Voorbeelden van petrel

• The protection of southern giant petrels should be increased by having a minimum distance of 50 m for all visitors.

• The authors suggest a concentration of tourists when visiting southern giant petrel breeding sites to reduce repeated heart-rate increases and behavioural changes.

• The current book is a work dedicated to three families of seabirds, namely albatrosses, petrels, and shearwaters.

• Therefore, the lower natural disturbance boundary was used as a reference for identifying the recommended minimum distance to southern giant petrels.

• During nest counts, the behaviour of southern giant petrels in terms of relevant distances to tourists was also observed.

• The only monitoring study on a burrowing species since cats were eradicated has been for white-chinned petrels.

• In 1982 the author assisted in a project on the chemical composition of blue petrel chick guano.

• At this time of year, prions and petrels are active.

• The populations of storm petrels were estimated by nocturnal calls of the birds.

• Four pairs of southern giant petrels in a frequently visited area of the island were compared with four in a rarely visited area.

• This perhaps unparalleled breadth of comparative study on petrels undertaken over 30 years is reflected in the general chapters, as important insights often come from personal experience.

• Cape petrels breed on one rock in the rarely visited south of the island.

• Skuas, snow petrels, and a solitary giant petrel enlivened the trip.

• Southern giant petrels moved their breeding sites to the western part of the island, which could have been caused by increased visitation.

• A historical background to the group is given, and we learn that the first petrels can be found in fossils aged between 40 and 45 million years old.