scholarly journals Estimates of the abundance of cetaceans in the central North Atlantic based on the NASS Icelandic and Faroese shipboard surveys conducted in 2015

2019 ◽  
Vol 11 ◽  
Author(s):  
Daniel Pike ◽  
Thorvaldur Gunnlaugsson ◽  
Bjarni Mikkelsen ◽  
Sverrir D. Halldórsson ◽  
Gísli Víkingsson
Keyword(s):  
North Atlantic ◽  
Distance Sampling ◽  
Physeter Macrocephalus ◽  
Large Area ◽  
Balaenoptera Physalus ◽  
The North ◽  
Abundance Estimates ◽  
Multiple Covariates ◽  
The North Atlantic ◽  
June July

The North Atlantic Sightings Survey (NASS), the sixth in a series of surveys conducted between 1987 and 2015, was conducted in June/July 2015 and covered a large area of the northern North Atlantic. The Icelandic and Faroese ship survey component of the NASS covered the area between the Faroe Islands and East Greenland from latitude 52° to 72° N. The survey used 3 vessels and an independent double-platform configuration with each platform staffed by a minimum of 2 observers. Here we present both uncorrected abundance estimates derived using Multiple Covariates Distance Sampling, and corrected abundance estimates derived using Mark-Recapture Distance Sampling, for the following species: fin (Balaenoptera physalus), common minke (B. acutorstrata), humpback (Megaptera novaeangliae), blue (B. musculus), sei (B. borealis), sperm (Physeter macrocephalus), long-finned pilot (Globicephala melas) and northern bottlenose (Hyperoodon ampullatus) whales as well as white-beaked (Lagenorhynchus albirostris) and white-sided (L. acutus) dolphins. We then compare these estimates to those from previous NASS and put them into context with estimates from adjoining areas of the North Atlantic.

A link between male sperm whales, Physeter macrocephalus, of the Azores and Norway

2012 ◽  
Vol 92 (8) ◽  
pp. 1751-1756 ◽  
Author(s):  
Lisa Steiner ◽  
Luca Lamoni ◽  
Marta Acosta Plata ◽  
Silje-Kristin Jensen ◽  
Erland Lettevall ◽  
...  
Keyword(s):  
Nova Scotia ◽  
North Atlantic ◽  
Ocean Basin ◽  
Physeter Macrocephalus ◽  
Sperm Whales ◽  
Photo Identification ◽  
The North ◽  
Male Sperm ◽  
Basin Scale ◽  
The North Atlantic

Little is known about the movements of male sperm whales, Physeter macrocephalus, in the North Atlantic. Recoveries of traditional harpoons and tags during commercial whaling indicated movements from Nova Scotia to Spain and from the Azores to Iceland and Spain. We compared collections of photo-identification images from different areas using the North Atlantic and Mediterranean Sperm Whale Catalogue and the Eurphlukes Phlex/Match programs. The largest collections of identified males (number of individuals, start and end date for data collection shown in parentheses) are for the Azores (297, 1987–2008), Andenes (375, 1988–1996 and 2008), Tromsø (84, 2005–2008). There were six matches between Andenes and Tromsø (~25 nm), with three of these re-sighted in multiple years and three photo-identification matches from the Azores to Norway (~2400 nm). In all cases individuals first photographed in the Azores (in 1993, 1999 and 2003) were matched to images collected later in Tromsø (in 2007 and 2008). In 1997 a photo-identification image from Andenes matched a male stranded on the west coast of Ireland. No matches were made to images in smaller collections from Iceland, Nova Scotia, Greenland, Dominica, Guadeloupe, Gulf of Mexico and the Mediterranean. These findings show the value of data collected from whale watching vessels and the importance of collaboration between groups to allow investigation on an ocean basin scale. It is hoped that with the coordinated collection of more images from around the Atlantic, further insight might be gained into the movements of these widely ranging animals.

scholarly journals Estimates of Cetacean Abundance in the North Atlantic of Relevance to NAMMCO

2020 ◽  
Vol 11 ◽  
Author(s):  
Geneviève Desportes
Keyword(s):  
North Atlantic ◽  
Cetacean Species ◽  
The North ◽  
Abundance Estimates ◽  
The North Atlantic

The best available abundance estimates for cetacean species in areas of relevance to the work of NAMMCO since 1986 are presented and the references to the original sources is provided.

Long-Range Longitudinal Movements of Sperm Whales (Physeter macrocephalus) in the North Atlantic Ocean Revealed by Photo-Identification

2022 ◽  
Vol 48 (1) ◽  
pp. 3-8
Author(s):  
Keith D. Mullin ◽  
Lisa Steiner ◽  
Charlotte Dunn ◽  
Diane Claridge ◽  
Laura González García ◽  
...  
Keyword(s):  
Atlantic Ocean ◽  
Long Range ◽  
North Atlantic ◽  
North Atlantic Ocean ◽  
Physeter Macrocephalus ◽  
Sperm Whales ◽  
Photo Identification ◽  
The North ◽  
The North Atlantic

Whale milk. I. Fin whale (Balaenoptera physalus) and beluga whale (Delphinapterus leucas) milk: gross composition and fatty acid constitution

1969 ◽  
Vol 47 (1) ◽  
pp. 95-97 ◽  
Author(s):  
B. H. Lauer ◽  
B. E. Baker
Keyword(s):  
Fatty Acid ◽  
North Atlantic ◽  
Beluga Whale ◽  
Delphinapterus Leucas ◽  
Hudson Bay ◽  
Balaenoptera Physalus ◽  
Fin Whale ◽  
The North ◽  
The North Atlantic ◽  
Beluga Whale Delphinapterus Leucas

Milk was obtained from a fin whale which was killed in the North Atlantic and from a beluga whale which was killed in Hudson Bay. The gross composition and fatty acid constitution of the milks were determined.

The diet of sperm whales ( Physeter macrocephalus Linnaeus 1758) off the Azores

1993 ◽  
Vol 339 (1287) ◽  
pp. 67-82 ◽  
Keyword(s):  
North Atlantic ◽  
Stomach Contents ◽  
Sperm Whale ◽  
Physeter Macrocephalus ◽  
Sperm Whales ◽  
Commercial Activities ◽  
The North ◽  
The North Atlantic ◽  
Modal Mass ◽  
Neutrally Buoyant

Stomach contents from 17 sperm whales, 15 males and two females, caught during commercial activities in 1981-1984 in the Azores region were identified and measured. A total of 28 738 cephalopods and 16 fish were represented in the collections. In addition, there were tunicates in two whales and m an-m ade products in three whales. None of the stomachs were empty. Flesh was present in 94.1% and indigestible fragments alone, including mandibles (beaks) of cephalopods, were present in 5.9% of the stomachs. Twelve species of cephalopod were represented by flesh and 40 species were represented by lower beaks. The cephalopod families contributing food to the whales in this region are, in order of their contribution by estimated mass, the O ctopoteuthidae (39.8%), the Histioteuthidae (32.7%), the Architeuthidae (12.1%), the Lepidoteuthidae (4.5% ), the Ommastrephidae (3.4% ), the Pholidoteuthidae (2.1% ), the Cycloteuthidae (1.9% ), the Cranchiidae (1.7%) and eight other families each contributing less than 1 % by mass. Presence of Gonatus beaks in the stomachs show which whales have migrated southwards to the Azores just prior to capture and the presence of a large Megalocranchia species possibly shows which whales have m igrated from higher latitudes off Iceland. However, the presence of Teuthowenia maculata shows which whales came north from the West coast of Africa, just prior to capture. The modal mass of cephalopods consumed is 400-450 g which represents 0.00001 of the whales’ body mass. 77.5% of the species eaten have luminous organs and 82% of the species are neutrally buoyant. It seems likely that the sperm whale is obtaining 77% of its food by swimming through luminous shoals of slow-swimming, neutrally bouyant squids and only about 23% by chasing faster swimming, larger cephalopods. Cephalopods not previously recorded from the North Atlantic are Onychoteuthis boreali-japonicus , and Histioteuthis bonnellii corpuscula . Histioteuthis ?miranda may have been collected by the whales much further south than the Azores. Species not recorded previously in the diet of sperm whales in the North Atlantic are Ommastrephes bartrami , Gonatus steenstrupi , Histioteuthis ?miranda , H. bonnellii corpuscula , H. meleagroteuthis , Discoteuthis laciniosa , Mastigoteulhis species, Chiroteulhis species, ?Helicocranchia , Liocranchia reinhardti , and ?Liguriella .

Female philopatry in coastal basins and male dispersion across the North Atlantic in a highly mobile marine species, the sperm whale (Physeter macrocephalus)

2009 ◽  
Vol 18 (20) ◽  
pp. 4193-4205 ◽  
Author(s):  
DANIEL ENGELHAUPT ◽  
A. RUS HOELZEL ◽  
COLIN NICHOLSON ◽  
ALEXANDROS FRANTZIS ◽  
SARAH MESNICK ◽  
...  
Keyword(s):  
North Atlantic ◽  
Sperm Whale ◽  
Marine Species ◽  
Physeter Macrocephalus ◽  
Female Philopatry ◽  
The North ◽  
Coastal Basins ◽  
The North Atlantic

scholarly journals Recent Decadal Trend in the North Atlantic Wind Energy Resources

2017 ◽  
Vol 2017 ◽  
pp. 1-8 ◽  
Author(s):  
Chong Wei Zheng ◽  
Chong Yin Li ◽  
Xin Li
Keyword(s):  
Atlantic Ocean ◽  
Wind Energy ◽  
North Atlantic ◽  
North Atlantic Ocean ◽  
Climatic Trend ◽  
The North ◽  
Increasing Trend ◽  
The North Atlantic ◽  
The North Atlantic Oscillation ◽  
June July

This study presents the climatic trend of the North Atlantic wind energy using cross-calibrated, multiplatform (CCMP) wind data for the period 1988–2011. Results show the following. (1) The North Atlantic WPD exhibited a significant increasing trend of 4.45  (W/m2)/yr over the past 24 years. (2) The variation in the North Atlantic Ocean WPD shows a noticeable regional difference. More than half of the North Atlantic Ocean has a significantly increasing trend in WPD. The increasing trend in the mid-high latitudes is stronger than that in the low latitudes, and the trend is stronger in the west than in the east. The area with the strongest increasing trend is located along the southern coast of Greenland of 35 (W/m2)/yr. (3) There is a noticeable seasonal difference in the variation of WPD. The strongest increasing trend occurs in December-January-February (DJF), followed by September-October-November (SON) and March-April-May (MAM), and the weakest occurs in June-July-August (JJA). The increasing trend in different areas is dominated by different seasons. (4) There is no leading or lagging correlation between WPD and the North Atlantic Oscillation (NAO). However, there is a noticeable negative correlation between the Niño3 index and WPD in most of the North Atlantic.

Sex Hormones and Reproductive Status of the North Atlantic Fin Whales (Balaenoptera physalus) During the Feeding Season

2006 ◽  
Vol 32 (1) ◽  
pp. 75-84 ◽  
Author(s):  
Matthías Kjeld ◽  
Örn Ólafsson ◽  
Gísli A. Víkingsson ◽  
Jóhann Sigurjónsson
Keyword(s):  
Sex Hormones ◽  
North Atlantic ◽  
Reproductive Status ◽  
Balaenoptera Physalus ◽  
The North ◽  
The North Atlantic ◽  
Fin Whales

The Currents of the North Atlantic

1892 ◽  
Vol 34 (872supp) ◽  
pp. 13940-13941
Author(s):  
Richard Beynon
Keyword(s):  
North Atlantic ◽  
The North ◽  
The North Atlantic
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