Predation can increase the prevalence of infectious disease

被引:82
作者
Holt, Robert D. [1 ]
Roy, Manojit [1 ]
机构
[1] Univ Florida, Dept Zool, Gainesville, FL 32611 USA
关键词
host-pathogen; predator-prey; regulation; immunity;
D O I
10.1086/513188
中图分类号
Q14 [生态学(生物生态学)];
学科分类号
071012 ; 0713 ;
摘要
Many host-pathogen interactions are embedded in a web of other interspecific interactions. Recent theoretical studies have suggested that reductions in predator abundance can indirectly lead to upsurges in infectious diseases harbored by prey populations. In this note, we use simple models to show that in some circumstances, predation can actually increase the equilibrial prevalence of infection in a host, where prevalence is defined as the fraction of host population that is infected. Our results show that there is no complete generalization possible about how shifts in predation pressure translate into shifts in infection levels, without some understanding of host population regulation and the role of acquired immunity. Our results further highlight the importance of understanding the dynamics of nonregulatory pathogens in reservoir host populations and the understudied effects of demographic costs incurred by individuals that survive infection and develop acquired immunity.
引用
收藏
页码:690 / 699
页数:10
相关论文
共 22 条
[1]   Host densities as determinants of abundance in parasite communities [J].
Arneberg, P ;
Skorping, A ;
Grenfell, B ;
Read, AF .
PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES, 1998, 265 (1403) :1283-1289
[2]   Shifting baselines and the decline of pelagic sharks in the Gulf of Mexico [J].
Baum, JK ;
Myers, RA .
ECOLOGY LETTERS, 2004, 7 (02) :135-145
[3]   A common rule for the scaling of carnivore density [J].
Carbone, C ;
Gittleman, JL .
SCIENCE, 2002, 295 (5563) :2273-2276
[4]   EFFECTS OF HANTAVIRAL INFECTION ON SURVIVAL, GROWTH AND FERTILITY IN WILD RAT (RATTUS-NORVEGICUS) POPULATIONS OF BALTIMORE, MARYLAND [J].
CHILDS, JE ;
GLASS, GE ;
KORCH, GW ;
LEDUC, JW .
JOURNAL OF WILDLIFE DISEASES, 1989, 25 (04) :469-476
[5]  
Collinge S. K., 2006, DIS ECOLOGY COMMUNIT
[6]   Parasite establishment and host extinction in model communities [J].
de Castro, F ;
Bolker, BM .
OIKOS, 2005, 111 (03) :501-513
[7]   The combined effects of pathogens and predators on insect outbreaks [J].
Dwyer, G ;
Dushoff, J ;
Yee, SH .
NATURE, 2004, 430 (6997) :341-345
[8]   INFECTION WITH A RATBORNE HANTAVIRUS IN UNITED-STATES RESIDENTS IS CONSISTENTLY ASSOCIATED WITH HYPERTENSIVE RENAL-DISEASE [J].
GLASS, GE ;
WATSON, AJ ;
LEDUC, JW ;
KELEN, GD ;
QUINN, TC ;
CHILDS, JE .
JOURNAL OF INFECTIOUS DISEASES, 1993, 167 (03) :614-620
[9]   Selective predation and productivity jointly drive complex behavior in host-parasite systems [J].
Hall, SR ;
Duffy, MA ;
Cáceres, CE .
AMERICAN NATURALIST, 2005, 165 (01) :70-81
[10]   A predator-prey model with infected prey [J].
Hethcote, HW ;
Wang, WD ;
Han, LT ;
Zhien, M .
THEORETICAL POPULATION BIOLOGY, 2004, 66 (03) :259-268