Morphological variations in marine pufferfish and porcupinefish (Teleostei: Tetraodontiformes) from  Tamil Nadu, southeastern coast of India

In the present study, morphological variations in 14 species of two families, Tetraodontidae and Diodontidae, were examined for individuals collected from five different centres in Tamil Nadu in the southeastern coast of India. Twenty-seven morphological measurements and four meristic characters were taken and used for multivariate analyses such as discriminant function analysis (DFA) & MANOVA. DFA revealed that the first two functions accounted for more than 75% variation between the species. Negative allometric values were observed on head length (HL), orbital length (OL), pupil diameter (PD), interorbital length (IOL), pectoral-fin length (PEL), caudal peduncle depth (CPD), dorsal to pectoral fin distance (DPFD), caudal peduncle length (CPL) and post-pectoral-fin length (POPFL) measurements. Also, MANOVA supported the DFA results. Additions, allometric relationships, and meristic variations were observed for most of these species. Moreover, this is the first attempt to describe a greater number of morphological features of the species belonging to the order Tetraodontiformes.

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Morphometric features of topmouth gudgeon Pseudorasbora parva (Temminck & Schlegel, 1846) in the Hirfanlı Reservoir, Turkey

Acta Aquatica Aquatic Sciences Journal ◽

10.29103/aa.v7i1.2030 ◽

2020 ◽

Vol 7 (1) ◽

pp. 8

Author(s):

Semra Benzer

Keyword(s):

Fork Length ◽

Pseudorasbora Parva ◽

Pectoral Fin ◽

Caudal Peduncle ◽

Morphometric Characters ◽

Topmouth Gudgeon ◽

Dorsal Fin ◽

Peduncle Length ◽

Fin Length ◽

Pelvic Fin

The aim of this study was to some morphometric characteristics of Pseudorasbora parva from Hirfanlı Reservoir, Turkey. A morphological analysis of 29 morphometric characters were performed. These characteristics head length; preorbital distance; eye diameter; postorbital distance; head depth; predorsal distance; prepelvic distance; preanal distance; pectoral fin–pelvic fin (P-V) distance; pelvic fin– anal fin (V-A) distance; body depth (18 perpendicular); dorsal fin (anterior end)-anal fin distance (Da-A); dorsal fin (posterior end)–anal fin distance (Dp-A); postdorsal distance; postanal distance; caudal (C) peduncle length (dorsal); caudal peduncle length (ventral); caudal peduncle depth; dorsal fin (D) base length; anal fin (A) base fin length; pectoral fin (P) length; pelvic (V) fin length; caudal upper lobe length; caudal fork length; caudal lower lobe length; dorsal fin length; anal fin length; gape. The samples were measured weight to the nearest 0.01g and total, fork and standard length to the nearest 0.01 mm. The total length (TL) ranged from 4.10 cm to 9.30 cm and body weight ranged from 0.600 to 7.137 g.Keywords: Pseudorasbora parva; topmouth gudgeon; morphometric properties; Hirfanlı Reservoir

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A new species of Yunnanilus (Cypriniformes: Nemacheilidae) from Sichuan, southwest China

Zootaxa ◽

10.11646/zootaxa.4532.1.9 ◽

2018 ◽

Vol 4532 (1) ◽

pp. 137

Author(s):

LI-NA DU ◽

MIAN HOU ◽

XIAO-YONG CHEN ◽

JUN-XING YANG

Keyword(s):

New Species ◽

Lateral Line ◽

Southwest China ◽

Pectoral Fin ◽

Caudal Peduncle ◽

Interorbital Width ◽

Eye Diameter ◽

Peduncle Length ◽

Fin Length ◽

A New Species

A new species of Yunnanilus is described from Tuojiang River, Sichuan, China. The new species, Yunnanilus jiuchiensis, can be distinguished from other species of Yunnanilus by the following combination of characters: processus dentiformis absent; body covered with scarce scales; lateral-line incomplete, as long as half the length of the pectoral-fin length, with 6–11 pores; eye diameter larger than interorbital width; and caudal-peduncle length less than its depth.

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Description of four new species of freshwater gobies from the Black River drainage in China and Vietnam (Teleostei: Gobiidae)

Zootaxa ◽

10.11646/zootaxa.4486.3.4 ◽

2018 ◽

Vol 4486 (3) ◽

pp. 284

Author(s):

MARCO ENDRUWEIT

Keyword(s):

New Species ◽

Head Width ◽

Pectoral Fin ◽

Caudal Peduncle ◽

River Drainage ◽

Dorsal Fin ◽

Lower Jaw ◽

Black Blotch ◽

Peduncle Length ◽

Fin Length

Four new species of Rhinogobius Gill 1859 are described from the Black River drainage in China and Vietnam. Rhinogobius coccinella, new species, and R. nanophyllum, new species, are described from the Mengyejiang River in Yunnan, China. Rhinogobius coccinella is diagnosed by having the cheek and operculum with about 25 large dark spots and branchiostegal membrane unmarked; caudal-peduncle depth 11–12% SL; 1–5 predorsal scales; 27–30 midlateral scales; and 28 vertebrae. Rhinogobius nanophyllum is diagnosed by having the cheek, operculum and pectoral-fin base with about 90 indistinct white marks, caudal fin plain-colored, second dorsal fin magnified with a very broad dark gray median band and a broad white proximal band in males; caudal-peduncle length 22–25% SL and pectoral-fin length 21–24% SL in males; head width at operculum 53–58% HL in males, 58–61% HL in females; 0 predorsal scales; 8–10 branched rays in the second dorsal fin; 7–8 branched anal-fin rays; and 28 vertebrae. Rhinogobius ngutinhoceps, new species, is described from the Nam Na River in Lai Chau, Vietnam. It differs from all congeners by the presence of a supraotic pore β; cheek and operculum with about 65 dark marks and branchiostegal membrane unmarked in males; snout pointed; lower jaw conspicuously protruding; predorsal length 40–41% SL; 12–15 predorsal scales; and 29 vertebrae. Rhinogobius phuongae, new species, is described from the Nam Mu River in Lai Chau, Vietnam, and is diagnosed by having the cheek with about 25 indistinct dark spots and branchiostegal membrane with pale spots in males; operculum unmarked; flank plain-colored in males; a conspicuous black blotch between spines I and III of the first dorsal fin; unpaired fins with a very broad white distal band; pectoral-fin length 20–21% SL; 8–10 predorsal scales; 8–9 branched rays in the second dorsal fin; and 28 vertebrae. A key to the species of Rhinogobius occurring within the Red River drainage is given.

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Morphological variations of striped seabream, Lithognathus mormyrus, populations along the Tunisian coast

Journal of the Marine Biological Association of the United Kingdom ◽

10.1017/s0025315410002201 ◽

2011 ◽

Vol 91 (6) ◽

pp. 1261-1271 ◽

Cited By ~ 5

Author(s):

Ibtissem Hammami ◽

Lilia Bahri-Sfar ◽

Oum Kalthoum Ben Hassine

Keyword(s):

Function Analysis ◽

Anterior Part ◽

Significant Degree ◽

The Body ◽

Statistical Analyses ◽

Ecological Niches ◽

Meristic Characters ◽

Morphometric Variation ◽

Morphological Variations ◽

Lithognathus Mormyrus

Morphological variations of Tunisian Lithognathus mormyrus populations were investigated using 41 morphometric measurements (27 truss elements and 14 traditional measurements) and eight meristic characters collected from ten marine and lagoon samples. Statistical analyses (e.g. discriminant function analysis (DFA)) performed separately to truss and traditional data revealed a significant degree of morphological dissimilarity of lagoon samples (Bizerta, Ghar El Melh and El Biban lagoons). For these three lagoon environments the overall assignment of individuals into their original sample (percentage classification success) by DFA was 94% for truss elements and 98% for traditional measurements. This morphological discrimination among lagoon samples, revealed with traditional measurements, seems to be associated only with the anterior part of the body (especially with the pre-orbit and snout length). However, for truss analyses, it was explained by both anterior and posterior parts (peduncle region). Statistical analyses for only marine samples showed partial overlapping with significant morphometric variation of the Chebba and Gabès samples mainly related to the anterior part of the body, for the first sample, but also to the posterior region, for the second one. These morphometric variations are often due to environmental conditions and mainly to the exploitation of different ecological niches that are particularly limited by the availability, type and size of prey. Thus, truss and traditional approaches are complementary and provide more accurate explanations of such a morphological discrimination. Meristic character analyses showed homogeneity of striped seabream samples, except for the Ghar El Melh lagoon sample which quietly differed from the others. This distinction was mainly explained by the number of soft anal rays.

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Traccatichthys tuberculum, a new species of nemacheiline loach from Guangdong Province, South China (Pisces: Balitoridae)

Zootaxa ◽

10.11646/zootaxa.3586.1.28 ◽

2012 ◽

Vol 3586 (1) ◽

pp. 304 ◽

Cited By ~ 1

Author(s):

CHUN-XIAN DU ◽

E ZHANG ◽

BOSCO PUI LOK CHAN

Keyword(s):

New Species ◽

South China ◽

Guangdong Province ◽

Color Pattern ◽

Caudal Peduncle ◽

Peduncle Length ◽

Coastal River ◽

Fin Length ◽

A New Species ◽

Preanal Length

Traccatichthys tuberculum, new species, is herein described from the Jian-Jiang, a coastal river in Guangdong Province,South China. Photo by Bosco P.L. Chan. This new species differs from all other Chinese congeners (i.e., T. pulcher and T.zispi) in interorbital width, caudal-peduncle length, and pectoral-fin length. It, together with T. zispi, lacks the colorpatterns of the dorsal and anal fins in T. pulcher, and differs from T. zispi in preanal length. Traccatichthys tuberculum,together with all other Chinese congeners, is distinct from the Vietnamese species, T. taeniatus, in the shape of the black bar on the caudal-fin base, and the color pattern of the anal fin.

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Amblyceps cerinum, a new catfish (Teleostei: Amblycipitidae) from northeastern India

Zootaxa ◽

10.11646/zootaxa.2672.1.3 ◽

2010 ◽

Vol 2672 (1) ◽

pp. 50 ◽

Cited By ~ 4

Author(s):

HEOK HEE NG ◽

JEREMY J. WRIGHT

Keyword(s):

South Asian ◽

West Bengal ◽

New South ◽

Taxonomic Status ◽

Caudal Peduncle ◽

Caudal Fin ◽

Dorsal Fin ◽

Adipose Fin ◽

Peduncle Length ◽

Fin Length

Amblyceps cerinum, a new South Asian amblycipitid catfish species, is described from the Brahmaputra River drainage in northern West Bengal, India. The new species can be distinguished from congeners in having a combination of upper jaw longer than lower, incomplete lateral line terminating beneath posterior insertion of dorsal fin, length of adipose-fin base 32.4–38.3% SL, caudal peduncle length 21.9–24.5% SL, caudal peduncle depth 9.2–11.2% SL, 41–44 postWeberian vertebrae, posterior end of adipose fin separated from dorsal procurrent caudal-fin rays by distinct notch, and truncate caudal fin. The taxonomic status of A. tenuispinis is also discussed and a neotype designated for this species.

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

Croatian Journal of Fisheries ◽

10.1515/cjf-2017-0016 ◽

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.

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Morphometric and meristic analyses of Randall’s threadfin bream Nemipterus randalli Russell, 1986 along the Indian coast

Indian Journal of Fisheries ◽

10.21077/ijf.2020.67.4.100806-17 ◽

2020 ◽

Vol 67 (4) ◽

Author(s):

Murugesan Srihari ◽

Suraj Kumar Pradhan ◽

Annam Pavan-Kumar ◽

Shashi Bhushan ◽

Binaya Bushan Nayak ◽

...

Keyword(s):

Function Analysis ◽

Management Strategies ◽

Demersal Fish ◽

Morphometric Characteristics ◽

Indian Coast ◽

Caudal Peduncle ◽

Indian Waters ◽

Eye Diameter ◽

Commercially Important ◽

Fin Length

Nemipterus randalli Russell, 1986 is one of the commercially important demersal fish in Indian waters. The present study was designed to understand the morphometric and meristic variations between the stocks of N. randalli along the Indian coast. A total of 450 samples were collected from 5 maritime states during September 2018 to November 2018. A total of 19 morphometric and 9 meristic traits were extracted and subjected to statistical analyses. Factor analysis showed that morphometric characteristics like eye diameter, head length, pre-pectoral length, post-orbital length, anal fin length and caudal peduncle depth were significant in separating the stocks. Discriminant function analysis showed a high re-classification success rate of 80.43%. Kruskal-Wallis test of meristic traits revealed lack of difference between the stocks. Results indicated the presence of different phenotypic stocks along the Indian coast and therefore the need for separate management strategies for sustaining the catch of N. randalli in the future.

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Short Communication: Presence of the vulnerable freshwater goby Sicyopus auxilimentus (Gobiidae, Sicydiinae) on Sangihe Island, Indonesia

Biodiversitas Journal of Biological Diversity ◽

10.13057/biodiv/d220208 ◽

2021 ◽

Vol 22 (2) ◽

Author(s):

VERYL HASAN ◽

FITRI SIL VALEN ◽

R. ADHARYAN ISLAMY ◽

Maheno Widodo ◽

ADITYA MIRZAPAHLEVI SAPTADJAJA ◽

...

Keyword(s):

Genetic Distance ◽

Short Communication ◽

Migration Route ◽

Pectoral Fin ◽

Meristic Characters ◽

Caudal Peduncle ◽

Caudal Fin ◽

Dorsal Fin ◽

Fin Rays ◽

Freshwater Goby

Abstract. Hasan V, Valen FS, Islamy RA, Widodo MS, Saptadjaja AM, Islam I. 2021. Short Communication: Presence of the vulnerable freshwater goby Sicyopus auxilimentus (Gobiidae, Sicydiinae) on Sangihe Island, Indonesia. Biodiversitas 22: 571-579. A single specimen of freshwater goby Sicyopus auxilimentus was photographed and collected using fish traps between 8 and 15 September 2019 in the Laine waterfall, Sangihe island district, North Sulawesi Province, Indonesia. S. auxilimentus is amphidromous that live in both freshwater and marine environments. This species is currently listed as Vulnerable (VU) within the IUCN Red List Status. The specimen was identified as male S. auxilimentus based on the coloration of the preserved specimen: background yellowish; scale edges brown; posterior flanks and caudal peduncle orange; first dorsal fin black, second dorsal fin dusky black; pectoral fin slightly brown; ventral fin slightly dusky; anal fin blackish; caudal fin dusky brown. Specific morphological features were as follows: the base of the first dorsal fin was not connected to the second dorsal fin base; distance between the base of first and second dorsal fin was generally less than half of eye diameter; ventral fin rays were fused to belly only between fifth rays; posterior margin of caudal fins rays was rounded; scales were all ctenoid; scales appeared on the caudal peduncle, and between anal and second dorsal fins; anterior to which, scales became widely spaced and did not imbricate. Meristic characters were as follows: first dorsal fin rays VI; second dorsal fin rays I+9; ventral fin rays I+5; pectoral-fin rays 14; anal-fin rays I+9; caudal-fin rays 13; scales in lateral series 13; scales in zigzag series 7; scales in transverse series backward 7; scales in transerves series forward 4. This finding is considered the first record in Sulawesi and the fifth from Indonesian waters after findings in Halmahera, Java, Bali and Lombok. This record enhances the understanding of the distribution of S. auxilimentus in Indonesian waters. Monitoring is needed to assess the possibility of Sangihe Island being a growth ground, spawning ground, and/or on the migration route of S. auxilimentus. In the Laine waterfall, Sangihe island, freshwater conditions were as follows: salinity 3.5 psu, temperature 23-25°C, and dissolved oxygen 7.7-9.2 mg/l, which were ideal habitat for S. auxilimentus. S. auxilimentus from Sangihe Island, had 0.000 genetic distance than from S. auxilimentus from Bali, while the next closest genetic distance was S. zosterophorus at genetic distance of 0.090. In addition to onsite conservation, domestication programs are needed to increase commercial availability without depending on natural catches.

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A new species of Metahomaloptera (Teleostei: Balitoridae) from China

Zootaxa ◽

10.11646/zootaxa.1526.1.4 ◽

2007 ◽

Vol 1526 (1) ◽

pp. 63-68

Author(s):

JIAN YANG ◽

XIAOYONG CHEN ◽

JUNXING YANG

Keyword(s):

New Species ◽

Head Width ◽

Pectoral Fin ◽

Caudal Peduncle ◽

Jinsha River ◽

Dorsal Fin ◽

Mouth Width ◽

Eye Diameter ◽

Peduncle Length ◽

A New Species

A new species of Metahomaloptera, M. longicauda, is described from the lower Jinsha River, China. The new species is distinguished from other species of Metahomaloptera by the following combination of characters: pectoral fin with 11– 15 branched rays, tip of pectoral fin extending beyond origin of dorsal fin, pelvic fin with 10–12 branched rays, pelvicfin tip reaching or extending beyond anus, dorsal fin inserting before middle of body, tip of dorsal fin far from vertical line of caudal-fin base, head width 19.4–22.6% SL, pre-pectoral length 8.4–9.9% SL, pre-anal length 69.0–74.3% SL, caudal peduncle length 17.1–20.7% SL, eye diameter 14.6–16.6% HL, caudal peduncle depth 33.7–43.1% caudal peduncle length, mouth width 63.2–75.5% body width at pectoral-fin origin.

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