Pigment spots on the skin as a phene of the North Atlantic population of the beaked redfish, Sebastes mentella Travin, 1951 (Scorpaenidae)

2015 ◽  
Vol 41 (2) ◽  
pp. 136-139 ◽  
Author(s):  
Yu. I. Bakay
Author(s):  
Steven Ruggles ◽  
Evan Roberts ◽  
Sula Sarkar ◽  
Matthew Sobek

Oryx ◽  
1982 ◽  
Vol 16 (3) ◽  
pp. 255-262
Author(s):  
Randall Reeves

In the early 1800s the once abundant North Atlantic right whale was believed to be extinct. But by mid-century the species had been ‘rediscovered’, and hunting was resumed until 1918, when the whales were again in trouble. In 1935 all right whales became fully protected by an international convention, and in the 1950s the North Atlantic population was once again ‘rediscovered’. Today, after nearly 50 years of protection and slow recovery, the author assesses the present status of the North Atlantic population. Surveys showed disappointing results until in 1980 a survey of the lower Bay of Fundy (prompted by the threat of an oil refinery being built there) revealed surprisingly high numbers. Another survey in 1981, in which the author also took part, has shown the Grand Manan Island region to be a summer and autumn assembly site for at least several dozen of these endangered whales, including a number of cows and calves. This may be a key area for the North Atlantic right whale's survival.


2004 ◽  
Vol 61 (1) ◽  
pp. 113-126 ◽  
Author(s):  
Hóraldur Joensen ◽  
Otto Grahl-Nielsen

Abstract Chemometric analysis of fatty acid profile in the heart tissue of redfish (Sebastes mentella, Travin 1951) from 11 locations in the waters off Norway, Faroe Islands, Iceland, and from two strata at different depths in the Irminger Sea revealed the presence of four separate stocks in the North Atlantic Ocean. The investigation has, statistically, shown: (i) a clear distinction between S. mentella on the Faroe Plateau and S. mentella in the deeps south-west of the Faroe Bank and on the Wyville Thomson Ridge; (ii) a relationship between S. mentella inhabiting the Faroe Plateau and the Norwegian Sea; and (iii) two significantly distinct stocks of S. mentella dwelling on the Icelandic Plateau. The chemometric method, consisting of methanolysis, gas chromatography of the resulting fatty acid methyl esters, and multivariate statistical treatment of the analytical data, has a discriminating power high enough to differentiate at stock level and individual level.


1993 ◽  
Vol 71 (5) ◽  
pp. 1065-1066 ◽  
Author(s):  
Phillip J. Clapham ◽  
David K. Mattila ◽  
Per J. Palsbøll

Competitive groups of humpback whales, Megaptera novaeangliae, were observed in Samana Bay, Dominican Republic, West Indies. Photographs of ventral fluke patterns were used to identify individuals, and skin biopsies were taken for molecular determination of sex. Nine groups contained two or more whales previously identified from different high-latitude areas. In seven groups, males from different feeding grounds were observed to compete with each other, and in six cases the group's female was from a different area than at least one of her male escorts. These results provide further support for the hypothesis that the western North Atlantic population of this species can be considered a single panmictic unit.


1973 ◽  
Vol 30 (11) ◽  
pp. 1655-1660 ◽  
Author(s):  
Wilfred Templeman

The gymnoblastic colonial hydroid Ichthyocodium sarcotretis was found on the copepod Sphyrion lumpi on redfish from three areas of the northwest Atlantic: on copepods (three of ten) on deepwater redfish (Sebastes mentella) from about 200–500 m over great depths at the mouth of the Labrador Sea and, in bottom otter trawling, on copepods on S. mentella or possibly S. fasciatus from the Labrador Shelf (6 of 686) and the northeast Newfoundland Shelf (1 of 364). None were found on 492 S. lumpi from redfish taken on the continental shelf south and west of the northeast Newfoundland Shelf.The characteristics of the hydroid colonies and of their feeding polyps and reproductive hydranths and medusae are compared with published information on this hydroid found on the same hosts in the Irminger Sea and on the copepod, Sarcotretes scopeli, on the lantern fish, Benthosema glaciale, in the North Atlantic. The incidence of the hydroid on S. lumpi on redfish may possibly help in distinguishing Sebastes species in the northwest Atlantic.


1985 ◽  
Vol 63 (5) ◽  
pp. 1181-1188 ◽  
Author(s):  
Randy W. Penney

Preextrusion larvae of the ovoviviparous scorpaenid fishes, Sebastes mentella and Sebastes fasciatus, identified by the gas-bladder musculature characteristics of the parent, are described. Morphometrics, meristics, and pigmentation characteristics were recorded for late-stage preextrusion larvae taken from adult females on St. Pierre Bank, an area immediately south of and adjacent to the island of Newfoundland, Canada. The morphology of preextrusion larvae of S. mentella, in comparison with S. fasciatus, is described in detail for the first time. Univariate statistics were calculated and the utility of each of several morphometric, meristic, and pigmentation variables as a potential species identification criterion was evaluated. Discriminant analysis correctly classified up to 95% of larvae examined. The potential of the discriminant function in species identification for planktonic larvae is discussed.


2013 ◽  
Vol 26 (4) ◽  
pp. 293-306 ◽  
Author(s):  
Benjamin Planque ◽  
Kristján Kristinsson ◽  
Alexey Astakhov ◽  
Matthias Bernreuther ◽  
Eckhard Bethke ◽  
...  

The Condor ◽  
2003 ◽  
Vol 105 (4) ◽  
pp. 771-782
Author(s):  
Kim T. Scribner ◽  
Richard A. Malecki ◽  
Bruce D. J. Batt ◽  
Rainy L. Inman ◽  
Scot Libants ◽  
...  

AbstractWe used microsatellite markers, mitochondrial DNA (mtDNA), and satellite telemetry to infer the North American geographic origin and racial composition of Canada Geese (Branta canadensis) from newly colonized habitats in Greenland. Using likelihood-based assignment tests we determined that multilocus genotypes of Greenland Canada Geese were consistent with the hypothesis of origin from birds of the Atlantic Population breeding around southern Ungava Bay, Quebec, Canada. The Atlantic Population, based on previous studies of seasonal movements and demography, appeared to be reproductively isolated from the North Atlantic Population. We found that these two populations were genetically differentiated based on microsatellite allele and mtDNA haplotype frequencies. Findings of high levels of genetic discordance among North American breeding populations are consistent with migratory movements, despite high levels of distributional overlap of birds from the North Atlantic and Atlantic Populations during migration and on wintering areas. Findings based on genetic markers were concordant with satellite telemetry conducted during spring migration, which showed that birds destined for Greenland migrate through the southern Ungava Bay breeding colony. Genetic differences among these populations are useful for addressing other issues of ecological or management concern.Identificación de la Población Fuente de los Gansos Branta canadensis de Groenlandia: Evaluación Genética de una Colonización RecienteResumen. Utilizamos marcadores microsatélites, ADN mitocondrial (ADNmt), y telemetría de satélite para inferir el origen geográfico en Norte América y la composición racial de los gansos Branta canadensis en hábitats recientemente colonizados en Groenlandia. Mediante pruebas de asignación basadas en verosimilitud, determinamos que los genotipos multilocus de los gansos de Groenlandia eran consistentes con la hipótesis de origen de aves de la población del Atlántico que se reproduce alrededor del sur de Ungava Bay, Quebec, Canadá. Con base en estudios previos de movimientos estacionales y demografía, la población del Atlántico pareció estar aislada reproductivamente de la población del Atlántico Norte. Encontramos que estas dos poblaciones son genéticamente diferentes en términos de frecuencias alélicas de microsatélites y haplotipos de ADNmt. El hallazgo de altos niveles de discordancia genética entre poblaciones reproductivas norteamericanas es consistente con los movimientos migratorios, a pesar de los altos niveles de superposición de las distribuciones de aves de las poblaciones del Atlántico y el Atlántico Norte durante la migración y en las áreas de invernada. Los resultados basados en los marcadores genéticos concordaron con la telemetría satelital llevada a cabo durante la migración de primavera, la cual mostró que las aves con destino a Groenlandia migran a través del sur de la colonia reproductiva de Ungava Bay. Las diferencias genéticas entre estas poblaciones son útiles para abordar otros asuntos de interés ecológico o de manejo.


Author(s):  
Evan Roberts ◽  
Matthew Woollard ◽  
Chad Ronnander ◽  
Lisa Y. Dillon ◽  
Gunnar Thorvaldsen

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