SPERM WHALE DIVES TRACKED BY RADIO TAG TELEMETRY

Dives of a 12-m sperm whale ( Physeter catodon Linnaeus, 1758) were tracked in the southeast Caribbean by long range, 30 MHz radio tag with dive-profile telemetry over 4.6 d, 26 April-1 May 1995. Over the 295-km track, average speed was 0.7 m/sec (2.6 km/h). Of 158 dives (defined as submergences longer than 3 min), 65 were shallow (<200 m). The 93 deep dives averaged 990 m (range 420–1,330 m) in depth, and 44.4 min in duration (range 18.2–65.3 min). Water depth was at least 200 m deeper than the whale dive depth. The whale was engaged in activities at or near the surface, shallow dives, and deep dives during 22.6%, 23.4%, and 54% of the time, respectively. Depth and duration of dives were correlated, but there was little relationship between the length or depth of dives with the duration of surfacings either before or after dives. Deep dives occurred day and night. In 44.4% of the deep dives, the vertical movement of descents and ascents was interrupted at intermediate depths, lengthening these dives by an average of 10.8 min. During dives without stops at intermediate depths, descents averaged 11 min at 1.52 m/sec, and ascents averaged 11.8 min at 1.4 m/sec.     

SPERM WHALE SURFACE ACTIVITY FROM TRACKING BY RADIO AND SATELLITE TAGS1

Three 12-m sperm whales (Physeter catodon) were tagged and tracked west of Dominica in the southeast Caribbean to follow the surfacing patterns and movements of these presumed subadult males. Whale N was tagged in April 1993 with a 30-MHz radio tag and tracked for two days. Whale H was tagged in April 1995 with a 30-MHz radio tag and tracked for 4.6 d. Whale A was tagged in April 1995 with a satellite-monitored tag tracked by ARGOS for 21.5 d, the first four of which were concurrent with the tracking of Whale H, an associate. The tagged whales remained west of Dominica for at least 2, 5, and 13 d, respectively. Whales N and A then moved southward to waters off Martinique. There were no apparent effects on the whales by tagging or the presence of the tags. The whales averaged speeds of 2.6-3.5 km/h. Surfacings, indicated by tag signals, were of two types: short surfacings apparently primarily for respiration, averaging 7-10.5 min between repeated longer dives, occurring day and night; and extended surfacings seemingly for rest and social interactions with conspecifics, occurring mostly in daylight. Whales were near the surface for 20.4%–22.6% of the total time (26.6%–27.1% during the day and 14.9%–17.1% at night). Delayed blowing was observed as Whale N surfaced for 8.3 min between 47- and 45-min dives but delayed the first of its 31 blows for 1.5 min after surfacing.     

Discovery of ‘molecular switches’ within a GIRK activator scaffold that afford selective GIRK inhibitors

This letter describes a multi-dimensional SAR campaign based on a potent, efficacious and selective GIRK1/2 activator (～10-fold versus GIRK1/4 and inactive on nonGIRK 1-containing GIRKs, GIRK 2 or GIRK2/3). Further chemical optimization through an iterative parallel synthesis effort identified multiple ‘molecular switches’ that modulated the mode of pharmacology from activator to inhibitor, as well as engendering varying selectivity profiles for GIRK1/2 and GIRK1/4. Importantly, these compounds were all inactive on nonGIRK1 containing GIRK channels. However, SAR was challenging as subtle structural modifications had large effects on both mode of pharmacology and GIRK1/2 and GIRK1/4 channel selectivity.     

Mechanism of Genome Expression in a Single-stranded RNA Virus from the Cultivated Mushroom [Agaricus bisporus (Lange) Imbach]

The single-stranded RNA genome of a bacilliform virus from the common cultivated mushroom, Agaricus bisporus, was translated in an in vitro rabbit reticulocyte system. Optimal conditions for translation of mushroom bacilliform virus (MBV) RNA were 2.5 mM Mg²⁺, 70 mM K⁺, pH 7.2, and 60μg/ml RNA. Gel electrophoretic analysis showed that MBV RNA directs the synthesis of two major polypeptides of MW 77,000 and 37,000 and possibly several minor polypeptides (MW 21,000—28,000). An RNA polymerase activity could not be detected in purified virus preparations. The findings support the notion that the MBV genome functions directly as messenger for protein synthesis and further establishes the closer similarity between MBV and viruses of higher plants than mycoviruses.     

Nation-building,masculinity and entrepreneurship: memories of the “liberation of Kosovo” in Switzerland

Since the end of the Kosovo War in 1999 and the “liberation” of the territory from Serbian forces, narratives about the “freedom struggle” have been crafted and defended both in Kosovo and abroad. The transmission of these memories forms part of a broader effort to create a “national” history of Kosovo and constitute an “Albanian imagined community”. This article scrutinizes the memories of the “liberation” produced by Albanian-speaking migrants who were active on behalf of their homeland in Switzerland. It explores the construction of masculinities within narratives collected via oral history interviews. In line with the literature on “nation” and gender in Kosovo, this research acknowledges the presence of two main forms of masculinity: the “heroic fighter” and the “pacifist”. However, it also demonstrates the crystallization of the “entrepreneur”, an alternative type who integrates the transnational “neoliberal” discourses and proposes a more positive image of “Albanian men” in Switzerland.