Decreasing weight-at-age of Atlantic herring (Clupea harengus) from the Baltic Sea between 1986 and 1996: a statistical analysis

Cardinale, Massimiliano; Arrhenius, Fredrik

doi:10.1006/jmsc.2000.0575

Cited by 79 publications

(72 citation statements)

References 15 publications

(29 reference statements)

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“…abundance coincided with a 50 to 60% reduction in the mean weight at age for Baltic herring between 1980 and 1997 (Cardinale & Arrhenius 2000, Möllmann et al 2005. Furthermore, the horizontal distribution of North Sea herring during summer foraging changed according to a climate-driven shift in Calanus finmarchicus distribution (Corten 2000).…”

Section: Species-specific Calanus Abundance and The Naomentioning

confidence: 92%

Recruitment of lesser sandeel Ammodytes marinus in relation to density dependence and zooplankton composition

Deurs¹,

Hal²,

Tomczak³

et al. 2009

Mar. Ecol. Prog. Ser.

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Recent recruitment failure of lesser sandeel Ammodytes marinus, a key prey fish in the North Sea, followed by several years of low spawning stock biomass, prompted us to investigate factors influencing the recruitment of this species. We tested 2 hypotheses that relate to ecological mechanisms of recruitment regulation in lesser sandeel: (1) a positive spawning stock-recruitment relationship is decoupled in years associated with high abundances of age-1 sandeels and (2) the survival success of early larvae depends specifically on the abundance of Calanus finmarchicus and not C. helgolandicus. The findings of the present study supported both hypotheses and resulted in a multiple linear recruitment model with pronounced predictive capabilities. The model includes interactions between age-1 abundance and spawning stock biomass, plus the effect of C. finmarchicus abundance, and it explained around 65% of the inter-annual variation in recruitment in contrast to only 12% by a traditional Ricker curve. We argue that early egg production in C. finmarchicus supports the survival of larvae, and that climate-generated shifts in the Calanus species composition lead to a mismatch in timing between food availability and the early life history of lesser sandeels.

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Section: Species-specific Calanus Abundance and The Naomentioning

confidence: 92%

Recruitment of lesser sandeel Ammodytes marinus in relation to density dependence and zooplankton composition

Deurs¹,

Hal²,

Tomczak³

et al. 2009

Mar. Ecol. Prog. Ser.

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“…The decrease in individual herring weight was formerly hypothesised as a major effect of either climate-related hydrographic changes (i.e. decrease in salinity, Rönnkönen et al 2004) or increased competition with the enlarged sprat Sprattus sprattus population (Cardinale & Arrhenius 2000), both negatively affecting the main planktonic food for herring.…”

Section: Introductionmentioning

confidence: 99%

Linking fisheries, trophic interactions and climate: threshold dynamics drive herring Clupea harengus growth in the central Baltic Sea

Casini¹,

Bartolino²,

Molinero³

et al. 2010

Mar. Ecol. Prog. Ser.

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How multiple stressors influence fish stock dynamics is a crucial question in ecology in general and in fisheries science in particular. Using time-series covering a 30 yr period, we show that the body growth of the central Baltic Sea herring Clupea harengus, both in terms of condition and weight-at-age (WAA), has shifted from being mainly driven by hydro-climatic forces to an interspecific density-dependent control. The shift in the mechanisms of regulation of herring growth is triggered by the abundance of sprat, the main food competitor for herring. Abundances of sprat above the threshold of ~18 × 10 10 ind. decouple herring growth from hydro-climatic factors (i.e. salinity), and become the main driver of herring growth variations. At high sprat densities, herring growth is considerably lower than at low sprat levels, regardless of the salinity conditions, indicative of hysteresis in the response of herring growth to salinity changes. The threshold dynamic accurately explains the changes in herring growth during the past 3 decades and in turn contributes to elucidate the parallel drastic drop in herring spawning stock biomass. Studying the interplay between different stressors can provide fundamental information for the management of exploited resources. The management of the central Baltic herring stock should be adaptive and take into consideration the dual response of herring growth to hydro-climatic forces and food-web structure for a sound ecosystem approach to fisheries. KEY WORDS: Condition · Weight-at-age · WAA · Ecological threshold · Inter-specific densitydependence · Hydro-climate · Herring · Sprat · Ecosystem-based fisheries management · Alternative dynamics Resale or republication not permitted without written consent of the publisher Contribution to the Theme Section 'Threshold dynamics in marine coastal systems'OPEN PEN ACCESS CCESS

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“…Nakken, 1994;Shelton et al, 1999). A dramatic example with severe socio-economic consequences is the Baltic herring (Raid andLankov, 1995, Cardinale andArrhenius, 2000), which has shown a decline in weight at age by more than 50% in all age-groups since the beginning of the 1980s (ICES, 2000a). A similar decrease has been observed for Baltic sprat, starting later (ICES, 2000a).…”

Section: Weight At Agementioning

confidence: 99%

“…Ojaveer, 1989), a shift in dominance of these different substocks has been suggested (Sparholt, 1994). Thirdly, a shortage of food supply accelerated by increasing competition with the rapidly increasing sprat stock was hypothesised (Cardinale and Arrhenius, 2000).…”

Section: Weight At Agementioning

confidence: 99%

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Scientific knowledge of biological processes potentially useful in fish stock predictions

2003

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SUMMARY: Based on an extensive review of available knowledge, several sources of information have been identified as potentially useful in fish stock predictions. They refer to a variety of biological processes of importance for stock dynamics, e.g. growth, maturation and egg production as well as early and juvenile life stage survival and subsequent recruitment, for which examples are given. Environmental variables impacting these processes were derived, ranging from simple statistical exploratory analyses to complex process studies for various stocks in different sea areas. Causal relationships are understood to varying degrees and in several cases the identified variables may only be taken as proxies for processes not investigated in detail yet. Besides the explanatory power of relevant variables, their predictability and related predictive time frames are of major importance for a potential application in stock predictions. These criteria in particular may hamper implementation in the foreseeable future in several cases. However, the information may still be highly relevant for a) hindcasting stock developments that are so far not fully understood, b) defining stock projection scenarios for simulation of different fishery management strategies under varying environmental conditions and considering species interactions and c) elucidating areas of future research to further enhance our predictive capabilities.

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Decreasing weight-at-age of Atlantic herring (Clupea harengus) from the Baltic Sea between 1986 and 1996: a statistical analysis

Cited by 79 publications

References 15 publications

Recruitment of lesser sandeel Ammodytes marinus in relation to density dependence and zooplankton composition

Recruitment of lesser sandeel Ammodytes marinus in relation to density dependence and zooplankton composition

Linking fisheries, trophic interactions and climate: threshold dynamics drive herring Clupea harengus growth in the central Baltic Sea

Scientific knowledge of biological processes potentially useful in fish stock predictions

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