Peter Fretwell (British Antarctic Survey, Madingley Road, Cambridge, UK) and colleagues have published in the ornithological journal Ibis on using satellite imagery to count breeding albatrosses.

The paper’s abstract follows:

“This study is the first to utilize 30-cm resolution imagery from the WorldView-3 (WV-3) satellite to count wildlife directly. We test the accuracy of the satellite method for directly counting individuals at a well-studied colony of Wandering Albatross Diomedea exulans at South Georgia, and then apply it to the closely related Northern Royal Albatross Diomedea sanfordi, which is near-endemic to the Chatham Islands and of unknown recent population status due to the remoteness and limited accessibility of the colonies. At South Georgia, satellite-based counts were comparable to ground-based counts of Wandering Albatross nests, with a slight over-estimation due to the presence of nonbreeding birds. In the Chatham Islands, satellite-based counts of Northern Royal Albatross in the 2015/2016 season were similar to ground-based counts undertaken on the Forty-Fours islands in 2009/2010, but much lower than ground-based counts undertaken on The Sisters islands in 2009/2010, which is of major conservation concern for this endangered albatross species. We conclude that the ground-breaking resolution of the newly available WV-3 satellite will provide a step change in our ability to count albatrosses and other large birds directly from space without disturbance, at potentially lower cost and with minimal logistical effort.”

(A) Part of the WorldView-3 satellite image of Bird Island showing the distribution of white dots; (B) photograph of Bird Island for comparison; (C) close-up of a representative white dot in (a), indicating pixel composition

Read more here and watch a video about the study here.

With thanks to Barry Baker and Richard Phillips for information and photographs.

Reference:

Fretwell, P.T., Scofield, P. & Phillips, R.A. 2017.  Using super-high resolution satellite imagery to census threatened albatrosses.  Ibis DOI: 10.1111/ibi.12482.  Click here for a PDF.

John Cooper, ACAP Information Officer, 08 May 2017

David Costantini (Muséum National d'Histoire Naturelle, Paris, France) and colleagues have published in the journal Science of The Total Environment on levels of persistent organic pollutants (POPs) in Scopoli's Shearwater Calonectris diomedea.

The paper’s abstract follows:

“Little is known about the accumulation of persistent organic pollutants (POPs) and its consequences for seabirds in the Mediterranean basin. We characterised the plasma contaminant profile (polychlorinated biphenyls ΣPCBs; organochlorine pesticides ΣOCPs; polybrominated diphenyl ethers ΣPBDEs) of a population of the seabird Scopoli's shearwater (Calonectris diomedea) that breeds in the southern Mediterranean (Linosa Island) and investigated (i) whether sex, stable isotope ratios (related to diet), reproductive phase (early incubation vs. late breeding season) and body mass explained variation in contaminant burden and (ii) whether they predict health-related variables. The predominant category of POPs was ΣPCBs contributing between 53.0 and 92.4% of the total POPs in each shearwater. The percentage contribution of ΣOCPs to total POPs ranged between 7.6 and 47.0%, while that of ΣPBDEs ranged between < 1% and 22.1%. Near the end of the breeding season, concentrations of ΣPCBs, ΣOCPs and ΣPOPs were significantly higher than at the beginning of the incubation period. ΣPBDEs were higher in males than females near the end of the breeding season, while they were higher in females than males at the beginning of the egg incubation period. Carbon- and nitrogen isotope ratios and individual body mass were not significantly associated with any contaminant class. Mates differed in the concentration of POPs, but they had similar stable isotope values. There was little evidence for a connection between contaminants and blood-based markers of oxidative balance. None of the contaminants predicted the probability of a bird being resighted as a breeder the following year. Thus, although POPs were present at high concentrations in some individuals, our study suggests little concern regarding POP exposure for this shearwater population.”

Fledgling Scopoli's Shearwater

Reference:

Costantini, D., Sebastiano, M., Müller, M.S., Eulaers, I., Ambus, P., Malarvannan, G., Covaci, A., Massa, B. & Dell'Omo, G. 2017.  Individual variation of persistent organic pollutants in relation to stable isotope ratios, sex, reproductive phase and oxidative status in Scopoli's shearwaters (Calonectris diomedea) from the Southern Mediterranean.  Science of The Total Environment 15: 179-187.

John Cooper, ACAP Information Officer, 05 May 2017

Will Chatfield-Taylor (Olsson Associates, Overland Park, Kansas, USA) has published open-access in the journal Marine Ornithology on the breeding and foraging distribution of Audubon’s Shearwaters Puffinus lherminieri in the Caribbean in relation to predictable thermal fronts.

The paper’s abstract follows:

“This study aims to better understand how the nesting distribution of Audubon’s Shearwaters Puffinus lherminieri in the Caribbean is associated with the location of predictable ocean fronts, in turn reflecting the different foraging strategies employed by males and females during their pre-laying exodus. The study compares the spatial distribution of bathymetric features — generators of fronts — relative to the pre-laying exodus foraging areas of male and female shearwaters in 89 known nesting locations and in a control group of 5 621 remaining islands in the Caribbean. For each location, the density of potential locations within the foraging radius of males (270 km) and females (270– 850 km) was calculated by geographic information system (GIS) analysis. Foraging sites for males tended to be more densely aggregated and those for females less densely aggregated when compared with the controls, but, for both, a correlation between the proximity of nesting locations and likely frontal regions was clear. These data indicate that nesting locations appear to be associated with predictable thermal fronts. This strategy improves the shearwaters’ access to food sources during the pre-laying exodus.”

Audubon's Shearwater

Reference:

Chatfield-Taylor, W. 2017. Caribbean Audubon’s Shearwaters Puffinus lherminieri choose nesting locations that improve male and female pre-laying exodus foraging strategies. Marine Ornithology 45: 103-106.

John Cooper, ACAP Information Officer, 4 May 2017

The Spanish Ministry of Agriculture and Fisheries, Food and the Environment has imposed a fine of almost 5.3 million Euros on six companies and six natural persons involved in illegal fishing operations following raids on fishing companies in the provinces of A Coruña and Pontevedra in July 2015.  During the raids by the Ministry's inspection services documents were seized which were determined to have been aimed at concealing the ownership, management and operation of the fishing vessels Viking and Seabull 22.

Both these ships had been identified by international agencies such as the Commission for the Conservation of Antarctic Marine Living Resources (CCAMLR) and the South East Atlantic Fisheries Organization (SEAFO) as vessels involved in Illegal, Unreported and Unregulated (IUU) fishing for Patagonian Toothfish Dissostichus eleginoides and other fish in the Atlantic using longlines and gill nets. The two vessels had been added to the European Union’s list of IUU vessels in 2010.

Seabull 22

Viking

IUU poachers in the Southern Ocean are thought to have caused considerable mortality of ACAP-listed albatrosses and petrels, as they are presumed not to bother to adopt mitigation measures, such as the deployment of bird-scaring lines.

The Ministry reports that “in order to obstruct the pursuit of their activities, in addition to using interposed companies of different nationalities, those responsible usually changed the name of the vessels”.  The two ships are no longer fishing: the Viking was sunk by Indonesian authorities off its coast last year (click here) and Seabull 22 was reported as having been scrapped in Cape Verde.

The Viking gets scuttled

“The sanctioning order also declares six natural persons linked to those companies responsible for several infractions for having maintained relations of diverse nature with these ships, prohibited by national, community and international regulations. The economic penalty applied to these six persons amounts to EUR 2.82 million. All these sanctions amount to a total of EUR 5,27 million, and they are added to sanctions for disqualification for fishing activities ranging from 5 to 14 years, and the prohibition to obtain subsidies and public aid in periods ranging between 5 and 12 years.  In addition, one of the individuals implicated is sanctioned for obstruction to the document inspection and destruction tasks, with a fine of EUR 60,000.”

“Community law prohibits nationals of Member States from granting any form of aid to IUU fishing or directly or indirectly benefiting from the activity of vessels included in the Community list of vessels of this type of activity fishery.”

Read more here and here.

With thanks to Mark Tasker.

John Cooper, ACAP Information Officer, 03 May 2017