Abstract

The effects of different stressors on the atretic degeneration of ovarian vitellogenic follicles, as well as on the ovarian mass, were examined in female Atlantic bluefin tuna, Thunnus thynnus (L.), from the Mediterranean Sea. The stressors taken into consideration were short-term starvation (up to 14 days), long-term cage rearing (1 year) and crowding-induced severe panic frenzy. Wild-caught individuals were used as a control group. Fish subjected to either severe panic frenzy or starvation exhibited a decrease in gonad mass and had significantly higher intensity of a atresia in the vitellogenic follicles (means: 78% and 58%, respectively; range: 36–100%) than either wild or long-term caged individuals (means: 32% and 30%, respectively; range: 19–44%). The extensive atresia in fish stressed by severe panic frenzy was observed as early as 24 h after the stressing event. The present study represents the first evidence of the extreme susceptibility of Atlantic bluefin tuna to severe acute stress during vitellogenesis; it also shows that starvation is associated with progressive reabsorption of vitellogenic oocytes.

Autore Pugliese

• Corriero Aldo , Zupa Rosa

Tutti gli autori

• CORRIERO A.;POUSIS C.;DEFLORIO M.;SANTAMARIA N.;ZUPA R.

Titolo volume/Rivista

Non Disponibile

Anno di pubblicazione

2011

ISSN

0140-7775

ISBN

Non Disponibile

Numero di citazioni Wos

7

Ultimo Aggiornamento Citazioni

Non Disponibile

Numero di citazioni Scopus

9

Ultimo Aggiornamento Citazioni

Non Disponibile

Settori ERC

Non Disponibile

Codici ASJC

Non Disponibile