill arch ranged from 19-21.

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 New species of Eugerres from the Usumacinta Province, México and Guatemala with a redescription of E. mexicanus (Steindachner, 1863) (Teleostei: Gerreidae)

2013 ◽  
Vol 11 (2) ◽  
pp. 307-318 ◽  
Author(s):  
Adrian F. Gonzalez-Acosta ◽  
Rocio Rodiles-Hernandez
Keyword(s):  
New Species ◽  
The Body ◽  
Body Depth ◽  
Morphometric Characters ◽  
Dorsal Fin ◽  
Fin Ray ◽  
Fin Rays ◽  
Freshwater Habitats ◽  
Eye Diameter ◽  
Pelvic Fin

Eugerres castroaguirrei, new species is described from the río Grijalva-Usumacinta basin of southeastern Mexico and northern Guatemala. Eugerres castroaguirrei and E. mexicanus are distinguishable from their marine estuarine congeners by the dorsal-fin origin posterior to the insertion of the pectoral and pelvic fins, a shorter and broad based supraoccipital crest, and a distinct geographic distribution restricted to freshwater habitats. Eugerres castroaguirrei differs from E. mexicanus by diagnostic characters of the body skeleton: anterior process of supraoccipital convex, infraorbital 1 with foramen, premaxillary ascending process developed with margins curved, pharyngeal plate granular and not serially arranged, and dorsal and anal fin-rays reduced. Likewise, E. castroaguirrei is characterized by an oblong and laterally thicker body (37.6-58.5% HL); greater body depth (33.8-42.1% SL), and eye diameter (23.3-31.6% HL); in addition to 16 significant morphometric characters: length of the second dorsal-fin spine 23.2-34.2% SL; depressed second dorsal-fin spine (extending to base of third to fourth dorsal-fin rays); length of second anal-fin spine 11.1-20.6% SL, depressed second anal-fin spine extending to the base of third to fourth anal-fin rays not reaching the distal point of last anal-fin ray; pelvic-fin spine length 49.7-65.0% in the first pelvic-fin ray length

Navigobius asayake, a new species of ptereleotrine goby (Gobioidei: Microdesmidae) from Kagoshima, southern Japan

Zootaxa ◽  
2018 ◽  
Vol 4526 (3) ◽  
pp. 373
Author(s):  
MAKOTO OKAMOTO ◽  
HIROYUKI MOTOMURA
Keyword(s):  
New Species ◽  
Dorsal Fin ◽  
Southern Japan ◽  
Fin Rays ◽  
Eye Diameter ◽  
Yellow Stripe ◽  
Fin Length ◽  
A New Species ◽  
Pectoral Fin Rays ◽  
Pelvic Fin

A new species of ptereleotrine dartfish, Navigobius asayake, is described based on four specimens (45.0–52.1 mm in standard length: SL) collected from off the Satsuma Peninsula and Tanegashima island, Kagoshima, southern Japan. It is distinguished from other congeners by the following combination of characters: second dorsal-fin rays I, 18–19; anal-fin rays I, 19; pectoral-fin rays 21–22; gill rakers 5–6 + 13–15; head length 25.1–26.4% SL; eye diameter 8.6–10.0% SL; pelvic-fin length 15.2–16.1% SL; and a well-developed yellow stripe extending from behind upper part of eye to beneath first dorsal fin. 

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 Morphometric and meristic characters of snow trout, Schizothorax labiatus, inhabiting the Jhelum River and its tributaries

2020 ◽  
Vol 28 (4) ◽  
pp. 216-224
Author(s):  
Kousar Jan ◽  
Imtiaz Ahmed
Keyword(s):  
Fish Species ◽  
Fork Length ◽  
Head Length ◽  
Meristic Characters ◽  
Morphometric Characters ◽  
Total Length ◽  
Linear Relationships ◽  
Jhelum River ◽  
High Degree ◽  
Management And Conservation

Abstract Schizothorax labiatus (McClelland) is considered to be one of the most economically important fish species among Schizothorax spp. A total of twenty-four morphometric and five meristic characters were examined; 18 of the morphometric characters as percentages of total length and four characters as percentages of head length were studied. It was found that the characters of standard length, fork length, pre pelvic length, pre anal length, and pre dorsal length had the highest correlations with total length, whereas dorsal fin height followed by caudal fin height had the lowest correlations. In percentages of head length post orbital length had the highest correlation whereas snout length had the lowest correlation. Overall, the results revealed that all the morphometric characters exhibited linear relationships and depicted significantly (P < 0.05) high degree of correlation, while the meristic characters counted were constant in all sizes of S. labiatus, indicating that they were independent of body size. The study provided basic information that will be useful for fish biologists and researchers in the future management and conservation of this fish species.

Clarias gracilentus, a new walking catfish (Teleostei: Clariidae) from Vietnam and Cambodia

Zootaxa ◽  
2011 ◽  
Vol 2823 (1) ◽  
pp. 61 ◽  
Author(s):  
HEOK HEE NG ◽  
DANG KHANH HONG ◽  
NGUYEN VAN TU
Keyword(s):  
Species Complex ◽  
Head Width ◽  
Body Depth ◽  
Dorsal Fin ◽  
Fin Ray ◽  
Fin Rays ◽  
Eye Diameter ◽  
Process Length ◽  
Fin Length ◽  
Pelvic Fin

Clarias gracilentus, a new Southeast Asian walking catfish species, is described from Phu Quoc Island (Vietnam) off the coast of southeastern Cambodia and from mainland southeastern Cambodia. The new species is a member of the C. nieuhofii species complex, and can be distinguished from congeners in the complex in having a combination of: head width 11.9–12.9% SL, distance between the occipital process and the base of the first dorsal-fin ray 5.3–8.4% SL, pectoral-fin length 8.5–10.1% SL, body depth at anus 8.2–11.7% SL, pelvic-fin length 4.3–5.5% SL, length of anal-fin base 60.0–63.9% SL, eye diameter 5.4–7.2% HL, interorbital distance 42.7–48.0% HL, occipital-process length 7.8–14.7% HL, 96–101 dorsal-fin rays, 84–89 anal-fin rays and 80–84 total vertebrae.

scholarly journals Stocks Discrimination in Lady Fish, Elops machnata (Forskal, 1775) from Southeast and Southwest Coast of India Based on Morphometric and Meristic Analysis

2018 ◽  
Vol 10 (1) ◽  
pp. 8-13
Author(s):  
Muthusamy THANGARAJ ◽  
Ramachandran KUMARAN ◽  
Shanmugam CHANDRASEKAR
Keyword(s):  
Molecular Markers ◽  
East Coast ◽  
Fork Length ◽  
Indian Coast ◽  
Morphometric Characters ◽  
Southwest Coast ◽  
Dorsal Fin ◽  
Meristic Counts ◽  
Fin Ray ◽  
Pelvic Fin

Morphometric and meristic analysis of ladyfish, Elops machnata, were used to discriminate stocks along the Southeast and Southwest coast estuaries of India. Morphometric and meristic analyses showed a similar pattern of differentiation between E. machnata stocks and revealed a clear discreteness of two groups, an East coast (Marakanam, Parangipettai and Muthupettai) population and a West coast (Cochin) population. Higher total length (TL) (28.00 ± 7.043 cm), fork length (FL) (89.27 ± 2.201% TL) and standard length (SL) (81.77 ± 2.582% TL) were recorded in Cochin population and they were significantly different from the other three populations. Meristic counts were relatively homogenous in all the studied populations. No significant variation was found in counts of dorsal fin ray (DFR), anal fin ray (AFR), pectoral fin ray (PFR) and pelvic fin ray (PLFR). The first and second components (PCA analysis) accounted for about 92.2% of variation in all the morphometric characters. Among them, pre pectoral length (PPL) and pre dorsal length (PDL) showed high loading values in PC1 in all four populations. The overall random assignment of individuals to their original group was higher in morphometric than in meristic analysis. Such a presumption could be authenticated henceforth with molecular markers. Hence, further studies, using molecular markers are still required to precisely evaluate the genetic structure of E. machnata along the Indian coast.

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. 

scholarly journals Redescription and new records of Jansen’s goatfish, Parupeneus jansenii (Mullidae), from the Western Pacific and Eastern Indian Ocean

Zootaxa ◽  
2017 ◽  
Vol 4344 (3) ◽  
pp. 541 ◽  
Author(s):  
FRANZ UIBLEIN ◽  
TUAN ANH HOANG ◽  
DANIEL GLEDHILL
Keyword(s):  
Indian Ocean ◽  
New Records ◽  
Brown Spot ◽  
Depth Information ◽  
Depth Range ◽  
Meristic Characters ◽  
Morphometric Characters ◽  
Dorsal Fin ◽  
South Central ◽  
Posterior Maxilla

For Jansen’s goatfish, Parupeneus jansenii (Mullidae), taxonomic knowledge has been rather poor and occurrence information restricted to a few localities only, with verified records from northern Sulawesi and Sunda Street (Indonesia), and Luzon (Philippines). This species is here included in the so-called “heptacanthus” group together with the Indo-Pacific cinnabar goatfish, P. heptacanthus, and five Indian Ocean congenerics, based on an evenly, symmetrically rounded posterior maxilla margin and similarities in meristic characters and preserved colour. In total 29 P. jansenii and 53 P. heptacanthus consisting of types, recently collected material from south-central Vietnam, southern Indonesia, and NE Australia, and geographically related reference material were studied along with single types of the other five heptacanthus-group species and P. angulatus, a morphologically similar Western Indian Ocean species. In total 62 quantitative meristic and morphometric characters including standard length (SL) were analysed after splitting the data into two size classes (small-sized fish, < 110 mm SL, vs. large-sized fish  > 110 mm SL) to account for size-related differences due to allometry. Diagnoses for P. jansenii and P. heptacanthus and a redescription for P. jansenii were prepared. Fresh-fish colour descriptions for both large- and small-sized voucher specimens of P. jansenii are provided and the effects of freshness status on colour patterns is documented. New records for P. jansenii for Vietnam, southern Indonesia and NE Australia (= first verified record for Australia) are reported and depth information (24–100 m depth range) is given for the first time. P. jansenii differs from the co-occurring P. heptacanthus - independently of size - in shallower body and caudal peduncle, smaller maximum head depth, shorter barbels, caudal and pelvic fins, shallower first dorsal fin, shallower first ray of second dorsal fin, and lack of small dark red or reddish-brown spot on or just below the eighth lateral-line scale. The populations of P. jansenii from Vietnam and Australia differ from each other in a single character, the height of the eighth dorsal-fin ray, but both overlap with the intermediate population from Indonesia. This comprehensive alpha-taxonomic approach provides a useful tool for uncovering the diversity of Parupeneus goatfishes. 

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.

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