Biology of the shrimp Oplophorus spinosus (Brullé, 1839) (Decapoda, Oplophoridae) in the continental slope waters of the coast of northwest Africa

in Crustaceana
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The size-sex structure and reproduction of the pelagic shrimp Oplophorus spinosus (Brullé, 1839) in the northwestern African continental slope is described herein. A total of 175 males and 53 females were caught by pelagic and bottom trawls at depths of 354-913 m in October-May 2003-2005. Total body length (TL) was 20-55.5 mm in males and 28.5-54 mm in females. Female TL at first maturity was 31 mm, the TL of ovigerous females ranged from 39.5-54 mm. Fecundity varied from 5 to 25 eggs with an outer diameter of 3.21 ± 0.19 mm at the beginning of embryogenesis and 3.14 ± 0.16 mm at half-time. O. spinosus has a continuous spawning period with a possible peak in spring. Its main reproductive traits are similar to those of this species from the Pacific and are comparable with the other species of this genus. In general, Oplophorus spp. are typical K-strategists with large-sized eggs and low fecundity.

Biology of the shrimp Oplophorus spinosus (Brullé, 1839) (Decapoda, Oplophoridae) in the continental slope waters of the coast of northwest Africa

in Crustaceana

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References

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Figures

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    Location of sampling stations of Oplophorus spinosus (Brullé, 1839) on the northwestern African continental slope.

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    The male and female size composition of Oplophorus spinosus (Brullé, 1839) in northwestern African waters. Numerals in columns indicate number of studied specimens in each size group.

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    Size composition of ovigerous (EDS 1-3) and non-ovigerous females of Oplophorus spinosus (Brullé, 1839) with ovaries in different maturity stages (OMS II—VI-II) (% of all studied females). Numbers in columns indicate number of specimens studied in each category.

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    Relationship between fecundity of Oplophorus spinosus (Brullé, 1839) females with embryos in EDS 1 and their TL. Numbers near symbols indicate fecundity value.

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