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The Six-Gill Hagfish (Eptatretus hexatrema) is an opportunistic scavenger that turns its body into a knot to forcefully remove chunks of flesh from larger carcasses - NSC Marine Sciences - Question 3 - 2023 - Paper 2
Question 3
The Six-Gill Hagfish (Eptatretus hexatrema) is an opportunistic scavenger that turns its body into a knot to forcefully remove chunks of flesh from larger carcasses.... show full transcript
Worked Solution & Example Answer:The Six-Gill Hagfish (Eptatretus hexatrema) is an opportunistic scavenger that turns its body into a knot to forcefully remove chunks of flesh from larger carcasses - NSC Marine Sciences - Question 3 - 2023 - Paper 2
Step 1
3.1.1 Explain how the Six-Gill Hagfish is able to protect itself from other predators when feeding.
Answer
The Six-Gill Hagfish is able to protect itself from predators by secreting large amounts of slime through its slime glands. This slime can fill the gills of other predators, effectively blocking their ability to breathe. Additionally, the hagfish can knot its body to remove flesh more efficiently, which allows the hagfish to feed while minimizing exposure to predators, making it unappealing and difficult to grip.
Step 2
3.1.2(a) Discuss TWO characteristics of ONE of the species above that, in your opinion, would increase the likelihood of that species being caught using hooks.
Answer
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Bait detection: The Sea Bass has an excellent sense of smell, allowing it to detect bait from a distance. This characteristics increase the likelihood of being caught on hooks as it can easily find and consume baited hooks.
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Attraction to larger prey: The Six-Gill Hagfish uses its body to knot and consume larger chunks of flesh, which makes it more likely to be caught by hooks, especially when they are baited with bigger prey items.
Step 3
3.1.2(b) For the species chosen in QUESTION 3.1.2(a), explain ONE structural characteristic that might reduce the chances of being caught on hooks.
Answer
The Six-Gill Hagfish has a muscular body that provides flexibility, allowing it to maneuver quickly in its environment. This agility can help it evade hooks and reduce the chances of being captured, as it can easily escape when it encounters a baited hook.