title: Low genetic variability in small populations of New Zealand kokako Callaeas cinerea wilsoni

authors: Hudson, Q.J.

subjects: kokako

abstract: The endangered kokako Callaeas cinerea wilsoni (Callaeidae), an endemic forest-dwelling passerine of New Zealand, has declined over the last century to a number of small isolated populations due to widespread habitat clearance and predation by introduced predators. To evaluate the genetic consequences of inbreeding and genetic drift, we examined genetic variability within and among 3 of the major remaining kokako populations using 4 polymorphic microsatellite loci. The largest remaining kokako population in the Te Ureweras was shown to have greater variability than the smaller Mapara and Rotoehu populations. Differentiation among the populations was low to moderate. We suggest there is no genetic barrier to translocations between the populations and that translocations of some individuals between the remaining kokako populations could enhance genetic variability of small populations to levels found in larger populations (e.g. Te Ureweras).

text: Low genetic variability in small populations of New Zealand kokako Callaeas cinerea wilsoni The endangered kokako Callaeas cinerea wilsoni (Callaeidae), an endemic forest-dwelling passerine of New Zealand, has declined over the last century to a number of small isolated populations due to widespread habitat clearance and predation by introduced predators. To evaluate the genetic consequences of inbreeding and genetic drift, we examined genetic variability within and among 3 of the major remaining kokako populations using 4 polymorphic microsatellite loci. The largest remaining kokako population in the Te Ureweras was shown to have greater variability than the smaller Mapara and Rotoehu populations. Differentiation among the populations was low to moderate. We suggest there is no genetic barrier to translocations between the populations and that translocations of some individuals between the remaining kokako populations could enhance genetic variability of small populations to levels found in larger populations (e.g. Te Ureweras).

year: 2000

title: Experimental characterization of the fracture properties of pultruded GFRP structural elements

authors: Abbaszadeh, Hadi

abstract: Pultruded Fiber Reinforced Polymers (FRPs) are a class of novel composite materials with remarkable strength (comparable or even greater to that of steel) and resistance to environmental effects. However, the strongly orthotropic behavior of these materials and the relatively high deformability and spatial variability in mechanical properties bring challenges to the widespread adoption of these elements in structural applications. To this end, the orientation and distribution of the fibers are the most influential parameters that affect both the ultimate strength and stiffness of the specimens. This work presents an experimental campaign conducted on GFRP specimens in uniaxial tension and 3-point bending; coupon specimens with three different fibers orientations (namely 0, 45, and 90 degrees) were tested to characterize the ultimate strength and failure modes Results of such experimental campaign are first presented, and detailed statistical measures of the so-obtained strength values are presented with the ultimate goal of characterizing the variability in mechanical properties in commercially available profiles.

text: Experimental characterization of the fracture properties of pultruded GFRP structural elements Pultruded Fiber Reinforced Polymers (FRPs) are a class of novel composite materials with remarkable strength (comparable or even greater to that of steel) and resistance to environmental effects. However, the strongly orthotropic behavior of these materials and the relatively high deformability and spatial variability in mechanical properties bring challenges to the widespread adoption of these elements in structural applications. To this end, the orientation and distribution of the fibers are the most influential parameters that affect both the ultimate strength and stiffness of the specimens. This work presents an experimental campaign conducted on GFRP specimens in uniaxial tension and 3-point bending; coupon specimens with three different fibers orientations (namely 0, 45, and 90 degrees) were tested to characterize the ultimate strength and failure modes Results of such experimental campaign are first presented, and detailed statistical measures of the so-obtained strength values are presented with the ultimate goal of characterizing the variability in mechanical properties in commercially available profiles.

year: 2023

title: Boy, Oh Boy!: An interview with Taika Waititi

authors: Lealand, Geoff

subjects: film

abstract: An Interview with Taika Waititi.

text: Boy, Oh Boy!: An interview with Taika Waititi An Interview with Taika Waititi.

year: 2011