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Population structure and reproductive patterns of the NW Mediterranean deep-sea macrourid Trachyrincus scabrus (Rafinesque, 1810)

AuthorsFernandez-Arcaya, U. ; Recasens, Laura ; Murua, Hilario; Ramírez-Llodra, Eva ; Rotllant, Guiomar ; Company, Joan B.
KeywordsTrachyrincus scabrus
Population structure
Reproductive biology
NW Mediterranean
Issue DateSep-2012
CitationMarine Biology 159(9): 1885-1896 (2012)
AbstractMacrourid fish are one of the most abundant marine species on continental margins worldwide. Although they play an important role in the ecosystem, little is known about their overall biology. We report here a large data set of the most abundant macrourid in Mediterranean waters, Trachyrincus scabrus, showing the main population and reproductive characteristics. The study was based on 3,239 specimens collected between 300 and 1,500 m depth on the northwestern Mediterranean in 2003–2004 and 2008–2009. The population showed a depth-related structure with the largest individuals at 1,100 m depth and the smallest (i.e., immature) at shallower depths. Macroscopic and microscopic analyses of the gonads showed that T. scabrus has a highly seasonal reproductive pattern. Spawning females were found during winter when the organic matter fluxes were highest on the continental slope. T. scabrus is a batch spawner with group-synchronous oocyte development and present low average fecundity of 14,191 oocytes
Description12 pages, 10 figures, 6 tables
Publisher version (URL)http://dx.doi.org/10.1007/s00227-012-1976-8
Appears in Collections:(ICM) Artículos
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