2024-03-28T20:39:51Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/900962020-12-09T16:53:03Zcom_10261_14com_10261_8com_10261_123col_10261_267col_10261_376
DIGITAL.CSIC
author
Urzúa, Ángel
author
Guerao, Guillermo
author
Cuesta, José A.
author
Rotllant, Guiomar
author
Estévez, Alicia
author
Anger, Klaus
funder
German Academic Exchange Service
funder
Comisión Nacional de Investigación Científica y Tecnológica (Chile)
funder
CSIC - Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA)
2014-01-29T12:11:23Z
2014-01-29T12:11:23Z
2013-11
Marine and Freshwater Behaviour and Physiology 46(6): 381-397 (2013)
http://hdl.handle.net/10261/90096
10.1080/10236244.2013.857067
http://dx.doi.org/10.13039/501100001655http://dx.doi.org/10.13039/501100002848http://dx.doi.org/10.13039/100007652
Palaemonetes zariquieyi, an endemic palaemonid species of shrimp that lives in freshwater and brackish coastal habitats in eastern Spain, shows an abbreviated, non-feeding larval development comprising only three zoeal stages. To identify the endogenous bioenergetic fuel that allows for food-independent development from hatching to metamorphosis, larvae were reared under controlled laboratory conditions, and ontogenetic changes in dry weight (W), elemental (CHN), and lipid composition (total lipids, principal lipid classes, and fatty acids [FA]) were quantified at the onset of each zoeal stage and in the first juvenile. Values of W, C, and H per larva and per mass unit of W decreased throughout the time of larval development, while the N content showed only a weak decline (suggesting strong lipid but only little protein degradation). Correspondingly, directly measured values of total lipids (both in μg/larva and in % of W) decreased gradually, with neutral lipids (NL) consistently remaining the predominant and most strongly used fraction; sterol esters and waxes were not detected. In contrast to the NL, the fraction of polar lipids (PL) per larva remained stable and, as a consequence, tended to increase as a percentage of total lipids. Likewise, other important lipid fractions such as free FA and cholesterol remained stable throughout the time of larval development. Among the FA, palmitic (16:0), oleic (18:1n-9), linoleic (18:2n-6), and eicosapentaenoic (20:5n-3) acid were predominant, showing a significant decrease during larval development; stearic (18:0), vaccenic (18:1n-7), and arachidonic acid (20:4n-6) were found only in small amounts. Our results indicate that the lecithotrophic development of P. zariquieyi is primarily fuelled by the utilization of lipids (especially triacylglycerides and other NL), which is reflected by a decreasing carbon content. Proteins and PL, by contrast, are preserved as structurally indispensable components (nerve and muscle tissues, cell membranes). The abbreviated and non-feeding mode of larval development of P. zariquieyi may have an adaptive value in land-locked freshwater habitats, where planktonic food limitation is likely to occur. The patterns of reserve utilization are similar to those previously observed in other palaemonid shrimps and various other groups of decapod crustaceans with lecithotrophic larvae. This suggests a multiple convergent evolution of bioenergetic traits allowing for reproduction in food-limited aquatic environments. © 2013 Taylor & Francis
eng
openAccess
Ontogeny
Lecithotrophy
Freshwater
Caridea
Shrimp
Chemical compositions
Lipid
Palaemonetes zariquieyi
The bioenergetic fuel for non-feeding larval development in an endemic palaemonid shrimp from the Iberian Peninsula, Palaemonetes zariquieyi
artículo
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URL
https://digital.csic.es/bitstream/10261/90096/4/Urzua_et_al_2013.pdf
File
MD5
48b28d83592a8793deaad1d22d594895
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application/pdf
Urzua_et_al_2013.pdf