scholarly journals North Atlantic Blue and Fin Whales Suspend Their Spring Migration to Forage in Middle Latitudes: Building up Energy Reserves for the Journey?

PLoS ONE ◽  
2013 ◽  
Vol 8 (10) ◽  
pp. e76507 ◽  
Author(s):  
Mónica A. Silva ◽  
Rui Prieto ◽  
Ian Jonsen ◽  
Mark F. Baumgartner ◽  
Ricardo S. Santos
Keyword(s):  
North Atlantic ◽  
Spring Migration ◽  
Energy Reserves ◽  
Middle Latitudes ◽  
Fin Whales

scholarly journals Contrasting Phylogeographic Patterns Among Northern and Southern Hemisphere Fin Whale Populations With New Data From the Southern Pacific

2021 ◽  
Vol 8 ◽  
Author(s):  
MJosé Pérez-Alvarez ◽  
Sebastián Kraft ◽  
Nicolás I. Segovia ◽  
Carlos Olavarría ◽  
Sergio Nigenda-Morales ◽  
...  
Keyword(s):  
Southern Hemisphere ◽  
Phylogenetic Analyses ◽  
Morphological Data ◽  
Phylogeographic Structure ◽  
Fin Whale ◽  
Middle Latitudes ◽  
The North ◽  
Southeastern Pacific ◽  
Fin Whales ◽  
Dispersal Events

Four fin whale sub-species are currently considered valid: Balaenoptera physalus physalus in the North Atlantic, B. p. velifera in the North Pacific, B. p. quoyi and B. p. patachonica in the Southern Hemisphere. The last, not genetically validated, was described as a pygmy-type sub-species, found in low to mid latitudes of the Southern Hemisphere. Genetic analyses across hemispheres show strong phylogeographic structure, yet low geographic coverage in middle latitudes of the Southern Hemisphere impeded an assessment within the area, as well as evaluating the validity of B. p. patachonica. New mtDNA sequences from the Southeastern Pacific allowed an improved coverage of the species’ distribution. Our phylogenetic analyses showed three main lineages and contrasting phylogeographic patterns between Northern and Southern Hemispheres. Absence of recurrent female mediated gene flow between hemispheres was found; however, rare dispersal events revealing old migrations were noted. The absence of genetic structure suggests the existence of one single taxa within the Southern Hemisphere. Thus, until further evidence supporting this subspecies can be produced, such as genetic, ecological, behavioral, or morphological data, we propose that all fin whales from the Southern Hemisphere, including those from middle latitudes of the Southeastern Pacific belong to B. p. quoyi subspecies. This information is important for the current assessment of fin whales, contributing to the evaluation of the taxonomic classification and the conservation of the species.

Revision of fin whale Balaenoptera physalus (Linnaeus, 1758) subspecies using genetics

2019 ◽  
Vol 100 (5) ◽  
pp. 1653-1670 ◽  
Author(s):  
Frederick I Archer ◽  
Robert L Brownell ◽  
Brittany L Hancock-Hanser ◽  
Phillip A Morin ◽  
Kelly M Robertson ◽  
...  
Keyword(s):  
North Atlantic ◽  
North Pacific ◽  
Recent Analysis ◽  
Snp Analysis ◽  
Balaenoptera Physalus ◽  
Data Set ◽  
Fin Whale ◽  
The North ◽  
Fin Whales ◽  
The North Pacific

Abstract Three subspecies of fin whales (Balaenoptera physalus) are currently recognized, including the northern fin whale (B. p. physalus), the southern fin whale (B. p. quoyi), and the pygmy fin whale (B. p. patachonica). The Northern Hemisphere subspecies encompasses fin whales in both the North Atlantic and North Pacific oceans. A recent analysis of 154 mitogenome sequences of fin whales from these two ocean basins and the Southern Hemisphere suggested that the North Pacific and North Atlantic populations should be treated as different subspecies. Using these mitogenome sequences, in this study, we conduct analyses on a larger mtDNA control region data set, and on 23 single-nucleotide polymorphisms (SNPs) from 144 of the 154 samples in the mitogenome data set. Our results reveal that North Pacific and North Atlantic fin whales can be correctly assigned to their ocean basin with 99% accuracy. Results of the SNP analysis indicate a correct classification rate of 95%, very low rates of gene flow among ocean basins, and that distinct mitogenome matrilines in the North Pacific are interbreeding. These results indicate that North Pacific fin whales should be recognized as a separate subspecies, with the name B. p. velifera Cope in Scammon 1869 as the oldest available name.

scholarly journals Wait your turn, North Atlantic fin whales share a common feeding ground sequentially

2020 ◽  
Vol 155 ◽  
pp. 104884 ◽  
Author(s):  
Pauline Gauffier ◽  
Asunción Borrell ◽  
Mónica A. Silva ◽  
Gísli A. Víkingsson ◽  
Alfredo López ◽  
...  
Keyword(s):  
North Atlantic ◽  
Feeding Ground ◽  
Fin Whales

Total and organic mercury in North Atlantic fin whales

1993 ◽  
Vol 26 (3) ◽  
pp. 135-139 ◽  
Author(s):  
Carolina Sanpera ◽  
Renzo Capelli ◽  
Vincenzo Minganti ◽  
Lluīs Jover
Keyword(s):  
North Atlantic ◽  
Organic Mercury ◽  
Fin Whales

scholarly journals New species of the dinoflagellate cyst genus <i>Svalbardella</i> Manum, 1960, emend. from the Paleogene and Neogene of the northern high to middle latitudes

2020 ◽  
Vol 39 (2) ◽  
pp. 139-154
Author(s):  
Kasia K. Śliwińska ◽  
Martin J. Head
Keyword(s):  
North Sea ◽  
North Atlantic ◽  
Wide Distribution ◽  
Labrador Sea ◽  
Eastern Canada ◽  
Dinoflagellate Cyst ◽  
Middle Latitudes ◽  
The North ◽  
Lower Oligocene ◽  
The North Sea

Abstract. Species of the fusiform peridiniacean dinoflagellate cyst genera Svalbardella Manum, 1960, emend. (Eocene–Oligocene) and Palaeocystodinium Alberti, 1961 (Late Cretaceous–Miocene), have been examined from the high to middle latitudes of the Northern Hemisphere: Spitsbergen, Norwegian-Greenland Sea, Labrador Sea, western North Atlantic, and the North Sea basin. The genus Svalbardella is emended to comprise species with smooth or finely ornamented surfaces and for which one or both horns are bluntly rounded. Svalbardella clausii sp. nov. has a narrow range restricted to the lowermost Chattian (close to the NP24–NP25 boundary and within Chron C9n), and it therefore appears a useful stratigraphical marker. This species has a wide distribution across the North Atlantic, having been reported from the North Sea basin, western North Atlantic, and the Labrador Sea. Svalbardella clausii sp. nov. overlaps stratigraphically with the reoccurrence interval of Svalbardella cooksoniae Manum, 1960, and spans the Oi-2b cooling maximum. Its presence may therefore be related to the establishment of cooler surface waters at this time. Svalbardella kareniae sp. nov. has a discordant occurrence: Lower Oligocene and Lower Miocene of the Norwegian Sea at Deep Sea Drilling Project Site 338 and Ocean Drilling Program Site 643, respectively, and mid-Oligocene of the North Sea. Its distribution suggests that Svalbardella kareniae sp. nov. favours more open marine conditions. Palaeocystodinium obesum Fensome et al., 2009, described from offshore eastern Canada where it has a highest occurrence in the Lower Oligocene, is emended to include specimens with a finely ornamented periphragm and traces of tabulation in addition to the archeopyle.

The Significance of Anomalies of Atmospheric Circulation Over the North Atlantic in November with Regard to the Temperatures of the Following Winters in New England *

1951 ◽  
Vol 32 (9) ◽  
pp. 319-325 ◽  
Author(s):  
Franz Baur
Keyword(s):  
New England ◽  
Atmospheric Circulation ◽  
Northern Hemisphere ◽  
North Atlantic ◽  
Middle Latitudes ◽  
The North ◽  
The North Atlantic

Seven types are established for forms of the atmospheric circulation in certain portions of “circulation regions” of the middle latitudes of the northern hemisphere. Tendencies of persistence and recurrence are different for each type and are subject to an annual course. Certain rules may be derived from changes in these types.

Cross-seasonal dynamics in body mass of male Harlequin Ducks: a strategy for meeting costs of reproduction

2010 ◽  
Vol 88 (2) ◽  
pp. 224-230 ◽  
Author(s):  
Daniel Esler ◽  
Jeanine C. Bond
Keyword(s):  
Body Mass ◽  
Spring Migration ◽  
Feeding Time ◽  
Energy Reserves ◽  
Costs Of Reproduction ◽  
Wintering Grounds ◽  
Energy Stores ◽  
Harlequin Ducks ◽  
Breeding Grounds ◽  
Wintering Areas

Considerations of acquisition of energy for reproduction by waterfowl have disproportionately focused on females, although males also require energy for reproduction. We quantified variation in body mass of male Harlequin Ducks ( Histrionicus histrionicus (L., 1758)) on coastal wintering areas prior to spring migration, as well as on breeding grounds, to determine when and where nutrients were acquired to meet costs of reproduction. Male mass on wintering grounds increased, on average, by 45 g (7%) in the weeks prior to migration. On breeding streams, we inferred that body mass of paired males decreased with the length of time on breeding grounds. Also, on average, male mass was considerably lower on breeding streams than when they departed coastal wintering sites. We conclude that males store nutrients on marine wintering grounds for subsequent use during the breeding season. Male Harlequin Ducks are highly vigilant while on breeding streams and the associated reduction in feeding time presumably requires energy stores. We suggest that males have evolved a strategy that is at least partially “capital” for meeting costs of reproduction, in which they acquire an optimal amount of energy reserves prior to spring migration and subsequently invest them in behaviours that can enhance reproductive success.

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