|Larval stages of Pandalus borealis|
|Rasmussen, T.; Aschan, M. (2011). Larval stages of Pandalus borealis. Mar. Biol. Res. 7(2): 109-121. dx.doi.org/10.1080/17451001003764004|
|In: Marine Biology Research. Taylor & Francis: Oslo. ISSN 1745-1000, more|
Animal morphology; Biological development; Identification; Pandalus borealis Krøyer, 1838 [WoRMS]; Marine
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Our studies of larval growth of Pandalus borealis revealed that the available literature for identification of the larval stages was inconsistent and thereby difficult to use. We present a robust key for identification of larval stages of P. borealis, that separates the five zoea stages (ZI-ZV), one megalopa stage (M) and the post-larva (P) in the North Atlantic. Through extensive morphometric measurements and analysis we have developed this key for the identification of larval stages that will serve as a helpful tool in future P. borealis larvae research. The key is based on the functional development of the larvae with emphasis on the telson shape, and on distinct morphological characteristics in each stage. We studied live and preserved larvae, both reared and wild caught, originating from North Norwegian fjords and the Barents Sea. The literature study suggests differences, in morphology and size, between larval stages for the Atlantic (P. borealis) and the Pacific (P. eous) species or subspecies.