Difference between revisions of "AY Honors/Crustaceans/Answer Key/pt-br"

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< AY Honors‎ | CrustaceansAY Honors/Crustaceans/Answer Key/pt-br
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Perhaps the most striking relationship is between the Blue Whale and the crustacean Krill, one of its primary food sources. Blue whales can eat between two and four tons of krill a day, and by some accounts can, in particularly rich waters, gulp an astonishing thousand pounds of krill in a single mouthful.
 
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You should be able to acquire shrimp from a local grocery store or fish market. A basic dissection kit is ideal, but you can also use small hobby knives or a razor blade, small scissors, tweezers and toothpicks or bamboo skewers for dissection. Begin with a review of the external anatomy, and the way the various parts cooperate to provide different types of locomotion, protection and feeding for the shrimp. Then you can remove the carapace to see the stomach and heart (in previously frozen shrimp, which are common in the grocery, these organs may be damaged, but are still generally identifiable). Cutting through the shrimp abdomen will allow you to see the gut and the nerves, as well as note the extensive amount of muscle in a shrimp. If you are careful and interested, you can slowly remove the various mouth parts. Shrimp, like many of their cousin Malacostraca, have very complex mouths, with different modified limbs serving to move the food ultimately to the crushing mandibles.
 
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The fist shrimp below has the carapace removed and the gills exposed. The color is due either to black gill disease or to the shrimp living in very fouled water. The second image is a different shrimp with the carapace removed. Note that the internal organs are heavily damaged, due to freezing and thawing, making clear identification more difficult. This is something you may encounter as well with store bought shrimp.
 
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You may also want to dissect a crab, if they are easily available in your local grocery or fish market. (Two fairly comprehensive dissection guide to Blue Crabs can be found at [http://lanwebs.lander.edu/faculty/rsfox/invertebrates/callinectes.html] and [http://home.earthlink.net/~wweinkle/Crablab.htm]) Crab internal organs are a bit more robust than those of shrimp, as well as larger, making identification and exploration that much easier. The external anatomy key: 1. Cheliped (modified Pereopod) 2. Second Pereopod 3. Third Pereopod 4. Fourth Pereopod 5. Fifth Pereopod, modified as a swimmerette 6. The Cervical Groove on the Carapace 7. Lateral Spine 8. Propodus (the immovable portion of the Chela (claw) 9. Dactyl (the moveable "finger" of the Chela) 10. The Compound Eyes on eye stalks.
 
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With the carapace removed carefully, you will first be able to see the crab's skin, covering the internal compartment. Once lifted, it reveals the internal organs. The mustard colored organ in the upper left is the hepatopancreas, which has been lifted somewhat to reveal the other organs. The bright orange organ is the ovary. On the left side, the gills are exposed. At the anterior end (near the top of the picture) the odd looking white structure in the center of the crab is the stomach. The final picture shows the thin membrane that covers the gills, keeping them separate from the rest of the internal body cavity.
 
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The vertical image below shows the inhalent aperture, the hole behind the claw leading to the gill chamber, where water enters the gill chamber. The second image in this row is the crab (upside down on the board), showing various layers of mouth parts.
 
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There are many places to find different crustaceans to observe, and the requirement doesn't say your class has to stay in - you may be able to take a field trip to observe many of these different types of crustaceans. A local seafood market should have different live crabs or shrimp species. You can usually find terrestrial isopods (rolly polly bugs/pillbugs) in your back yard. Sea Monkeys are small crustaceans known as brine shrimp, and are often available in hobby, science or toy stores. Triops are another type of crustacean often available as dormant eggs for growing and observing at home. Many pet stores sell terrestrial hermit crabs, and the aquarium departments often have fiddler crabs and different types of shrimp. If you live near the seashore, take your class outside, and see what you can find right on the beach. If they look carefully, they may find different types of crabs, small shrimp, hermit crabs, and amphipods and isopods. While you are out on the beach, consider working on the [[Adventist Youth Honors Answer Book/Nature/Marine Invertebrates|Marine Invertebrates]] Honor or the [[Adventist Youth Honors Answer Book/Nature/Shells|Shells]] Honor as well.
 
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Revision as of 18:56, 22 June 2021

Other languages:
English • ‎español • ‎português do Brasil
Crustáceos

Nível de Habilidade

2

Ano

2012

Version

26.11.2024

Autoridade de Aprovação

Divisão Sul Americana

Crustaceans AY Honor.png
Crustáceos
Estudos da natureza
Nível de Habilidade
123
Autoridade de Aprovação
Divisão Sul Americana
Ano de Introdução
2012


1

Citar, pelo menos, 4 características de um crustáceo.


2

O que é um exoesqueleto?


3

A qual Filo pertence este grupo?


4

Como é dividido o corpo destes animais?


5

Em qual livro da Bíblia, capítulo e versículo encontramos informações para não nos alimentarmos de crustáceos?


6

Como podemos diferenciar um siri de um caranguejo? Em quais ambientes encontramos esses animais?


7

Citar um exemplo de crustáceo terrestre.

Ghost Crabs (Ocypode sp.) and Blue Land Crabs (Cardisoma guanhumi) are common land crabs along the U.S. south and east coasts. Most types of Fiddler Crabs (the male frequently has one claw much larger than the other) are also considered land or terrestrial crabs.


8

Como podemos diferenciar entre siris (ou caranguejos) machos e fêmeas? Por que isso é importante?

BlueCrab 0553 W.jpg Crab 3396 W.jpg


9

Qual a importância dos microcrustáceos para o ambiente?


10

Realizar 2 dos itens a seguir, apresentado relatório ilustrado:


10a

Dissecar um camarão e indicar suas principais partes.


Crangon crangon.png ShrimpAnatomy 0480 edited-W.jpg ShrimpHead 0502 W.jpg

Shrimp 0491.jpg Shrimp 0645.jpg ShrimpMidgut 0505 W.jpg ShrimpReproductive 0507 P.jpg

BlueCrab 0540 W.jpg BlueCrab 0547 W.jpg BlueCrab 0609.jpg

BlueCrab 0618.jpg BlueCrab 0619.jpg BlueCrab 0647.jpg

BlueCrab 0655.jpg CrabMouth 0664 W.jpg


10b

Em aula prática observar, ao vivo ou fixado, diversos tipos de crustáceos. Esquematizar, pelo menos, 2 deles.




11

Ser capaz de identificar, pessoalmente ou através de imagens, os seguintes animais:


11a

Cracas

  • Barnacles

  • Barnacles feeding

11b

Paguro (ermitão)

  • Hermit Crab

  • Hermit Crab

11c

Tatu de jardim

  • Woodlouse, also Pill Bug, Roly-Poly

11d

Lagosta

  • Atlantic lobster (Homarus americanus), regrowing a limb

  • Atlantic lobster (Homarus americanus), showing eggs

  • Spiny Lobster

11e

Camarão

Shrimp are slender with long muscular abdomens. They look somewhat like small lobsters, but not like crabs. The abdomens of crabs are small and short, whereas the abdomens of lobsters and shrimp are large and long. The lower abdomens of shrimp support pleopods which are well adapted for swimming. The carapace of crabs are wide and flat, whereas the carapace of lobsters and shrimp are more cylindrical. The antennae of crabs are short, whereas the antennae of lobsters and shrimp are usually long, reaching more than twice the body length in some shrimp species.

11f

Caranguejo

  • Green Crab (Carcinus maenas)

  • Rock Crab (Cancer irroratus)

  • Mottled Purse Crab (Persephona mediterranea)

  • Lady Crab (Ovalipes ocellatus)

  • Yellow Line Arrow Crab (Stenorhynchus seticornis)

11g

Siri

  • Blue Crab (Callinectes sapidus)


References

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