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Glossary: courtship

February 15th, 2012 — 3:28pm

Any behavioural interaction between male and female individuals which leads to or initiates spawning.

Glossary: courtship ritual

February 15th, 2012 — 3:28pm

Complex, genetically-determined sequence of behaviour, usually employing a combination of visual, auditory and chemical stimuli taking place before spawning. Either or both sexes may be the protagonist.

Glossary: cranial

February 15th, 2012 — 3:28pm

Of or relating to the cranium or skull.

Glossary: cranium

February 15th, 2012 — 3:28pm

The skull, particularly the section enclosing the brain.

Glossary: crater lake

December 14th, 2012 — 1:52pm

Type of lake formed by accummulation of water in a volvanic crater or caldera.

Glossary: crenate

February 15th, 2012 — 3:28pm

Having a margin or edge consisting of shallow, rounded or scalloped projections. Similar to crenulate.

Glossary: crenulate

February 15th, 2012 — 3:28pm

Having a finely crenate edge or margin.

Glossary: crepuscular

February 15th, 2012 — 3:28pm

Active during twilight.

Glossary: crest

February 15th, 2012 — 3:28pm

Bony or fleshy ridge on the head or certain parts of the body, e.g., the caudal peduncle.

Glossary: crevicular

February 15th, 2012 — 3:28pm

Dwelling in crevices.

Glossary: cross

February 22nd, 2012 — 10:42am

To crossbreed; an organism produced by crossbreeding; a hybrid

Glossary: crossbreed

February 22nd, 2012 — 10:46am

An organism with parents of two differentĀ breeds, races, varieties, or species; the process involved in producing such an organism.

Glossary: crustacean

February 15th, 2012 — 3:28pm

Any member of the predominantly aquatic arthropod grouping Crustacea which currently contains almost 70,000 recognised species, including all crabs, lobsters, crayfish, shrimp, krill and barnacles. It’s difficult to define their characteristics since the group is of arguable hierarchical status, generally regarded to represent either a Phylum or Subphylum.

Glossary: cryptic

February 15th, 2012 — 3:28pm

In biology to refer to an organism or individual tending to conceal or camouflage itself, usually by some phenotypic or morphological means.

Glossary: ctenii

February 15th, 2012 — 3:28pm

The minute projections characteristic of ctenoid scales.

Glossary: ctenoid

February 15th, 2012 — 3:28pm

Comblike; having an edge or margin with multiple, tiny projections resembling the teeth of a comb.

Glossary: ctenoid scale

February 15th, 2012 — 3:28pm

Scale type having ctenii on the posterior edge and a consequent rough texture.

Glossary: cubic centimeter

February 15th, 2012 — 3:28pm

A measurement of liquid, equivalent to a cube 1cm on each side (US spelling).  Also known as a millilitre, since as it is one thousandth of a litre.

Glossary: cubic centimetre

February 15th, 2012 — 3:28pm

A measurement of liquid, equivalent to a cube 1cm on each side.  Also known as a millilitre, since it is one thousandth of a litre.

Glossary: cuckoldry

February 15th, 2012 — 3:28pm

Behavioural strategy seen in certain nest-building fishes in which one or more males that are not an accepted part of a spawning event fertilise some eggs. Such individuals are commonly referred to as sneaker, sneaky or satellite males.