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Registros recuperados: 4
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Biogeography of tuna and billfish communities ArchiMer
Reygondeau, Gabriel; Maury, Olivier; Beaugrand, Gregory; Fromentin, Jean-marc; Fonteneau, Alain; Cury, Philippe.
Aim The aims of this study were: (1) to identify global communities of tuna and billfish species through quantitative statistical analyses of global fisheries data; (2) to describe the spatial distribution, main environmental drivers and species composition of each community detected; and (3) to determine whether the spatial distribution of each community could be linked to the environmental conditions that affect lower trophic levels by comparing the partitions identified in this study with Longhursts biogeochemical provinces. Location The global ocean from 60 degrees S to 65 degrees N. Methods We implemented a new numerical procedure based on a hierarchical clustering method and a nonparametric probabilistic test to divide the oceanic biosphere into...
Tipo: Text Palavras-chave: Biogeochemical provinces; Global ocean; Istiophorus; Katsuwonus; Macroecology; Makaira; Marine biogeography; Tetrapturus; Thunnus; Xiphias.
Ano: 2012 URL: http://archimer.ifremer.fr/doc/00060/17141/14716.pdf
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Determining the age of tropical tunas in the Indian Ocean from otolith microstructures ArchiMer
Sardenne, Fany; Dortel, Emmanuelle; Le Croizier, Gael; Million, Julien; Labonne, Maylis; Leroy, Bruno; Bodin, Nathalie; Chassot, Emmanuel.
The Indian Ocean Tuna Tagging Program (IOTTP) provided a unique opportunity to assess the viability of estimating the age of tropical tunas from the micro-structural features of otoliths. Here, we analyzed the length measurements and micro-increment counts collected for 506 sagittal otoliths, of which 343 were chemically marked with oxytetracycline, for bigeye (Thunnus obesus), skipjack (Katsuwonus pelamis), and yellowfin tuna (Thunnus albacares). Our results show that the otoliths of tropical tunas grow more slowly than the rest of the body. Our findings confirm that both yellowfin and juvenile bigeye deposit daily increments in their otoliths, though ages are underestimated for large bigeye (>100 cm) when derived from micro-increment counts. Our...
Tipo: Text Palavras-chave: Daily age; Micro-increment; Mark-recapture; Oxytetracycline; Thunnus.
Ano: 2015 URL: https://archimer.ifremer.fr/doc/00254/36511/35082.pdf
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Essais de pêche du germon au chalut-boeuf pélagique du 31 août au 14 septembre 87 ArchiMer
George, Jean-paul.
Trials of albacore tuna fishing using pelagic pair trawling took place in the month of September 1987 with trawlers of the Lorient-Etel region. The good results obtained should make possible a renaissance of the French tuna fleet, on the decline for several years now.
Tipo: Text Palavras-chave: Fishing gear; Pair trawl; Albacore; Technique de pêche; Chalutage pélagique; Germon; Alagunga; Thunnus.
Ano: 1987 URL: http://archimer.ifremer.fr/doc/1987/rapport-2192.pdf
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Metazoan parasites of some commercially important fish along the Kenyan coast OceanDocs
Aloo, P.A.; Anam, R.O.; Mwangi, J.N..
The parasitic fauna of some commercial fish species along the Kenyan coast was investigated at four localities between August 2001 and March 2002. The study was carried out to establish the extent of parasitisation of different fish species and quantify the relationship between the parasites and their fish hosts. Fish samples were collected once a month from four landing beaches. Sixteen fish species were examined out of which only eight were infested with ecto-and endo parasites. The infested fish species included: the rabbitfish (Siganus sutor), the mackerels (Selar crumenophthalmus, Scomberomorus commerson and Rastrelliger kanarguta), parrot fish (Leptoscarus vagiensis), sardine (Sardinella gibbosa), tuna (Thunnus sp.) and needle fish (Hemiramphus far)....
Tipo: Journal Contribution Palavras-chave: Selar crumenophthalmus; Scomberomorus commerson; Rastrelliger kanarguta; Leptoscarus vagiensis; Sardinella gibbosa; Thunnus; Hemiramphus far; Sutor; Sardinella; Leptoscarus KENYA Parasites Fauna Fish species.
Ano: 2004 URL: http://hdl.handle.net/1834/1092
Registros recuperados: 4
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