@article{fdi:010067773,
  title = {{S}easonal, ontogenetic and sexual changes in lipid metabolism of the small-spotted catshark ({S}cyliorhinus canicula) in deep-sea free-living conditions},
  author = {{V}alls, {E}. and {N}avarro, {J}. and {B}arria, {C}. and {C}oll, {M}arta and {F}ernandez-{B}orras, {J}. and {R}otllant, {G}.},
  editor = {},
  language = {{ENG}},
  abstract = {{M}arine predators, such as elasmobranchs, exhibit variations in nutritional conditions related to both reproductive traits and food availability in the marine environment throughout the year. {T}he main objective of this study was to examine changes in several blood physiological parameters in a demersal shark, the small-spotted catshark ({S}cyliorhinus canicula), in the wild in relation to season, sex and maturity stage. {F}or this purpose, 108 individuals at different de{K}elopmental stages were captured and released alive in the western {M}editerranean. {B}lood was obtained from caudal vessels and plasma lipid fractions (total cholesterol, triglycerides and phospholipids) and a ketone body (3-beta-hydroxybutyrate) were measured. {D}uring summer, plasma triglyceride and phospholipid levels were lower in adults than in juveniles (mainly in females, probably related to breeding season and laying eggs). {P}lasma cholesterol levels also showed higher values in summer, indicating higher physical activities during summer and revealing that lipid fractions are more related to reproduction than to nutrition. {P}lasma 3-beta-hydroxybutyrate variations showed a different pattern. {N}o differences were found between sex or maturity stage during summer, although the highest values in adult and juvenile males during winter indicates higher physical activity of males. {T}his study, uses an innovative methodology to establish a correlation between lipid fractions and ketone bodies from the blood of wild individuals and changes in sexual and nutritional status. {T}his method was conducted without damage to the target species and provides new information on the physiology of this abundant elasmobranch in the {M}editerranean {S}ea.},
  keywords = {{C}holesterol ; {E}lasmobranch ; {P}hysiological parameter ; {P}hospholipids ; {T}riglycerides ; {K}etone bodies ; {ESPAGNE} ; {MEDITERRANEE}},
  booktitle = {},
  journal = {{J}ournal of {E}xperimental {M}arine {B}iology and {E}cology},
  volume = {483},
  numero = {},
  pages = {59--63},
  ISSN = {0022-0981},
  year = {2016},
  DOI = {10.1016/j.jembe.2016.07.001},
  URL = {https://www.documentation.ird.fr/hor/fdi:010067773},
}