Results for “od”

forage

To search for food.

Used in 49 profiles

fractional spawner

A fish species in which females release eggs at intervals over a given period.

Used in 21 profiles

gamete

Cell that fuses with another during fertilization in organisms employing sexual reproduction, e.g., an egg or sperm cell.

Gammarus

Large genus of amphipod crustacean in the family Gammaridae of which members occur in both fresh and salt water. An important source of food for many fishes.

Used in 2 profiles

gas bladder

Gas-filled sac with 1-3 chambers, situated just below the vertebral column in most ray-finned fishes. Its primary function is to aid in buoyancy by offsetting the weight of heavier structures such as bone, but is also used for respiration or sound production in some species. Often reduced in benthic fishes and sometimes absent altogether. Also known as the air or swim bladder.

Used in 104 profiles

gene

Basic hereditary unit comprising a sequence of nuceleotides within a strand of DNA or RNA and occupying a fixed position on a chromosome. Generally determines a particular character or trait present in an organism by directing production and activity of RNA.

Used in 10 profiles

genital

Of or relating to the genitals or the process of biological reproduction.

Used in 74 profiles

genital papilla

Small tube arising from the urogenital opening in some fishes through which male or female gametes are expelled. May only be visible during the reproductive period depending on taxon. Its shape can sometimes used as a feature to identify the gender of an individual.

Used in 114 profiles

genitalia

The reproductive organs, especially used in reference to external sex organs.

gestation

Period of embryonic development in a viviparous organism.

Used in 31 profiles

gill raker

Any of the bony processes located on the gill arch which function to either retain food items or otherwise prevent solid matter from entering the gill chamber. Vary in number and size depending on taxon and therefore useful in identification.

Used in 88 profiles

gland

Cell, cell group, or organ secreting a substance used elsewhere in the body.

Used in 83 profiles

gonad

Any organ that produces gametes, e.g., a testicle or ovary.

Used in 11 profiles

Gondwana

Former supercontinent also known as Gondwanaland existing from approximately 510 to 180 Mya and comprising the majority of the landmasses in today's Southern Hemisphere, including Antarctica, South America, Africa, Madagascar and the Australian continent, plus the Arabian Peninsula and Indian subcontinent.

Used in 8 profiles

gram-negative

Of, relating to, or being a bacterium that does not retain the crystal violet dye used in Gram's method of staining.

gram-positive

Of, relating to, or being a bacterium that does retain the crystal violet dye used in Gram's method of staining.

graze

To feed continuously throughout a given period.

Used in 85 profiles

grindal worm

Vernacular name for the annelid worm Enchytraeus buchholzi (Vejdovsky, 1879), a species commonly cultured by aquarists for use as live fish food. Smaller, more adaptable, and temperature-tolerant than the related white worm, Enchytraeus albidus Henle, 1937.

Used in 78 profiles

gut loading

Process by which live prey is raised and fed nutritious foods prior to use, e.g., feeding crickets on dried fish food or fresh vegetables before being offered to the fish.

Used in 4 profiles

haor

Wetland ecosystem of which most are located in northeast Bangladesh. The typical form is that of a bowl or saucer-shaped depression and the core haor area is surrounded by hills of the Indian states of Meghalaya to the north, Tripura and Mizoram to the south, and Assam and Manipur to the east. The area is known locally as the 'Haor' or 'Sylhet' basin and floods extensively each year during the annual monsoons.

Used in 1 profile