Faculty Opinions recommendation of Wnt/β-catenin signaling defines organizing centers that orchestrate growth and differentiation of the regenerating zebrafish caudal fin.

In this paper, we investigate the hydrodynamics of swimmers with three caudal fins: a round one corresponding to snakehead fish ( Channidae), an indented one corresponding to saithe ( Pollachius virens), and a lunate one corresponding to tuna ( Thunnus thynnus). A direct numerical simulation (DNS) approach with a self-propelled fish model was adopted. The simulation results show that the caudal fin transitions from a pushing/suction combined propulsive mechanism to a suction-dominated propulsive mechanism with increasing aspect ratio ( AR). Interestingly, different from a previous finding that suction-based propulsion leads to high efficiency in animal swimming, this study shows that the utilization of suction-based propulsion by a high- AR caudal fin reduces swimming efficiency. Therefore, the suction-based propulsive mechanism does not necessarily lead to high efficiency, while other factors might play a role. Further analysis shows that the large lateral momentum transferred to the flow due to the high depth of the high- AR caudal fin leads to the lowest efficiency despite the most significant suction.

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Redescription of Astyanax goyacensis Eigenmann, 1908 (Ostariophysi: Characiformes: Characidae)

Neotropical Ichthyology ◽

10.1590/s1679-62252009000300003 ◽

2009 ◽

Vol 7 (3) ◽

pp. 371-376 ◽

Cited By ~ 15

Author(s):

Valdener Garutti ◽

Francisco Langeani

Keyword(s):

Lateral Line ◽

Species Complex ◽

Color Pattern ◽

Caudal Peduncle ◽

Caudal Fin ◽

Black Stripe ◽

Conspicuous Feature ◽

Fin Rays ◽

Shape Pattern ◽

Eye Diameter

Astyanax goyacensis Eigenmann, 1908 is redescribed based on the holotype and 25 topotypes. The species belongs to the A. bimaculatus species complex, sharing with those species a black, horizontally ovate, humeral spot (the most conspicuous feature of this complex), two diffuse vertical brown bars in the humeral area (the first through humeral spot and the second 2-3 scales behind), and black medium caudal-fin rays. Furthermore, A. goyacensis possesses a black stripe extending along midlateral body portion, more conspicuous in alcohol preserved specimens. These characteristics allow its inclusion in the putative "black lateral stripe" sub-group of A. bimaculatus species complex. From the species of this complex it differs by the black lateral stripe shape, pattern of chromatophores on the flank, coloration of the caudal fin, scales on the lateral line, branched rays on anal fin, eye diameter, and caudal peduncle depth. Comments about the color pattern in Astyanax bimaculatus species complex are added.

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The Primary culture of caudal fin, gill lamella, hepatopancreas and spleen of Osteochilus vittatus

IOP Conference Series Earth and Environmental Science ◽

10.1088/1755-1315/746/1/012023 ◽

2021 ◽

Vol 746 (1) ◽

pp. 012023

Author(s):

Gratiana E. Wijayanti ◽

Atang

Keyword(s):

Primary Culture ◽

Gill Lamella ◽

Caudal Fin

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Expression and regulation of ccBAX by miR‐124 in the caudal fin cell of C. auratus gibelio upon cyprinid herpesvirus 2 infection

Journal of Fish Diseases ◽

10.1111/jfd.13313 ◽

2021 ◽

Author(s):

Lu Yu ◽

Qikang Chen ◽

Xin Chu ◽

Yang Luo ◽

Zizhao Feng ◽

...

Keyword(s):

Caudal Fin

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Design of Bionic Robot Fish Propelled by Two Joint Caudal Fin

Journal of Physics Conference Series ◽

10.1088/1742-6596/1982/1/012056 ◽

2021 ◽

Vol 1982 (1) ◽

pp. 012056

Author(s):

Renxiang Wu ◽

Gang Du ◽

Zheng Liu ◽

Dongxia Zhang ◽

Yingjie Yu

Keyword(s):

Caudal Fin ◽

Bionic Robot ◽

Robot Fish

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Resurrection of the genus Homalopteroides (Teleostei: Balitoridae) with a redescription of H. modestus (Vinciguerra 1890)

Zootaxa ◽

10.11646/zootaxa.3586.1.31 ◽

2012 ◽

Vol 3586 (1) ◽

pp. 329 ◽

Cited By ~ 3

Author(s):

ZACHARY S. RANDALL ◽

LAWRENCE M. PAGE

Keyword(s):

Lateral Line ◽

Head Length ◽

Pectoral Fin ◽

Caudal Fin ◽

Dorsal Fin ◽

Interorbital Width ◽

Fin Rays ◽

Orbital Rim ◽

Pectoral Fin Rays ◽

Pelvic Fin

The genus Homalopteroides Fowler 1905 is resurrected and distinguished from the genus Homaloptera van Hasselt 1823based on a combination of characters including a unique mouth morphology, dorsal-fin origin over pelvic fin,≤60 lateral-line scales, and≤30 predorsal scales. Species included in Homalopteroides are H. wassinkii (Bleeker 1853), H. modestus(Vinciguerra 1890), H. rupicola (Prashad & Mukerji 1929), H. smithi (Hora 1932), H. stephensoni (Hora 1932), H. weberi(Hora 1932), H. tweediei (Herre 1940), H. indochinensis (Silas 1953), H. nebulosus (Alfred 1969), H. yuwonoi (Kottelat1998), and possibly H. manipurensis (Arunkumar 1999). Homalopteroides modestus (Vinciguerra 1890) is a poorlyknown species that was originally described from the Meekalan and Meetan rivers of southern Myanmar. It occurs in theSalween, Mae Khlong, and Tenasserim basins, and can be distinguished from all other species of Homalopteroides by thecombination of caudal-fin pattern (black proximal and distal bars, median blotch), 15 pectoral-fin rays, pectoral-fin lengthgreater than head length, 5½–6½ scales above and 5–6 scales below the lateral line (to the pelvic fin), 39–44 total lateral-line pores, no axillary pelvic-fin lobe, pelvic fin not reaching anus, orbital length less than interorbital width in adult, and maxillary barbel reaching to or slightly past the anterior orbital rim.

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Assessment of caudal fin clip as a non-lethal technique for predicting muscle tissue mercury concentrations in largemouth bass

Environmental Chemistry ◽

10.1071/en08017 ◽

2008 ◽

Vol 5 (3) ◽

pp. 200 ◽

Cited By ~ 6

Author(s):

S. A. Ryba ◽

J. L. Lake ◽

J. R. Serbst ◽

A. D. Libby ◽

S. Ayvazian

Keyword(s):

Rhode Island ◽

Muscle Tissue ◽

Largemouth Bass ◽

Total Mercury ◽

Micropterus Salmoides ◽

Mercury Contamination ◽

Caudal Fin ◽

Minimal Impact ◽

Fish Consumption Advisories ◽

Relationship Of

Environmental context. In the development of fish consumption advisories, fisheries biologists routinely sacrifice fish and analyse muscle fillets in order to determine the extent of mercury contamination. Such lethal techniques may not be suitable for endangered species or limited fish populations from smaller-sized water bodies. We compared the measured total mercury concentrations in tail fin clips to that of muscle fillets and illustrated that tail fin clips may be used as an accurate tool for predicting mercury in muscle tissue. This is the first study on the use of tail fin clips to predict mercury levels in the muscle tissue of largemouth bass with minimal impact on the fish. Abstract. The statistical relationship between total mercury (Hg) concentration in clips from the caudal fin and muscle tissue of largemouth bass (Micropterus salmoides) from 26 freshwater sites in Rhode Island, USA was developed and evaluated to determine the utility of fin clip analysis as a non-lethal and convenient method for predicting mercury concentrations in tissues. The relationship of total Hg concentrations in fin clips and muscle tissue showed an r2 of 0.85 and may be compared with an r2 of 0.89 for Hg concentrations between scales and muscle tissue that was determined in a previous study on largemouth bass. The Hg concentration in fin clip samples (mean = 0.261 μg g–1 (dry)) was more than a factor of twenty greater than in the scale samples (mean = 0.012 μg g–1 (dry)). Therefore, fin clips may be a more responsive non-lethal predictor of muscle-Hg concentrations than scale in fish species which may have reduced Hg concentrations.

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