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Westland petrels and hoki fishery waste: opportunistic use of a readily available resource?

Notornis, 49 (3), 139-144

A.N.D. Freeman; K.-J. Wilson (2002)

Article Type: Paper

The importance of fisheries waste in the diet of Westland petrels (Procellaria westlandica) was assessed using 3 different techniques. Dietary studies showed that during the hoki (Macruronus novaezelandiae) fishing season (mid June – early September), fish waste formed c. 63% of the solid food brought back to the colony and fed to chicks. After the hoki season, fisheries waste contributed only c. 25% to the diet. A survey of Westland petrels at sea found that, although vessels fishing for hoki influence the petrels’ distribution, only a small proportion of the population appears to use this food resource at any one time. Satellite tracking showed that, on average, birds spent 1/3rd of each foraging trip near vessels, but they foraged over much wider areas than those occupied by the fishing fleets. Although fishery waste now forms a substantial component of the Westland petrel’s diet, the situation suggests opportunistic use of a readily available resource, rather than dependence.







Courting Terns

Southern Bird, 6 (Jun), 3-3

H. Clifford (2001)

Article Type: Article






A fossil vertebrate fauna accumulated by laughing owls (Sceloglaux albifacies) on the Gouland Downs, northwest Nelson, South Island

Notornis, 48 (4), 225-233

T.H. Worthy (2001)

Article Type: Paper

A rich fossil fauna accumulated by laughing owls (Sceloglaux albifacies) during the Holocene, is described from GD101 Cave, on the Gouland Downs, northwest Nelson, South Island, New Zealand. Twenty-eight species of bird, a tuatara, 3 frogs, at least 4 geckos, 1 skink, 2 bats, and 2 fish contribute to the species diversity. The fauna includes the first inland fossil record of New Zealand dotterel (Charadrius obscurus). The taphonomy of the deposit and the diet of the owl are discussed.