Field sexing techniques for Fiordland crested penguins (tawaki; Eudyptes pachyrhynchus)

被引：0

作者：

White, Jeff ^{[1
,2
]}

Mattern, Thomas ^{[3
,4
,5
]}

Ellenberg, Ursula ^{[5
,6
]}

Garcia-Borboroglu, Pablo ^{[5
,7
]}

Houston, David M. ^{[8
]}

Seddon, Philip J. ^{[4
]}

Mays, Herman L. ^{[1
]}

机构：

[1] Marshall Univ, Dept Biol, 1 John Marshall Dr, Huntington, WV 25755 USA

[2] Univ Miami, Dept Biol, 1301 Mem Dr, Coral Gables, FL 33124 USA

[3] New Zealand Penguin Initiat, POB 6319, Dunedin, New Zealand

[4] Univ Otago, Dept Zool, POB 56, Dunedin, New Zealand

[5] Global Penguin Soc, Marcos Zar 2716, Puerto Madryn, Chubut, Argentina

[6] La Trobe Univ, Dept Ecol Environm & Evolut, Melbourne, Vic, Australia

[7] Ctr Nacl Patagon CESIMAR CONICET, Blvd Brown 2825, Puerto Madryn, Chubut, Argentina

[8] Dept Conservat, Biodivers Grp, Auckland, New Zealand

来源：

NOTORNIS | 2021年 / 68卷 / 03期

关键词：

Fiordland crested penguin; tawaki; Eudyptes pachyrhynchus; morphological sexing; molecular sexing; sexual dimorphism; morphometrics; SEXUAL-DIMORPHISM; IDENTIFICATION; ADULT;

D O I：

暂无

中图分类号：

Q95 [动物学];

学科分类号：

071002 ;

摘要：

Fiordland crested penguins (tawaki; Eudyptes pachyrhynchus) lack sexually dimorphic plumage so behavioural cues or bill size have traditionally been used to determine sex in the field. We aimed to identify morphological characters that can be quickly and reliably be measured in the field to accurately sex adult tawaki, and validated these with genetics. We measured five morphological parameters in tawaki (n = 32) from three colonies (Jackson Head, Milford Sound/ Piopiotahi, and Codfish Island/Whenua Hou) on the New Zealand South Island. We confirmed sex with a PCR-based molecular assay. Male tawaki are larger in all parameters measured and recursive partitioning trees correctly classify 94% of penguins sampled. In line with Warham (1974) and Murie et al. (1991), we propose using bill length (males > 44.5 mm) and bill depth (males > 25.5 mm) but in combination with foot length (males > 113.5 mm) to determine tawaki sex in the field. These morphological parameters are independent of body condition and are easily obtained in the field.

引用

页码：188 / 193

页数：6

共 31 条

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