128
Egyptian Journal of Aquatic Biology & Fisheries
Zoology Department, Faculty of Science,
Ain Shams University, Cairo, Egypt.
ISSN 1110 – 6131
Vol. 25(4): … – … (2021)
www.ejabf.journals.ekb.eg
Temporal analysis of the distribution of thynnus thunnus in relation to environmental
factors along the Algerian coast
FIRAD Benyahia
1 *, Bachari NOUR EL ISLAM
2 , KHALID Amarouche
3 , GHOULAM ALLAH
Kames
4
, Lamine Salim
5 .
1 laboratory of marine and coastal ecosystems, SUPERIOR NATIONAL SCHOOL OF SEA
SCIENCES AND COASTAL PLANNING, University Campus ،Dély Ibrahim 16320, algiers, algeria,
2 Laboratory of Biological Oceanography and Marine Environment, Faculty of Biological Sciences,
University of Sciences and Technology Houari Boumediene (USTHB), BP. 32, El-Alia Bab-Ezzouar
16111, Algiers, Algeria.
3
Department of Civil Engineering, Bursa Uludağ University, Gorukle Campus, 16059 Bursa, Turkey.
4 Pelagic-ecosystem Laboratory, Faculty of Biological Sciences, University of Sciences and Technology
Houari Boumediene (USTHB), BP. 32, El-Alia Bab-Ezzouar 16111, Algiers, Algeria.
5 Department of Geography and Earth Sciences, Aberystwyth University, Aberystwyth, SY23 2DB
Wales, United Kingdom.
*
Corresponding Author: firadbenyahia@gmail.com
ARTICLE INFO
ABSTRACT
Article History:
Received: June 11,2021
Accepted: July 27,2021
Online:Oct.30,2021
_______________
Keywords:
Thunnus thynnus;
chlorophyll a, oxygen;
salinity; temperature;
Algerian coast.
The distribution of the large pelagic Atlantic bluefin tuna extends from
the North Atlantic Ocean and its adjacent seas, particularly the
Mediterranean. In this study, we integrate geo-referenced fisheries data with
remotely sensed oceanographic datasets to answer our question, what are the
environmental determinants that contribute to the temporal distribution of
bluefin tuna along the Algerian coast? This tuna-environment research has
three objectives: i) to understand the behaviour and distribution of tuna in the
face of variability in environmental factors, ii) to assist the scientist in stock
management, and iii) to assist fishermen in fishing their short-term quotas and
to assist the competent authorities in controlling the fishermen. The results of
this study Proved that the environmental factors: Temperature, Salinity,
Chlorophyll a, Current speed, Wave height, Oxygen, and Nitrate, are the
determining factors of bluefin tuna distribution along the Algerian coast.
Multiple linear regression analysis defined the equation of the best linear
correction model, chlorophyll a, dissolved oxygen, salinity and temperature
explain 70.3% of the variability in the total length of bluefin tuna.
Egyptian Journal of Aquatic Biology & Fisheries
Zoology Department, Faculty of Science,
Ain Shams University, Cairo, Egypt.
ISSN 1110 – 6131
Vol. 25(4): … – … (2021)
www.ejabf.journals.ekb.eg
Temporal analysis of the distribution of thynnus thunnus in relation to environmental
factors along the Algerian coast
FIRAD Benyahia
1 *, Bachari NOUR EL ISLAM
2 , KHALID Amarouche
3 , GHOULAM ALLAH
Kames
4
, Lamine Salim
5 .
1 laboratory of marine and coastal ecosystems, SUPERIOR NATIONAL SCHOOL OF SEA
SCIENCES AND COASTAL PLANNING, University Campus ،Dély Ibrahim 16320, algiers, algeria,
2 Laboratory of Biological Oceanography and Marine Environment, Faculty of Biological Sciences,
University of Sciences and Technology Houari Boumediene (USTHB), BP. 32, El-Alia Bab-Ezzouar
16111, Algiers, Algeria.
3
Department of Civil Engineering, Bursa Uludağ University, Gorukle Campus, 16059 Bursa, Turkey.
4 Pelagic-ecosystem Laboratory, Faculty of Biological Sciences, University of Sciences and Technology
Houari Boumediene (USTHB), BP. 32, El-Alia Bab-Ezzouar 16111, Algiers, Algeria.
5 Department of Geography and Earth Sciences, Aberystwyth University, Aberystwyth, SY23 2DB
Wales, United Kingdom.
*
Corresponding Author: firadbenyahia@gmail.com
ARTICLE INFO
ABSTRACT
Article History:
Received: June 11,2021
Accepted: July 27,2021
Online:Oct.30,2021
_______________
Keywords:
Thunnus thynnus;
chlorophyll a, oxygen;
salinity; temperature;
Algerian coast.
The distribution of the large pelagic Atlantic bluefin tuna extends from
the North Atlantic Ocean and its adjacent seas, particularly the
Mediterranean. In this study, we integrate geo-referenced fisheries data with
remotely sensed oceanographic datasets to answer our question, what are the
environmental determinants that contribute to the temporal distribution of
bluefin tuna along the Algerian coast? This tuna-environment research has
three objectives: i) to understand the behaviour and distribution of tuna in the
face of variability in environmental factors, ii) to assist the scientist in stock
management, and iii) to assist fishermen in fishing their short-term quotas and
to assist the competent authorities in controlling the fishermen. The results of
this study Proved that the environmental factors: Temperature, Salinity,
Chlorophyll a, Current speed, Wave height, Oxygen, and Nitrate, are the
determining factors of bluefin tuna distribution along the Algerian coast.
Multiple linear regression analysis defined the equation of the best linear
correction model, chlorophyll a, dissolved oxygen, salinity and temperature
explain 70.3% of the variability in the total length of bluefin tuna.