A comparison between two populations of the Johnny darter, Etheostoma nigrum nigrum (Percidae), from Ontario, with notes on other populations

1978 ◽  
Vol 56 (5) ◽  
pp. 1043-1051
Author(s):  
Edward Kott ◽  
Gregory Humphreys
Keyword(s):  
North Carolina ◽  
Lateral Line ◽  
Lake Erie ◽  
Lake Superior ◽  
Lateral Line Scale ◽  
Taxonomic Significance ◽  
River Population ◽  
Line Scale ◽  
Johnny Darter ◽  
Two Populations

Johnny darters, Etheostoma nigrum nigrum, collected from Lake Superior were compared with individuals of the same subspecies collected in the Nith River (Lake Erie drainage). Nith River specimens, on an average, had 4.5 fewer lateral line scales, and more scales on the nape. The Lake Superior individuals had a snout which exhibited a subconical profile, whereas the individuals from the Nith River possessed a blunt profile.Examination of other populations of this subspecies indicates that lateral line scale count exhibits a northwest to southeast cline from Saskatchewan and Manitoba to North Carolina. All the supplementary populations were predominantly of one morph with regards to snout profile, the northwesterly populations being similar to the Lake Superior population, and the southeasterly ones being similar to the Nith River population. The taxonomic significance of snout profile is discussed.

scholarly journals On a new species of the genus Moenkhausia Eigenmann (Ostariophysi: Characidae)

Zootaxa ◽  
2007 ◽  
Vol 1525 (1) ◽  
pp. 61-68 ◽  
Author(s):  
PAULO H.F. LUCINDA ◽  
LUIZ R. MALABARBA ◽  
RICARDO C. BENINE
Keyword(s):  
New Species ◽  
Distribution Pattern ◽  
Lateral Line ◽  
The Body ◽  
Dark Spot ◽  
Lateral Line Scale ◽  
Caudal Fin ◽  
Body Side ◽  
Line Scale ◽  
A New Species

A new species of the genus Moenkhausia is described from the middle portions of the Rio Tocantins and tentatively from the Rio Apure in Venezuela, Rio Orinoco drainage. It is diagnosed by the presence of a dark spot in the half proximal length of the upper caudal-fin lobe, and by the presence of a large, irregularly shaped humeral spot located above the sixth to ninth perforated lateral line scale which is more posteriorly positioned along the body side in relation to other members of the genus. The distribution pattern of the new species is discussed.

A new syntopic species of small barb from the Western Ghats of India (Teleostei: Cyprinidae)

Zootaxa ◽  
2018 ◽  
Vol 4434 (3) ◽  
pp. 529 ◽  
Author(s):  
UNMESH KATWATE ◽  
PRADEEP KUMKAR ◽  
RAJEEV RAGHAVAN ◽  
NEELESH DAHANUKAR
Keyword(s):  
New Species ◽  
Lateral Line ◽  
Western Ghats ◽  
Lateral Line Scale ◽  
Dorsal Fin ◽  
Line Scale ◽  
Mitochondrial Cytochrome B ◽  
Western Ghats Of India ◽  
The Western Ghats ◽  
Pelvic Fin

A new species of the cyprinid genus Pethia is described from the Hiranyakeshi, a tributary of the Krishna River system in the Western Ghats mountain ranges of peninsular India. The new species, Pethia sahit, is syntopic—and shoals together—with Pethia longicauda, a species described recently from the same river. Pethia sahit is distinguished from P. longicauda and its congeners by a combination of characters like, incomplete lateral line with 3–6 pored scales; 19–22 scales in lateral series; 4½ scales between dorsal-fin origin and lateral-line row and 2½ scales between lateral line row and pelvic-fin origin; intercalated scale row originates above and after the 6th scale of the lateral-line scale row; dorsal fin originating behind the pelvic-fin origin; 4+13 abdominal and 12 caudal vertebrae; dorsal, pectoral, pelvic, anal and caudal fins without any bands or spots, deep yellow-orange in color or deep red with a pale tint of orange in mature males; a dark-black vertically elongate humeral spot, overlapping the 4th lateral-line scale, extending over the base of one scale above and below the 4th scale; caudal peduncle spot dark, covering 14th–16th scales in lateral-line scale row. Genetic analysis based on the mitochondrial cytochrome b gene indicates that P. sahit and P. longicauda are not sister taxa. Further, P. sahit has no genetically proximate congener in the Western Ghats region, and differs from known congeners from south and southeast Asia, for which genetic data are available, with genetic distance ranging from 11.8–16.4%. 

scholarly journals Comparison of Lateral Line Scale Counts on Arctic Grayling From Yellowstone National Park and Montana

1978 ◽  
Vol 2 ◽  
pp. 147-149
Author(s):  
William Gould
Keyword(s):  
Lateral Line ◽  
Yellowstone National Park ◽  
National Park ◽  
Lateral Line Scale ◽  
Arctic Grayling ◽  
Line Scale ◽  
Thymallus Arcticus

Arctic grayling (Thymallus arcticus ) are presently absent from areas they formerly inhabited in Yellowstone National Park. A project has been begun to re-establish this species in areas of the Park within its former range. The purpose of this portion of the study was to examine the meristic characteristics of populations of Arctic grayling from Y.N.P. and Montana. The results of this work and those from the electrophoretic examination will provide information for the collection of stocks to be used for the restoration of Arctic grayling in areas of Y.N.P.

Lateral line scale types and review of their taxonomic distribution

2017 ◽  
Vol 99 (1) ◽  
pp. 65-86 ◽  
Author(s):  
Elena P. Voronina ◽  
Dianne R. Hughes
Keyword(s):  
Lateral Line ◽  
Lateral Line Scale ◽  
Taxonomic Distribution ◽  
Line Scale ◽  
Scale Types

Characidium chancoense, a new species of South American darter from the Río Cauca drainage, Colombia (Characiformes: Crenuchidae)

Zootaxa ◽  
2020 ◽  
Vol 4768 (2) ◽  
pp. 249-263 ◽  
Author(s):  
HENRY D. AGUDELO-ZAMORA ◽  
ARMANDO ORTEGA-LARA ◽  
DONALD C. B. TAPHORN
Keyword(s):  
New Species ◽  
Lateral Line ◽  
Sexually Dimorphic ◽  
South American ◽  
Lateral Line Scale ◽  
Pigmentation Pattern ◽  
Line Scale ◽  
Vertical Bars ◽  
A New Species

Characidium chancoense new species, is described from the transandean upper Río Cauca drainage in Colombia. It can be distinguished from all congeners by its pigmentation pattern that consists of 7–12 vertical bars, most of which are cuneate-shaped with the vertex ending on or just below the lateral-line scale series, except for the last 1–4, which are dorsoventrally elongate rectangular bars that extend well below the lateral line. Characidium chancoense is sympatric with C. caucanum Eigenmann, C. phoxocephalum Eigenmann, C. cf. zebra Eigenmann and C. cf. boavistae Steindachner. Unlike C. caucanum and C. cf. boavistae, C. chancoense does not appear to be sexually dimorphic. 

Geographic Variation in the Lateral Line Scale Counts of the Arctic Grayling, Thymallus arcticus

1971 ◽  
Vol 28 (5) ◽  
pp. 749-754 ◽  
Author(s):  
P. McCart ◽  
V. A. Pepper
Keyword(s):  
Geographic Variation ◽  
Lateral Line ◽  
The Arctic ◽  
North Slope ◽  
Lateral Line Scale ◽  
High Count ◽  
Arctic Grayling ◽  
The North ◽  
Line Scale ◽  
Thymallus Arcticus

An examination of Arctic grayling (Thymallus arcticus) collected on either side of the continental divide (Brooks Range) in Alaska revealed that lateral line scale counts were significantly higher on the North Slope than in the Yukon Basin to the south. An examination of geographic variation in this character within the North American range of the species suggested a division into three geographic areas: an area of uniformly low mean counts in the Bering Sea–North Slope of Alaska; an area of uniformly high counts in the remainder of Alaska and parts of the Yukon Territory and British Columbia; an area of variable mean counts in the Northwest Territories. Only two glacial refugia need be postulated to explain this pattern if it is assumed that populations in the first and last of these areas have a similar Mississippian origin and the high count populations a Beringian origin.

Leporinus amazonicus, a new anostomid species from the Amazon lowlands, Brazil (Osteichthyes: Characiformes)

Zootaxa ◽  
2008 ◽  
Vol 1815 (1) ◽  
pp. 35 ◽  
Author(s):  
GERALDO MENDES DOS SANTOS ◽  
JANSEN ZUANON
Keyword(s):  
New Species ◽  
Lateral Line ◽  
Body Height ◽  
Color Pattern ◽  
Lateral Line Scale ◽  
Fish Family ◽  
Subsistence Fisheries ◽  
Line Scale ◽  
Different Color ◽  
A New Species

Leporinus amazonicus, a new species of anostomid fish, is described from the central portion of the Amazon lowlands. It is a medium-sized fish (up to 250 mm SL) with streamlined body (maximum body height approximately 25% of SL) and high lateral line scale counts (45–47). Leporinus amazonicus is morphologically similar to the slender bodied species L. cylindriformis Borodin, 1929 and L. brunneus Myers, 1950, but differs from them by the higher lateral line scale count (41–43 in L. cylindriformis and 36–42 in L. brunneus) and by a different color pattern. Moreover, L. amazonicus is apparently restricted to the white waters of the Amazon lowlands whereas L. cylindriformis and L. brunneus are known only from clear and black waters of several of the Rio Amazonas tributaries. Despite intensive collecting efforts historically developed in Brazilian Central Amazon, just a few specimens of L. amazonicus were caught, indicating that the new species is relatively rare in that area and apparently do not join in large schools. However, this supposed rarity may be biased by the concentration of our collecting efforts around Manaus, which may represent a marginal distribution of this species. Nevertheless, the presence of a new species of a taxonomically well-known fish family in an area intensively exploited by commercial and subsistence fisheries evidences the need for fish species surveys in the Amazon, even in supposedly well sampled sites and around the most populous areas.

Revision of the genus Parequula (Pisces: Gerreidae) with a new species from southwestern Australia

Zootaxa ◽  
2012 ◽  
Vol 3425 (1) ◽  
pp. 42 ◽  
Author(s):  
YUKIO IWATSUKI ◽  
JOHN J. POGONOSKI ◽  
PETER LAST
Keyword(s):  
New Species ◽  
Lateral Line ◽  
Nominal Species ◽  
Lateral Line Scale ◽  
Type Specimens ◽  
Southwestern Australia ◽  
Dorsal Fin ◽  
Line Scale ◽  
Fin Ray ◽  
A New Species

The genus Parequula, which has long been considered monotypic, is reviewed with a new species described fromsouthwestern Australia on the basis of 21 types and 17 non-type specimens (42–81 mm in standard length); its onlycongener, P. melbournensis (Castelnau), is also redescribed. Parequula elongata n. sp. differs from P. melbournensis inhaving a more slender body, a lower soft anal-fin ray count (14–15, mode 15 vs. 16–18, mode 17), a lower pored lateral-line scale count (34–35, mode 34 vs. 37–40, mode 38), and the dorsal fin with a reddish upper margin when fresh (vs.semi-translucent to bluish with a narrow, parallel, yellowish vertical line on each fin membrane and a yellowish fin marginin P. melbournensis). Furthermore, the head profile of P. elongata n. sp. is nearly straight to slightly convex, whereas P.melbournensis is distinctly concave in outline above the eyes. Nominal species (junior synonyms) of P. melbournensis are discussed and a key to the two species is also provided.

Susceptibility of Palmer amaranth (Amaranthus palmeri) to herbicides in accessions collected from the North Carolina Coastal Plain

Weed Science ◽  
2020 ◽  
Vol 68 (6) ◽  
pp. 582-593
Author(s):  
Denis J. Mahoney ◽  
David L. Jordan ◽  
Nilda Roma-Burgos ◽  
Katherine M. Jennings ◽  
Ramon G. Leon ◽  
...  
Keyword(s):  
North Carolina ◽  
Dose Response ◽  
Coastal Plain ◽  
Weed Management ◽  
Acetolactate Synthase ◽  
Fold Increase ◽  
Palmer Amaranth ◽  
Amaranthus Palmeri ◽  
Sites Of Action ◽  
Two Populations

AbstractPalmer amaranth (Amaranthus palmeri S. Watson) populations resistant to acetolactate synthase (ALS)-inhibiting herbicides and glyphosate are fairly common throughout the state of North Carolina (NC). This has led farm managers to rely more heavily on herbicides with other sites of action (SOA) for A. palmeri control, especially protoporphyrinogen oxidase and glutamine synthetase inhibitors. In the fall of 2016, seeds from A. palmeri populations were collected from the NC Coastal Plain, the state’s most prominent agricultural region. In separate experiments, plants with 2 to 4 leaves from the 110 populations were treated with field use rates of glyphosate, glufosinate-ammonium, fomesafen, mesotrione, or thifensulfuron-methyl. Percent visible control and survival were evaluated 3 wk after treatment. Survival frequencies were highest following glyphosate (99%) or thifensulfuron-methyl (96%) treatment. Known mutations conferring resistance to ALS inhibitors were found in populations surviving thifensulfuron-methyl application (Ala-122-Ser, Pro-197-Ser, Trp-574-Leu, and/or Ser-653-Asn), in addition to a new mutation (Ala-282-Asp) that requires further investigation. Forty-two populations had survivors after mesotrione application, with one population having 17% survival. Four populations survived fomesafen treatment, while none survived glufosinate. Dose–response studies showed an increase in fomesafen needed to kill 50% of two populations (LD50); however, these rates were far below the field use rate (less than 5 g ha−1). In two populations following mesotrione dose–response studies, a 2.4- to 3.3-fold increase was noted, with LD90 values approaching the field use rate (72.8 and 89.8 g ha−1). Screening of the progeny of individuals surviving mesotrione confirmed the presence of resistance alleles, as there were a higher number of survivors at the 1X rate compared with the parent population, confirming resistance to mesotrione. These data suggest A. palmeri resistant to chemistries other than glyphosate and thifensulfuron-methyl are present in NC, which highlights the need for weed management approaches to mitigate the evolution and spread of herbicide-resistant populations.

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