K. A. Boysen's research while affiliated with Saint Louis University and other places

Publications (7)

Article
Full-text available
Harvesting of liver samples for toxicologic and other laboratory analyses is frequently undertaken in free-ranging fish to evaluate accumulations of various pollutants and chemicals. However, commonly used, lethal techniques for collecting liver tissues are unacceptable when dealing with protected species. We report the use of a nonlethal, single-e...
Article
Summary Critical swimming speeds of sturgeon are presumably lower in vertically uniform, rectilinear flow than in heterogeneous boundary-layer flow. Movement in rectilinear flow of the water column necessitates frequent high-energy free-swimming, while movement in boundary-layers near the bottom of the river permits a variety of lower energy behavi...
Article
Summary Sturgeon are threatened by dredging, but there is no established protocol for determining risk of entrainment to different populations of wide-ranging species. We demonstrate that laboratory evaluations of swimming performance for individual populations are an effective way to describe susceptibility of entrainment. Using a Blazka-type swim...
Article
White sturgeon, Acipenser transmontanus (Richardson), are at risk of entrainment from dredging, with young-of-the-year fish at greatest risk. To evaluate this entrainment risk, swimming performance trials were conducted in a laboratory swim tunnel with hatchery-reared juvenile white sturgeon with varying experience levels including: naïve (only tes...
Article
Thirty-six sturgeon (Scaphirhynchus spp.) were captured from the lower Mississippi River using baited trot-lines, anesthetized using tricaine methanesulfonate, and subjected to endoscopic evaluation of their coelom (coelioscopy) on the river bank. Using a 2.7 mm rod-lens telescope and gravity–fed sterile saline infusion, gender and reproductive sta...
Chapter
Full-text available
Juvenile paddlefish (Polyodon spathula) exhibit conspicuous variation in the shape of their rostra and caudal fins. We quantified morphological variation for a composite collection of young-of-year paddlefish (N = 55, 61.9-403.7 mm total length) using nine measurements of the rostrum, body, and caudal fin. Sheared principal component analysis of mo...

Citations

... A nil-recapture model was used to estimate the minimum expected population size of bristly cave crayfish in Smallin Cave. The nil-recapture model was selected because recaptures during each event ranged from 0 to 2 and because Smallin Cave can be classified as an environment that is difficult to sample (Bell, 1974;Friedenberg et al., 2018). Using Bayesian methods improves the interpretation of the resulting model by allowing statements about the probability that abundance exceeds some lower bound. ...
... In addition, U crit measured on white sturgeon (Counihan and Frost, 1999), Shovelnose sturgeon (Adams et al., 2003) and Green sturgeon (Langford et al., 2005) were 1.5-2 times lower than those measured in the present study. Only the U crit reported by Hoover et al. (2011) (U crit =95,2 cm.s − 1 ) in Shovelnose sturgeon is in the range of the one of this present study. Differences in species and ages of fish are likely to explain the differences observed in U crit . ...
... Results from laboratory swimming performance studies for Lake and Pallid Sturgeon suggest that for sturgeon in the 10-90 cm length classes show higher levels of risk when modeled with dredge flow fields. However, elevated risks were shown to be limited to within the 1.25 m radius of the drag head dredge (Hoover et al. 2011). Although it is worth noting, perceived risk to Green Sturgeon within the current population structure may be assuaged by the low probability of dredge encounter, particularly given the rarity of the species within the system. ...
... After clove oil narcotization, we measured 21 morphometric and four meristic characters (Table 3) on 218 American paddlefish × Russian sturgeon hybrids, 49 American paddlefish, and 50 Russian sturgeon individuals with a digital caliper. The morphometric characters were determined according to Holcik et al. [32], Keszka and Krzykawski [33], and Hoover et al. [34]. In addition, we measured the width of the first three dorsal scutes. ...
... Endoscopy has been described in catfish (Ictalurus punctatus) (Boone et al. 2008), trout (Oncorhynchus mykiss) (Moccia et al. 1984), wolf fish (Hoplias aimara) (Weber 2011b), eel (Anguilla Anguilla) (Macri et al. 2014), and sturgeon (Hernandez- Divers et al. 2004;Divers et al. 2013;Falahatkar and Poursaeid 2014) among others, to determine sex, evaluate coelomic organs, remove ingested foreign bodies, and obtain biopsies (Boone et al. 2008;Stetter 2010;Divers et al. 2013). Celioscopy may be performed with the endoscope inserted directly into the coelomic cavity or within the swim bladder (Stetter 2010;Stevens et al. 2019). ...
Reference: Fish Surgery
... and Kynard 1995; Chiasson et al. 1997;Boysen and Hoover, 2009;Wishingrad et al. 2014a, b) and recently, the negative phototaxic behaviour was used in the development of a volitional swim trial in lake sturgeon (Deslauriers et al. 2018a). ...
... However, current clinical endoscopes are unsuitable for field diagnosis because most endoscopes require peripheral equipment to operate, such as a power supply, data-processing unit, and monitor. Portable endoscope systems combining this equipment have been developed and used to examine cavities in animals [6,7] and to evaluate the gastrointestinal tracts of human patients [8,9], which demonstrated the potential of POCT endoscopy. However, these systems are not light ...