Fish Distribution Maps. Available for purchase at the DEEP Store. Field characteristics, such as shape of body parts and color, are often the first thing we notice about fishes, but because they vary, a number of them must be taken into account before a fish can be reliably identified by field characteristics alone. Red circles and triangles and light brown drainage areas indicate that a species is experiencing a range expansion.
Added to this body of work are three surveys conducted by University of Connecticut master’s degree candidates. Get the facts at ct.gov/coronavirus. The fish distribution maps use a series of symbols and shaded watershed areas to indicate where each species was sampled and whether each has always been there, is relatively new to the area, or was historically present but has not been found recently.
Black circles and triangles accompanied by light-green-shaded drainage areas indicate that the species was found during both recent (post 1980) and earlier (before 1970) surveys. Data from two older Connecticut lake and pond surveys (Thorpe 1942, Wilde 1959) were compared with those of the more recent surveys to infer changes in fish distribution among lakes. fishermen, homeowners). So to be more certain of any fish’s identity, it is best not to focus on only one or two characteristics, but to instead keep in mind a suite of possibilities. One survey used seining to sample 120 southeastern Connecticut pond and swamp sites to better define the range of the banded sunfish (Jann 2001). Fish Distribution Maps. To gather this information, technical staff from jurisdictions, agencies, tribes and stakeholder groups participated in an information-sharing workshop in May of 1999. The table includes the source of the sighting, stream name, and a description of the sighting. Wherever a species was caught in a stream (dots or open circles), the corresponding local drainage area is also shaded. This shading was done to indicate that although the fish species was caught in a particular spot, it is also likely to be in other areas of the drainage because stream fish are generally free to move up or down stream. max. 09/20/2018 21:25:13 Started caching Fish Net 2 data.
These categories were added after the initial workshop so not all the points have this data. Historical data from one statewide stream fisheries survey (Whitworth et al. Food and Agriculture Organization of the United Nationsfor a world without hunger. However, fish have many unique features, so learning some technical terms is necessary to describe them. Next is described where/how (or if) people can best observe the species or signs of it (e.g., nests) and how it can most easily be captured. Open circles or triangles and yellow-shaded drainage areas indicate that a species was caught during an older survey (1960s or earlier), but has not been detected by any recent survey. Then, narrowing your fish down to species is much easier.
For the academically minded, a technical taxonomic key to Connecticut fishes can be consulted.
Using a GIS approach, maps of distribution of a large number of aquatic species are accurately reproduced and disseminated. Please read the disclaimer that precedes each downloadable pdf map / data table on the following map pages. Geographic terms and habitat descriptions were extracted from the FAO Catalogues of Species and combined with global databases from authoritative sources. For lake, pond or major river samples, drainage areas are not shaded because lake fish populations tend to be more discrete and isolated, i.e. 1988) was used to compare against the more recent fish distribution data. The fish data on the map is represented with lines and points. 11/15/2018 15:19:23 Added GBIF.org collection data to species maps.
The primitive, snakelike fish families are first (for example, lampreys), followed by cylindrically-shaped fishes with no spines (like trout and minnows), then by the typical spiny fishes (like sunfish and perches), and finally by the remaining miscellaneous oddballs. These distribution maps are "generic" in that they show the broad range of a particular species. In the case of major rivers, it can be assumed that any species might be found some distance up or down stream from where it was sampled, but not all river species commonly move into smaller tributary streams.
Another incorporated backpack electrofishing gear to search for burbot in a number of northwestern Connecticut streams (Dixon and Vokoun 2006). DEEP COVID-19 Response. Anadromous Fish Data. As with many things, getting good at identifying fish takes practice.
See an example fish distribution map for the bridle shiner below. Contains what else is interesting, noteworthy or “cool” about the species. Unfortunately, they are not often the most obvious traits, often being such things as number of dorsal spines or number of scales along the lateral line. Stream sites where fish were caught are indicated by dots, whereas lake and major river captures are represented by triangles (see Legend for Fish Distribution Maps on next page).
Text and images adapted from Jacobs, R. P., O'Donnell, E. B., and Connecticut DEEP. it is more difficult to get in or out of most lakes. Finally, a survey using fyke, seine and gill nets to sample shoreline streams and estuaries of eastern Connecticut (Fried 2006) was used to supplement the distributions of marine and estuarine fishes. 200-300 additional species are continuing to be described each year. The foundational fish distribution dataset is an event table that contains attributes for each species of fish, anadromous and resident, that have previously been mapped by either NWIFC or WDFW. To make using this website a little less daunting, we have attempted to keep the technical jargon to a minimum. Size. These historical surveys incorporated gill and seine nets to sample fishes in 47 lakes (1937-39) and 154 lakes (1953-56), respectively. The main source of lake data used in the distribution maps is from the Statewide Lake and Pond Survey, which collected fish data from 161 lakes, ponds and some major river stretches by nighttime boat electrofishing (Jacobs and O’Donnell 1996, 2005). See “Parts of a Fish” below for the terms most commonly used in this book.