Size-dependent over-winter mortality of young-of-the-year roach, Rutilus rutilus

Kirjasniemi, Merja; Valtonen, Tapani

doi:10.1023/a:1007302931943

Cited by 46 publications

(5 citation statements)

References 16 publications

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“…Not only do smaller fish have fewer reserves than larger individuals, they burn reserves at a faster rate due to weightspecific metabolism (metabolism ∼ body weight r ; r < 1, Clarke and Johnston, 1999). Consequently, starvation risk increases with decreasing size (Oliver et al, 1979;Kirjasniemi and Valtonen, 1997;Schultz et al, 1998;Biro et al, 2004), making 0-group sandeels the most vulnerable age class. Zero-group overwinter starvation probability has likely increased in recent decades because of a decline in length (Wanless et al, 2004;van Deurs et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Exploring the Influence of Food and Temperature on North Sea Sandeels Using a New Dynamic Energy Budget Model

et al. 2018

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The zooplanktivorous schooling fish sandeels A. marinus comprise a quarter of North Sea fish biomass and are essential food for a number of marine mammals and birds. However, in recent decades there has been a decline in the abundance of older sandeels, with increased overwinter mortality proposed as a contributor. To survive winter animals require a minimum energy reserve which is determined by temperature, prey abundance, and possibly prey size. Here a new dynamic energy budget model is created to determine the influence of food and temperature on sandeel energy dynamics. The model hindcasts changes in energy and survival between 2000 and 2008, a period of pronounced stock decline in the northwestern North Sea. Overwinter starvation mortality was a large contributor toward a recent decline in sandeels in northern UK waters. Highest overwinter mortality rates were recorded for juveniles and not individuals aged 1 or over due to the effect of weight-specific metabolism. However, a sensitivity analysis of the model suggests that mortality rates are more sensitive to changes in copepod abundance in the build up to overwintering rather than temperature during overwintering. Further, projections show that temperature rises are negated by increases in large, but not small copepods. The conclusion is that food-driven size-selective starvation mortality contributed to the northwestern North Sea stock decline and that indirect food web effects of climate change are greater than direct physiological effects on sandeels.

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Section: Introductionmentioning

confidence: 99%

Exploring the Influence of Food and Temperature on North Sea Sandeels Using a New Dynamic Energy Budget Model

et al. 2018

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“…Juvenile date of birth, growth rate and condition may have implications for their successful outmigration into estuaries and for their survival during wintertime as has been shown in other fish species (e.g. Kirjasniemi & Valtonen, 1997;Munch et al, 2003;Post & Evans, 1989;Reznick et al, 2006;Schultz & Conover, 1999).…”

Section: Discussionmentioning

confidence: 99%

Seasonal reproductive allocation in landlocked Alewife Alosa pseudoharengus, in the context of niche construction and eco‐evolutionary feedbacks

Mouchlianitis

Schultz

Ganias

2022

Ecology of Freshwater Fish

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The bidirectional dynamics between species and their biotic and abiotic environments, known as eco‐evolutionary feedbacks, may shift the direction of evolution and alter the ecological role of species. Alewife, Alosa pseudoharengus, is an exemplary species to study reciprocal feedbacks between ecology and evolution, owing to repeated independent derivations of a landlocked life history from an ancestral anadromous form. In this study we analysed the reproductive allocation during the spawning season in a landlocked Alewife population in the context of eco‐evolutionary feedbacks. We also compared our findings with previous results from a neighbouring anadromous population of the species. Similarities were found between the two Alewife populations in relation to their ovarian development, oocyte release strategy and fecundity type, but also differences in seasonal patterns of energy investment. Anadromous Alewives invested more in the size of the first oocyte batch of the season and subsequently tapered their reproductive allocation, while spawning batch in landlocked Alewife was invariant as the spawning season progressed. The evolutionary change from ancestral tapering to equitability of seasonal reproductive investment can be explained with reference to eco‐evolutionary changes that occurred upon landlocking related to the availability of zooplankton prey and feeding opportunity.

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“…Notably, the term specific growth rate (SGR) is widely used in fishery literature. However, reports show that the most used formula cannot be interpreted as a per cent change in weight per unit of time and may be somewhat misleading [13,21,22]. In order to make comparisons with previously reported research, we still examined the parameter and expressed its value as SGR 2 .…”

Section: Growth Performance Experimentsmentioning

confidence: 99%

“…Water quality, habitat types, and prey behavior are all factors affecting the predation performance of LB [12]. Individual growth is one of the most vital factors related to the survival and size structure of populations [13]. Prey availability, as an environmental condition, commonly influences the intake and expenditure of energy for fish [14].…”

Section: Introductionmentioning

confidence: 99%

Predator-Prey Interactions between Nonnative Juvenile Largemouth Bass (Micropterus salmoides) and Local Candidate Prey Species in the Pearl River Delta: Predation Capacity, Preference and Growth Performance

Luo

Yang

2022

Life

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An ontogenetic dietary shift is crucial for the survival and growth of piscivorous largemouth bass (LB). However, there is much to learn about the predator-prey interaction during the switching process. We carried out a series of indoor experiments to examine the predation capacity, predation preference, and growth performance of exotic juvenile LB feeding on candidate prey species in the Pearl River Delta. The widely distributed oriental river prawn (Macrobranchium nipponense), barcheek goby (Ctenogobius giurinus), western mosquitofish (Gambusia affinis), silver carp (Hypophthalmichthys molitrix), and mud carp (Cirrhinus molitorella), with relatively similar total lengths, were selected as potential prey based on their availability and habitat use. Our results show that predation capacity and preference varied quantitatively and qualitatively among prey species. The number of oriental river prawns killed was significantly less than that of fish species, comparing the 1st hour with the 24th hour (p < 0.01). The feeding rhythm of LB varied significantly from crayfish to fish. Numerically, Jacobs’ selection index reinforced LB’s special preference for predating G. affinis. Although there were obvious variations in predation capacity and feed selection, no statistically significant growth differences were detected among LB groups feeding on live M. nipponense, G. affinis, H. molitrix, and C. molitorella (p < 0.05). These findings suggest that the successful ontogenetic dietary shift of juvenile LB may depend on the availability and vulnerability of local fish species. Further study on the reproductive phenology of potential fish prey may help to predict LB’s establishment.

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Size-dependent over-winter mortality of young-of-the-year roach, Rutilus rutilus

Cited by 46 publications

References 16 publications

Exploring the Influence of Food and Temperature on North Sea Sandeels Using a New Dynamic Energy Budget Model

Exploring the Influence of Food and Temperature on North Sea Sandeels Using a New Dynamic Energy Budget Model

Seasonal reproductive allocation in landlocked Alewife Alosa pseudoharengus, in the context of niche construction and eco‐evolutionary feedbacks

Predator-Prey Interactions between Nonnative Juvenile Largemouth Bass (Micropterus salmoides) and Local Candidate Prey Species in the Pearl River Delta: Predation Capacity, Preference and Growth Performance

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