An ethnography of deletion: Materializing transience in Solomon Islands digital cultures

This article demonstrates the fragility of digital storage through a non-media-centric ethnography of data management practices in the so-called Global South. It shows how in the Lau Lagoon, Malaita Province, Solomon Islands, the capacity to reliably store digital media is curtailed by limited access to means of capital production and civic infrastructures, as well as a comparatively isolated tropical ecology that bedevils the permanence of all things. The object biography of mobile phones, including MicroSD cards, typically short, fits into a broader historical pattern of everyday engagements with materializations of transience in the Lau Lagoon. Three types of visual media are exemplary in this regard: sand, ancestral material cultures and digital visual media (photographs and videos). Ultimately, Lau experiences of transience in their visual media are located in their visual technological history and the choices they make about which materials to maintain or dispose of.

Detecting tropical wildlife declines through camera-trap monitoring: an evaluation of the Tropical Ecology Assessment and Monitoring protocol

Identifying optimal sampling designs for detecting population-level declines is critical for optimizing expenditures by research and monitoring programmes. The Tropical Ecology Assessment and Monitoring (TEAM) network is the most extensive tropical camera-trap monitoring programme, but the effectiveness of its sampling protocol has not been rigorously assessed. Here, we assess the power and sensitivity of the programme's camera-trap monitoring protocol for detecting occupancy changes in unmarked populations using the freely available application PowerSensor!. We found that the protocol is well suited to detect moderate (≥ 5%) population changes within 3–4 years for relatively common species that have medium to high detection probabilities (i.e. p > 0.2). The TEAM protocol cannot, however, detect typical changes in rare and evasive species, a category into which many tropical species and many species of conservation concern fall. Additional research is needed to build occupancy models for detecting change in rare and elusive species when individuals are unmarked.

Dispatch from the field II: the mystery of the red and blue Opadometa male (Araneae, Tetragnathidae, Opadometa sarawakensis)

Males of Opadometa are difficult to associate with conspecific females, and sex-matching errors may persist in the taxonomic literature. Recommended best practices for definitive sex matching in this genus suggest finding a male in the web of a female, or better yet, mating pairs. A male Opadometa was observed hanging on a frame line of the web of a female Opadometasarawakensis, a species for which the male was previously undescribed. This occurred during a tropical ecology field course held at the Danau Girang Field Centre in Sabah, Malaysia. A taxonomic description was completed as a course activity.