The current study adds to growing evidence that M.
However, all these individuals were subsequently detected in the Bay, suggesting a strong degree of site fidelity at this location. Despite the high residency suggested by acoustic telemetry, satellite tag data and offshore acoustic detections in Sanganeb Atoll and Suedi Pass recorded individuals moving up to 125 km from the Bay. Modeled biological factors, including sex and wingspan, had no influence on animal presence.
Giant oceanic manta ray naval action full#
alfredi presence was highly correlated with increasing chlorophyll-a levels and weakly correlated with the full moon. Detections were recorded throughout the year, though some individuals were absent from the receiver array for weeks or months at a time, and generalized additive mixed models showed a clear seasonal pattern in presence with the highest probabilities of detection occurring in boreal fall. Tagged individuals were detected within the array on 96% of monitored days and recorded an average residence index of 0.39 across all receivers. alfredi were also equipped with satellite linked archival tags and one individual was fitted with a satellite transmitting tag. Together, these data are used to describe approximately two years of residency and seasonal shifts in habitat use. alfredi aggregation in the Red Sea.Ī total of 19 individuals were tagged using surgically implanted acoustic tags and tracked within DMNP on an array of 15 strategically placed acoustic receivers in addition to two offshore receivers. Dungonab Bay and Mukkawar Island National Park (DMNP), a component of a UNESCO World Heritage Site in Sudan, hosts the largest known M. Identifying critical habitats for this species is essential for future research and conservation efforts. Reef manta ray ( Mobula alfredi) populations along the Northeastern African coastline are poorly studied.
0 kommentar(er)
