iTunes

Opening the iTunes Store.If iTunes doesn’t open, click the iTunes icon in your Dock or on your Windows desktop.Progress Indicator
Opening the iBooks Store.If iBooks doesn't open, click the iBooks app in your Dock.Progress Indicator
iTunes

iTunes is the world's easiest way to organize and add to your digital media collection.

We are unable to find iTunes on your computer. To download from the iTunes Store, get iTunes now.

Do you already have iTunes? Click I Have iTunes to open it now.

I Have iTunes Free Download
iTunes for Mac + PC

Effects of Stage 2 Juvenile Removal Frequency on Final Survival Rates in Artificial Incubation of Crayfish Eggs (Pacifastacus Leniusculus Dana. Astacidae).

Journal of Shellfish Research 2007, April, 26, 1

Journal of Shellfish Research

This book is available for download with iBooks on your Mac or iOS device, and with iTunes on your computer. Books can be read with iBooks on your Mac or iOS device.

Description

ABSTRACT In artificial incubation of astacid crayfish eggs, stage 2 juveniles must be removed by hand from incubators and a significant decrease in survival rates has been recorded between hatching (stage 1) and the first moult (stage 2). To reduce these losses, eggs of Pacifastacus leniusculus were incubated at a density of 6.6 cm-2 and different removal frequencies of stage 2 juveniles from the incubators were tested: every 5, 4, 3, and 2 days, daily and only once at the end of incubation. Formaldehyde was used to control growth of fungi. The best final survival rate (88.6%) was obtained when stage 2 juveniles were removed daily from the incubators. There were no significant differences nor between removals every 2 and 3 days (79.6% and 76.5%, respectively) neither between 4 and 5 days (72.6% and 69.8%, respectively). Considering all treatments, final survival rates decreased as juvenile removal was delayed up to only one removal at the end of incubation. KEY WORDS: astacid crayfish, artificial incubation, juvenile removal, Pacifastacus leniusculus

Effects of Stage 2 Juvenile Removal Frequency on Final Survival Rates in Artificial Incubation of Crayfish Eggs (Pacifastacus Leniusculus Dana. Astacidae).
View In iTunes
  • 2,99 €
  • Available on iPhone, iPad, iPod touch, and Mac.
  • Category: Life Sciences
  • Published: 01 April 2007
  • Publisher: National Shellfisheries Association, Inc.
  • Print Length: 9 Pages
  • Language: English
  • Requirements: To view this book, you must have an iOS device with iBooks 1.3.1 or later and iOS 4.3.3 or later, or a Mac with iBooks 1.0 or later and OS X 10.9 or later.

Customer Ratings

We have not received enough ratings to display an average for this book.