NAMMCO Scientific Publication  

Mario Acquarone

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Daniel G Pike

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Daniel G Pike, Gísli A Víkingsson, Thorvaldur Gunnlaugsson, Nils Øien

The distribution and abundance of blue whales (Balaenoptera musculus) was assessed from ship surveys conducted in the Central and Northeast Atlantic in 1987, 1989, 1995 and 2001. Blue whales were most commonly sighted off western Iceland, and to a lesser ... see more

Nils Øien

The abundances of large whale species are presented for the northeast Atlantic from near-complete survey coverage in 1995 and from multiple partial-area surveys during 1996-2001. These Norwegian shipboard surveys were generally conducted with 2 independen... see more

Gísli A Víkingsson, Daniel G Pike, Geneviève Desportes, Nils Øien, Thorvaldur Gunnlaugsson, Dorete Bloch

North Atlantic Sightings Surveys (NASS) is a series of large scale international cetacean line transect surveys, conducted in 1987, 1989, 1995 and 2001, that covered a large part of the central and eastern North Atlantic. Target species were fin (Balaenop... see more

Thorvaldur Gunnlaugsson, Gisli A Víkingsson, Daniel G Pike

Sperm whales (Physeter macrocephalus) pose a particular problem to shipboard surveys as they dive for extended periods and are therefore likely to be missed (not available) even if they are right under the track line. To address these problems the NAMMCO ... see more

Daniel G Pike, Thorvaldur Gunnlaugsson, Gísli A Víkingsson, Geneviève Desportes, Dorete Bloch

North Atlantic Sightings Surveys for cetaceans were carried out Northeast and Central Atlantic in 1987, 1989, 1995 and 2001. Here we provide estimates of density and abundance for minke whales from the Faroese and Icelandic ship surveys. The estimates are... see more

David L Borchers, Daniel G Pike, Thorvaldur Gunnlaugsson, Gísli A Víkingsson

We estimate the abundance of minke whales (Balaenoptera acutorostrata) from the Icelandic coastal shelf aerial surveys carried out as part of the 1987 and 2001 North Atlantic Sightings Surveys (NASS). In the case of the 1987 survey, the probability of det... see more

Lars Witting, Daniel G Pike

A comparative study between aerial cue–counting and digital photography surveys for minke whales conducted in Faxa?ói Bay in September 2003 is used to check the perpendicular distances estimated by the cue-counting observers. The study involved 2 aircraft... see more

Daniel G Pike, Charles GM Paxton, Thorvaldur Gunnlaugsson, Gísli A Víkingsson

Aerial surveys were carried out in coastal Icelandic waters 4 times between 1986 and 2001 as part of the North Atlantic Sightings Surveys. The surveys had nearly identical designs in 3 of the 4 years. The target species was the minke whale (Balaenoptera a... see more

Charles GM Paxton, M Louise Burt, Sharon L Hedley, Gísli A Víkingsson, Thorvaldur Gunnlaugsson, Geneviève Desportes

Generalized additive models (GAMs) with spatially referenced covariates were fitted to data collected during the 1995 and 2001 Icelandic (shipboard and aerial) and Faroese (shipboard only) components of the North Atlantic Sightings Surveys (NASS-95 and NA... see more

Tim D Smith, Daniel G Pike

We know more about the North Atlantic humpback whale (Megaptera novaeangliae) than we do for virtually any other cetacean, yet attempts to use this information to describe the status of the populations in this ocean basin have not proven satisfactory. The... see more

Mette Skern-Mauritzen, Hans Julius Skaug, Nils Øien

Cetacean observations obtained during sighting surveys for abundance estimation can also be used to investigate cetacean habitat and prey selection, the principal processes underlying cetacean distributions. In this paper, we investigate habitat and prey ... see more

Ana Cañadas, Greg P Donovan, Geneviève Desportes, David L Borchers

This paper uses data from 3 programmes: (1) the North Atlantic Sightings Surveys (NASS) surveys undertaken throughout much of the central and eastern North Atlantic north of about 40° N in 1987, 1989, 1995 and 2001; (2) the MICA-93 programme; and (3) the ... see more

Tim D Smith

Declining rates of encountering whales, including both sighting and catching, were noted by whalers throughout the 19th century, and these declines became the first indication that whaling was adversely affecting whale abundance. The interpretation of dec... see more