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Evidence for protracted and lecithotrophic larval development in the yeti crab Kiwa tyleri from hydrothermal vents of the East Scotia Ridge, Southern Ocean

Evidence for protracted and lecithotrophic larval development in the yeti crab Kiwa tyleri from hydrothermal vents of the East Scotia Ridge, Southern Ocean
Evidence for protracted and lecithotrophic larval development in the yeti crab Kiwa tyleri from hydrothermal vents of the East Scotia Ridge, Southern Ocean
The deep-sea squat lobster Kiwa tyleri is the dominant macroinvertebrate inhabiting hydrothermal vents on the northern and southern segments of the East Scotia Ridge in the Southern Ocean. Here, we describe the first zoeal stage of the species - which is morphologically advanced - and provide evidence for its lecithotrophy in development. This morphologically advanced stage at hatching suggests that dispersal potential during early ontogeny may be limited. Adults of Kiwa tyleri typically inhabit a warm-eurythermal, and spatially defined, temperature envelope of vent chimneys. In contrast, ovigerous females with late embryos are found away from these temperatures, off vent site. This implies that at least part of embryogenesis takes place away from the chemosynthetic environment. Larvae are released into the cold waters of the Southern Ocean that are known to pose physiological limits on the survival of reptant decapods. Larval lecithotrophy may aid long developmental periods under these conditions and facilitate development independent of pronounced seasonality in primary production. It remains uncertain, however, how population connectivity between distant vent sites may be achieved.
Anomura, endotrophy, cold adaptation, deep sea, dispersal, magnesium regulation, embryology, kiwaidae, squat lobsters
2195-2736
109-116
Thatje, Sven
f1011fe3-1048-40c0-97c1-e93b796e6533
Smith, Kathryn E.
8313a7a4-1d1b-4989-b96c-52a8c4c3676b
Marsh, Leigh
b9d089aa-91e4-4a2e-b716-a7352616c6a2
Tyler, Paul
d1965388-38cc-4c1d-9217-d59dba4dd7f8
Thatje, Sven
f1011fe3-1048-40c0-97c1-e93b796e6533
Smith, Kathryn E.
8313a7a4-1d1b-4989-b96c-52a8c4c3676b
Marsh, Leigh
b9d089aa-91e4-4a2e-b716-a7352616c6a2
Tyler, Paul
d1965388-38cc-4c1d-9217-d59dba4dd7f8

Thatje, Sven, Smith, Kathryn E., Marsh, Leigh and Tyler, Paul (2015) Evidence for protracted and lecithotrophic larval development in the yeti crab Kiwa tyleri from hydrothermal vents of the East Scotia Ridge, Southern Ocean. Sexuality and Early Development in Aquatic Organisms, 1 (2), 109-116. (doi:10.3354/sedao00011).

Record type: Article

Abstract

The deep-sea squat lobster Kiwa tyleri is the dominant macroinvertebrate inhabiting hydrothermal vents on the northern and southern segments of the East Scotia Ridge in the Southern Ocean. Here, we describe the first zoeal stage of the species - which is morphologically advanced - and provide evidence for its lecithotrophy in development. This morphologically advanced stage at hatching suggests that dispersal potential during early ontogeny may be limited. Adults of Kiwa tyleri typically inhabit a warm-eurythermal, and spatially defined, temperature envelope of vent chimneys. In contrast, ovigerous females with late embryos are found away from these temperatures, off vent site. This implies that at least part of embryogenesis takes place away from the chemosynthetic environment. Larvae are released into the cold waters of the Southern Ocean that are known to pose physiological limits on the survival of reptant decapods. Larval lecithotrophy may aid long developmental periods under these conditions and facilitate development independent of pronounced seasonality in primary production. It remains uncertain, however, how population connectivity between distant vent sites may be achieved.

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Published date: 28 April 2015
Keywords: Anomura, endotrophy, cold adaptation, deep sea, dispersal, magnesium regulation, embryology, kiwaidae, squat lobsters
Organisations: Ocean and Earth Science

Identifiers

Local EPrints ID: 373457
URI: https://eprints.soton.ac.uk/id/eprint/373457
ISSN: 2195-2736
PURE UUID: cbb1ef74-64da-4853-9ce1-1ad28fc1fba7

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Date deposited: 20 Jan 2015 09:24
Last modified: 30 Nov 2017 17:31

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Contributors

Author: Sven Thatje
Author: Kathryn E. Smith
Author: Leigh Marsh
Author: Paul Tyler

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