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Challenges in Tracking Marine Vertebrate Migrations
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Challenges in Tracking Marine Vertebrate Migrations

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Questions and Answers

What is the major priority in reducing susceptibility of sharks to fisheries?

Reducing susceptibility to fisheries as bycatch

Why were basking sharks listed as Endangered by the IUCN in the north-east Atlantic?

Due to marked declines in local populations from heavy exploitation

In which body of water are basking sharks caught annually in the bottom gill-net fishery?

Celtic Sea

Which international treaty lists basking sharks and requires monitoring of international trade?

<p>Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES)</p> Signup and view all the answers

What type of vertical movement do basking sharks exhibit when in deep stratified waters of the continental shelf-edge?

<p>Normal diel vertical migration (DVM; dusk ascent-dawn descent)</p> Signup and view all the answers

How do basking sharks behave when in shallow, inner-shelf waters?

<p>Reverse diel vertical migration (rDVM; dusk descent-dawn ascent)</p> Signup and view all the answers

What are some challenges in describing seasonal and migratory movements in large marine vertebrates?

<p>Challenges include complexities of tracking individuals in water for sufficient time.</p> Signup and view all the answers

How have advances in satellite tracking technologies and attachment techniques improved our understanding of marine vertebrate movements?

<p>Advances allow for observations of movements and space use over extended timescales.</p> Signup and view all the answers

What can knowledge of vertical movements in marine vertebrates provide insight into?

<p>Insight into how animals use their environment.</p> Signup and view all the answers

How do some environmental parameters like light, pressure, and temperature vary with depth in the ocean?

<p>They vary with depth and can partition species ranges.</p> Signup and view all the answers

How can animal movements between habitats impact trophic dynamics?

<p>They can affect nutrient transport between depth zones.</p> Signup and view all the answers

What are some examples of extraordinary behaviors observed in marine vertebrates using advanced tracking technologies?

<p>Behaviors include ocean basin migrations and dives to depths greater than 2500 m.</p> Signup and view all the answers

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