Summer Movements of Radio-tagged Arctic Charr (Salvelinus alpinus) in Lake Hazen, Nunavut, Canada

Radiotelemetry was used to determine whether Lake Hazen arctic charr (Salvelinus alpinus) were anadromous and to determine movements of the charr within the lake. In 1995 and 1996, 62 and 55 charr, respectively, were captured, radio-tagged, and released back into the lake. A fixed data acquisition system recorded limited movements of radio-tagged charr in the upper reaches of the Ruggles River, the only outlet from the lake to the sea, in 1995. When movements of radio-tagged charr within Lake Hazen were monitored opportunistically in 1995, most of the relocated charr were found in warmer, more productive waters associated with inflowing streams. No movements of radio-tagged charr in the Ruggles River were recorded in 1996 when the data acquisition system was operated in the lower reaches of the river. These observations supported the conclusions of a study of Lake Hazen charr otolith strontium distribution that Lake Hazen charr were non-anadromous. The Ruggles River may be a detriment to anadromous behaviour because of its length (ca. 29 km), velocity (up to 2.25 m/s), and the year-round presence of aufeis (layered ice buildup). In summer, instead of migrating to the sea to feed, Lake Hazen charr appear to move to feed on abundant prey found in areas where inlet streams enter the lake.On a fait appel à la télémesure pour savoir si l'omble chevalier (Salvelinus alpinus) du lac de Hazen est anadrome et pour connaître ses déplacements dans le lac. On a capturé 62 ombles en 1995 et 55 en 1996 qu'on a munis de radio-émetteurs avant de les relâcher dans le lac. En 1995, un système fixe de collecte de données a enregistré les déplacements restreints des ombles munis de radio-émetteurs dans le cours supérieur de la rivière Ruggles, la seule décharge du lac dans la mer. Quand on a pu vérifier les déplacements de ces ombles dans le lac de Hazen en 1995, la plupart des poissons se trouvaient dans les eaux plus chaudes et plus productives associées à des ruisseaux d'arrivée. En 1996, après qu'un système de collecte de données a été installé dans le cours inférieur de la rivière Ruggles, on n'y a enregistré aucun déplacement des ombles munis de radio-émetteurs. Ces observations viennent étayer une étude sur la distribution du strontium otolithique chez l'omble du lac de Hazen, qui concluait que ce poisson n'était pas anadrome. Il se peut que la rivière Ruggles soit peu propice à un comportement anadrome en raison de sa longueur (env. 29 km), de sa vitesse (jusqu'à 2,25 m/s) et de la présence toute l'année d'un dôme de glace (Aufeishugel). En été, au lieu de migrer vers la mer pour se nourrir, l'omble du lac de Hazen semble se déplacer vers les zones où les ruisseaux se déversent dans le lac et qui contiennent des proies en abondance

The RHIC SPIN Program: Achievements and Future Opportunities

Time and again, spin has been a key element in the exploration of fundamental physics. Spin-dependent observables have often revealed deficits in the assumed theoretical framework and have led to novel developments and concepts. Spin is exploited in many parity-violating experiments searching for physics beyond the Standard Model or studying the nature of nucleon-nucleon forces. The RHIC spin program plays a special role in this grand scheme: it uses spin to study how a complex many-body system such as the proton arises from the dynamics of QCD. Many exciting results from RHIC spin have emerged to date, most of them from RHIC running after the 2007 Long Range Plan. In this document we present highlights from the RHIC program to date and lay out the roadmap for the significant advances that are possible with future RHIC running

Development and validation of the Attachment Relationship Inventory—Caregiver Perception 2–5 years (ARI-CP 2–5): Psychometric structure, external validity, and norms

There is a lack of instruments assessing child–caregiver attachment relationships in early childhood to be used in attachment‐based practice, in particular from a caregiver's perception, which is an important factor of clinical importance to take into account in parenting interventions targeting young children. Therefore, the 48‐item Attachment Relationship Inventory—Caregiver Perception 2–5 years (ARI‐CP 2–5) was developed. Survey data of 446 caregivers of 2‐ to 5‐year‐old children were collected, and a subsample of 83 caregivers participated in an observation study. Confirmatory factor analysis confirmed a four‐factor structure of secure, avoidant, ambivalent, and disorganized attachment relationship. Indications of configural, metric, and scalar invariance were found for caregivers’ and children's sex, children's age, and population (clinical vs. general population). The four scales showed sufficient internal consistency and significant associations with children's psychopathology, caregivers’ general attachment representations, caregivers’ mind‐mindedness, and population type. Moreover, preliminary evidence for convergent validity with observational attachment measures was found. It is concluded that the ARI‐CP 2–5 is a valid instrument that can be used as part of the screening and assessment of insecure attachment relationships

Development and validation of the Attachment Relationship Inventory—Caregiver Perception 2–5 years (ARI-CP 2–5): Psychometric structure, external validity, and norms

There is a lack of instruments assessing child–caregiver attachment relationships in early childhood to be used in attachment‐based practice, in particular from a caregiver's perception, which is an important factor of clinical importance to take into account in parenting interventions targeting young children. Therefore, the 48‐item Attachment Relationship Inventory—Caregiver Perception 2–5 years (ARI‐CP 2–5) was developed. Survey data of 446 caregivers of 2‐ to 5‐year‐old children were collected, and a subsample of 83 caregivers participated in an observation study. Confirmatory factor analysis confirmed a four‐factor structure of secure, avoidant, ambivalent, and disorganized attachment relationship. Indications of configural, metric, and scalar invariance were found for caregivers’ and children's sex, children's age, and population (clinical vs. general population). The four scales showed sufficient internal consistency and significant associations with children's psychopathology, caregivers’ general attachment representations, caregivers’ mind‐mindedness, and population type. Moreover, preliminary evidence for convergent validity with observational attachment measures was found. It is concluded that the ARI‐CP 2–5 is a valid instrument that can be used as part of the screening and assessment of insecure attachment relationships

The RHIC SPIN Program: Achievements and Future Opportunities

Time and again, spin has been a key element in the exploration of fundamental physics. Spin-dependent observables have often revealed deficits in the assumed theoretical framework and have led to novel developments and concepts. Spin is exploited in many parity-violating experiments searching for physics beyond the Standard Model or studying the nature of nucleon-nucleon forces. The RHIC spin program plays a special role in this grand scheme: it uses spin to study how a complex many-body system such as the proton arises from the dynamics of QCD. Many exciting results from RHIC spin have emerged to date, most of them from RHIC running after the 2007 Long Range Plan. In this document we present highlights from the RHIC program to date and lay out the roadmap for the significant advances that are possible with future RHIC running