Biological and Hydrographic Changes in British Seas During the Last Thirty Years

Cushing, D. H.

doi:10.1111/j.1469-185x.1966.tb01491.x

Cited by 22 publications

(8 citation statements)

References 64 publications

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“…The order 6 filter gives a perhaps better elimination of noise. In addition to filtering noise, the order 2 and order 6 filters reflect 194619471948194919501951195219531954195519561957195819591960" 196119621963196419651966196719681969197019711972197319741975198019811976197719791986. (a) Intra-annual abundance of Calanus in the North Sea area C2.…”

Section: Synthetic Analysis Of the C2 Plankton Datamentioning

confidence: 99%

Year class strengths of zooplankton in the North Sea and then-relation to cod and herring abundance

Rothschild

1998

J Plankton Res

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Tune series of North Sea cod, herring and zooplankton indicated a peak in biological production in the northern North Sea in the late 1960s and early 1970s. An increased recruitment of cod corresponded with high and increasing rates of fishing mortality. During the same time, the Buchan herring increased in abundance under stable fishing mortality. A synthetic analysis of CPR Area C2 'total Calanus' and 'Paracalanus/Pseudocalanus (PP)' reflected a declining abundance in the early 1970s. An analytic analysis of time series enabled the identification of large and small year classes of Calanus and PP. Large year classes of cod appeared to require large year classes of either PP or Calanus, but not both. Large year classes of cod appeared to be more associated with large year classes of PP rather than large year classes of Calanus. Simultaneous large year classes of PP and Calanus rarely occurred. A large year class of either Calanus or PP appeared to be required to produce a large year class of cod. However, the presence of a large year class of Calanus or PP did not guarantee a large year class of cod. The biological changes in the North Sea appeared to be coupled with a difficult to define climate signal involving changes in the windfield, deep convection in the north Atlantic, the great salinity anomaly, and changes in the vertical structure of the ocean off Bermuda. 'This paper is a remembrance of John Gamble, who provided the plankton data.

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Section: Synthetic Analysis Of the C2 Plankton Datamentioning

confidence: 99%

Year class strengths of zooplankton in the North Sea and then-relation to cod and herring abundance

Rothschild

1998

J Plankton Res

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“…Many authors have assumed or hypothesized that: (1) starvation is a key determinant of recruitment; (2) during early larval development food must be highly concentrated; and (3) survival is a density-dependent function of larval density and food concentration (Blaxter & Hempel 1963, Cushing 1966, 1968, 1974a , b, Cushlng & Harris 1973, Harding & Talbot 1973, Jones 1973, Jones & Hall 1974, May 1974, Harris 1975, Lasker 1975, Arthur 1976, Hunter 1976, Nelson et al 1977, Shepherd & Cushlng 1980, Hunter 1981.…”

Section: Introductionmentioning

confidence: 99%

Short-term mortality in post-emergent arval capelin Mallotus villosus. II. Importance of food and predator density, and density-dependence

Taggart¹,

Leggett²

1987

Mar. Ecol. Prog. Ser.

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Analysis of post-emergent larval capehn Mallotus r/lllosus density in a small embayment in eastern Newfoundland durlng 1981 to 1983 demonstrated that as samphng scales approached those relevant to the larvae (ca 2 h 200 to 400 m) the degree of positive association between mlcrozooplankton and larvae decreased Forty sequential estimates of post-emergent larval mortality were not slgnlflcantly correlated wlth either the density of edible microzooplankton (90 to 130 um size-classes) the density of potential predators (chaetognaths and lellyflsh) or the density of other macrozooplankton Correlations wlth potential predator densities whlle insignificant, were positive We suggest that posltive correlations between predator denslty and mortallty are more llkely to occur when analysing fleld data that 1s collected near-instantaneously because of the near-instantaneous effect predators have on population losses relative to the longer-term cumulative effects that result from food hmltation (starvation) There was no significant relation between larval density and larval mortallty and the hypothesis of density-dependent short-term mortality in post-emergent larvae was rejected

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“…As the author believes, this phenomenon is due to extremely low water and air temperatures in winter and to the inhibiting influence of both reduced salinity and low temperatures. This suggestion is fully supported by BLEGVAD (1929), ZIEGELMEIER (1964), CRISP (1964a, b), CUSHING (1966), and by some other authors, who recorded high mortality among warm-water elements of the coastal fauna during very cold winters.…”

mentioning

confidence: 67%

Vertical and horizontal distribution of biocoenoses in the upper zones of the Japan and Okhotsk seas and their dependence on the hydrological system

Голиков

Scarlato²

1968

Sarsia

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Biological and Hydrographic Changes in British Seas During the Last Thirty Years

Cited by 22 publications

References 64 publications

Year class strengths of zooplankton in the North Sea and then-relation to cod and herring abundance

Year class strengths of zooplankton in the North Sea and then-relation to cod and herring abundance

Short-term mortality in post-emergent arval capelin Mallotus villosus. II. Importance of food and predator density, and density-dependence

Vertical and horizontal distribution of biocoenoses in the upper zones of the Japan and Okhotsk seas and their dependence on the hydrological system

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