Effects of a luteinizing hormone-releasing hormone analogue (LHRHa) on the reproductive performance of spotted sand bass paralabrax maculatofasciatus (Percoidei: Serranidae)

Translated title of the contribution: Effects of a luteinizing hormone-releasing hormone analogue (LHRHa) on the reproductive performance of spotted sand bass paralabrax maculatofasciatus (Percoidei: Serranidae): Serranidae)

Juan Pablo Alcántar-Vázquez, Hugo Skyol Pliego-Cortés, Silvie Dumas, Renato Peña-Martínez, Martín Rosales-Velázquez, Pablo Pintos-Terán

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

Hormonal induction of spotted sand bass Paralabrax maculatofasciatus, was investigated in order to induce and synchronize spawning. Three experiments were conducted using wild fish captured in the Gulf of California: 1) LHRHa (luteinizing hormone-releasing hormone analogue) induced spawning with concentrations of 25, 50, 100 μg kg-1 and saline solution, 2) Effects of LHRHa on motility and sperm density, and 3) Induction and incubation of spawns obtained using LHRHa. In experiments 2 and 3 using concentrations of 12.5, 25, 50 μg kg-1 and saline solution. In experiment 1, a higher spawning ratio was observed for the concentration of 25 μg kg-1; however, no significant differences were observed in the proportion of floating (viable) eggs. In experiment 2, significant differences (P < 0.05) were observed in duration of sperm motility and sperm density, with highest duration registered for wild fish (control group) and highest density registered for laboratory control group and concentration of 12.5 μg kg-1. In experiment 3, significant differences (P < 0.05) were observed between treatments in volume of spawned eggs and proportion of fertilized eggs, with higher values shown for the concentrations of 50 and 12.5 μg kg-1, respectively. Survival at hatching and proportion of live yolk-sac larvae were significantly higher (P < 0.05) for the concentration of 12.5 μg kg-1. LHRHa was effective in inducing and synchronizing the spawning of spotted sand bass, a process which will be used for massive egg production.

Translated title of the contributionEffects of a luteinizing hormone-releasing hormone analogue (LHRHa) on the reproductive performance of spotted sand bass paralabrax maculatofasciatus (Percoidei: Serranidae): Serranidae)
Original languageEnglish
Pages (from-to)487-496
Number of pages10
JournalLatin American Journal of Aquatic Research
Volume44
Issue number3
DOIs
StatePublished - Jul 2016
Externally publishedYes

Keywords

  • LHRHa
  • Paralabrax maculatofasciatus
  • Spawn
  • Sperm cell density
  • Sperm motility
  • Survival

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