Diel Vertical Migration of <i>Pandalus borealis</i> in Kachemak Bay, Alaska

Barr, Louis

doi:10.1139/f70-071

Cited by 25 publications

(14 citation statements)

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“…Furthermore, pollock selectively fed upon the euphausiid Thysanoessa spinifera in August, while the shrimp Pandalus borealis was the primary component of the diet in November (Adams et al 2007). Euphausiids typically migrate to the surface at night (Brinton et al 2000) while shrimp DVM, if it occurs, is diffuse throughout the water column (Barr 1970).…”

Section: Discussionmentioning

confidence: 99%

Seasonal changes in the diel vertical migration of walleye pollock (Theragra chalcogramma) in the northern Gulf of Alaska

et al. 2009

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Walleye pollock (Theragra chalcogramma) perform diel vertical migration (DVM) as juveniles, but have an increasing tendency to be associated with the bottom with age. We studied the DVM of a local population of adult pollock in the northern Gulf of Alaska in August and November 2003. There was no relationship between the depth of pollock and the isolume (line of equal light intensity) necessary for visual foraging in August. Pollock passed through the thermocline at this time. In November there was a significant relationship between pollock biomass above/below the 200 m isobath and the isolume necessary for visual foraging. It is hypothesized that in August pollock ignore the isolume and thermocline, simply tracking the movements of their prey (euphausiids) to feed upon them near the surface at night. In November, relatively denser pollock shoals migrate up and down with the isolume necessary for visual foraging to feed on decapods.

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Section: Discussionmentioning

confidence: 99%

Seasonal changes in the diel vertical migration of walleye pollock (Theragra chalcogramma) in the northern Gulf of Alaska

et al. 2009

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“…In Fortune Bay, suprabenthic animals were mostly collected in pelagic trawls5at night or in deeper daytime collections. Diel migrations are known to occur in mysids (FOSSA 1985;KAARTVEDT 1985KAARTVEDT , 1989, amphipods (SAINTE-MARIE & BRUNEL 1985;KAARTVEDT 1986), cumaceans (KAARTVEDT 1986) and decapod shrimp (BARR & McBRIDE 1967;BARR 1970;ApOLLONIO &-al. 1986).…”

Section: Discussionmentioning

confidence: 99%

A comparison of the macrozooplankton faunas in two newfoundland fjords differing in physical oceanography

Richard

Haedrich

1991

Sarsia

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HAEDRICH 1991 0710. A comparison of the macrozooplankton faunas in two Newfoundland fjords differing in physical oceanography. -Sarsia 76:41-52. Bergen. ISSN 0036-4827.The macrozooplankton faunas were compared between two Newfoundland fjords containing predominantly different deep-water masses; Bay d'Espoir contains warm, saline, Modified Slope Water while Fortune Bay contains cold, low-salinity, Labrador Current Water. Samples were collected in May 1982 and June 1983 using a 3-m Isaacs-Kidd Midwater Trawl. Data are presented on the species composition, relative abundance and vertical distribution of macrozooplankton. The fauna in both fjords consisted largely of the euphausiids Thysanoessa raschii, Thysanoessa inermis, Meganyctiphanes norvegica and the chaetognath Sagitta elegans. Eleven species occurred only in Fortune Bay while nine species occured only in Bay d'Espoir. Twenty species were common to the fjord faunas although eight of these occurred in low numbers. Catch rates were significantly different between fjords for eight species, but not for four species including T. raschii the most abundant species in both fjords. Differences in species composition and relative abundance could be attributed, in part, to the differing deep-water properties of the fjords. However, bottom depth and substrate type appeared to be important for some species.

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“…Smaller individuals are subject to the sigmoid net retention function. Sampling was done only during daytime because of vertical migrations of the shrimps off the bottom at night ( Barr 1970;Apollonio et al 1986). …”

Section: --mentioning

confidence: 99%

Variability, Spatial Patterns and Scales of Similarity in Size–Frequency Distributions of the Northern Shrimp (Pandalus borealis) and its Migrations in the Gulf of St. Lawrence

Simard¹,

Savard²

1990

Can. J. Fish. Aquat. Sci.

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Simard, Y., and L. Savard. 1990. Variability, spatial patterns and scales of similarity in size-frequency distributions of the northern shrimp (Pandalus borealis) and its migrations in the Gulf of St. Lawrence. Can. 1. Fish.Aquat. Sci. 47: 794-804.The causes of high variability of length-frequency distributions (LFDs) of the northern shrimp in the Gulf of St. Lawerence were investigated with spatial statistics. The LFD is considered as a multivariate whose spatial structure was analyzed with cluster analysis, dissimilarity variograms and multivariate correlograms. Data were collected in 1984Data were collected in , 1985Data were collected in , and 1987 on the three main shrimp grounds: Sept-lles, North-Anticosti, and Esquiman. The LFDs were spatially autocorrelated over a wide range of scales, and well-defined homogeneous assemblages were observed in each region every year. The autocorrelation signature revealed that the spatial organization resulted from large gradients, partially related to the topography of the shrimp grounds, which probably resulted from the ontogenic depth-migration of the shrimps. The specific mean length of cohorts consistently increased along the spatial gradients, up to about one-half of the annual growth increment. This was attributed to the fact that the migration routes passed through an increasing temperature gradient, which, directly or indirectly, accelerated their growth. Significant regional and interannual differences in the relative proportion of the modal components of LFDs were noted, and were ascribed to fluctuations in the success and distribution of recruitment and survivorship.Les causes de la forte variabilite des distributions de frequence de longueur (DFLs) chez la crevette nordique du Golfe du Saint-Laurent sont etudikes 21 I'aide de statistique spatiales. Les DFLs sont considerees cornme une multivariable dont on 6tudie la structure spatiale au moyen de groupements hikrarchiques, de variogrammes de dissimilarit6 et de corr6logrammes multivariables. Les donnees ont 6t6 recoltees en 1984, 1985, et 1987 dans les trois principales regions de p@che: Sept-lles, Nord-Anticosti, et Esquiman. Les DFLs etaient toujours autocorrelkes suivant un large continuum d'echelles spatiales, et des assemblages homogPnes bien definis ont kt6 observees chaque annee dans chacune des trois regions. La forme d'autocorrelation indiquait que I'organisation spatiale provenait de large gradients, modules par la topographie des regions. Ces gradients resultaient vraisemblablernent de la migration ontogenique des crevettes vers les fonds plus profonds. Les longueur moyennes spkcifiques des cohortes ont montr6 un accroissement systkmatique le long des gradients spatiaux, representant jusqulA la moiti6 de la croissance annuelle. Ceci fut attribue au fait que les routes migratoires croisaient un gradient positif de temp&ature, qui accel&ait, directement ou indirectement, leur croissance. Des differences regionales et interannnuelles considerables de la proportion relative des modes composant les...

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Diel Vertical Migration of Pandalus borealis in Kachemak Bay, Alaska

Cited by 25 publications

References 1 publication

Seasonal changes in the diel vertical migration of walleye pollock (Theragra chalcogramma) in the northern Gulf of Alaska

Seasonal changes in the diel vertical migration of walleye pollock (Theragra chalcogramma) in the northern Gulf of Alaska

A comparison of the macrozooplankton faunas in two newfoundland fjords differing in physical oceanography

Variability, Spatial Patterns and Scales of Similarity in Size–Frequency Distributions of the Northern Shrimp (Pandalus borealis) and its Migrations in the Gulf of St. Lawrence

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