Although white sharks (Carcharodon carcharias) are considered rare in Atlantic Canada waters, recent sighting records indicate a potentially increasing presence. We combine sighting data with satellite telemetry tracks of large juvenile/adult white sharks tagged in U.S. (n = 9) and Atlantic Canada waters (n = 17) to show seasonal white shark presence and distribution in Atlantic Canada, returns by individuals over multiple years, and high site fidelity to the region. Telemetry data indicate that white sharks are a more common and consistent occurrence in Canadian waters than previously thought, presenting two potential scenarios: 1) tagging technology is revealing white shark presence that was historically cryptic, and/or 2) a northward range expansion of white sharks in the Northwest Atlantic, potentially due to climate change, population recovery, and/or increasing pinniped prey. Given combined sighting and telemetry data indicate a current need for proactive management of white sharks in Atlantic Canada waters, we propose the basis for a management action plan, addressing conservation priorities, management goals and research incentives while considering the potential for human-shark interactions.
An overview of the faunal assemblage retrieved during preliminary excavations of the Neolithic site of Gihayu is presented. The analysis, the first of its kind carried out on a site from Yemen, reveals various similarities and differences with contemporary sites in Oman on the eastern corner of the Arabian Sea. In this site, a heavy reliance on marine resources is noted that testifies both to the collecting of shellfish as well as the fishing of large pelagics in the open sea. The differences relate to the cropping of molluscs along an open shore rather than in lagoons or mangroves as appeared to be the case in Oman. The differences may also reflect phenomena not so straightforwardly related to the availability of certain biotopes. Among these an apparent dominance ofcarangids (jacks) over scombrids (tunas) could be taken to indicate a less seasonally focused fisheiy, a hvpothesis that will require verification in the future.
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