Photography and christian mission: George Brown`s images of the New Britain mission 1875-80

In 1875, Methodist George Brown arrived in the Bismarck Archipelago to establish the New Britain Mission. Based in the Duke of York Islands, Brown's territory covered New Ireland and the Gazelle Peninsula of New Britain. The mission was one of the first to be photographed from its inception. The Australian Museum holds 96 plates from the first five years of the mission. Brown's photographs are a visual record of conditions and peoples of the time. Analysed in relation to Brown's writings they are indicative of the relationships and bonds established through photography both in the mission field and across wider scientific and church audiences. The methodology employed here also challenges the kinds of interpretations of photographs that can arise from visual analyses relying solely on the caption and the posing of the subject.

Thermal acclimation to 4 or 10 degrees C imparts minimal benefit on swimming performance in Atlantic cod (Gadus morhua L.).

Thermal acclimation is frequently cited as a means by which ectothermic animals improve their Darwinian fitness, i.e. the beneficial acclimation hypothesis. As the critical swimming speed (U (crit)) test is often used as a proxy measure of fitness, we acclimated Atlantic cod (Gadus morhua) to 4 and 10 degrees C and then assessed their U (crit) swimming performance at their respective acclimation temperatures and during acute temperature reversal. Because phenotypic differences exist between different populations of cod, we undertook these experiments in two different populations, North Sea cod and North East Arctic cod. Acclimation to 4 or 10 degrees C had a minimal effect on swimming performance or U (crit), however test temperature did, with all groups having a 10-17% higher U (crit) at 10 degrees C. The swimming efficiency was significantly lower in all groups at 4 degrees C arguably due to the compression of the muscle fibre recruitment order. This also led to a reduction in the duration of "kick and glide" swimming at 4 degrees C. No significant differences were seen between the two populations in any of the measured parameters, due possibly to the extended acclimation period. Our data indicate that acclimation imparts little benefit on U (crit) swimming test in Atlantic cod. Further efforts need to identify the functional consequences of the long-term thermal acclimation process.

C. L. Reinhold's Anleitung zur Kenntniß und Beurtheilung der Philosophie in ihren sämmtlichen Lehrgebäuden : ein Lehrbuch für Vorlesungen und Handbuch für eigenes Studium

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