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The Six-Gill Hagfish (Epatretus hexatrema) is an opportunistic scavenger that tears its body into a knot to forcefully remove chunks of flesh from large carcasses - NSC Marine Sciences - Question 3 - 2023 - Paper 2
Question 3
The Six-Gill Hagfish (Epatretus hexatrema) is an opportunistic scavenger that tears its body into a knot to forcefully remove chunks of flesh from large carcasses. T... show full transcript
Worked Solution & Example Answer:The Six-Gill Hagfish (Epatretus hexatrema) is an opportunistic scavenger that tears its body into a knot to forcefully remove chunks of flesh from large 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 secretes large amounts of slime through slime glands. This slime can block the gills of predators, making it unpalatable and difficult for them to grip the hagfish. This mechanism not only deters potential threats during feeding but also provides a way for the hagfish to escape from 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
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Lack of Hard Structures: The Six-Gill Hagfish has a soft-bodied structure without significant bony elements that could help it avoid hooks. This increases the likelihood of being caught since hooks could easily penetrate its flesh.
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Scavenging Behavior: Hagfish are scavengers and often feed on carrion at the ocean floor. This behavior may lead them to be more likely to encounter baited hooks, as they are searching for food in areas where fishing occurs.
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 possesses a unique ability to tie itself into knots when threatened. This behavior allows it to escape predator grasp or disengage from hooks. The flexibility of its body can help it maneuver away from a hook that might catch on its skin.