We carried out a short survey for gibbons in the Bach Ma National Park (Thua Thien Hue Province) of central Vietnam. During eight survey days, eight different groups (including solitary males) were heard. All gibbons appeared to live in lowland evergreen forest at altitudes between 400 and 800 m, although the park area also includes forest areas at higher altitudes. Most gibbon songs (53%) star...

Capture-mark-recapture (CMR) approaches are the backbone of many studies in population ecology to gain insight on the life cycle, migration, habitat use, and demography of target species. The reliable and repeatable recognition of an individual throughout its lifetime is the basic requirement of a CMR study. Although invasive techniques are available to mark individuals permanently, noninvasive...

—Double-crested Cormorant ( Phalacrocorax auritus ) numbers are increasing throughout eastern North America. We compared variation for five portions of mtDNA to determine if genetic differences existed among portions of the breeding range that would need to be considered when formulating management programs. Sequences for four mtDNA regions were identical across sample locations; frequencies of...

Weirs, as overflow structures, are extensively used for the measurement of flow, its diversion and control in the open canals. Labyrinth weir due to more effective length than conventional weirs, allows passing more discharge in narrow canals. Determination the design criteria for the practical application of these weirs need more investigation. Weir angle and its position relative to the flow ...

Planktivorous auklets registered changes across two years of a marine heat wave (2015–2016). Colony attendance crested (Aethia cristatella) was reduced (35–50%) at Little Diomede I., AK, in the latter part June 2016 compared to 2015. The pattern similar for least (A. pusilla). An anomalous distribution and consumption were noted auklets. A plot δ15N/δ13C spanned three times range vs. Crested au...