How overfishing a large piscine mesopredator explains growth in Ross Sea penguin populations: A framework to better understand impacts of a controversial fishery

被引:20
作者
Ainley, David G. [1 ]
Crockett, Elizabeth L. [2 ]
Eastman, Joseph T. [3 ]
Fraser, William R. [4 ]
Nur, Nadav [5 ]
O'Brien, Kristin [6 ]
Salas, Leo A. [5 ]
Siniff, Donald B. [7 ]
机构
[1] HT Harvey & Associates Ecolog Consultants, Los Gatos, CA 95032 USA
[2] Ohio Univ, Dept Biol Sci, Athens, OH 45701 USA
[3] Ohio Univ, Dept Biomed Sci, Athens, OH 45701 USA
[4] Polar Oceans Res Grp, Sheridan, MT 59749 USA
[5] Point Blue Conservat Sci, Petaluma, CA 94954 USA
[6] Univ Alaska, Inst Arctic Biol, Fairbanks, AK 99775 USA
[7] Univ Minnesota, Dept Ecol Evolut & Behav, St Paul, MN 55108 USA
基金
美国国家科学基金会;
关键词
Adelie penguin; Antarctic toothfish; Mesopredator; Neutral buoyancy; Predation release; Trophic competition; Integral population models; PLEURAGRAMMA-ANTARCTICUM PISCES; ADELIE PENGUIN; PYGOSCELIS-ADELIAE; MCMURDO SOUND; MARINE ECOSYSTEM; PACIFIC SECTOR; ICE; NOTOTHENIIDAE; TOOTHFISH; BEHAVIOR;
D O I
10.1016/j.ecolmodel.2016.12.021
中图分类号
Q14 [生态学(生物生态学)];
学科分类号
071012 ; 0713 ;
摘要
We herein review the modeling approach of Pinkerton et al. (2016, Ecol. Modelling), who tested the hypothesis that fishery depletion of large, neutrally buoyant Antarctic toothfish (Dissostichus mawsoni) was implicated in the recent increase in the southern Ross Sea population of Adelie penguins (Pygoscelis adeliae). Toothfish are a trophic competitor of penguins for Antarctic silverfish (Pleuragramma antarctica) in the southern Ross Sea, hence Ainley et al. (2013) and Lyver et al. (2014) proposed that the effect of the removal of toothfish was through predation release of silverfish. Pinkerton et al. concluded that predation release could not provide sufficient energy to sustain the observed penguin population growth. Critically, however, they failed to consider certain spatial and size-by-depth aspects of diet overlap, and mechanisms associated with population dynamics that could cause the population growth through predation release. In order to effectively test the prey release hypothesis, we suggest a strong inference path that incorporates what we know about population dynamics in penguins and Ross Sea food webs into life history parameterizations of penguins, toothfish and silverfish population dynamics models. (C) 2017 Elsevier B.V. All rights reserved.
引用
收藏
页码:69 / 75
页数:7
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