Estimation of short-term centers of activity from an array of omnidirectional hydrophones and its use in studying animal movements
Citations Over TimeTop 10% of 2002 papers
Abstract
A method for studying animal movements based on data from independent data-logging acoustic receivers is described. The method takes presence or absence data from multiple receivers arranged in an array and converts them to position estimates based on weighted means of the number of signal receptions at each receiver during a specified time period. The method is equivalent to a short-term center of activity rather than a precise estimate of location at a single time. The utility of the method was assessed using data from a study of neonate blacktip sharks (Carcharhinus limbatus). Periods between 5 and 60 min were tested to find the most appropriate interval for estimating positions. The results from the method agreed closely with a simulated shark track and data from actively tracked sharks. The median distances between successive locations from the mean-position algorithm were between 28% and 42% of those from active tracking because of the center-of-activity nature of the method. The results presented demonstrate that the technique provides a useful method for investigating long-term movement patterns, space utilization patterns over broader areas, and home range.
Related Papers
- → Revised Estimates of Age and Growth of the Sandbar Shark (Carcharhinus plumbeus) from the Western North Atlantic(1992)75 cited
- → Aversive responses of captive sandbar sharks Carcharhinus plumbeus to strong magnetic fields(2016)10 cited
- → First record of the sandbar shark, Carcharhinus plumbeus, (Chondrichthyes: Carcharhiniformes: Carcharhinidae) from Indian waters(2015)5 cited
- → Inter-oceanic divergence and speciation in Carcharhinus plumbeus, Carcharhinus limbatus and Carcharhinus falciformis inferred from mitochondrial DNA sequence(2003)1 cited
- → Confirmation of the occurrence of the sandbar shark Carcharhinus plumbeus (Nardo, 1827) at Norfolk Island, Tasman Sea(2016)