Migration Knowledge-Based Download PDF

Questions

1. 1.

   In behavioral ecology, cross-breeding experiments between blackcap warblers (Sylvia atricapilla) with distinct southwest and southeast migratory routes produced hybrid offspring that oriented due south. Which conclusion regarding migratory behavior is directly supported by these findings?

   • A) Migratory routes are socially transmitted through juvenile imitation of experienced flock members.
   • B) Directional orientation during migration is guided exclusively by celestial landmarks learned after fledging.
   • C) Migratory orientation has an innate, genetically determined component.
   • D) Migratory trajectories are shaped entirely by prevailing seasonal wind patterns encountered during flight.
2. 2.

   During preparation for long-distance migration, many birds accumulate substantial fat reserves rather than equivalent masses of glycogen. What is the primary physiological advantage of utilizing lipids as the main fuel for migratory flight?

   • A) They provide a significantly higher energy yield per unit mass and produce crucial metabolic water when oxidized.
   • B) They can be mobilized much more rapidly through anaerobic pathways during periods of high-altitude hypoxia.
   • C) They are stored in intracellular fluid without requiring enzymatic breakdown, eliminating digestive delays.
   • D) They lower overall body density, allowing birds to generate passive aerodynamic lift without muscular expenditure.
3. 3.

   In the study of migratory animal behavior, which ability uniquely defines true navigation, distinguishing it from simple directional orientation?

   • A) Maintaining a fixed compass bearing relative to celestial cues or the geomagnetic field throughout transit
   • B) Determining geographic position and correcting for displacement to reach a specific destination without familiar local landmarks
   • C) Following continuous geographic corridors such as coastlines, river valleys, or mountain ridges toward a destination
   • D) Executing an innate sequence of predetermined headings and travel durations across successive migratory segments
4. 4.

   Which environmental factor acts as the primary proximate cue that initiates seasonal migration in many temperate bird species?

   • A) A sudden drop in ambient temperature
   • B) A progressive change in day length (photoperiod)
   • C) An acute depletion of local food availability
   • D) An increase in territorial aggression among conspecifics
5. 5.

   Which of the following characteristics best defines true animal migration and distinguishes it from dispersal?

   • A) Irreversible, one-way departure of individuals from their natal site to prevent localized inbreeding
   • B) Opportunistic and irregular movements throughout an unpredictable habitat in tracking scarce food patches
   • C) Regular, seasonal, two-way movement of a population between distinct geographic regions
   • D) Daily localized travel between sleeping shelters and feeding territories driven strictly by circadian rhythms