Biology and meso-scale distribution patterns of North Sea cephalopods

Oesterwind, Daniel; Hofstede, R. ter; Harley, B.F.M.; Brendelberger, Heinz; Piatkowski, Uwe

doi:10.1016/j.fishres.2010.06.003

Cited by 23 publications

(46 citation statements)

References 26 publications

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“…As seasonal movements of migratory cephalopods are related to the seasonal cycle of environmental oscillation (see Pierce et al 2008), we can expect that a population of S. atlantica in an inshore zone which is characterized by seasonal changes could, affect the variability in abundance which is mediated by environmental conditions. The relatively low values of abundance found in Areamilla in summer agrees with the results of Oesterwind et al (2010), who collected S. atlantica in the North Sea mainly in winter months using bottom trawl surveys. These results are also in agreement with the low abundance of Idiosepius pygmaeus during summer (Jackson 1992).…”

Section: Discussionsupporting

confidence: 88%

“…This approach was adopted in the present study. As population abundance can fluctuate over several orders of magnitude between different locations for the same species (Boletzky 1989;Oesterwind et al 2010), it is interesting to verify whether we can observe differences in population abundance on a small scale. The main aim of this work was to gain a better understanding of the changes in abundance of S. atlantica from two different depth zones at Areamilla beach (Ría de Vigo, NE Atlantic) using SCUBA dive, testing the hypothesis that its abundance varies through the seasons.…”

Section: Introductionmentioning

confidence: 99%

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Seasonal abundance of the Atlantic bobtail squidSepiola atlanticain Galician waters (NE Atlantic)

Rodrigues

Garci

Troncoso

et al. 2011

Marine Biology Research

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The abundance of the bobtail squid Sepiola atlantica was assessed for Areamilla beach at Ría de Vigo. Sampling was carried out monthly and simultaneously by two scuba divers at two sandy submersed zones between December 2007 and November 2009. A total of 505 specimens of S. atlantica (204 juveniles, 149 males and 152 females) were collected. The mean annual abundance of the species was 0.0190.01 ind.. Abundances were not significantly different between the two depth zones for each year, nor for seasons. However, total abundance was significantly different between seasons. Abundance showed a seasonal pattern with the lowest values in summer. For each season populations were formed by specimens of different size during the two sampling years, as well in both depth zones. Spawning occurs throughout the year. Two peaks of recruitment, one in summer and another in autumn, were observed. Whether seasonal differences in abundance are due to migration of the individuals from shallow to deeper zones related to changes in bottom temperature is discussed.

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Section: Discussionsupporting

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Seasonal abundance of the Atlantic bobtail squidSepiola atlanticain Galician waters (NE Atlantic)

Rodrigues

Garci

Troncoso

et al. 2011

Marine Biology Research

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“…Recent reviews of cephalopods have been compiled and provide a wealth of information on their distribution and interaction with the environment in European Seas, but they are largely focused on groups other than Ommastrephidae, such as longfin squid (Loliginidae), cuttlefish and octopods (e.g. Pierce et al 2008Pierce et al , 2010Hastie et al 2009;Oesterwind et al 2010).…”

Section: Introductionmentioning

confidence: 99%

“…Joy (1990) and Wiborg (e.g. Wiborg & Beck 1984) studied the fishery biology of the European flying squid Todarodes sagittatus (Lamarck, 1798) from samples caught in Shetland and adjacent waters; Hastie et al (1994) investigated the reproductive biology of the lesser flying squid Todaropsis eblanae (Ball, 1841) from the bycatch of commercial fishing boats in Shetland waters and off Aberdeen; and some notes on the distribution and biology of T. sagittatus, T. eblanae and the broadtail shortfin squid Illex coindetii (Vérany, 1839) were given by De Heij & Baayen (2005) and Oesterwind et al (2010) in their studies of North Sea cephalopods. The only direct study on an ommastrephid North Sea squid focused on the biology of T. eblanae and was based on cephalopod samples taken during 10 cruises during the course of the ICES International Bottom Trawl Survey (IBTS) with the FRV 'Walther Herwig III' (Zumholz & Piatkowski 2005).…”

Section: Introductionmentioning

confidence: 99%

On distribution, size and maturity of shortfin squids (Cephalopoda, Ommastrephidae) in the North Sea

Oesterwind

Piatkowski

Brendelberger

2014

Marine Biology Research

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Cephalopods are important predators and key organisms in numerous marine ecosystems, but their abundance in the North Sea, one of the most productive shelf seas, seems to be low. Here we report on three Ommastrephidae (Illex coindetii, Todarodes sagittatus, and Todaropsis eblanae) that have been caught on several North Sea cruises between 2007 and 2010. T. eblanae was most abundant (n = 269 specimens), followed by I. coindetii (n = 95) and T. sagittatus (n = 51). We provide new information on their distribution patterns for summer and winter and relate the species abundances to sampling depth, temperature and salinity. Further information is given on the species size, distributions, maturation and possible spawning sites and times in the North Sea. Although occurring in relatively low numbers, our study suggests that Ommastrephidae are distributed throughout most parts of the northern and central North Sea, underpinning their constancy and potential influence on the ecosystem.

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“…But there are no publications about the northern part of the North Sea. The study by Oesterwind et al (2010) provides new information on meso-scale distribution patterns and recruitment areas of North Sea squids. This study examines the cephalopod by-catch in winter and summer of the International Bottom Trawl Survey (IBTS) coordinated by the International Council for Explorations of the Sea (ICES).…”

Section: Mesoscale Distribution Patternsmentioning

confidence: 99%