scholarly journals On the Swimming Bladder and Flying Powers of Dactylopterus volitans

1891 ◽  
Vol 17 ◽  
pp. 132-138 ◽  
Author(s):  
W. L. Calderwood
Keyword(s):  
Lateral Line ◽  
Vertical Plate ◽  
Neural Plate ◽  
Pectoral Fins ◽  
Rigid Tube ◽  
Swimming Bladder ◽  
Large Muscle

Dactylopterus volitans, the so-called “flying gurnard,” is not included by Günther in the genus Triglidæ, as its name might imply, but is assigned to the small allied family of Cataphracti.Günther diagnoses it as follows :—“Dactylopterus, no lateral line, pectoral fins very large, an organ of flight, with the upper portion detached and shorter, granular teeth in the jaws, none on the palate, air bladder divided into two lateral halves, each with a large muscle.”Before proceeding to describe in detail the swimming bladder and other anatomical peculiarities, it may be well to state, that the skull is provided with a superficial bony covering which projects backwards over the region of the “shoulder” in two flattened plates, each terminating in a spine (seen in fig. 2). Also that the first four vertebræ of the column have coalesced so as to form a rigid tube, the neural spines being united as a vertical plate, which for convenience I have termed the neural plate.

scholarly journals A new species of Hyphessobrycon (Teleostei: Characidae) from the upper rio Tocantins drainage, with bony hooks on fins

2005 ◽  
Vol 3 (1) ◽  
pp. 83-88 ◽  
Author(s):  
Vinicius A. Bertaco ◽  
Luiz R. Malabarba
Keyword(s):  
New Species ◽  
Lateral Line ◽  
Pectoral Fins ◽  
Fin Rays ◽  
A New Species

A new species of characid, Hyphessobrycon hamatus, is described from the upper rio Tocantins, Goiás, Brazil. The new species is distinguished from all other Hyphessobrycon species by the presence of bony hooks on dorsal, anal, pelvic, and pectoral fins of males, the two black humeral spots, the 4 or 5 teeth in the inner series of the premaxilla, a maxilla with 2-3 teeth, the iii-v, 16-18 anal-fin rays, and a lateral line with 10-32 perforated scales and 33-35 scales in a longitudinal series.

scholarly journals Astyanaxelachylepis, a new characid fish from the rio Tocantins drainage, Brazil (Teleostei: Characidae)

2005 ◽  
Vol 3 (3) ◽  
pp. 389-394 ◽  
Author(s):  
Vinicius A. Bertaco ◽  
Paulo H. F. Lucinda
Keyword(s):  
New Species ◽  
Lateral Line ◽  
Caudal Peduncle ◽  
Pectoral Fins ◽  
Maxillary Tooth ◽  
Fin Rays

A new characid species, Astyanax elachylepis, is described from the rio Tocantins drainage. The new species is distinguished from its congeners by possessing 48-53 perforated scales along the lateral line, a large caudal-peduncle spot, the presence of bony hooks on dorsal, anal, pelvic, and pectoral fins of males, one or two vertically-elongated humeral spots, one maxillary tooth, and 22-27 branched anal-fin rays.

2. Observations on a New Species of British Gurnard, and on a Species of Sole new to Science

1845 ◽  
Vol 1 ◽  
pp. 157-158
Author(s):  
Richard Parnell
Keyword(s):  
New Species ◽  
Lateral Line ◽  
Free Margin ◽  
Pectoral Fins ◽  
Dorsal Fin ◽  
The Mediterranean ◽  
Dark Blue ◽  
A New Species

The author obtained, in the early part of last September, at Brixham, in Devonshire, seven specimens of a species of Gurnard, which has been known for thirty years past to the fishermen there under the name of Finned Captains. This he ascertained to be the Trigla lucerna of Brunner. The species is known as an inhabitant of the Mediterranean, where it was first noticed by Rondeletius, but mistaken by him for the T. cuculus of Linnæus. Since then, Brunner noticed it at Marseilles, Risso at Nice, Leach at Malta, and Cuvier at Naples; but it had not been previously observed by any naturalist on the British coasts. The largest specimen obtained by the author is 10½ inches long. The back is light red, the pectoral fins dark blue, the sides marked by a silvery band from the gill-cover to the tail; the lateral line smooth, and formed by numerous semicircular plates, beautifully radiated at their free margin ; the scales thin, large, and entire; the second ray of the first dorsal fin very long, so as to reach, when folded down, beyond the sixth ray of the second dorsal fin. (See Plate.)

scholarly journals Fluktuasi asimetri ikan nila (Oreochromis niloticus) di Pusat Pelatihan Mandiri Kelautan dan Perikanan (P2MKP) Dunia Air, Banyuwangi

2017 ◽  
Vol 2 (1) ◽  
Author(s):  
Darmawan Setia Budi ◽  
Lailatul Lutfiyah
Keyword(s):  
Lateral Line ◽  
Fluctuating Asymmetry ◽  
Oreochromis Niloticus ◽  
Nile Tilapia ◽  
Quantitative Information ◽  
Meristic Characters ◽  
Pectoral Fins ◽  
Nile Tilapia Oreochromis Niloticus ◽  
Fish Samples ◽  
The Stability

Fluctuating asymmetry of the bilateral meristic characteristic is one of the simple methods that can be used to determine the stability of an individual fish development. This study aims to provide quantitative information about the level of asymmetry of Nile tilapia (Oreochromis niloticus) in Dunia Air Independent Training Center Marine and Fisheries, Banyuwangi through bilateral meristic characteristic observation.  A total of 120 fish samples (5-7 cm) were measured in this study. Four bilateral meristic characters were calculated i.e. the number of soft pectoral fins, number of soft ventral fins, number of scales on the lateral line up and down. The results show that the highest value of the fluctuating asymmetry of magnitude (FAm) and fluctuating asymmetry of number (FAn) was obtained at the number of scales on the lateral line up those are 2.14 and 0.78, respectively. Meanwhile, the lowest FAm and FAn values obtained from the soft ventral fins which were 1.69 and 0.78, respectively. The sum of the total value of fluctuating asymmetry of each bilateral meristic characteristic was observed. The overall FAm value was 7.83 and the overall FAn value was 2.99.Keywords: fluctuating asymmetry, Nile tilapia, PMKP Dunia Air 

scholarly journals Fluctuating Asymmetry of Red Tilapia (Oreochromis niloticus) in Genteng Fish Hatchery Center, Banyuwangi

Omni-Akuatika ◽  
2017 ◽  
Vol 13 (1) ◽  
Author(s):  
Darmawan Setia Budi ◽  
Lailatul Lutfiyah ◽  
Rr. Juni Triastuti
Keyword(s):  
Lateral Line ◽  
Fluctuating Asymmetry ◽  
Oreochromis Niloticus ◽  
Quantitative Information ◽  
Fish Hatchery ◽  
Fish Development ◽  
Red Tilapia ◽  
Pectoral Fins ◽  
Individual Fish ◽  
The Stability

Fluctuating asymmetry of bilateral meristic characteristic is one of the simple methods that can be used to determine the stability of an individual fish development. This study aims to provide quantitative information about the level of asymmetry red tilapia (Oreochromis niloticus) in Genteng Fish Hatchery Center through bilateral meristic characteristic observation. The number of fish used in this study is 100 fish which have a measurement of 5-7 cm. Bilateral meristic characteristic observed is the number of soft pectoral fins, the number of soft pelvic fins, and the number of scales on the lateral line. The results show that the highest value of the fluctuating asymmetry magnitude (FAm) and fluctuating asymmetry number (FAn) are obtained at the number of scales on the lateral line those are 3.71 and 0.86. Furthermore, on soft pectoral fins, the FAm value obtained is 1.29 and the FAn value is 0.58. Meanwhile, the lowest FAm and FAn values obtained from the soft ventral fins which are 0.93 and 0.50. The overall FAm value is 5.93 and the overall FAn value is 1.94.

2. Observations on a New Species of British Gurnard, and on a Species of Sole new to Science

1845 ◽  
Vol 1 ◽  
pp. 157-157
Author(s):  
Richard Parnell
Keyword(s):  
New Species ◽  
Lateral Line ◽  
Free Margin ◽  
Pectoral Fins ◽  
Dorsal Fin ◽  
The Mediterranean ◽  
Dark Blue ◽  
A New Species

The author obtained, in the early part of last September, at Brixham, in Devonshire, seven specimens of a species of Gurnard, which has been known for thirty years past to the fishermen there under the name of Finned Captains. This he ascertained to be the Trigla lucerna of Brunner. The species is known as an inhabitant of the Mediterranean, where it was first noticed by Rondeletius, but mistaken by him for the T. cuculus of Linnæus. Since then, Brunner noticed it at Marseilles, Risso at Nice, Leach at Malta, and Cuvier at Naples ; but it had not been previously observed by any naturalist on the British coasts. The largest specimen obtained by the author is 10½ inches long. The back is light red, the pectoral fins dark blue, the sides marked by a silvery band from the gill-cover to the tail; the lateral line smooth, and formed by numerous semicircular plates, beautifully radiated at their free margin ; the scales thin, large, and entire; the second ray of the first dorsal fin very long, so as to reach, when folded down, beyond the sixth ray of the second dorsal fin. (See Plate).

A new species of Chondrostoma Agassiz, 1832 (Cypriniformes: Cyprinidae) with sexual dimorphism from the lower Rio Tejo Basin, Portugal

Zootaxa ◽  
2007 ◽  
Vol 1616 (1) ◽  
pp. 23-35 ◽  
Author(s):  
HUGO F. GANTE ◽  
CARLOS D. SANTOS ◽  
MARIA JUDITE ALVES
Keyword(s):  
New Species ◽  
Sexual Dimorphism ◽  
Lateral Line ◽  
Morphological Traits ◽  
The Other ◽  
Pectoral Fins ◽  
Lower Jaw ◽  
Fin Ray ◽  
Pharyngeal Teeth ◽  
A New Species

Chondrostoma olisiponensis sp. nov. is described from the lower Rio Tejo Basin. It is a small species (all specimens examined less than 105mm SL) distinguished from the other species of Chondrostoma s.l. by the following combination of characters. Chondrostoma olisiponensis lacks a horny blade on the lower jaw, has a pronouncedly arched mouth, and lacks an intense reddish coloration at the base of the fins. It has elongated pelvic fins that reach the anus and often pass the anal-fin insertion in males, and dorsal, pelvic and anal fins usually have 8 branched rays. The new species has 36 to 43 scales in the lateral line, 7.0 to 8.5 scales above the lateral line, 13 to 16 circumpeduncular scales, denticulated (vs. smooth) grinding teeth surfaces, 6-5/5 pharyngeal teeth and 15 to 19 gill rakers. Chondrostoma olisiponensis is further distinguished from C. lusitanicum, a phylogenetically close species that lives in the same area, by having a higher body, a relatively longer head, and a larger eye. The origins of anal and pelvic fins are displaced anteriorly, while the origin of pectoral fins is displaced posteriorly. Pelvic and pectoral fins and last anal-fin ray are longer in the new species. Unlike the other species in the genus, C. olisiponensis shows external sexual dimorphism, with males having longer pelvic fins whose extremities pass the anus and often overlap with the anal fin. This description raises concerns on the recently proposed splitting of Chondrostoma s.l. since the morphological traits deemed characteristic of some genera are unsuitable for their diagnosis. The species should be considered Critically Endangered (CR) according to IUCN criteria B1ab(ii,iii,iv)c(iv)+2ab(ii,iii,iv)c(iv).

scholarly journals Saurida golanii, a new deep water lizardfish (Pisces: Synodontidae) from the Gulf of Aqaba, northern Red Sea

Zootaxa ◽  
2011 ◽  
Vol 3098 (1) ◽  
pp. 21 ◽  
Author(s):  
BARRY C. RUSSELL
Keyword(s):  
New Species ◽  
Red Sea ◽  
Lateral Line ◽  
Deep Water ◽  
Gulf Of Aqaba ◽  
Caudal Peduncle ◽  
Pectoral Fins ◽  
Dorsal Fin ◽  
Transverse Scale ◽  
Northern Red Sea

Saurida golanii sp.nov. is described on the basis of eight specimens collected from bottom-set trammel nets in deep water (200–500 m) off Eilat, in the Gulf of Aqaba, northern Red Sea. The new species is characterised by the following combination of characters: lateral-line scales 53–56; transverse scale rows 4½/5½; long pectoral fins (extending beyond a line from origin of pelvic fins to origin of dorsal fin); caudal peduncle compressed (depth greater than width); and pelvic fins unpigmented.

scholarly journals Hyphessobrycon natagaima (Characiformes: Characidae) a new species from Colombia, with a key to the Magdalena Basin Hyphessobrycon species

Caldasia ◽  
2015 ◽  
Vol 37 (1) ◽  
pp. 221 ◽  
Author(s):  
Carlos A. García-Alzate ◽  
Donald C. Taphorn ◽  
Cesar Roman-Valencia ◽  
Francisco A. Villa-Navarro
Keyword(s):  
New Species ◽  
River Basin ◽  
Lateral Line ◽  
Caudal Peduncle ◽  
Caudal Fin ◽  
Pectoral Fins ◽  
Fin Rays ◽  
Magdalena River ◽  
A New Species ◽  
Pelvic Fin

<p>A new species, Hyphessobrycon natagaima, is described from the upper Magdalena River Basin in Colombia. It differs from all other species of Hyphessobrycon with a dark lateral stripe inhabiting the Magdalena River Basin: H. poecilioides, H. proteus and H. ocasoensis, by having eight to twelve pored lateral-line scales (vs. 14-26); four scales between the lateral line and the pelvic-fin insertions (vs. five or six); one tooth on the maxilla (vs. zero in H. poecilioides, and two to five in H. proteus; except H. ocasoensis, with one), a dark, interrupted, lateral stripe that is not in contact with the caudal peduncle spot (vs. absence of caudal spot in H. poecilioides, lateral stripe continued that is in contact with the caudal peduncle spot in H. ocasoensis). It has a rhomboid shaped caudal-peduncle spot that continues on to middle caudal-fin rays (vs. absence of caudal peduncle spot in H. poecilioides and caudal peduncle spot round and not continued on to middle caudal-fin rays in H. ocasoensis); and presence of hooks on all fins in mature males (vs. males with hooks on anal, pelvic and pectoral fins). Hyphessobrycon natagaima differs from H. ocasoensis, in addition to the above characters, by having four scale rows between the lateral line and the anal-fin origin (vs. six); three or four scale rows between the lateral line and the pelvic-fin insertions (vs. six); ten or eleven predorsal scales (vs. nine); i,9,i dorsal-fin rays (vs. ii,8,i); 18-20 branched anal-fin rays (vs. 21-22) and eleven branched pectoral-fin rays (vs. twelve). A key for the identification of Hyphessobrycon species present in the Magdalena River Basin is provided.</p>

A Study on the Fine Structure of the Lateral Line Organ of the Sea Eel

1973 ◽  
Vol 31 ◽  
pp. 648-649
Author(s):  
K. Hama
Keyword(s):  
Fine Structure ◽  
Electron Microscope ◽  
Lateral Line ◽  
Low Frequency ◽  
Sensory Cells ◽  
Apical Surface ◽  
Voltage Electron ◽  
Sensory Epithelia ◽  
Low Frequency Vibration ◽  
Transmission Electron

The lateral line organs of the sea eel consist of canal and pit organs which are different in function. The former is a low frequency vibration detector whereas the latter functions as an ion receptor as well as a mechano receptor.The fine structure of the sensory epithelia of both organs were studied by means of ordinary transmission electron microscope, high voltage electron microscope and of surface scanning electron microscope.The sensory cells of the canal organ are polarized in front-caudal direction and those of the pit organ are polarized in dorso-ventral direction. The sensory epithelia of both organs have thinner surface coats compared to the surrounding ordinary epithelial cells, which have very thick fuzzy coatings on the apical surface.

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