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were obtained using the Elefan I Fisat II program, version 1.2.2. The growth rate of 0.07 mm/day, proposed by Nitchals ( 2014 ) for other species of gammarids under similar conditions to calculate an approximation of the intrinsic growth rate, was used to calculate the generation time. To investigate

In: Crustaceana

Infectious disease influences the dynamics of host populations and the structure of species communities via impacts on host demography. Species that share infectious diseases are well-known to interact indirectly through the process of apparent competition, but there has been little attention given to the role of vectors in these indirect interactions. Here we explore how vector-borne disease and host-vector interactions can drive apparent competitive interactions. We show that different facets of the ecology associated with vector-host-host interactions affect the structure of the three-species assemblage. Crucially, the patterns associated with invasion of alternative hosts, the spread of the infectious disease by the vector, and the dynamics of the community interactions are influenced by the mode of transmission. We highlight the role of alternative hosts on disease amplification, dilution and magnification and discuss the results with reference to recent developments in apparent competition and community structure.

In: Israel Journal of Ecology and Evolution

intrinsic growth rate,’ which does not depend on any interactions among different items but solely on linguistic properties of 16 . Crucially, this rate is assumed to depend on the item’s formal substance 17 so the intrinsic growth rate 18 is formulated as a function of 19 : 20 , 21 . The rate is defined

In: Language Dynamics and Change

a certain habitat, and r the intrinsic growth rate, i.e. , the rate of population increase without external limitations. In addition, the inflection point ( t _mid (in weeks) = 1 / 2 K ), the doubling time (DT), i.e. , the average time (weeks) needed to double the population

In: Nematology

space for growth than smaller hosts. Secondly, the intrinsic growth rates of fish in the host population are also likely to be of importance. Al- though interpopulation variation in intrinsic growth rates in sticklebacks has been documented (Wright et al., 2004), the implications for patterns of host

In: Behaviour

estimated using this routine: L t D L 1 f 1 ¡ e ¡ K . t ¡ t 0 / g where L t is the length at age t, L 1 is the asymptotic length, K is the intrinsic growth rate (curvature parameter) and t 0 is the computed age at length zero. 1126 NATÁLIA DIAS & MARTIN SPRUNG Growth curves of females and males were

In: Crustaceana
Author: Wootton

stickleback ( Gasterosteus aculeatus ) in Llyn Frongoch an upland Welsh lake. — Freshwater Biol. 14, p. 335-346. Al-Shamma’a, A.A.M.-H. (1986). The feeding ecology of fish in Llyn Frongoch. — Ph.D. Thesis, University of Wales, p. 118. Arendt, J.D. (1997). Adaptive intrinsic growth rates: An integration across

In: Behaviour

. Oecologia 131 : 186 - 195 . Arendt J.D. ( 1997 ): Adaptive intrinsic growth rates: an integration across taxa . Q. Rev. Biol. 7 : 149 - 177 . Arendt J.D. ( 2009 ): Influence of sprint speed and body size on predator avoidance in New Mexican spadefoot toads ( Spea multiplicata

In: Amphibia-Reptilia

¡ [ K D.t ¡ t 0 / C C.K D= 2 ¼/ sin 2 ¼.t ¡ t s / ] ² 1 =D Where: L t D length of the organism at a given moment t ; L 1 D maximum possible length of the organism; K D intrinsic growth rate; t 0 D instant when the organism would have a length equal to zero; t s D time interval between start of growth

In: Crustaceana

. Conover D.O. ( 2006 ). Evolution of intrinsic growth rate: metabolic costs drive trade-offs between growth and swimming performance in Menidia menidia . — Evolution 60 : 1269 - 1278 . Basic D. Winberg S. Schjolden J. Krogdahl A. Höglund E. ( 2012 ). Context

In: Behaviour