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Titolo:
ESTIMATION OF STARVATION AND DIET VARIATION OF THE RNA DNA RATIOS IN FIELD-CAUGHT SARDINA-PILCHARDUS LARVAE OFF THE NORTH OF SPAIN/
Autore:
CHICHARO MA; CHICHARO L; VALDES L; LOPEZJAMAR E; RE P;
Indirizzi:
UNIV ALGARVE,UCTRA,CAMPUS DE GAMBELAS P-8000 FARO PORTUGAL INST ESPANOL OCEANOG E-39004 SANTANDER SPAIN INST ESPANOL OCEANOG E-28020 MADRID SPAIN UNIV LISBON,FAC CIENCIAS,LAB MAR GUIA P-2750 CASCAIS PORTUGAL
Titolo Testata:
Marine ecology. Progress series
, volume: 164, anno: 1998,
pagine: 273 - 283
SICI:
0171-8630(1998)164:<273:EOSADV>2.0.ZU;2-N
Fonte:
ISI
Lingua:
ENG
Soggetto:
RNA DNA RATIOS; POLLOCK THERAGRA-CHALCOGRAMMA; HERRING CLUPEA-HARENGUS; NUTRITIONAL CONDITION; ENGRAULIS-MORDAX; TRACHURUS-SYMMETRICUS; FOOD AVAILABILITY; MARINE FISHES; GROWTH; RATES;
Keywords:
FISH LARVAE; RNA/DNA; SARDINA PILCHARDUS; STARVATION; DIEL VARIATION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
65
Recensione:
Indirizzi per estratti:
Citazione:
M.A. Chicharo et al., "ESTIMATION OF STARVATION AND DIET VARIATION OF THE RNA DNA RATIOS IN FIELD-CAUGHT SARDINA-PILCHARDUS LARVAE OFF THE NORTH OF SPAIN/", Marine ecology. Progress series, 164, 1998, pp. 273-283

Abstract

The aim of this study was to analyse the general larval condition, todetermine the incidence of starvation and to investigate the effect of time of day on RNA/DNA ratios among field-caught Sardina pilchardus (L.) larvae. The larvae were collected during 4 research cruises off northern Spain, during March, April, May and June 1992. A highly sensitive fluorometric method for nucleic acid quantification was applied tolarvae of S. pilchardus. The means of the RNA/DNA ratio were relatively high, so the larvae collected off northern Spain were generally in good condition. Low percentages of starving larvae (RNA/DNA ratio lessthan 1.3), ranging from 0 to 3.23%, were found over the 4 mo. The RNA/DNA ratios were significantly correlated with zooplankton biomass. Larvae collected at night revealed higher RNA/DNA ratios compared to larvae caught during the day. This seems to indicate that there is some endogenous rhythm in the production of RNA. It would then follow that, ii there are diel changes in RNA concentrations, average RNA indices can be unrepresentative if there is any day/night bias in sampling.

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Documento generato il 24/11/20 alle ore 21:33:58