Table 1.

Sighting histories and tag type for dolphins (n = 32) evaluated during August 2011 health evaluations in Barataria Bay, LA. The presence (1 or 2) or absence (0) of each animal was recorded for every month a survey was conducted. Outlined cells represent survey months in which satellite-linked data were received for animals with functioning tags. Bold numbers represent the final sighting of each individual. Odd/even field IDs represent females/males, respectively. Bold field IDs represent females that were pregnant at time of capture, as determined by ultrasonography. A number 2 indicates that the female was sighted with a calf. Month of estimated due date is shaded in grey. Sightings of mother/calf pairs following the due date were considered reproductive successes. Detection probability was estimated from the top CJS model φ_., p_t. indicates the probability that the dolphin would be undetected for the number of contiguous occasions shown. n.a., not applicable. Tag types: S, satellite-linked; V, very high frequency (VHF); B, both VHF and satellite-linked.

^aActual survival time based on carcass retrieval (31 Jan 2012).

^bY35 disappeared prior to her due date and presumably died along with her calf.

^cY01 was observed pushing a dead neonate in March 2013, 10 months after the expected due date (May 2012) of her 2011 pregnancy resulting in her second reproductive loss in 17 months.

^dUltrasonography of Y31 revealed the presence of a non-viable fetus; therefore, no due date is provided.