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The Six-Gill Hagfish (Epaulette hexaeterna) is an opportunistic scavenger that tears 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 (Epaulette hexaeterna) is an opportunistic scavenger that tears 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 (Epaulette hexaeterna) is an opportunistic scavenger that tears 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 has developed several adaptations to protect itself from predators while it feeds. Primarily, it secretes large amounts of slime through specialized slime glands. This slime can obstruct the gills of predators, making it difficult for them to breathe and effectively deterring them from an attack. Additionally, the hagfish can tie its body into a knot, allowing it to scrape away flesh from carcasses while keeping its vital organs safe from would-be predators.
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
One characteristic of the Sea Bass (Dicentrarchus labrax) that would increase the likelihood of it being caught on hooks is its keen sense of smell. This allows it to detect bait from long distances. Additionally, the Sea Bass has a streamlined body shape, which enables it to swim quickly toward the bait, making it more susceptible to being caught. In contrast, the Hagfish's lack of traditional fins and relatively slow movement reduces its chances of being caught.
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 unique structural characteristic: a flexible, soft body that allows it to squirm and escape easily from hooks and other entanglements. Moreover, its lack of hard body parts means that it can easily maneuver itself to avoid being snagged on fishing gear.