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| Pawlowski, Lionel; Lorance, Pascal. |
| In the Northeast Atlantic fishery for roundnose grenadier Coryphaenoides rupestris, discards account for about 30% of the catch in weight. Data on discards are scarce; however, length distributions and discard rates appear to be relatively stable from year to year. In contrast, landings data available since 1990 show that the average pre-anal fin length has decreased from 20.7 cm in 1990 to 15.2 cm in 2008, resulting in a 58% reduction of the mean individual weight (850 g in 2008) and an increasing occurrence of overlapping class sizes between landings and discards in recent years. For stock assessment, the method of separable virtual population analysis (SVPA) was used. However, because of the lack of discard data for many of the years covered by the... |
| Tipo: Text |
Palavras-chave: Stock assessment; Fishing effort; Discards; Time series; Macrouridae; Coryphaenoides rupestris; Atlantic Ocean. |
| Ano: 2009 |
URL: http://archimer.ifremer.fr/doc/00000/11175/7527.pdf |
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| Geistdoerfer, Patrick. |
| This paper is a study of the feeding ecology of Macrouridae. After Data on their taxonomy and on the stomach contents, the author gives the results obtained: coefficient of vacuity, indication of a prey frequency, percentage in number and in weight, the mean number of prey per stomach, the mean weight of the prey, the alimentary coefficient of a prey. The diet of every species of Macrouridae and the characteristics of feeding in these species are described. He concludes with considerations on the Macrouridae in the ocean and their geographical distribution, and on the deep feeding chain, especially the trophic role of different groups of preys. It is thought that, in the Macrouridae, the alimentary diet is little specialized, and based on benthic and... |
| Tipo: Text |
Palavras-chave: Macrouridae; Stomach content; Feeding behaviour. |
| Ano: 1978 |
URL: http://archimer.ifremer.fr/doc/1978/publication-1957.pdf |
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| This survey focused on the outer shelf and deep water slope off Ghana and the catch-distribution analyses were therefore performed for four depth strata, outer shelf (< 100 m), upper slope (100-300 m) mid slope (300-600 m) and lower slope (>600 m). In the analyses the “Demersal” group includes commercially important families as Sciaenidae, Haemulidae (=Pomadasyidae), Serranidae, Sparidae and Lutjanidae, and especially in deeper waters the Merluccidae, Macrouridae and Moridae. The Pelagic group includes Engraulidae, Clupeidae, Carangidae, Scombridae, Sphyraenidae, Gempylidae and Trichiuridae (the latter family is actually mainly benthopelagic). For the analysis the “other” group includes all species not accounted for in the groups listed. |
| Tipo: Report |
Palavras-chave: Demersal fish; Zooplankton; Distribution; Pelagic fish; Lutjanidae; Macrouridae. |
| Ano: 2010 |
URL: http://hdl.handle.net/1834/4996 |
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