Feeding Flashcards

1
Q

Smal particle feeding

A

Filter OM suspended in water.
Deposit, living and non-living OM. Mucociliary process

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2
Q

Suspension feeding

A

V efficient, feed on plankton
Choanocytes, direct cellular ingestion.
Mucociliary.
Setae/cirri, collect food, appendages.
Baleen.
Basking sharks, gill rakes

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3
Q

herbivore feeding tactics

A

Radula
Aristotles lantern

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4
Q

Predators

A

Hunting
Specialised radula
nematocysts

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5
Q

Fluid feeding

A

Suck juices, direct uptake of DOM
Sugars from symbionts

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6
Q

Intracellular digestion

A

Cavity, has openings at both ends. Mouth and anus
Enzymes in cavity break down food, absorbed into cells lining the cavity

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7
Q

Extracellular digestion

A

alimentary canal
Ingested through mouth, through oesophagus and stored in the crop.

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8
Q

Gut structure

A

Fore gut, ectodermal, ingestion and mechanical breakdown of food.
Mid, endodermal, diverticula, nutrient absorption.
Hind, Ectodermal, anus waste

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9
Q

Fore gut structure

A

Buccal cavity, salvia lubricates food and enzymes start digestive process.
Pharynx pumps food to gut, aid breakdown and mixing.
Oesophagus moves food from stomach to crop. Crop seen in organisms which have large infrequent meals.

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10
Q

mid gut structure

A

Muscular stomach.
Secretory/absorptive caeca, digestive enzymes, absorb food.
Intestine, intracellular digestion in low vertebrates.
Extra digestion in processing large masses of food

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11
Q

hind gut structure

A

Selective reabsorption of water and salt.
Elasmobranchs are ion regulating organs.
Faecal pellet formation

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12
Q

Meal processing

A

Batch, one meal after another.
Continuous without mixing, line up
Continuous with mixing

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13
Q

Loss of through gut

A

Lost gene for proton pump and pepsinogens.
Suspension feeders znd molluscs food to gut by cord of mucus.
Acids release food, alkaline to form faecal pellets.
Chordates, mucus to gut by cilia

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14
Q

Bivalves digestion

A

2 phase, rapid intake and slow glandular.
Avoid excess build up of metals.
Decrease ingestion under Cr.
Decrease proportion by glandular under increased Cr.
Modify processing to reduce Cr exposure

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15
Q

Role of microbes in fish

A

Microbes can breakdown algae.
When fish is feeding microbes produce enzymes.
partitions of microbial communities by anatomy in bowhead whales

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16
Q

Gribble

A

Eats wood, has a sterile digestive system.
hemocyanins modify lignin in the wood.