Gamete and larval collection methods and hatchery rearing environments affect levels of genetic diversity in early life stages of lake sturgeon (Acipenser fulvescens)

Crossman, James A.; Scribner, Kim T.; Yên, Dương Thúy; Davis, Courtney L.; Forsythe, Patrick S.; Baker, E. A.

doi:10.1016/j.aquaculture.2010.10.033

Cited by 48 publications

(43 citation statements)

References 71 publications

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“…These environments have also been demonstrated as increasing phenotypic variability and genetic diversity at critical early life history stages (e.g., eggs, larvae, and juveniles) relative to more traditional hatchery environments, an effect attributed to rearing conditions (temperature, nutrients, odorants, etc.) that are more reflective of the natural environment (Crossman, Scribner, Duong, et al., ; Crossman, Scribner, Forsythe, et al., ). Despite these differences, in the experiments reported here we observed no significant results attributed to the different hatchery rearing environments (streamside vs. traditional).…”

Section: Discussionmentioning

confidence: 99%

“…This density of sturgeon (10.7 sturgeon/m 3 ) is considered high compared to what might occur in nature for this age of sturgeon based on catch results from studies conducted on this age class (Benson, Sutton, Elliott, & Meronek, ; Caroffino et al., ). However, releases of hatchery fish occur in large numbers and sturgeon tend to remain in larger groups immediately following release (Crossman, Scribner, Duong, et al., ), when the majority of predation likely occurs. Juvenile lake sturgeon were introduced into tanks without a predator.…”

Section: Methodsmentioning

confidence: 99%

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Lethal and non-lethal effects of predation by native fish and an invasive crayfish on hatchery-reared age-0 lake sturgeon (Acipenser fulvescensRafinesque, 1817)

et al. 2017

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Summary The objective was to investigate the effects of two native fish predators (adult rock bass Ambloplites rupestris, and smallmouth bass Micropterus dolomieue) and an invasive benthic crayfish (Orconectes rusticus) on habitat choice and survival of hatchery‐reared age‐0 lake sturgeon (Acipenser fulvescens). Three length‐classes (mean total length ± 1 SD) of 68.4 ± 12.7 cm, 85.9 ± 15.0, and 111.6 ± 15.4 cm corresponding to 8–9, 11–13, and 15–16 weeks of age, respectively, were examined. Experiments were conducted in a circular (2.44 m diameter, 0.6 m deep) fiberglass tank divided into two equal sections (volume of each section: 2.81 m3). Each section included three contiguous and equal sized substrate types [sand, small gravel (4–10 mm diameter), and cobbles (30–50 mm diameter)] along with the water column providing a choice of habitats. Survival and substrate choice were quantified with and without predators over 24 hr with 30 sturgeon per trial. Multiple trials were repeated for each length‐class and predator type. Survival was also evaluated when alternate prey (emerald shiners Notropis atherinoides) were present in equal numbers (n = 15 per trial). Sturgeon used sand in the absence of a predator or in the presence of fish predators, but in the presence of crayfish the water column (58 ± 5%) was used in increasingly higher proportions by the end of the trial. Survival was significantly lower for sturgeon exposed to crayfish (54%) compared to all other fish predators (97%). Fish predators consumed significantly more alternate prey (32%) than sturgeon (0%) while crayfish consumed significantly more sturgeon (35%) compared to alternate prey (0%). Results demonstrate that non‐lethal effects may contribute to higher rates of mortality between alternate predator types through predator‐induced occupancy of non‐preferred habitats.

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Lethal and non-lethal effects of predation by native fish and an invasive crayfish on hatchery-reared age-0 lake sturgeon (Acipenser fulvescensRafinesque, 1817)

et al. 2017

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“…Large body size was negatively correlated with timing of movements across all ages, indicating that survival may be enhanced by releasing individuals at night. In a follow-up study, Crossman et al (2011b) tested offspring produced from direct gamete takes and found less diversity than occurred in offspring produced from collections of naturally produced eggs and larvae collected from spawning areas. This has significant implications for the restoration of depressed populations given the importance of diversity in such instances.…”

Section: Stocking Programsmentioning

confidence: 92%

Review of a species in peril: what we do not know about lake sturgeon may kill them

et al. 2015

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Lake sturgeon are arguably the largest and most unique freshwater fish in North America. Unfortunately their uniqueness includes many characteristics that make them especially vulnerable to anthropogenic impacts including overfishing, habitat fragmentation, and degradation. For approximately 100 years lake sturgeon populations across North America have either been in decline and (or) have experienced a sluggish recovery. While this is partly due to lake sturgeon life history, most researchers agree that habitat fragmentation and degradation are currently the highest risk to the species. Though most lake sturgeon populations are depressed, there are a few exceptions that offer a glimpse into what a stable population or recovery may look like. The following review highlights such instances as well as what is known and more importantly what is not known about this unique species. Specifically, we highlight the need for improved and organized sharing of raw data given the fact that many researchers do not have access to the plethora of information available to others (e.g., otoliths for aging). We examine the varying life history and diet choices of this plastic species offering hypotheses for differences in migration routes and distances as well the differing recovery rates found across their range. We highlight myths about the species providing evidence that they may not be as long lived and fecund as previously thought. We examine the lake sturgeon's current legal status across North America including the efforts of nonprofit groups that have had success in increasing population numbers. Most importantly, we highlight logistical problems faced by researchers and data gaps in the literature that must be filled to increase the odds of a successful recovery. Alongside the data gaps, the recovery of this species is fraught with political and industrial road blocks that are as varied as its current recovery. Subsequently, as is the case with many species, its survival will come down to solid scientific knowledge and the value placed on it by society.Résumé : L'esturgeon de lac constitue sans aucun doute l'unique et plus gros poisson d'eau douce en Amérique du Nord. Malheureusement, son unicité inclut plusieurs caractéristiques le rendant vulnérable aux impacts anthropogènes, incluant la surpêche ainsi que la fragmentation de l'habitat et sa dégradation. Pendant environ 100 ans, les populations d'esturgeon de lac sur l'ensemble de l'Amérique du Nord ont connu un déclin et/ou une lente récupération. Alors que ceci est dû en partie au cycle vital de l'esturgeon, la plupart des recherches s'accordent pour dire que la fragmentation de l'habitat et sa dégradation constituent présentement le plus fort risque pour cette espèce. Bien que la plupart des populations d'esturgeon de lac soient déprimées, il existe quelques exceptions offrant une idée de ce que représente une population stable ou en récupération. Cette revue souligne de tels cas ainsi que ce que l'on connaît au sujet de cette espèce unique. Spécifiquement, les auteu...

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“…This is especially true in the case of hatchery programs, in which spawning matrices (i.e. numbers, source(s), and use of broodstock), production, and release strategies are artificially controlled (Ryman and Laikre, 1991; Sundström et al., 2004; Chittenden et al., 2010; Crossman et al., 2011). It should be noted that changes in genetic signatures from specific management actions may be positive or negative, with managers’ efforts focused on positive outcomes and minimizing risks.…”

Section: Guiding Principlesmentioning

confidence: 99%

“…May, J. Rodzen, 2006, unpubl. data; Drauch et al., 2008; Welsh et al., 2008, 2010; Bott et al., 2009; Crossman et al., 2010, 2011; A. Drauch Schreier, B. Mahardja, B. May, 2011a,b, unpubl.…”

Section: Introductionmentioning

confidence: 99%

A review of genetic evaluation tools for conservation and management of North American sturgeons: roles, benefits, and limitations

Anders

Schreier

Rodzen

et al. 2011

Journal of Applied Ichthyology

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SummaryThis paper summarizes one component of a sturgeon conservation genetics workshop held in conjunction with the Third Annual Conference of the North American Chapter of the World Sturgeon Conservation Society from 31 August through 3 September, 2010, at Chico Springs, Montana, USA. The purpose of this portion of the workshop was to foster interdisciplinary communication, help characterize sturgeon conservation and management issues and challenges, and provide the context and rationale for selecting and employing appropriate genetic investigations for sturgeon programs. Specifically, this paper: (i) provides some guiding principles for sturgeon managers and conservationists considering genetic investigations; (ii) provides a general overview of relevant analytical genetic metrics and techniques, including complications from polyploidy; and (iii) provides several examples of sturgeon conservation and management programs currently using genetic analyses for various purposes. Numerous analytical techniques are currently available to address a range of individual and population genetic issues, including population structure and status, origins and relatedness of individual fish and populations, family identity and contribution to year class, species identity and hybridization, forensic cases, and the design and evaluation of conservation and management actions. Rather than focusing on mechanistic or quantitative aspects of available genetic analyses, this paper provides a general context, overview, and several empirical examples to guide the selection of genetic analyses for sturgeon programs. We also provide information from published studies involving procedural and quantitative aspects of sturgeon genetic analyses for further reference.

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Gamete and larval collection methods and hatchery rearing environments affect levels of genetic diversity in early life stages of lake sturgeon (Acipenser fulvescens)

Cited by 48 publications

References 71 publications

Lethal and non-lethal effects of predation by native fish and an invasive crayfish on hatchery-reared age-0 lake sturgeon (Acipenser fulvescensRafinesque, 1817)

Lethal and non-lethal effects of predation by native fish and an invasive crayfish on hatchery-reared age-0 lake sturgeon (Acipenser fulvescensRafinesque, 1817)

Review of a species in peril: what we do not know about lake sturgeon may kill them

A review of genetic evaluation tools for conservation and management of North American sturgeons: roles, benefits, and limitations

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