Results for “sp.”

non-native

Used in reference to a species occurring, living, or growing in a region outside its natural geographic range; non-indigenous.

Used in 28 profiles

nuchal hump

A protruding growth of tissue found on the head in sexually-mature, usually male, specimens of certain fishes.

Used in 42 profiles

nuclear family

Post-spawning behaviour in which parental duties are shared by both male and female.

Used in 6 profiles

ocellate

Possessing or resembling an ocellus or ocelli; having a spotted colour pattern.

oedema

Excess and subsequent accummulation of watery fluid in cells, tissues, or body cavities of an organism. Also spelled 'edema'.

oesophagus

Muscular tube through which food passes from mouth to stomach in vertebrates; the gullet. Also spelled 'esophagus'.

oil globule

Small, spherical droplet of oil found within the yolk sac of fish larvae. There may be one or more present and the size, positioning, and colour are also variable meaning they can be useful in terms of taxon identification.

orbicular

Circular or spherical in shape.

oviposit

To deposit an egg during a spawning event,

ovipositor

Tubular structure used to deposit eggs in some fishes. Formed by an extension of the genital opening and usually concealed but sometimes becomes visible prior to spawning. Also referred to as the genital papilla.

Used in 31 profiles

ovophily

Reproductive strategy whereby the eggs are laid on a solid surface where they are immediately collected and brooded in the mouth of one or both parents. Seen in some Geophagus spp., for example.

ovoviviparity

Reproductive strategy in which fertilisation occurs internally and the eggs develop inside the body of the mother until hatched, at which point live offspring are born. There is no placental connection between mother and embryo unlike in viviparous species.

oxytetracycline

Broad spectrum antibiotic used to treat both gram-negative and gram-positive bacterial infections.

pair

A male and a female organism of the same species. Also see breeding pair.

Used in 866 profiles

Palghat Gap

Also known as the 'Palakkad Gap', a low mountain pass representing the major break in the Western Ghats mountain range. The Nilgiri Hills rise to around 1100 m AMSL north of the gap and the Anaimalai Hills approximately 2000 m AMSL to the south, with average elevation within the gap 144 m AMSL. The gap has been shown to represent a biogeographic barrier restricting gene flow between populations of numerous species including Indian elephant and various birds.

Used in 1 profile

parallel evolution

Development of similar forms or traits in related, but separate, species descending from the same ancestor, but occupying different clades.

Used in 8 profiles

Paramecium

Genus of unicellular ciliate protozoa with a shape resembling a grain of rice, a number of species of which are cultured as live food for small fishes and fry.

Used in 117 profiles

parasite

Organism that lives on or in a second, host organism of a different species, with the latter deriving no benefit or being directly harmed by the relationship.

Used in 133 profiles

parietal

Of, relating to, or forming the walls or part of the walls of a body part, organ, cavity, or similar structure. Often used specifically in reference to either of a pair of bones forming much of the upper cranium.

Used in 42 profiles

peat

A compressed accumulation of partially-decomposed, chiefly vegetable matter typically found in certain marshes, bogs, and peat swamp forests throughout the world. It forms via breakdown of various plants and other organic materials in water when full decomposition is prevented due to localised acidic, anaerobic conditions. As a result of this somewhat specific nature the organisms inhabiting peaty environments are often stenotypic and found nowhere else. Peat can be used as a fuel when dried and thus has industrial importance in some countries. Also used in aquaria, especially in order to simulate blackwater habitats, either in pure, artificially-granulated or liquid extract form.

Used in 268 profiles