The rate of telomere loss is related to maximum lifespan in birds.

Telomeres are highly conserved regions of DNA that protect the ends of linear chromosomes. The loss of telomeres can signal an irreversible change to a cell's state, including cellular senescence. Senescent cells no longer divide and can damage nearby healthy cells, thus potentially placing them at the crossroads of cancer and ageing. While the epidemiology, cellular and molecular biology of telomeres are well studied, a newer field exploring telomere biology in the context of ecology and evolution is just emerging. With work to date focusing on how telomere shortening relates to individual mortality, less is known about how telomeres relate to ageing rates across species. Here, we investigated telomere length in cross-sectional samples from 19 bird species to determine how rates of telomere loss relate to interspecific variation in maximum lifespan. We found that bird species with longer lifespans lose fewer telomeric repeats each year compared with species with shorter lifespans. In addition, phylogenetic analysis revealed that the rate of telomere loss is evolutionarily conserved within bird families. This suggests that the physiological causes of telomere shortening, or the ability to maintain telomeres, are features that may be responsible for, or co-evolved with, different lifespans observed across species.This article is part of the theme issue 'Understanding diversity in telomere dynamics'.

Training substance abuse clinicians in motivational interviewing using live supervision via teleconferencing.

OBJECTIVE: Training through traditional workshops is relatively ineffective for changing counseling practices. Teleconferencing supervision (TCS) was developed to provide remote, live supervision for training motivational interviewing (MI). METHOD: Ninety-seven drug treatment counselors completed a 2-day MI workshop and were randomized to live supervision via teleconferencing (TCS; n = 32), standard tape-based supervision (tape; n = 32), or workshop alone (workshop; n = 33). Supervision conditions received 5 weekly supervision sessions at their sites using actors as standard patients. Sessions with clients were rated for MI skill with the Motivational Interviewing Treatment Integrity (MITI) Coding System pre-workshop and 1, 8, and 20 weeks post-workshop. Mixed-effects linear models were used to test training condition on MI skill at 8 and 20 weeks. RESULTS: TCS scored better than workshop on the MITI for spirit (mean difference = 0.76; p < .0001; d = 1.01) and empathy (mean difference = 0.68; p < .001; d = 0.74). TCS was superior to workshop in reducing MI non-adherence and was superior to workshop and tape in increasing reflection to question ratio. Tape was superior to TCS in increasing complex reflections. Percentage of counselors meeting proficiency differed significantly between training conditions for the most stringent threshold (spirit and empathy scores ≥ 6). CONCLUSIONS: TCS shows promise for promoting new counseling behaviors following participation in workshop training. However, further work is needed to improve supervision methods to bring more clinicians to high levels of proficiency and facilitate dissemination of evidence-based practices.

Providing live supervision via teleconferencing improves acquisition of motivational interviewing skills after workshop attendance.

Teleconferencing Supervision is a method for training community-based substance abuse clinicians in Motivational Interviewing (MI). Following a 2-day workshop, 13 clinicians received live supervision via telephone during 5 counseling sessions conducted at their community treatment facilities. Clinicians were assessed for skill level at post-workshop, at post-training, and 3 months later; learning was assessed using the MI Treatment Integrity instrument. All summary scores and therapist behavior frequency counts improved by post-training or by the 3 month follow-up, although some gains were not statistically significant. Teleconferencing Supervision may help facilitate the proficient use of MI community clinicians following workshop instruction.