Effects of dietary carnitine on growth rates and ž body composition of hybrid striped bass Morone / saxatilis male x M. chrysops female

نویسندگان

  • Ronald G. Twibell
  • Paul B. Brown
چکیده

The effects of carnitine were evaluated in diets fed to hybrid striped bass. The basal diet contained 34.6% crude protein supplied by casein, gelatin and crystalline L-amino acids and 6.0% lipid supplied by menhaden oil. Four dietary treatments contained L-carnitine concentrations of either 2.1, 41.0, 212.0 or 369.7 mgrkg diet. Dietary treatments were fed to apparent satiation twice daily to triplicate groups of hybrid striped bass initially weighing 13.5 grfish. At the end of the 8-week feeding trial, feed intake and weight gain of fish fed 369.7 mg carnitinerkg diet were significantly increased compared to fish fed the basal diet containing 2.1 mg carnitinerkg diet. However, there were no significant differences in feed intake or weight gain among fish fed 2.1, 41.0 or 212.0 mg carnitinerkg diet. Feed efficiency, total liver lipid concentration, intraperitoneal Ž . fat ratio IPF and proximate composition of muscle and carcass were not significantly affected by dietary carnitine concentration. Serum concentrations of total and free carnitine and carnitine esters were not significantly different among fish fed any of the diets, although values tended to increase with increasing dietary carnitine. Results of this study indicate that growth rate, but not body composition, of hybrid striped bass can be improved with relatively low concentrations of dietary carnitine. q 2000 Elsevier Science B.V. All rights reserved.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Transcriptome annotation and marker discovery in white bass (Morone chrysops) and striped bass (Morone saxatilis).

Striped bass (Morone saxatilis) and white bass (Morone chrysops) are the parental species of the hybrid striped bass, a major U.S. aquaculture species. Currently, genomic resources for striped bass, white bass, and their hybrid lag behind those of other aquaculture species. Current resources consist of a medium-density genetic linkage map and a well-annotated ovarian transcriptome. A well-annot...

متن کامل

Immune and histopathologic responses of DNA-vaccinated hybrid striped bass Morone saxatilis x M. chrysops after acute Mycobacterium marinum infection.

The post-challenge immune and histopathologic responses of hybrid striped bass vaccinated with a DNA vaccine encoding the Mycobacterium marinum Ag85A gene and subsequently challenged with M. marinum were investigated. Juvenile hybrid striped bass Morone saxatilis x M. chrysops were injected intramuscularly with 25 or 50 microg DNA plasmid and developed significant specific protective responses ...

متن کامل

A unique Mycobacterium species isolated from an epizootic of striped bass (Morone saxatilis).

We isolated a Mycobacterium sp. resembling Mycobacterium marinum and M. ulcerans from diseased striped bass (Morone saxatilis) during an epizootic of mycobacteriosis in the Chesapeake Bay. This isolate may represent an undescribed Mycobacterium species, based on phenotypic characteristics and comparative 16S rRNA gene sequence.

متن کامل

Effect of Temperature and Salinity on Growth Performance in Anadromous (Chesapeake Bay) and Nonanadromous (Santee-Cooper) Strains of Striped Bass Morone saxatilis

During the first year of life of Striped Bass Morone saxatilis, the effect of estuarine habitat use on growth rate is poorly understood. In a split-plot experiment, growth and feeding rates were compared between anadromous (Chesapeake Bay) and nonanadromous (Santee-Cooper) broods of juvenile striped bass (45–90 days posthatch) exposed to a range of salinity levels (0.5, 7, and 15 ppt) and tempe...

متن کامل

Oceanic migration rates of Upper Chesapeake Bay striped bass ( Morone saxatilis ) , determined by otolith microchemical analysis

As an estuarine-dependent species, striped bass (Morone saxatilis) demonstrate large plasticity in migration patterns (Secor and Piccoli, 1996). Striped bass in Chesapeake Bay are partial migrants; only a fraction of individuals will leave estuarine habitats for oceanic waters (Kohlenstein, 1981). Never the less, Chesapeake Bay striped bass are the major contributors to interjurisdictional ocea...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2000