Results for “od”

parental family

Behaviour in which both parents equally share the duties of broodcare.

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

parthenogenesis

Method of asexual reproduction by which an unfertilized egg develops into a new individual exhibited by certain fishes.

Used in 1 profile

peat swamp forest

Type of tropical moist forest lying over a thick bed of acidic peat, over 60% of which occur in Indonesia and Malaysia. Typically contain water with very low pH (<4.0) that is stained brown due to the release of various organic compounds from the decaying peat and thus often referred to as blackwater swamps. Usually contain some permanent water but also flood seasonally. Highly biodiverse when in pristine condition, with many species found nowhere else on earth, though increasingly subjected to intensive drainage, burning and subsequent conversion to agriculture in recent decades.

Used in 89 profiles

pelagic phase

Period of time during the life cycle spent floating freely in the water column, usually as a larval constituent of plankton. Relatively common in marine fishes but also typical of amphidromous and diadromous species.

pelvic disc

Disc-shaped modification of the pelvic fins, which are often fused, used to adhere to surfaces via suction. Present in certain fishes, especially members of the family Gobiidae. Also known as sucking disc.

Used in 31 profiles

phenology

Study of periodic events in the life cycle of organisms and their relationship with seasonal and interannual climatic changes, e.g., migration.

pigment

Substance producing a characteristic color in plant or animal tissue.

Used in 60 profiles

planaria

Generic term applied to numerous non-parasitic flatworms of the class Turbellaria. Also a genus within that class, Planaria. Various species occur in aquaria where they're most often associated with accumulation of uneaten food or organic material and normally considered pests.

plankton

Any organism, or more typically, collection of organisms drifting freely in a body of water. Used in reference to both microscopic, e.g. algae, fish larvae, and larger, e.g. jellyfish, organisms.

Used in 15 profiles

poikilotherm

An organism having a body temperature that varies with the temperature of its surroundings; a cold-blooded organism.

polyandry

Reproductive behaviour in which a female spawns with more than one male during the breeding season.

polygamy

Reproductive behaviour in which an individual spawns with more than a single partner during the breeding season.

polygyny

Reproductive behaviour in which a male spawns with more than one female during the breeding season.

Used in 1 profile

polyp

One of two types of body form occurring in coelenterates, comprising a hollow cylindrical body with a ring of tentacles around the mouth.

polyphagous

Feeding on numerous food types; having a generalistic diet.

precaudal

In front of the caudal fin or posterior end of the body.

Used in 13 profiles

promiscuous

Not selective, especially used in reference to sexual behaviour. Sometimes used in reference to the reproductive behaviour of certain fishes.

protandry

Form of sequential hermaphroditism in which male offspring become female at some point during their life cycle.