Significance of Organic Detritus in the Diet of Larval Lampreys in the Great Lakes Basin

1994 ◽  
Vol 51 (11) ◽  
pp. 2380-2387 ◽  
Author(s):  
Trent M. Sutton ◽  
Stephen H. Bowen
Keyword(s):  
Great Lakes ◽  
Feeding Rate ◽  
Assimilation Efficiency ◽  
Dry Mass ◽  
Great Lakes Basin ◽  
Organic Detritus ◽  
Upper Peninsula ◽  
Sea Lampreys ◽  
Gut Fullness ◽  
Upper Peninsula Of Michigan

Larval sea lamprey (Petromyzon marinus) and northern brook lamprey (Ichthyomyzon fossor) were collected monthly from three streams in the Upper Peninsula of Michigan from May 1992 through May 1993 and larval sea lampreys were collected during summer months from sites throughout the Great Lakes basin. Organic detritus made up most of the diet ash-free-dry-mass (AFDM) throughout the year, averaging 97.79%, with algae (2.12%) and bacteria (0.09%) making up the remainder of the diet AFDM. Assimilation efficiency for AFDM averaged 72% during warmer months and 53% during cooler months (annual mean = 61%). Gut fullness (amount of AFDM in the anterior one-tenth of the intestine) was low (mean = 0.10 mg diet AFDM∙g−1 ammocoete). There were no significant differences in these measures between ammocoetes collected from the Upper Peninsula and those collected throughout the Great Lakes basin. From a laboratory-determined relationship between gut fullness and feeding rate, feeding rate in the field was estimated to be extremely slow, ranging from 4.2 to 5.5 mg diet AFDM∙g−1 ammocoete∙d−1. These observations indicate that larval lampreys efficiently utilize a diet of organic detritus during warmer months when stream temperatures and food quality are more favorable for feeding, digestion, and growth.

Biology, Management, and Conservation of Lampreys in North America

2009 ◽  
Keyword(s):  
North America ◽  
Food Resource ◽  
Assimilation Efficiency ◽  
Sampling Period ◽  
Dry Mass ◽  
High Rate ◽  
Diel Periodicity ◽  
Organic Detritus ◽  
Gut Fullness ◽  
Management And Conservation

<em>Abstract</em>.—Larval lampreys are burrowing suspension feeders in streams that efficiently use organic detritus as their primary nutrient source. Although larval lampreys often exhibit daily patterns in activity (being most active at night), diel variations in food habits and feeding behavior have not been investigated. The objective of this study was to determine whether larval northern brook lampreys <em>Ichthyomyzon fossor</em> exhibit diel periodicity in diet composition, assimilation efficiency, or gut fullness. Larvae were collected at 4-h intervals over a 24-h period from the Pike and Pilgrim rivers, Michigan. Organic detritus composed most of the diet ash-free-dry-mass (AFDM) for each sampling period, and averaged 94.7% and 97.4% for the Pike and Pilgrim rivers, respectively. Assimilation efficiency of AFDM averaged 61.3% (range, 55.7–68.9%) for the Pike River and 87.5% (range, 80.8–94.3%) for the Pilgrim River. Gut fullness in the Pike and Pilgrim rivers was low, averaging 0.23 (range, 0.18–0.30) and 0.20 (0.14–0.25) mg diet AFDM per grams larvae, respectively. Although gut fullness did vary slightly on a diel basis, larval northern brook lampreys feed continuously but slowly in order to achieve a high rate of assimilation from a low-quality food resource.

scholarly journals Radiocarbon “Wiggles” in Great Lakes Wood at About 10,000 to 12,000 BP

Radiocarbon ◽  
2007 ◽  
Vol 49 (2) ◽  
pp. 855-864 ◽  
Author(s):  
Steven W Leavitt ◽  
Irina P Panyushkina ◽  
Todd Lange ◽  
Li Cheng ◽  
Allan F Schneider ◽  
...  
Keyword(s):  
Great Lakes ◽  
Younger Dryas ◽  
Great Lakes Region ◽  
Chemical Pretreatment ◽  
Upper Peninsula ◽  
White Mountains ◽  
East Central ◽  
Subfossil Wood ◽  
Upper Peninsula Of Michigan ◽  
Source Of Error

High-resolution radiocarbon calibration for the last 14,000 cal yr has been developed in large part using European oaks and pines. Recent subfossil wood collections from the Great Lakes region provide an opportunity to measure 14C activity in decadal series of rings in North America prior to the White Mountains bristlecone record. We developed decadal 14C series from wood at the classic Two Creeks site (∼11,850 BP) in east-central Wisconsin, the Liverpool East site (∼10,250 BP) in northwestern Indiana, and the Gribben Basin site (∼10,000 BP) in the Upper Peninsula of Michigan. Initial AMS dates on holocellulose produced younger-than-expected ages for most Two Creeks subsamples and for a few samples from the other sites, prompting a systematic comparison of chemical pretreatment using 2 samples from each site, and employing holocellulose, AAA-treated holocellulose, alpha-cellulose, and AAA-treated whole wood. The testing could not definitively reveal the source of error in the original analyses, but the “best” original ages together with new AAA-treated holocellulose and α-cellulose ages were visually fitted to the IntCal04 calibration curve at ages of 13,760–13,530 cal BP for the Two Creeks wood, 12,100–12,020 cal BP for Liverpool East, and 11,300–11,170 cal BP for Gribben Basin. The Liverpool East age falls squarely within the Younger Dryas (YD) period, whereas the Gribben Basin age appears to postdate the YD by ∼300 yr, although high scatter in the decadal Gribben Basin results could accommodate an older age nearer the end of the YD.

Glacial history of Northeastern Ontario II. The Timiskaming–Algoma area

1968 ◽  
Vol 5 (1) ◽  
pp. 97-109 ◽  
Author(s):  
A. N. Boissonneau
Keyword(s):  
Lake Superior ◽  
Great Lakes Basin ◽  
Upper Peninsula ◽  
North Shore ◽  
The North ◽  
Sequence Of Events ◽  
Glacial Chronology ◽  
History Of ◽  
Surficial Deposits ◽  
Upper Peninsula Of Michigan

The surficial deposits, ice movements, and glacial lakes within an area of 34 500 square miles in northeastern Ontario are described. Some of the moraines of the study are tentatively correlated with moraines to the west in the upper peninsula of Michigan, in the Nipigon area, and along the north shore of Lake Superior. The glaciolacustrine deposits and sequence of events in the study area in relation to the glacial features and chronology of the southern Great Lakes basin provide a basis for a partial glacial chronology for the study area. A knowledge of the glacial features of this area further elucidates the integration of movements of two advancing ice lobes, which was observed in northwestern Quebec.

Factors Influencing the Distribution of Sea Lamprey (Petromyzon marinus) in the Great Lakes

1980 ◽  
Vol 37 (11) ◽  
pp. 1811-1826 ◽  
Author(s):  
R. H. Morman ◽  
D. W. Cuddy ◽  
P. C. Rugen
Keyword(s):  
Great Lakes ◽  
Water Temperature ◽  
Petromyzon Marinus ◽  
Sea Lamprey ◽  
Great Lakes Basin ◽  
Wide Range ◽  
Sea Lampreys ◽  
Host Fishes ◽  
Major Factors ◽  
Parasitic Phase

The sea lamprey (Petromyzon marinus) is widely distributed in the Great Lakes but it is absent from or scarce in large parts of the watershed. Since 1957, larval sea lampreys have been detected in only 433 (7.5%) of the 5747 streams in the Great Lakes basin. Parasitic-phase sea lampreys range throughout the lakes, wherever suitable host fishes occur, but probably do not inhabit the western and central basins of Lake Erie to any great extent during summer. Many environmental conditions influence the distribution of sea lampreys. Streamflow and water temperature are of major importance in attracting spawning runs to streams. The dispersal of spawning adults within streams is influenced mainly by blockages, water temperature, current, bottom type, and the presence of inland lakes. Water temperature is probably the most important factor affecting the development and survival of embryos. The distribution of larval lampreys is limited primarily by barriers that block adult spawning runs, warm temperatures, low and unstable flows, hard stream bottom, and pollution; nonetheless, larvae have been found in a wide range of habitats exhibiting these conditions. Interconnecting waterways and attachment to fishes and boats are considered major factors in the lake movements of parasitic-phase lampreys.Key words: sea lamprey, Petromyzon marinus; Great Lakes, geographic distribution, influences, movement, spawning, larvae, parasitic, control

A rapid assessment approach to prioritizing streams for control of Great Lakes sea lampreys (Petromyzon marinus): a case study in adaptive management

2008 ◽  
Vol 65 (11) ◽  
pp. 2471-2484 ◽  
Author(s):  
Gretchen J.A. Hansen ◽  
Michael L. Jones
Keyword(s):  
Great Lakes ◽  
Fishery Management ◽  
Petromyzon Marinus ◽  
Rapid Assessment ◽  
Current Method ◽  
Assessment Method ◽  
Great Lakes Basin ◽  
Sea Lampreys ◽  
Assessment Approach ◽  
Current Assessment

We developed and evaluated an alternative method (rapid assessment or RA) for assessment of larval sea lampreys, Petromyzon marinus . We determined that using RA would result in at least as many, if not more, sea lampreys being killed than would using the current assessment method (quantitative assessment sampling or QAS) to select streams for lampricide treatment. Both assessment methods were carried out simultaneously throughout the entire Great Lakes basin from 2005 to 2007. RA required fewer resources than the current method and thus allowed for the chemical treatment of additional streams with lampricides, given a fixed overall budget for control. Population estimates generated from the QAS surveys showed that using RA would result in approximately equal numbers of metamorphosing lamprey and greater numbers of larval lamprey killed than by using QAS. Mark–recapture results indicated that prioritizing streams for treatment using RA may result in higher numbers of metamorphosing and larval lampreys killed than by using QAS. RA is currently being adopted throughout the Great Lakes as the method for assessing larval sea lamprey populations. Other fishery management programs may benefit from examining the value of their assessment programs relative to other uses of resources.

Geology and geochemistry of granitoid rocks in the Archean Northern complex, Michigan, U.S.A.

1992 ◽  
Vol 29 (8) ◽  
pp. 1674-1685 ◽  
Author(s):  
Richard T. Wilkin ◽  
Theodore J. Bornhorst
Keyword(s):  
Great Lakes ◽  
Alkali Feldspar ◽  
Superior Province ◽  
Tectonic Zone ◽  
Upper Peninsula ◽  
Tectonic Model ◽  
Granitoid Rocks ◽  
Deformation Event ◽  
Upper Peninsula Of Michigan ◽  
Granite Suite

The Northern complex, located in the Upper Peninsula of Michigan, is an Archean greenstone–granite terrane that lies at the southern margin of the Superior Province. The origin of the plutonic suites in the Northern complex can be interpreted within a plate tectonic model proposed for the Superior Province and related to northward-directed subduction and subsequent collision along the Great Lakes tectonic zone. The following plutonic suites are recognized based on intrusive relationships, as well as textural and compositional differences: (i) gneissic tonalite suite; (ii) foliated tonalite suite; (iii) trondhjemite–granite suite; (iv) hornblendite–syenite suite; and (v) late granite dike suite. Rocks in the gneissic and foliated tonalite suites have lithologic and geochemical characteristics typical of Archean trondhjemite–tonalite–granodiorite assemblages exposed elsewhere in the Superior Province. They were emplaced during a primary deformation event and are interpreted to represent partial melts that formed during north-directed subduction of oceanic crust just prior to collision along the Great Lakes tectonic zone. During a second deformation event, stocks and plugs of the trondhjemite–granite suite, derived by intracrustal melting of amphibolite associated with collision and tectonic thickening, intruded both interior and exterior to a preexisting volcanic portion of the Northern complex. The hornblendite–syenite suite, composed of hornblende-rich syenites to monzodiorites with geochemical features that include high Mg numbers, and elevated Cr and Ni content, was derived from partial melting of the mantle during collision along the Great Lakes tectonic zone. The late granite dike suite, comprising late-stage, muscovite- and biotite-bearing quartz – alkali feldspar pegmatite and finer grained granitic lithologies, represents the last magmatic event in the Northern complex emplaced after collision.

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