Experimental Management of a Group of Small Michigan Lakes

Eight small pit lakes, located in the Pigeon River State Forest, were considered to be ecologically suited to trout as determined by a physical, chemical, and biological survey of these lakes in 1931 and 1932. Four of the lakes were found to be over‐run with yellow perch, the other four originally contained only forage fish. Trout (chiefly brook trout) were stocked in each of the lakes. They grew and survived well in those lakes which did not contain perch but were relatively unsuccessful in the “perch” lakes. One of these lakes was fertilized with phosphate and later yielded both trout and perch of fair size, the other three were poisoned and later restocked with trout and, in one instance, with Montana grayling.The trout were not easily caught in mid‐summer, and, for this reason, the lakes were opened to fishing during the regular trout fishing season starting about May first.Creel census on some of these lakes for several seasons indicates that the yield varied from 4.3 pounds per acre of trout in one lake to 30 pounds per acre of trout in another lake.These lakes, once valueless for fishing, are now attracting some of the anglers away from the heavily fished, perhaps over‐fished, section of the Pigeon River which flows through the immediate vicinity.Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/141534/1/tafs0120.pd

The Pygmy Whitefish, Coregonus Coulteri, in Lake Superior

Bottom trawling by the U. S. Fish and Wildlife Service motor vessel Cisco in Lake Superior in 1952–1953 revealed a large population of a tiny whitefish, Coregonus (Prosopium) coulteri, which has been reported previously only from northwestern North America. The hiatus in range, from Lake Superior to the Columbia River basin, is the greatest known for a North American freshwater fish. Although minor structural differences characterize the disjunct populations of the pygmy whitefish, these are not deemed worthy of nomenclatorial recognition. Comparisons with related species indicate that the pygmy whitefish is distinctive in the small size, large scales, few vertebrae, few pyloric caeca, and in other characters.The pygmy whitefish is widely distributed in Lake Superior, especially in semi‐protected bays, such as Keweenaw Bay which yielded about 68 percent of the 1,623 specimens caught. The bathymetric range was 10 to 49 fathoms, with maximum abundance at the 25‐ to 39‐fathom interval. Average length of fish increased progressively with water depth, chiefly because the number of yearlings declined from 100 percent at 10–14 fathoms to none at 45–49 fathoms.The average total length of pygmy whitefish caught by trawling was 3.4 inches (range 1.2 to 5.7). Extraordinarily slow growth was revealed by the examination of scales. Two fish from Keweenaw Bay, both nearing the end of their eighth growing season, were only 5.4 inches long. Compared to Keweenaw Bay, growth rate was about the same near Laughing Fish Point, faster in the Apostle Islands (and in Bull and McDonald Lakes, Montana), and slower in Siskiwit Bay, Isle Royale. Females grew more rapidly than males after the second year and had a longer life span.All male pygmy whitefish were mature at the age of 2 years and a total length of 3.6 or more inches. Most females were mature at 3 years and 4.2 inches; all older females were mature. Mean egg production was 362 (range, 93 to 597) per fish and 26 per gram of total weight for fish from 3.4 to 5.9 inches long. Spawning in 1953 occurred sometime in November or December.Crustacea (principally ostracods and amphipods–copepods in the young) occurred in 106 of 112 pygmy whitefish stomachs and made up 77 percent of the total food volume. When available, fish eggs appear to be important in the diet.Other cold‐water fishes–cottids, ninespine sticklebacks, smelt, and four species of coregonines–were the most frequent associates of the pygmy whitefish. Lake trout and trout‐perch were also taken with it at the same stations or in the same trawl hauls. Its closest relative in Lake Superior, the round whitefish, was not an ecological associate.Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/141996/1/tafs0161.pd

Range extensions for the scorpionfish Scorpaena isthmensis

New localities are cited off Honduras, Yucatan, Florida and North Carolina for this species which is best known from southern tropical Atlantic coastal waters

BIBLIOGRAPHY OF RESEARCH PUBLICATIONS OF THE U.S. BUREAU OF SPORT FISHERIES AND WILDLIFE, 1928-72

This bibliography comprises publications in fishery and wildlife research authored or coauthored by research scientists of the Bureau of Sport Fisheries and Wildlife and certain predecessor agencies. Separate lists, arranged alphabetically by author, are given for each of 17 fishery research and 6 wildlife research laboratories, stations, investigations, or centers. Publications coauthored by Bureau scientists from different research units are credited to the facility at which the senior author was stationed at the time of publication. Although the Federal Government has supported research on fish and wildlife since the late 1800\u27s, the relatively few works published in the early years are not directly identifiable with the existing or recent research units whose bibliographies are included here. Consequently the present lists, with three exceptions, are limited to the contributions of facilities that began operation in or after 1939, the year in which the Department of the Interior was given responsibility for fishery and wildlife research. The exceptions are the Great Lakes Fishery Laboratory (established in 1927), the Tunison Laboratory of Fish Nutrition (1932), and the Western Fish Disease Laboratory (1935)

AN ANALYSIS OF FISHING IN THE TVA IMPOUNDMENTS DURING 1939

An inventory of fishing on Norris, a storage reservoir, was begun in 1938. The following year it was extended to Wheeler, a run-of-the-river reservoir, and to the tailwater area below Wilson Dam. This inventory, therefore, covered each of the three general types of fish habitats created by the TVA dams. This discussion is a summary of the 1939 fishing data, together with recommendations for fish management based on the creel census information. The data collected totaled 34,270 usable fishing records, representing a catch of 98,495 fishes

C.C.C. Stream Improvement Work in Michigan

Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/141739/1/tafs0404.pd

Unlocking the potential of ancient fish DNA in the genomic era.

Fish are the most diverse group of vertebrates, fulfil important ecological functions and are of significant economic interest for aquaculture and wild fisheries. Advances in DNA extraction methods, sequencing technologies and bioinformatic applications have advanced genomic research for nonmodel organisms, allowing the field of fish ancient DNA (aDNA) to move into the genomics era. This move is enabling researchers to investigate a multitude of new questions in evolutionary ecology that could not, until now, be addressed. In many cases, these new fields of research have relevance to evolutionary applications, such as the sustainable management of fisheries resources and the conservation of aquatic animals. Here, we focus on the application of fish aDNA to (a) highlight new research questions, (b) outline methodological advances and current challenges, (c) discuss how our understanding of fish ecology and evolution can benefit from aDNA applications and (d) provide a future perspective on how the field will help answer key questions in conservation and management. We conclude that the power of fish aDNA will be unlocked through the application of continually improving genomic resources and methods to well-chosen taxonomic groups represented by well-dated archaeological samples that can provide temporally and/or spatially extensive data sets

Oreoglanis infulatus , a new species of glyptosternine catfish (Siluriformes: Sisoridae) from central Vietnam

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/72781/1/j.1095-8649.2001.tb00183.x.pd

The fishes of ascension Island, central Atlantic Ocean - new records and an annotated checklist

A checklist of the fishes of Ascension Island is presented. The species Rhincodon typus, Alopias superciliosus, Isurus oxyrinchus, Carcharhinus obscurus, Galeocerdo cuvier, Sphyrna lewini, Hexanchus griseus, Manta birostris, Gymnothorax vicinus, Hippocampus sp., Epinephelus itajara, Cookeolus japonicus, Apogon pseudomaculatus, Phaeoptyx pigmentaria, Remora albescens, Caranx bartholomaei, Carangoides ruber, Decapterus tabl, Seriola dumerili, Thalassoma sanctaehelenae, Cryptotomus sp., Ruvettus pretiosus, Acanthocybium solandri, Auxis rochei, Auxis thazard, Euthynnus alletteratus, Katsuwonus pelamis, Thunnus alalunga, Thunnus obesus, Xiphias gladius, Istiophorus platypterus, Kajikia albida, Makaira nigricans, Tetrapturus pfluegeri, Hyperoglyphe perciformis, Schedophilus sp., Cantherhines macrocerus, Sphoeroides pachygaster and Diodon eydouxii are recorded for the first time from Ascension Island. We have recognized two previous records as identification errors and indicate 11 other records as doubtful. Including the 40 new records, we now list 173 fish species from Ascension Island, of which 133 might be considered 'coastal fish species'. Eleven of these (8.3%) appear to be endemic to the island and a further 16 species (12%) appear to be shared endemics with St Helena Island.Darwin Initiative [EIDCF012]info:eu-repo/semantics/publishedVersio

A phylogenomic perspective on diversity, hybridization and evolutionary affinities in the stickleback genus Pungitius

Hybridization and convergent evolution are phenomena of broad interest in evolutionary biology, but their occurrence poses challenges for reconstructing evolutionary affinities among affected taxa. Sticklebacks in the genus Pungitius are a case in point: evolutionary relationships and taxonomic validity of different species and populations in this circumpolarly distributed species complex remain contentious due to convergent evolution of traits regarded as diagnostic in their taxonomy, and possibly also due to frequent hybridization among taxa. To clarify the evolutionary relationships among different Pungitius species and populations globally, as well as to study the prevalence and extent of introgression among recognized species, genomic data sets of both reference genome-anchored single nucleotide polymorphisms and de novo assembled RAD-tag loci were constructed with RAD-seq data. Both data sets yielded topologically identical and well-supported species trees. Incongruence between nuclear and mitochondrial DNA-based trees was found and suggested possibly frequent hybridization and mitogenome capture during the evolution of Pungitius sticklebacks. Further analyses revealed evidence for frequent nuclear genetic introgression among Pungitius species, although the estimated proportions of autosomal introgression were low. Apart from providing evidence for frequent hybridization, the results challenge earlier mitochondrial and morphology-based hypotheses regarding the number of species and their affinities in this genus: at least seven extant species can be recognized on the basis of genetic data. The results also shed new light on the biogeographical history of the Pungitius-complex, including suggestion of several trans-Arctic invasions of Europe from the Northern Pacific. The well-resolved phylogeny should facilitate the utility of this genus as a model system for future comparative evolutionary studies.Peer reviewe