Difference between revisions of "AY Honors/Crustaceans/Answer Key/es"

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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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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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File:Barnacle 6758 W.jpg|Barnacles
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File:Lobster 6916 W.jpg|Atlantic lobster (Homarus americanus), regrowing a limb
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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.
 
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Latest revision as of 23:56, 25 July 2022

Other languages:
English • ‎español • ‎português do Brasil
Crustáceos

Nivel de destreza

2

Año

2012

Version

24.11.2024

Autoridad de aprobación

División Sudamericana

Crustaceans AY Honor.png
Crustáceos
Estudio de la naturaleza
Nivel de destreza
123
Autoridad de aprobación
División Sudamericana
Año de introducción
2012


1

Nombrar por lo menos cuatro características de un crustáceo.



2

¿Qué es el exoesqueleto?



3

¿A qué filo pertenece este grupo?



4

¿Cómo se divide el cuerpo de estos animales?



5

¿En qué pasajes de la Biblia se encuentra información sobre el consumo de crustáceos?



6

¿En qué se diferencia un sirí de un cangrejo? ¿En qué lugares se encuentran estos animales?



7

Nombrar un crustáceo terrestre.



8

¿Cómo se puede diferenciar entre un sirí macho y una hembra? ¿Por qué es importante?


BlueCrab 0553 W.jpg Crab 3396 W.jpg


9

¿Cuál es la importancia de lo micro crustáceos para el medio ambiente?



10

Realizar las siguientes actividades y presentar un informe ilustrado:



10a

Disecar un camarón e indicar sus partes principales.


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

En una clase de práctica, observar en vivo las diversas clases de crustáceos. Esquematizar, por lo menos, 2 de ellos.




10c

Ser capaz de diferenciar entre cangrejos y sirí, y saber diferenciar entre machos y hembras.




11

Ser capaz de identificar en vivo o a través de imágenes de los siguientes animales:



11a

Percebe


  • Balanos

  • Balanos comiendo


11b

Paguro (ermitaño)


  • Cangrejo ermitaño

  • Cangrejo ermitaño


11c

Tatú de jardín (caracolito)


  • Cochinilla (marranitos, bichos bola)


11d

Langosta


  • Bogavante americano (Homarus americanus), volviendo a crecer una extremidad

  • Bogavante americano (Homarus americanus), mostrando sus huevos

  • Langosta espinosa


11e

Camarón



11f

Cangrejo


11g

Sirí





Referencias

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