Improved Induced-Spawning Protocol for the Spotted Rose Snapper (Lutjanus guttatus)
Date
2009
Contributor
Advisor
Department
Instructor
Depositor
Speaker
Researcher
Consultant
Interviewer
Narrator
Transcriber
Annotator
Journal Title
Journal ISSN
Volume Title
Publisher
Israeli Journal of Aquaculture - BAMIGDEH
Volume
Number/Issue
Starting Page
Ending Page
Alternative Title
Abstract
An improved protocol for hormonal induction of spawning in spotted rose snapper (Lutjanus guttatus) resulted in increased spawning efficiency in newly-caught wild breeders and wild-caught adults maintained in captivity for more than a year. A controlled-release delivery system (implant) based on an ethylene-vinyl acetate copolymer (EVAc) matrix was loaded with gonadotropin-releasing hormone agonist (GnRHa). The required GnRHa dose was established in two stages. The first stage included meta-analysis of our earlier experiments with wild spawners; the second stage included new experiments with wild and captive breeders. A nomograph was devel- oped to calculate the required GnRHa implant dose, taking into account the origin of the female (wild vs. captive), the initial mean oocyte diameter, and body weight. The effective GnRHa dose was greater in wild than captive females and, in both cases, inversely related to mean oocyte diameter. Using this nomograph, over half the wild females with a mean oocyte diam- eter of ≥425 μm and over half the captive females with a mean oocyte diam- eter of ≥350 μm responded to GnRHa implant treatment (producing multi- ple spawning events in captives), with mean total relative fecundity ranging 80-278 x 103 eggs/kg body weight and 51-85% fertilization success. The nomograph can be used to calculate the GnRHa implant dose required to induce spawning in this species under commercial aquaculture conditions.
Description
Keywords
spotted rose snapper, Lutjanus guttatus, induced spawning, nomograph, GnRHa, Fish culture--Israel--Periodicals., Fish culture--Periodicals., Aquaculture--Israel--Periodicals., Aquaculture--Periodicals.
Citation
Ibarra-Castro, L., & Alvarez-Lajonchere, L. (2009). Improved Induced-Spawning Protocol for the Spotted Rose Snapper (Lutjanus guttatus). The Israeli Journal of Aquaculture - Bamidgeh, 61(2), 121-133.
Extent
13 pages
Format
Geographic Location
Time Period
Related To
Related To (URI)
Table of Contents
Rights
Rights Holder
Local Contexts
Collections
Email libraryada-l@lists.hawaii.edu if you need this content in ADA-compliant format.