Ecological commonalities among pelagic fishes: comparison of freshwater ciscoes and marine herring and sprat

Mehner, Thomas; Busch, Susan H.; Clemmesen, Catriona; Helland, Ingeborg Palm; Hölker, Franz; Ohlberger, Jan; Peck, Myron A.

doi:10.1007/s00227-012-1922-9

Cited by 7 publications

(6 citation statements)

References 169 publications

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“…Although a direct negative effect of warming on Atlantic herring is thought to be unlikely due to the broad thermal tolerance [ 60 ], and both temperatures in the experiment were in the preferred range of herring [ 37 , 61 ], a negative effect of higher temperature on survival and instantaneous growth rate was found in this study. The temperature effects detected in the first phase of the experiment on instantaneous growth rate and survival may originate from different response times in yolk utilization [ 62 ] and the switch from endogenous to exogenous feeding mode [ 60 ].…”

Section: Discussionmentioning

confidence: 76%

“…The treatments are hereafter named according to their temperature and CO 2 conditions: 10/400, 10/900, 12/400 and 12/900. The two temperature treatments are within the preferred range (8–12°C) of Atlantic herring larvae described by Mehner et al [ 37 ]. At the time of peak hatch (more than 50% of larvae hatched) the larvae were distributed randomly into plastic bags, which were lowered into the rearing tanks to allow for temperature acclimatization prior to introduction.…”

Section: Methodsmentioning

confidence: 83%

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Growth performance and survival of larval Atlantic herring, under the combined effects of elevated temperatures and CO2

et al. 2018

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In the coming decades, environmental change like warming and acidification will affect life in the ocean. While data on single stressor effects on fish are accumulating rapidly, we still know relatively little about interactive effects of multiple drivers. Of particular concern in this context are the early life stages of fish, for which direct effects of increased CO2 on growth and development have been observed. Whether these effects are further modified by elevated temperature was investigated here for the larvae of Atlantic herring (Clupea harengus), a commercially important fish species. Over a period of 32 days, larval survival, growth in size and weight, and instantaneous growth rate were assessed in a crossed experimental design of two temperatures (10°C and 12°C) with two CO2 levels (400 μatm and 900 μatm CO2) at food levels mimicking natural levels using natural prey. Elevated temperature alone led to increased swimming activity, as well as decreased survival and instantaneous growth rate (Gi). The comparatively high sensitivity to elevated temperature in this study may have been influenced by low food levels offered to the larvae. Larval size, Gi and swimming activity were not affected by CO2, indicating tolerance of this species to projected "end of the century" CO2 levels. A synergistic effect of elevated temperature and CO2 was found for larval weight, where no effect of elevated CO2 concentrations was detected in the 12°C treatment, but a negative CO2 effect was found in the 10°C treatment. Contrasting CO2 effects were found for survival between the two temperatures. Under ambient CO2 conditions survival was increased at 12°C compared to 10°C. In general, CO2 effects were minor and considered negligible compared to the effect of temperature under these mimicked natural food conditions. These findings emphasize the need to include biotic factors such as energy supply via prey availability in future studies on interactive effects of multiple stressors.

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Section: Discussionmentioning

confidence: 76%

Section: Methodsmentioning

confidence: 83%

Growth performance and survival of larval Atlantic herring, under the combined effects of elevated temperatures and CO2

et al. 2018

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“…There are also some exceptional populations within the Coregonus albula complex. Fall spawning is typical for most populations, but some populations spawn in winter or spring (Vuorinen et al 1981;Mehner et al 2010Mehner et al , 2012. These populations appear to have diverged from ancestral fall spawners, in response to intense selection pressure imposed on zygotes and juveniles by adverse winter oxygen conditions (Vuorinen et al 1981).…”

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confidence: 99%

The role of winter phenology in shaping the ecology of freshwater fish and their sensitivities to climate change

et al. 2012

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Thermal preference and performance provide the physiological frame within which fish species seek strategies to cope with the challenges raised by the low temperatures and low levels of oxygen and food that characterize winter. There are two common coping strategies: active utilization of winter conditions or simple toleration of winter conditions. The former is typical of winter specialist species with low preferred temperatures, and the latter is typical of species with higher preferred temperatures. Reproductive strategies are embodied in the phenology of spawning: the approach of winter conditions cues reproductive activity in many coldwater fish species, while the departure of winter conditions cues reproduction in many cool and warmwater fish species. This cuing system promotes temporal partitioning of the food resources available to young-of-year fish and thus supports high diversity in freshwater fish communities. If the zoogeographic distribution of a species covers a broad range of winter conditions, local populations may exhibit differences in their winter survival strategies that reflect adaptation to local conditions. Extreme winter specialists are found in shallow eutrophic lakes where long periods of ice cover cause winter oxygen levels to drop to levels that are lethal to many fish. The fish communities of these lakes are simple and composed of species that exhibit specialized adaptations for extended tolerance of very low temperatures and oxygen levels. Zoogeographic boundaries for some species may be positioned at points on the landscape where the severity of winter overwhelms the species' repertoire of winter survival strategies. Freshwater fish communities are vulnerable to many of the shifts in environmental conditions expected with climate change. Temperate and northern communities are particularly vulnerable since the repertoires of physiological and behavioural strategies that characterize many of their members have been shaped by the adverse environmental conditions (e.g. cool short summers, long cold winters) that climate change is expected to mitigate. The responses of these strategies to the rapid relaxation of the adversities that shaped them will play a significant role in the overall responses of these fish populations and their communities to climate change.

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“…For example, sympatric populations of Powan (or European whitefish) Coregonus lavaretus (Amundsen et al 2004), Lake Whitefish C. clupeaformis (Lindsey 1981;Bernatchez 2004), ciscoes Coregonus spp. (Todd and Smith 1992;Mehner et al 2012), and Arctic Char Salvelinus alpinus (Klemetsen 2010;Reist et al 2012) have evolved to occupy shallow and deep waters, as well as benthic and pelagic habitats. By comparison, the analogous diversity that occurs in North American Lake Trout S. namaycush is less well documented, and in the Laurentian Great Lakes much of that diversity has been lost.…”

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confidence: 99%

Ecomorphological Diversity of Lake Trout at Isle Royale, Lake Superior

et al. 2014

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Four Lake Trout Salvelinus namaycush morphs were identified from Isle Royale, Lake Superior; the morphs differed in shape, traits linked to feeding and locomotion, buoyancy, and physical habitat use. Lean, humper, and siscowet Lake Trout generally conformed to previous descriptions, and we report, for the first time, quantitative evidence of a fourth morph, previously described anecdotally as the “redfin.” Jackknife classification of individuals to morphs based on body shape were 94% correct. High variation within and low variation among morphs led to moderately low percent agreement among visual identifications and high uncertainty in Bayesian model groupings of morphs. Eight linear measures of phenotypic traits linked to feeding (i.e., head and eyes) and locomotion (i.e., fin lengths and caudal peduncle shape) varied among morphs, consistent with specialized adaptations for trophic and physical resource use. Habitat differed among morphs with leans being most abundant in the 0–50‐m depth stratum and siscowets most abundant in two deeper strata (50–100 and 100–150 m). Differences in capture depth and percent buoyancy reflected physical habitat and known trophic resource partitioning among morphs. While the historical fingerprint of morphological and ecological diversity in Lake Superior Lake Trout persists, it is unknown whether the contemporary low level of differentiation is due to ecological release without subsequent reorganization or to a complete breakdown of differentiation. Received July 11, 2013; accepted February 7, 2014

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Ecological commonalities among pelagic fishes: comparison of freshwater ciscoes and marine herring and sprat

Cited by 7 publications

References 169 publications

Growth performance and survival of larval Atlantic herring, under the combined effects of elevated temperatures and CO2

Growth performance and survival of larval Atlantic herring, under the combined effects of elevated temperatures and CO2

The role of winter phenology in shaping the ecology of freshwater fish and their sensitivities to climate change

Ecomorphological Diversity of Lake Trout at Isle Royale, Lake Superior

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