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Temperature adaptation in larval development of lithodine crabs from deep-water lineages

Temperature adaptation in larval development of lithodine crabs from deep-water lineages
Temperature adaptation in larval development of lithodine crabs from deep-water lineages
Adaptations in per-offspring investment and larval development are considered to have been crucial to the global radiation of deep-water lineages of lithodine crabs (Lithodinae). Temperature is proposed to drive latitudinal trends in energy provisioning of eggs in marine invertebrates, mediated by thermally dependent intraspecific plasticity in per-offspring investment. Consequently, a changing climate may be expected to directly affect larval provisioning. We analysed available data to examine any differences in per-offspring investment and larval development among deep-water lineage lithodines. Although data are few, interspecific differences in the thermal scope of deep-water-lineage lithodine larvae appear coupled with differences in biogeography. This coupling suggests environmental temperature influences larval thermal scope. Lithodine phylogeography suggests that larval cold-eurythermy in deep-water-lineage lithodines is a derived trait that has evolved in relatively warm and variable subantarctic shallow water. Therefore, we hypothesise that capacity to adapt to warmer and more variable environmental conditions may afford deep-water-lineage lithodines some resilience to ocean warming, depending on the rates of environmental and adaptive change. Interspecific comparisons also suggest that larval duration and per-offspring investment are positively correlated. Faster development at a given temperature is associated with higher respiration rates and greater energetic reserve utilisation. Therefore, we hypothesise that selection pressure for contrasting metabolic adaptations in different thermal environments contributes to shifts in larval duration and per-offspring investment.
1385-1101
167-173
Brown, Alastair
909f34db-bc9c-403f-ba8f-31aee1c00161
Thatje, Sven
f1011fe3-1048-40c0-97c1-e93b796e6533
Oliphant, Andrew
a080aa80-9deb-4e70-aadb-7c0b02600735
Munro, Catriona
fcf87280-e033-4e41-8d50-2cba2a16869d
Smith, Kathryn E.
75b4bc22-cc17-4391-82f8-9f4da7c2df29
Brown, Alastair
909f34db-bc9c-403f-ba8f-31aee1c00161
Thatje, Sven
f1011fe3-1048-40c0-97c1-e93b796e6533
Oliphant, Andrew
a080aa80-9deb-4e70-aadb-7c0b02600735
Munro, Catriona
fcf87280-e033-4e41-8d50-2cba2a16869d
Smith, Kathryn E.
75b4bc22-cc17-4391-82f8-9f4da7c2df29

Brown, Alastair, Thatje, Sven, Oliphant, Andrew, Munro, Catriona and Smith, Kathryn E. (2018) Temperature adaptation in larval development of lithodine crabs from deep-water lineages. Journal of Sea Research, 167-173. (doi:10.1016/j.seares.2018.09.017).

Record type: Article

Abstract

Adaptations in per-offspring investment and larval development are considered to have been crucial to the global radiation of deep-water lineages of lithodine crabs (Lithodinae). Temperature is proposed to drive latitudinal trends in energy provisioning of eggs in marine invertebrates, mediated by thermally dependent intraspecific plasticity in per-offspring investment. Consequently, a changing climate may be expected to directly affect larval provisioning. We analysed available data to examine any differences in per-offspring investment and larval development among deep-water lineage lithodines. Although data are few, interspecific differences in the thermal scope of deep-water-lineage lithodine larvae appear coupled with differences in biogeography. This coupling suggests environmental temperature influences larval thermal scope. Lithodine phylogeography suggests that larval cold-eurythermy in deep-water-lineage lithodines is a derived trait that has evolved in relatively warm and variable subantarctic shallow water. Therefore, we hypothesise that capacity to adapt to warmer and more variable environmental conditions may afford deep-water-lineage lithodines some resilience to ocean warming, depending on the rates of environmental and adaptive change. Interspecific comparisons also suggest that larval duration and per-offspring investment are positively correlated. Faster development at a given temperature is associated with higher respiration rates and greater energetic reserve utilisation. Therefore, we hypothesise that selection pressure for contrasting metabolic adaptations in different thermal environments contributes to shifts in larval duration and per-offspring investment.

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Brown_al._J_Sea_Res_ms_II_revised2_clean (1) - Accepted Manuscript
Restricted to Repository staff only until 24 September 2019.
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Accepted/In Press date: 24 September 2018
e-pub ahead of print date: 26 September 2018

Identifiers

Local EPrints ID: 425048
URI: https://eprints.soton.ac.uk/id/eprint/425048
ISSN: 1385-1101
PURE UUID: e5fc1f08-5182-4b1a-9c51-0ce2e05b494a

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Date deposited: 09 Oct 2018 16:30
Last modified: 13 Mar 2019 17:58

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