Pituitary follicle-stimulating hormone (FSH) and luteinizing hormone (LH) levels in maturing female flounder Platichthys flesus under hydrostatic pressure simulating vertical migrations

A Damasceno-Oliveira; B Levavi-Sivan; Joseph Aizen; J Gonçalves; B Fernández-Durán; J Coimbra

doi:10.1080/17451000.2013.793813

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Pituitary follicle-stimulating hormone (FSH) and luteinizing hormone (LH) levels in maturing female flounder Platichthys flesus under hydrostatic pressure simulating vertical migrations

Journal article

Peer reviewed

Pituitary follicle-stimulating hormone (FSH) and luteinizing hormone (LH) levels in maturing female flounder Platichthys flesus under hydrostatic pressure simulating vertical migrations

A Damasceno-Oliveira, B Levavi-Sivan, Joseph Aizen, J Gonçalves, B Fernández-Durán and J Coimbra

Marine Biology Research, Vol.10(1), pp.85-92

2014

DOI: https://doi.org/10.1080/17451000.2013.793813

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Abstract

Ecology

platichthys flesus

hydrostatic pressure

vertical migrations

gonadotropins

reproduction

Rhythmic vertical migration is a widespread feature among teleost species and the ultimate reasons for this behaviour could be as diverse as transport, feeding, predator avoidance or reproduction strategies. A rhythmic vertical migration implies that a fish will experience associated cyclic pressure changes. We examined the effect of 14-day exposure to cyclic variations in hydrostatic pressure (HP) and to elevated constant HP on pituitary levels of two types of gonadotropin, luteinizing hormone (LH) and follicle-stimulating hormone (FSH), in maturing but not ovulating female European flounder (Platichthys flesus). Fish were exposed to cyclic HP with a tidal period of 12.4 h and an amplitude of 600 kPa, between 200 and 800 kPa (environmentally realistic vertical migration), to constant absolute HP of 800 kPa, and to a maximum 1 m height water column. Flounder pituitary FSH content was remarkably higher under cyclic HP conditions than under constant normal or elevated HP conditions. In fact, pituitary FSH levels were undetectable, irrespective of the constant HP regimen. By contrast, pituitary LH levels showed no significant differences between the different groups at the end of the experimental period. This study describes an important alteration of the brain-pituitary-gonad (BPG) axis provoked by exposure to HP fluctuations, which mimic conditions in nature. The results indicate that levels of FSH in female European flounder are influenced by rhythmic vertical migrations.

Details

Title: Pituitary follicle-stimulating hormone (FSH) and luteinizing hormone (LH) levels in maturing female flounder Platichthys flesus under hydrostatic pressure simulating vertical migrations
Authors: A Damasceno-Oliveira (Author) - University of Porto, Portugal
B Levavi-Sivan (Author) - Hebrew University of Jerusalem, Israel
Joseph Aizen (Author) - Hebrew University of Jerusalem, Israel
J Gonçalves (Author) - University of Porto, Portugal
B Fernández-Durán (Author) - University of Porto, Portugal
J Coimbra (Author) - University of Porto, Portugal
Publication details: Marine Biology Research, Vol.10(1), pp.85-92
Publisher: Taylor & Francis Ltd.
Date published: 2014
DOI: 10.1080/17451000.2013.793813
ISSN: 1745-1000
Organisation Unit: University of the Sunshine Coast, Queensland; GeneCology Research Centre - Legacy; Centre for Bioinnovation
Language: English
Record Identifier: 99448638002621
Output Type: Journal article

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Web Of Science research areas: Ecology; Marine & Freshwater Biology

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