Aquat. Living Resour.
Volume 30, 2017
|Number of page(s)
|08 August 2017
Sex differentiation in the histology of the digestive gland of Nephrops norvegicus from Pagasitikos Gulf during spring
Department of Ichthyology and Aquatic Environment, School of Agricultural Sciences, University of Thessaly,
N. Ionia Magnisias, Greece
* Corresponding author: email@example.com
Handling Editor: George Katselis
Accepted: 9 June 2017
The aim of this research is to study the seasonal histological changes in the digestive gland of males and females Nephrops norvegicus at the Pagasitikos Gulf. The food availability in Pagasitikos Gulf varies and depends on the seasonality, physicochemical conditions and diversification of organic material. After obtaining histological sections, the size of tubules, their lumens and the R-, F- and B-cells were calculated in March and May. A special image analysis algorithm was used that can automatically calculate both the above area ratios using digestive gland histological sections. Both male and female, which were sampled in May, had a larger density of lipid droplets than N. norvegicus sampled in March. However, females sampled in May had more lipid droplets per tubule and a smaller F-cell-to-tubule ratio than males, which indicated that the intensive feeding period had started for reproduction in the females. The digestive gland can be used as a nutritional indicator to assess the nutritional status of Nephrops stocks and to assist with the management of the Nephrops wild stocks by proposing a seasonal fishery management plan to improve the sustainability of the stocks.
Key words: Nephrops norvegicus / Digestive gland / R-cells / B-cells / F-cells
© EDP Sciences 2017
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.