...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Marine Biology: International Journal on Life in Oceans and Coastal Waters >Spatial and temporal variation in the diet of a high trophic level predator, the Australian fur seal (Arctocephalus pusillus doriferus)
【24h】

Spatial and temporal variation in the diet of a high trophic level predator, the Australian fur seal (Arctocephalus pusillus doriferus)

机译：

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

This study quantifies the manner in which Australian fur seals, Arctocephalus pusillus doriferus, use their prey in a spatial and temporal context. We analysed 977 scat and 66 regurgitate samples collected from Tasmanian breeding colonies and haul-outs between 1994 and 2000. Diagnostic prey remains identified in the scats represented 35 fish taxa and 8 cephalopod taxa. The main taxa identified in scats, where frequency of occurrence was ≥10, were leatherjacket species (family Monocanthidae), redbait (Emmelichthys nitidus), barracouta (Thyrsites atun), jack mackerel (Trachurus declivis) and red cod (Pseudophysis bachus). Regurgitates were dominated by cephalopods, primarily Goulds squid (Nototodarus gouldi), Octopus maorum, O. berrima/pallidus and Sepia apama. Discriminant function analyses indicated that there were generally no significant differences in the composition of the diet between colonies within a year, suggesting that prey distribution is fairly uniform throughout Bass Strait at those time scales. The diet at breeding colonies, however, exhibited significant inter- and intra-annual variation, determined by the presence of several key taxa, such as barracouta and a species of scorpionfish (family Scorpaenidae). The diet composition also varied regionally, between Bass Strait and southern Tasmania in spring 1999 and autumn 2000, with redbait, barracouta and a species of scorpionfish identified as the main taxa contributing to this difference. Redbait occurred in the diet only in southern Tasmania, whereas barracouta and scorpionfish occurred only in Bass Strait.

著录项

  • 来源
  • 作者

    F. Hume; M. A. Hindell; D. PembertonR. Gales;

  • 作者单位

    Private Bag 10, 7140 New Norfolk, Tasmania, Australia;

    Antarctic Wildlife Research Unit, School of Zoology, University of Tasmania, PO Box 252-05, 7001 Hobart, Tasmania, Australia;

    Tasmanian Museum and Art Gallery, GPO Box 1164, 7001 Hobart, Tasmania, AustraliaMarine Conservation Unit, Nature Conservation Branch, Department of Primary Industries, Water and Environment, Box 44, 7001 Hobart, Tasmania, Australia;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 英语
  • 中图分类 环境生物学;
  • 关键词

相似文献

  • 外文文献
  • 中文文献
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号