Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 6 of 6 for “"Haul-out"”.
-
Meteorological and geomorphological influence on harbor seal haul-out distribution behavior using drone imagery
… and meteorological conditions affect seal haul-out site use. Using drone surveys, high-resolution elevation models and slope maps were produced for major haul-out sites. Drone surveys from 2021 to 2023 provided seal counts during key life history stages—pupping and molting—with seal …
-
Considering behaviour in genetic sampling – a case study with grey seals
… swabs showed potential for being able to carry out individual genotype analysis to identify polymorphisms; a SNP in the grey seal DRD4 gene not previously reported in any other studies was found. However, some inconsistent results from PCR amplification and Sanger sequencing suggest that further …
-
Vocal communications among Harbor Seals (Phoca vitulina) on land
… the different vocalization types being used in haul outs by harbor seals in Iceland and how vocalization parameters and rates may be influenced by the surroundings using data collected in the summer of 2022. Six vocalization types were determined across the three biological periods (pupping, …
-
The relationship between two species of fur seals Arctocephalus Tropicalis (Gray) and A. Gazella (Peters) on Marion Island
… and 300-400 A. gazella). Although the seasonal haul-out patterns and breeding habitat preferences of these two species do differ, these differences do not appear to be sufficient to prevent hybridization. Differences 1n suckling periods and pup growth rates may be acting to limit hybridization …
-
Disentangling entanglement in Cape fur seals for better management of plastic pollution impacts
… targeting harbour employees and fishermen about the adverse impacts of marine litter, and implementing guidelines on appropriate waste disposal in the harbour. Putting up signage where seals commonly haul out highlighting the entanglement problem may also improve waste disposal habits. The …
-
Harbor Seal (Phoca vitulina) Reproductive Advertisement Behavior And The Effects Of Vessel Noise
… of the hydrophone, as it was not near the haul out and depth was therefore not significantly influenced by changes in tidal height. I also investigated the source levels and call parameters of vocalizations, as well as call rate and territoriality. The average source level of harbor seal …