Forage fauna in the diet of bigeye tuna (Thunnus obesus) in the western tropical Atlantic Ocean
نویسندگان
چکیده
منابع مشابه
Age and growth of the bigeye tuna, Thunnus obesus, in the western Pacifi c Ocean
Bigeye tuna (Thunnus obesus Lowe, 1839) are a commercially important species of tuna inhabiting the warm waters of the Atlantic, Indian, and Pacifi c oceans. They are found across the entire Pacifi c between northern Japan and North Island of New Zealand in the west and from 40°N to 30°S in the east (Calkins, 1980; Matsumoto, 1998). Adult bigeye tuna are caught mainly by longlines, but substant...
متن کاملGrowth and mortality rates of bigeye tuna Thunnus obesus (Perciformes: Scombridae) in the central Atlantic Ocean.
Age and growth parameters were estimated for bigeye tuna Thunnus obesus Lowe, 1839 sampled from China longline fisheries in the central Atlantic Ocean from October 2002 to July 2003 and from August 2004 to March 2005. The von Bertalanffy growth parameters were estimated at L(infinity)=217.9 cm fork length, k=0.23 year(-1), and t(0)=-0.44 year. The total mortality rate (Z) was estimated to be fr...
متن کاملSpatiotemporal variability in bigeye tuna (Thunnus obesus) dive behavior in the central North Pacific Ocean
0079-6611/$ see front matter Published by Elsevier doi:10.1016/j.pocean.2010.04.013 * Corresponding author. Tel.: +1 808 983 5306. E-mail address: [email protected] (E.A. Howe Data from 29 pop-up archival transmission (PAT) tags deployed on commercial-size bigeye tuna (Thunnus obesus) in the central North Pacific Ocean from 4 N to 32 N were analyzed to describe variability in their dive beha...
متن کاملDistribution Modeling of Bigeye Tuna (Thunnus obesus Lowe, 1839), Using Satellite Derived Environmental Variables in Indian Ocean
Understanding effects of environment on the distribution of economic fish is a fundamental step in the ecosystem-based management and ultimately a standard approach in management policies. Bigeye tuna (Thunnus obesus) is one of the most important aquatic species harvested in the Indian Ocean. The present study investigated the association of different variables effecting the rate of catch and d...
متن کاملGenetic diversity and historical demography of Atlantic bigeye tuna (Thunnus obesus).
Bigeye (Thunnus obesus) is a large, pelagic, and migratory species of tuna that inhabits tropical and temperate marine waters worldwide. Previous studies based on mitochondrial RFLP data have shown that bigeye tunas from the Atlantic Ocean are the most interesting from a genetic point of view. Two highly divergent mitochondrial haplotype clades (I and II) coexist in the Atlantic Ocean. One is a...
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ژورنال
عنوان ژورنال: Brazilian Journal of Oceanography
سال: 2012
ISSN: 1679-8759
DOI: 10.1590/s1679-87592012000100009