The magnitude of the earthquakes ranged between 3.4 and 4.5 on the Richter scale.The Commission says CNRL immediately suspended hydraulic fracturing operations as per the Commission’s Kiskatinaw Seismic Monitoring and Mitigation Area Special Project Order and, the Drilling and Production Regulation.The Commission also states that CNRL’s operations may not continue without thewritten consent of the Commission. The Commission says they are requesting a 30-day halt to fracking in the area close to the source of the earthquake.“Companies operating within that area have confirmed that there will be no hydraulic fracturing activities for the next 30 days within the specified area. This will provide the Commission with sufficient time to conduct a thorough investigation. Companies will need to confirm with the Commission before operations within the specific area resume.”The Commission will continue to monitor the area for further earthquake activity. CORRECTION – An earlier version of the article headline suggested the cause of last weeks earthquake had been determined. This headline was incorrect. The cause is still under investigation. We apologize for this mistake.FORT ST. JOHN, B.C. – The B.C. Oil & Gas Commission has narrowed down the source of the earthquake that occurred southeast of Fort St. John on November 29, 2018.The Commission conducted a study and found that the cause of the earthquake may be linked to hydraulic fracturing operations being conducted by Canadian Natural Resources Ltd. in the Septimus field of the Montney formation, southeast of Fort St. John (see map).
The devil is in the detail: small-scale sexual segregation despite large-scale spatial overlap in the wandering albatross
Sexual segregation in foraging habitat occurs in many marine predators and is usually attributed to competitive exclusion, different parental roles of each sex or niche specialisation associated with sexual size dimorphism. However, relatively few studies have attempted to understand the patterns and underlying drivers of local-scale sexual segregation in marine predators. We studied habitat use, diet and feeding ecology of female and male wandering albatrosses Diomedea exulans, fitted with GPS and stomach-temperature loggers during the chick-rearing period (austral winter) at South Georgia in 2009. During this period, when oceanographic conditions were anomalous and prey availability was low in waters near the breeding colony, the tracked wandering albatrosses showed high consistency in their foraging areas at a large spatial scale, and both males and females targeted sub-Antarctic and subtropical waters. Despite consistency in large-scale habitat use, males and females showed different foraging behaviours in response to oceanographic conditions at a smaller scale. Males appeared to be more opportunistic, scavenging for offal or non-target fish discarded by fishing vessels in less productive, oceanic waters. They exhibited sinuous movements, feeding mostly on large prey and consuming similar amounts of food during the outbound and return parts of the foraging trip. In contrast, females targeted natural productivity hotspots, and fed on a wide variety of fish and cephalopods. They commuted directly to these areas; most prey were ingested on the outbound part of the trip, and they often started their return after ingesting large prey at the farthest point from the colony. Together, these results indicate that sexual segregation in core foraging areas of wandering albatrosses is driven by sex-specific habitat selection due to the low availability of prey in local Antarctic waters. This segregation results in different feeding behaviour at local scales which may be explained by differing breeding roles and degree of parental investment by each sex, with females investing more than males in reproduction. Further investigations are necessary to confirm the existence of this pattern through time under contrasting environmental conditions and to identify the drivers responsible for local-scale sexual segregation in wandering albatrosses.