Power of monitoring surveys to detect abundance trends in depleted populations: the effects of density-dependent habitat use, patchiness, and climate change

被引:44
作者
Blanchard, Julia L. [1 ]
Maxwell, David L. [1 ]
Jennings, Simon [1 ]
机构
[1] Ctr Environm Fisheries & Aquaculture Sci, Lowestoft NR33 0HT, Suffolk, England
关键词
climate change; density-dependent habitat use; ecosystem approach to fisheries; fish population; monitoring; survey design; trawl survey;
D O I
10.1093/icesjms/fsm182
中图分类号
S9 [水产、渔业];
学科分类号
0908 ;
摘要
Traditionally, trawl surveys were designed to collect fishery-independent data for assessing the population dynamics of commercially exploited species. However, trawl survey data are increasingly used to describe the abundance, distribution and ecology of a wide range of species in studies of climate change and fishing effects. These new uses of survey data suggest that improved understanding of the value and limitations of existing survey designs is required. We compared the power of different survey designs (where stations are fixed, fixed stratified, random, or random stratified) to detect known trends in the abundance of depleted populations. Modelled populations were characterized by different temperature preference, density-dependent habitat selection, and patterns of small-scale aggregation (patchiness). Temperature preferences and local patchiness had an influence on the power of different surveys to detect increases in abundance, and in some scenarios, survey-area indices would consistently underestimate or overestimate trends in overall abundance. As the distributions of many fish populations have shifted in response to climate change, exhibit distribution-abundance relationships, and have been depleted by fishing, we conclude that survey indices may provide partial or unreliable information on changes in the true abundance of the wider range of species now of interest. To disentangle the effects of fishing, climate, and biology on the abundance of fish populations, and to monitor the depletion and recovery of species threatened by fishing, there should be greater emphasis on coordinating the timing, areas of coverage, and methods of sampling of surveys of the Northeast Atlantic continental shelf.
引用
收藏
页码:111 / 120
页数:10
相关论文
共 46 条
[1]  
[Anonymous], 1990, DYNAMIC GEOGRAPHY MA
[2]   Long-term increases in prevalence of North Sea fishes having southern biogeographic affinities [J].
Beare, DJ ;
Burns, F ;
Greig, A ;
Jones, EG ;
Peach, K ;
Kienzle, M ;
McKenzie, E ;
Reid, DG .
MARINE ECOLOGY PROGRESS SERIES, 2004, 284 :269-278
[3]  
Berkeley SA, 2004, FISHERIES, V29, P23, DOI 10.1577/1548-8446(2004)29[23:FSVPOA]2.0.CO
[4]  
2
[5]   The food-unlimited growth rate of Atlantic cod (Gadus morhua) [J].
Björnsson, B ;
Steinarsson, A .
CANADIAN JOURNAL OF FISHERIES AND AQUATIC SCIENCES, 2002, 59 (03) :494-502
[6]   Do climate and fishing influence size-based indicators of Celtic Sea fish community structure? [J].
Blanchard, JL ;
Dulvy, NK ;
Jennings, S ;
Ellis, JR ;
Pinnegar, JK ;
Tidd, A ;
Kell, LT .
ICES JOURNAL OF MARINE SCIENCE, 2005, 62 (03) :405-411
[7]   Distribution-abundance relationships for North Sea Atlantic cod (Gadus morhua):: observation versus theory [J].
Blanchard, JL ;
Mills, C ;
Jennings, S ;
Fox, CJ ;
Rackham, BD ;
Eastwood, PD ;
O'Brien, CM .
CANADIAN JOURNAL OF FISHERIES AND AQUATIC SCIENCES, 2005, 62 (09) :2001-2009
[8]   DISAPPEARANCE OF COMMON SKATE RAIA-BATIS FROM IRISH SEA [J].
BRANDER, K .
NATURE, 1981, 290 (5801) :48-49
[9]  
*BTO, 2006, INTRO BREED BIRD SUR
[10]   Diversity and community structure of epibenthic invertebrates and fish in the North Sea [J].
Callaway, R ;
Alsvåg, J ;
de Boois, I ;
Cotter, J ;
Ford, A ;
Hinz, H ;
Jennings, S ;
Kröncke, I ;
Lancaster, J ;
Piet, G ;
Prince, P ;
Ehrich, S .
ICES JOURNAL OF MARINE SCIENCE, 2002, 59 (06) :1199-1214