Rats and prions at Tristan da Cunha Island

被引：0

作者：

Dilley, Ben J. ^{[1
,2
]}

Davies, Delia ^{[1
,2
]}

Repetto, Julian ^{[2
]}

Swain, George ^{[2
]}

Ryan, Peter G. ^{[1
]}

机构：

[1] Univ Cape Town, FitzPatrick Inst African Ornithol, Rondebosch, South Africa

[2] Govt Tristan Cunha, Conservat Depteng, Tristan Da Cunha, St Helena

来源：

OSTRICH | 2020年 / 91卷 / 03期

关键词：

burrow-nesting petrels; egg depredation; island invasives; rat depredation; seabirds; MICE MUS-MUSCULUS; BREEDING SUCCESS; PETREL;

D O I：

10.2989/00306525.2020.1771622

中图分类号：

Q95 [动物学];

学科分类号：

071002 ;

摘要：

Tristan da Cunha is a 96 km(2)volcanic island in the South Atlantic Ocean. Black RatsRattus rattusreached the island from a shipwreck in 1882 and their depredation of seabirds' eggs and chicks are likely partly responsible for the much lower densities of burrow-nesting petrels, compared with adjacent rodent-free islands in the archipelago. We monitored a colony of Broad-billed PrionsPachyptila vittatabreeding in a coastal cliff cave in 2015/2016, where a maximum of 6% of chicks survived from 310 nests. We suspect rats frequently depredated eggs (36% of eggs were found broken with rat bite marks) and infrared trail cameras recorded how rats repeatedly hassled chicks, although no direct chick depredations were recorded.

引用

页码：240 / 243

页数：4

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