Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Effect of hypergravity on the Ca/Sr composition of developing otoliths of larval cichlid fish (Oreochromis mossambicus)
Autore:
Anken, RH; Ibsch, M; Breuer, J; Rahmann, H;
Indirizzi:
Univ Stuttgart Hohenheim, Inst Zool, D-70593 Stuttgart, Germany Univ Stuttgart Hohenheim Stuttgart Germany D-70593 93 Stuttgart, Germany Univ Stuttgart Hohenheim, Inst Agr Chem, D-70593 Stuttgart, Germany Univ Stuttgart Hohenheim Stuttgart Germany D-70593 93 Stuttgart, Germany
Titolo Testata:
COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY A-MOLECULAR AND INTEGRATIVE PHYSIOLOGY
fascicolo: 2, volume: 128, anno: 2001,
pagine: 369 - 377
SICI:
1095-6433(200102)128:2<369:EOHOTC>2.0.ZU;2-2
Fonte:
ISI
Lingua:
ENG
Soggetto:
GOLDFISH CARASSIUS-AURATUS; CALCIUM-CONCENTRATION RATIOS; INNER-EAR; ENVIRONMENTAL INDICATORS; STRONTIUM/CALCIUM RATIOS; FUNDULUS-HETEROCLITUS; ELECTRON-MICROSCOPY; SACCULAR EPITHELIUM; ONCORHYNCHUS-MYKISS; SUPPORTING CELLS;
Keywords:
inductively coupled plasma mass spectrometry; otolith; protein matrix; calcium; strontium; hypergravity; radius maximus; fish larvae;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
60
Recensione:
Indirizzi per estratti:
Indirizzo: Rahmann, H Univ Stuttgart Hohenheim, Inst Zool, Garbenstr 30, D-70593 Stuttgart, Germany Univ Stuttgart Hohenheim Garbenstr 30 Stuttgart Germany D-70593
Citazione:
R.H. Anken et al., "Effect of hypergravity on the Ca/Sr composition of developing otoliths of larval cichlid fish (Oreochromis mossambicus)", COMP BIOC A, 128(2), 2001, pp. 369-377

Abstract

The amounts of calcium and strontium were measured by inductively coupled plasma mass spectrometry (ICP-MS) in saccular and utricular inner ear otoliths (sagittae and lapilli, respectively) of developing cichlid fish. These fish had been maintained for 22 days at 3-g hypergravity conditions within a centrifuge. During this time-span. the animals completed their ontogenetic development from hatch to the free-swimming stage. Neither the morphogenetic development nor the timely onset and gain of performance of the swimming behaviour was impaired by the experimental conditions. Experimental and control animals also did not differ concerning their size (total length). ICP-MS revealed that the otoliths contained significantly less calcium (in mug/otolith) after hyper-g exposure compared to parallelly raised l-g controlspecimens (lapilli: 0.74 +/- 0.21 vs. 1.16 +/- 0.411 sagittae: 2.09 +/- 0.49 vs. 2.76 +/- 0.47). The content of strontium (in mug/otolith: lapilli: 0.0044 +/- 0.0023 vs. 0.0022 +/- 0.0013; sagittae: 0.0094 +/- 0.0026 vs. 0.0081 +/- 0.0016) and, consequently, the Sr/Ca ratio (Sr/Ca x 100) was increased (lapilli: 0.607 +/- 0.267 vs. 0.201 +/- 0.12; sagittae: 0.439 +/- 0.093vs. 0.301 +/- 0.086). Since the calcium content can he taken as a proxy for otolith weight, and because parallelly undertaken morphometric investigations revealed smaller otoliths (maximum radius and surface area) due to hyper-g exposure, the results suggest that the growth of otoliths at hyper-g is slowed down. Since the concentration of trace elements incorporated into otoliths is likely based on the composition of the respective protein matrix, our findings suggest that the protein metabolism is affected by hypergravity. (C) 2001 Elsevier Science Inc. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 04/07/20 alle ore 20:39:40