2015
DOI: 10.1080/15222055.2014.999847
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Egg and Larval Development Index for Lake Sturgeon

Abstract: We developed an index of egg and larval maturation for Lake Sturgeon Acipenser fulvescens to incrementally chart development over time. To evaluate the relationship between temperature and development rate, eggs and larvae from the Wolf River were incubated at four constant water temperatures. The time required for neural tube closure, hatch, and exogenous feeding were monitored. The number of hours from incubation to each development stage and mean water temperature were related by predictive exponential regr… Show more

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Cited by 10 publications
(15 citation statements)
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“… Dates of spawning activity were back calculated using lake sturgeon specific developmental indices (Eckes et al., 2015) that account for water temperature during egg incubation until initial larval outmigration. …”
Section: Resultsmentioning
confidence: 99%
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“… Dates of spawning activity were back calculated using lake sturgeon specific developmental indices (Eckes et al., 2015) that account for water temperature during egg incubation until initial larval outmigration. …”
Section: Resultsmentioning
confidence: 99%
“…D‐frame drift nets (76 cm across the base; 54 cm high; knotless 1.6‐mm mesh nylon bag 317.5 cm long with a detachable collection cup) were used to collect drifting larval lake sturgeon below spawning grounds that exist below the first dams on both the Oconto and Menominee Rivers. Sampling for drifting larval lake sturgeon began when eggs from the first record of spawning activity (see below) were estimated to reach ~50% in development (Aloisi, Gordon, Starzl, Walker, & Brady, 2006; Eckes et al., 2015) and occurred nightly until larval from all projected spawning events had exceeded 100% development by several days. This approach assured that sampling would start a few days prior to the onset of drift and continue sampling for a few days following drift each season.…”
Section: Methodsmentioning
confidence: 99%
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“…We removed all observed eggs with forceps and placed them in 15-mL falcon tubes with 95% nondenatured ethanol. We identified Lake Sturgeon eggs based on morphological traits (sensu Wang et al 1985;Eckes et al 2015). Of the traps from which we collected putative Lake Sturgeon eggs, we selected one to two eggs per trap for genetic species identification to validate morphological identification.…”
Section: Methodsmentioning
confidence: 99%
“…Fertilized lake sturgeon eggs settle to the rocky substrate and hatch after approx. 5-14 days, depending on the water temperature (Auer & Baker, 2002;Bruch & Binkowski, 2002;Eckes, Aloisi, & Sandheinrich, 2015;Scott & Crossman, 1973). Water temperatures during breeding activity can range anywhere from 8.8 to 21.1°C; optimal spawning temperatures are 11.5-16.0°C, which agrees with optimal A. fulvescens embryonic survival (Bruch & Binkowski, 2002;Wang, Binkowski, & Doroshov, 1985).…”
mentioning
confidence: 99%