Derek H. Ogle

Northland College · Natural Resources

Unfortunately, I cannot provide full text to this book. You may be interested in the on-line materials for the book, including a link to how to purchase it, but also links to supplements and R code scripts, at http://derekogle.com/IFAR/ https://www.crcpress.com/Introductory-Fisheries-Analyses-with-R/Ogle/9781482235203

Estimating the time required (i.e., age) for fish in a population to reach a specific length (e.g., legal harvest length) is useful for understanding population dynamics and simulating the potential effects of length-based harvest regulations. The age at which a population reaches a specific mean length is typically estimated by fitting a von Berta...

Understanding influences of angler proximity on fisheries resources, the distances anglers are willing to travel, their success rates after they arrive, and seasonal ecological patterns could influence fisheries resiliency, license sales, and management. The Northern Highlands Fishery Research Area near Boulder Junction, Vilas County, WI maintains...

Understanding influences of angler proximity on fisheries resources, in the distances anglers are willing to travel for angling opportunities and their success rates after they arrive, could influence fisheries resiliency and management applications. The Wisconsin Department of Natural Resources, Northern Highland Fishery Research Area (NHFRA), Vil...

Understanding influences of human proximity to natural resources, the distances recreationalists are willing to travel, and their success after arrival could influence open-access resource resiliency and management. The Northern Highlands Fishery Research Area near Boulder Junction, Vilas County, WI maintains a compulsory creel census for five rese...

Understanding influences of angler proximity on fisheries resources, the distances anglers are willing to travel, and their success rates after they arrive could influence fisheries resiliency and management. The Northern Highlands Fishery Research Area near Boulder Junction, Vilas County, WI maintains a compulsory creel census for five research la...

Arctic charr (Salvelinus alpinus (Linnaeus, 1758)) are phenotypically plastic with multiple dietary–morphological relationships observed throughout their circumpolar range. Feeding strategies often differ between Arctic charr life histories and can impact size-at-age and morphological attributes. We examined growth, condition, and body morphology f...

An understanding of angler catch rate characteristics related to proximity of residence to lakes (local, non-local, non-resident) is important for informing fisheries management. The Northern Highland Fishery Research Area compulsory creel census records zip code data from all anglers fishing Escanaba, Nebish, and Pallette lakes near Boulder Juncti...

Due to time and resource limitations, growth of many fish species is evaluated with age and length data in a length stratified subsample of a sample from a population. Some fisheries professionals draw inferences about growth using age and length data from only those fish actually aged (aged‐only method). Alternatively, growth may be evaluated by e...

The Laurentian Great Lakes have experienced recent ecosystem changes that could lead to reductions in adaptive capacity and ultimately a loss of biodiversity and production throughout the food web. Observed changes in Great Lakes benthic communities include declines of native species and widespread success of invasive species like dreissenid mussel...

Recreational fisheries are valued at $190B globally and constitute the predominant way in which people use wild fish stocks in developed countries, with inland systems contributing the main fraction of recreational fisheries. Although inland recreational fisheries are thought to be highly resilient and self-regulating, the rapid pace of environment...

Growth is an important metric in fisheries and aquaculture. Growth of small fish over relatively short periods of time is commonly modelled with an exponential function using instantaneous growth rate (g). Instantaneous growth rates are logarithmic and inherently difficult to interpret, but specific growth rates (SGR) express growth as the intuitiv...

FULL TEXT NOT AVAILABLE ... We described a variety of mathematical functions that are used to model fish growth with few parameters. Estimating growth parameters by fitting nonlinear growth functions to data requires use of iterative algorithms. We reviewed common assumptions and necessary analytical steps for fitting growth functions to data, with...

Age estimates of Lake Superior Kiyis Coregonus kiyi from scales and otoliths were compared and 12 years (2003–2014) of length frequency data were examined to assess year-class strength and validate age estimates. Ages estimated from otoliths were precise and were consistently older than ages estimated from scales. Maximum otolith-derived ages were...

Pauly et al. (1992; Australian Journal of Marine and Freshwater Research 43:1151–1156) introduced a modified von Bertalanffy seasonal growth function that allowed for a period of no growth. Pauly et al. (1992) provided special purpose software to fit the model to length-at-age data, but this software is no longer available and specific details to i...

An index of biotic integrity (IBI) provides fishery professionals a single value to rapidly assess aquatic communities and evaluate restoration efforts within those communities. An IBI accounts for the structure, composition, and functional organization of the biological community. To address the difficulty of characterizing fish assemblages in lar...

Gray Jays (Perisoreus canadensis) are resident, boreal birds of northern Wisconsin, typically associated with Black Spruce (Picea mariana) bogs. Gray Jays cache perishable food items for over-winter consumption, and are therefore dependent on cold weather and the antibacterial and antifungal properties of the Black Spruce trees in which they store...

Pygmy Whitefish ";Prosopium coulterii" are a small, glacial relict species with a disjunct distribution in North America and Siberia. In 2013 we collected Pygmy Whitefish at 28 stations from throughout Lake Superior. Total length was recorded for all fish and weight and sex were recorded and scales and otoliths were collected from a subsample. We c...

Implemented and released in the fishWiDNR package in December, 2016.

In the Laurentian Great Lakes, nonnative Rainbow Smelt (Osmerus mordax) provide forage for Lake Trout (Salvelinus namaycush) and other predatory fish and are potential competitors with and predators of young Coregonus species. In recent years, their populations have declined across the Laurentian Great Lakes. This study is centered on Whitefish Bay...

Lake Sturgeon do not exhibit sexually dimorphic external characteristics. Therefore, the sex of Lake Sturgeon has traditionally been determined via internal examination of gonadal tissue. Recently, several non-invasive methods to determine sex of Lake Sturgeon have been proposed to minimize stress or injury that may cause mortality of the fish. Our...

Burrowing mayflies (Ephemeroptera: Ephemeridae) are sensitive to pollution and have been used as environmental indicators in the Great Lakes. Hexagenia limbata and Ephemera simulans population abundance and biomass estimates from Chequamegon Bay, Lake Superior, were compared between the years 2002 and 2012 as well as inside and outside the Northern...

The growth of many organisms is seasonal, with a dependence on variation in temperature, light, and food availability. A growth model proposed by Somers (Fishbyte 6:8–11, 1988) is one of the most widely used models to describe seasonal growth. We point out that three different formulae (beyond numerous typographical errors) have been used in the li...

The ability to reduce a population of ruffe (Gymnocephalus cernuus) with intense repeated bottom trawling was examined at two locations in Chequamegon Bay of Lake Superior. Trawling significantly depleted the population at the Kakagon River site but not at the Second Landing site. At least 93% of the estimated population of ruffe was removed from t...

A Bayesian approach for assigning probabilities to ages assigned by the temporal signature technique is developed and applied to a sample of fish. Temporal signatures are characteristic growth patterns found on fish calcified structures that can be used to assign ages to fish that exhibit only partial growth histories. Bayesí theorem is used to cal...

This study investigated outcomes of a college outdoor orientation program that utilized 3, 4, 5, and 12-day adventure based trips. Sense of community and sense of place were measured using a one-sample pre/post-test design (n = 118). Paired sample t-tests were implemented to explore differences and, in general, students reported significant changes...

Ruffe Gymnocephalus cernuus length–weight data from 141 data sets were obtained from a variety of waters across Europe and the Laurentian Great Lakes for summarization and development of standard weight (Ws) equations. The mean slopes of the length–weight relationships from all populations and for all percentiles except the 95th percentile were not...

The ruffe is a percid native to Europe and Asia that has invaded several new areas in the last several decades. For population studies ruffe are often frozen en masse after collection in the field and thawed at a later time for measurements of length and weight. I determined the effect of freezing and thawing on ruffe total length (TL) and weight (...

More than 200 schools currently use some form of the Outward Bound-adapted model of outdoor orientation (OO). Assisting students with the transition to college is a primary goal of these programs (Bell, Holmes, Vigneault, & Williams, 2008). This study was conducted at a small Midwestern liberal-arts college with a strong environmental mission. Part...

Baited modified minnow traps are often used to collect rusty crayfish (Orconectes rusticus), an invasive species in many areas of North America. However, the use of baited traps as a collection gear for decapods has received considerable scrutiny. We designed a tank-experiment to determine if captured rusty crayfish exclude uncaptured rusty crayfis...

The diet of larval (3-17mm total length) ruffe (Gymnocephalus cernuus) is described from samples collected in 1994 at two locations in the St. Louis River Harbor, a tributary to Lake Superior. Copepoda, Daphnia spp., and Bosmina longirostris dominated the diet of larval ruffe in the St. Louis River Harbor. Larger Copepoda and Daphnia spp. occurred...

The ruffe (Gymnocephalus cernuus), a Percid native to Europe and Asia, has recently been introduced in North America and new areas of Europe. A synopsis of the biology and life history of ruffe suggests a great deal of variability exists in these traits. Morphological characters vary across large geographical scales, within certain water bodies, an...

We investigated two assumptions about scales of hatchery-reared lake trout Salvelinus namaycush stocked as yearlings into Lake Superior: (1) only one check is formed during hatchery life and (2) a “stocking check” forms when the fish are released. We examined four scales from each of 176 fish prior to release from five hatcheries and 55 fish soon a...

The ruffe Gymnocephalus cernuus, an exotic Eurasian percid, recently became es- tablished in the St. Louis River estuary. Lake Superior, after accidental introduction. Management actions (catch regulations and stockings) were enacted in 1989 to increase the density of top-level predators in the estuary, and thus to increase predation on ruffe. We c...

Ruffe Gymnocephalus cernuus, a percid native to Europe and Asia, is established in the Lake Superior drainage and could have negative impacts on native fish through competition for forage and predation on fish eggs. We investigated the diet of ruffes in the 4,654-ha St. Louis River estuary in May–October 1989–1990 and the feeding periodicity of ruf...

The temporal signature technique can be used to assign age to fish that show an incomplete or indistinct growth history at the margins of their scales. The temporal signature technique matches part of an individual's "environmental" growth history to characteristic patterns found in a master chronology that was developed from reliably aged specimen...

—The ruffe Gymnocephalus cernuus, an exotic Eurasian percid, recently became es- tablished in the St. Louis River estuary. Lake Superior, after accidental introduction. Management actions (catch regulations and stockings) were,enacted,in 1989 to increase the density,of top-level predators in the estuary, and thus to increase predation on ruffe. We...