scholarly journals High levels of halogenated natural products in large pelagic fish from the Western Indian Ocean

2021 ◽  
Author(s):  
Qiong Wu ◽  
Catherine Munschy ◽  
Yann Aminot ◽  
Nathalie Bodin ◽  
Walter Vetter
Keyword(s):  
Natural Products ◽  
Indian Ocean ◽  
Fish Species ◽  
Western Indian Ocean ◽  
Pelagic Fish ◽  
Negative Ion ◽  
Selected Ion Monitoring ◽  
Negative Ion Mass Spectrometry ◽  
Halogenated Natural Products ◽  
Tropical Tuna

AbstractConcentrations, profiles and muscle-liver distribution of halogenated natural products (HNPs) and anthropogenic persistent organic pollutants (POPs) were investigated in five large pelagic fish species and one smaller planktivore fish species from the Western Indian Ocean. Analysis of swordfish muscle from the Seychelles revealed the predominance of HNPs, with the highest concentrations found for 2′-methoxy-2,3′,4,5′- tetraBDE (2′-MeO-BDE 68 or BC-2), 6-methoxy-2,2′,4,4′- tetraBDE (6-MeO-BDE 47 or BC-3) and 2,3,3′,4,4′,5,5′-heptachloro-1′-methyl-1,2′-bipyrrole (Q1), along with varied contributions of further HNPs. The mean concentration of ∑HNPs (330 ng/g lw) was one or two orders of magnitude higher than ∑DDTs (60 ng/g lw) and ∑PCBs (6.8 ng/g lw). HNPs (BC-2, BC-3 and Q1) were also predominant in individual samples of three tropical tuna species from the Seychelles and from other regions of the Western Indian Ocean (Mozambique Channel, off Somalia and Chagos Archipelago). Non-targeted gas chromatography coupled with electron capture negative ion mass spectrometry operated in the selected ion monitoring mode (GC/ECNI-MS-SIM) analysis of one swordfish sample indicated low abundance of rarely reported HNPs (three hexachloro-1′-methyl-1,2′-bipyrrole (Cl6-MBP) isomers and pentabromo-1,1′-dimethyl-2,2′-bipyrroles (Br5-DBP)) but no further abundant unscreened polyhalogenated compounds.

scholarly journals Bioaccumulation of trace elements in pelagic fish from the Western Indian Ocean

2007 ◽  
Vol 146 (2) ◽  
pp. 548-566 ◽  
Author(s):  
Jessica Kojadinovic ◽  
Michel Potier ◽  
Matthieu Le Corre ◽  
Richard P. Cosson ◽  
Paco Bustamante
Keyword(s):  
Trace Elements ◽  
Indian Ocean ◽  
Western Indian Ocean ◽  
Pelagic Fish

scholarly journals Mercury content in commercial pelagic fish and its risk assessment in the Western Indian Ocean

2006 ◽  
Vol 366 (2-3) ◽  
pp. 688-700 ◽  
Author(s):  
Jessica Kojadinovic ◽  
Michel Potier ◽  
Matthieu Le Corre ◽  
Richard P. Cosson ◽  
Paco Bustamante
Keyword(s):  
Risk Assessment ◽  
Indian Ocean ◽  
Western Indian Ocean ◽  
Mercury Content ◽  
Pelagic Fish

scholarly journals Fish behaviour from fishers’ knowledge: the case study of tropical tuna around drifting fish aggregating devices (DFADs)

2007 ◽  
Vol 64 (11) ◽  
pp. 1517-1528 ◽  
Author(s):  
Gala Moreno ◽  
Laurent Dagorn ◽  
Gorka Sancho ◽  
David Itano
Keyword(s):  
Indian Ocean ◽  
Local Ecological Knowledge ◽  
Western Indian Ocean ◽  
Future Research ◽  
Ecological Knowledge ◽  
Fish Behaviour ◽  
Planning And Design ◽  
Tropical Tuna ◽  
Fish Aggregating Devices

Purse-seining for tropical tuna is one of the most technologically advanced fisheries in the world. The purpose of this study was to apply local ecological knowledge (LEK) to assist in the planning of future in situ studies of fish behaviour around drifting fish aggregating devices (DFADs) by prioritizing research topics, thereby reducing the number of potential hypotheses to explore. Interviews of fishing masters of the purse-seine fleets working in the western Indian Ocean provided an alternate, independent, and previously unexplored source of behavioural information, specifically on the attraction, retention, and departure behaviours of tuna schools in relation to DFADs. Most fishing masters agreed that the maximum attraction distance of a DFAD is approximately 10 km and generally agreed to the following statements. Tuna form distinct schools under FADs, commonly segregated by species and size. The main reasons for the departure of tuna aggregations from FADs are changes in currents or FAD movements and location in relation to physical or oceanographic features. The number of actively monitored DFADs at sea in the western Indian Ocean was estimated at approximately 2100. Incorporating fishers into the planning and design stages of future research projects will facilitate collaborative and integrated approaches.

scholarly journals First distributional record of sixteen Coral associated fish species from Saint Martin’s island, Bangladesh

2021 ◽  
Vol 48 (2) ◽  
pp. 263-288
Author(s):  
Shilpi Saha ◽  
Shamsunnahar ◽  
Subrina Sehrin ◽  
Anirban Sarker ◽  
Kazi Ahsan Habib ◽  
...  
Keyword(s):  
Indian Ocean ◽  
Fish Species ◽  
Bay Of Bengal ◽  
Western Indian Ocean ◽  
Landing Zone ◽  
Morphological Studies ◽  
The Family ◽  
First Occurrence ◽  
Reef Fish Species ◽  
First Time

The Bangladeshi reef fish species have not been studied thoroughly. An attempt has been made for taxonomic identification of coral-associated fish through morphological studies. Mostly dead and few live fishes were collected from local fishermen, fish landing zone, and fish markets in St. Martin’s Island, Bay of Bengal, Bangladesh, from October 2015 to July 2016, visiting seven times. Samples were also obtained from local boys who collected fishes by using hook and line. The study recorded the first occurrence of 16 coral-associated fish species such as Caesio cuning, Lethrinus ornatus, Upeneus suahelicus, Upeneus asymmetricus, Scarus taeniopterus, Scarus zufar, Bodianus neilli, Parapercis clathrata, Parapercis diplospilus, Pomadasys furcatus, Siganus fuscescens, Acanthopagrus berda, Gerres erythrourus, Lagocephalus spadiceus, Psettodes bennettii, and Heteroconger perissodon. Among them, Parapercis clathrata, Parapercis diplospilus belongs to the family Pinguipedidae before, no species was recorded under this family from Bangladesh and a rare and endemic species, Scarus zufar, of the Arabian Sea off Dhofar (Zufar), Oman in the Western Indian Ocean, was recorded for the first time in the Northern Indian Ocean in the northeastern part of Bay of Bengal. This study increased the number of coral-associated fish from 240 to 256 species and the number of families from 54 to 55 in the coral reef ecosystem of the Bay of Bengal, Bangladesh. Bangladesh J. Zool. 48(2): 263-288, 2020

scholarly journals Trophic niches of sympatric tropical tuna in the Western Indian Ocean inferred by stable isotopes and neutral fatty acids

2016 ◽  
Vol 146 ◽  
pp. 75-88 ◽  
Author(s):  
Fany Sardenne ◽  
Nathalie Bodin ◽  
Emmanuel Chassot ◽  
Aurélien Amiel ◽  
Edwin Fouché ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Stable Isotopes ◽  
Indian Ocean ◽  
Western Indian Ocean ◽  
Tropical Tuna ◽  
Trophic Niches
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