Idotea metallica

Bosc, 1801

metallic isopod

Idotea metallica is a neustonic marine isopod in the Idoteidae, commonly known as the metallic isopod. It is recognized by its metallic coloration and blunt, squared-off . The inhabits drifting objects at the sea surface, forming persistent local on floating of debris. It has a worldwide distribution in open ocean waters but is competitively inferior to coastal such as Idotea baltica, limiting its persistence in nearshore environments.

Neustonic animals collected around Bermuda by Rebecca R. Helm. Used under a CC BY-SA 4.0 license.

Annual report of the New Jersey State Museum, 1911 - including a list of the specimens and publications received during the year, with a report of the crustacea of New Jersey (1912) (19178146358) by Internet Archive Book Images. Used under a No restrictions license.

Pronunciation

How to pronounce Idotea metallica: /ɪˈdɒtiə mɪˈtælɪkə/

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Identification

Distinguished from related Idotea by its metallic coloration and the blunt, squared-off shape of the (the of the ). These features allow visual separation from the coastally distributed Idotea baltica, with which it may co-occur when blown inshore.

Images

Habitat

Neustonic; inhabits objects drifting at the sea surface, including floating of debris and drift material. Laboratory studies demonstrate capacity to establish on spatially limited, isolated substrates. Open sea environments support persistent metapopulations, while coastal waters present higher extinction risk due to competitive interactions and patch destruction.

Distribution

Worldwide in open ocean waters. Documented from the Mediterranean Sea, North Atlantic, North Sea, and waters off the west coast of Britain (where it occurs occasionally as non-resident plankton). Distribution is associated with shelf-slope frontal structures.

Life Cycle

on drift material include all developmental stages, indicating complete occurrence on floating substrates. Laboratory populations in 5-litre microcosms reached approximately 130 individuals, demonstrating capacity for population establishment on isolated, spatially limited substrates.

Behavior

Competitively inferior to the coastally distributed Idotea baltica; laboratory went extinct within 12 weeks when I. baltica was present. High rates expected in coastal waters due to elevated , though metapopulation persistence is primarily restricted to open sea environments.

Ecological Role

Forms persistent local on neustonic drift material, representing a colonist of ephemeral floating in open ocean .

Similar Taxa

Idotea balticaCoastally distributed that competitively excludes I. metallica; I. metallica go extinct within 12 weeks when I. baltica is present. Distinguished by preference and lack of metallic coloration.