INTERNATIONAL JOURNAL OF ENVIRONMENT AND GEOSCIENCES
Vol 2 No 2 (2018)

Study Of Albacore Tuna (Thunnus alalunga) Abundance Using Regional Ocean Modeling System (ROMS) Data In Indian Ocean

Dian Novianto (Marine Research Center, Indonesia Ministry of Marine Affairs and Fisheries (MMAF), Jakarta 14430, Indonesia)
Takahiro Osawa (Graduate School of Science and Engineering, Yamaguchi University, Ube Shi Tokiwadai 2-16-1, 7550092, Japan)
I Wayan Nuarsa (Graduate Study of Environmental Sciences, Udayana University, Denpasar, Bali 80232, Indonesia)



Article Info

Publish Date
01 Dec 2018

Abstract

First, we analysed alabcore catch data based on time, positions, and layer alabcore caught and ROMS result data monthly climatology data for temperature, salinity. current velocity, and sea surface height for 2005–2008. Then, we analyzed the relationship between catch data and ROMS data by combining the statistical method of regression trogh origin (RTO) and geographic information system (GIS). Three model RTO were generated with the abundance of albacore tuna as a response variable, and temperature, salinity. current velocity, and sea surface height as predictor variables. All of the predictors of temperature, salinity. current velocity, and sea surface height were highly significant (P < 0.001) to the number of albacore tuna. Values of temperature, salinity. current velocity, and sea surface height in albacore tuna preferences ranged from 220 to 230 C, 34.79 to 34.84 Psu, 0.01 to 0.03 m/s and 0.66 to 0.70 m, respectively. Validation of the predicted number ofalbacore tuna with the observed value was significant (P < 0.05, r2 = 0.60). sea surface height was the most important environmental variable to the number of albacore tuna caught, followed by temperature, salinity and current velocity.

Copyrights © 2018






Journal Info

Abbrev

ijeg

Publisher

Subject

Agriculture, Biological Sciences & Forestry Earth & Planetary Sciences Environmental Science

Description

International Journal of Environment and Geosciences (e-ISSN 2549-8878) is a peer-reviewed journal and an international scholarly refereed research journal which aims to promote the theory and practice of environmental sciences, geosciences, earth sciences, engineering and management. This journal ...