anadromous

/ə'nædrəməs/

Thân thiện

Salmon are an anadromous species that swim upstream to lay their eggs.

Definition

1. Adjective:
   • Migrating from the sea to fresh water to spawn: Describes fish that live most of their lives in the ocean but swim up rivers to breed and lay eggs in freshwater.

Usage

• The term anadromous is used specifically in biology and ecology to describe the life cycle of certain fish species. It is a technical term.
• It is typically used attributively (before a noun) to describe the fish, as in "anadromous fish" or "anadromous species."
• It contrasts with catadromous (fish that migrate from fresh water to the sea to spawn).

Examples

• Adjective:
  • Salmon are a classic example of anadromous fish.
  • The conservation project aims to protect the spawning grounds of anadromous species like shad and sturgeon.
  • Understanding anadromous migration patterns is crucial for managing fisheries.

Advanced Usage

• "Anadromous migration": The specific journey from saltwater to freshwater undertaken for reproduction.
  • The dam construction disrupted the anadromous migration of several fish populations.
• Used in formal scientific and environmental contexts, such as research papers, policy documents, and conservation discussions.

Variants and Related Words

• Anadromy (n): The characteristic or behavior of being anadromous.
  • The anadromy of Pacific salmon is a remarkable natural phenomenon.
• Diadromous (adj): A broader term for fish that migrate between saltwater and freshwater. Anadromous is a type of diadromous migration.

Synonyms

• Upstream-migrating (in a biological context).
• Sea-run (less technical, often used in fishing contexts, e.g., "sea-run trout").

Antonyms

• Catadromous (adj): Migrating from fresh water to the sea to spawn (e.g., the American eel).
• Potamodromous (adj): Migrating entirely within freshwater systems.
• Oceanodromous (adj): Migrating entirely within the ocean.

Học thuật

Adjective

1. migrating from the sea to fresh water to spawn