Comparisons of Haul Seine and Otter Trawl Catches of Black Crappie and the Evaluation of Haul Seines for Future Research

2010 ◽  
Vol 30 (4) ◽  
pp. 964-975 ◽  
Author(s):  
Travis Tuten ◽  
Will A. Strong ◽  
Eric J. Nagid ◽  
Marty M. Hale
Keyword(s):  
Otter Trawl ◽  
Future Research ◽  
Haul Seine ◽  
Trawl Catches

Mesopelagic Fishes from the Gulf of Maine and the Adjacent Continental Slope

1973 ◽  
Vol 30 (1) ◽  
pp. 134-137 ◽  
Author(s):  
John A. Musick
Keyword(s):  
Continental Slope ◽  
Gulf Of Maine ◽  
Cold Water ◽  
Otter Trawl ◽  
Midwater Trawl ◽  
First Time ◽  
Trawl Catches

Otter-trawl records and midwater-trawl catches suggested that some mesopelagic fishes are permanent members of the midwater fauna of the Gulf of Maine rather than strays. Benthosema glaciale, Ceratoscopelus maderensis, Myctophum punctatum, and Maurolicus muelleri, cold water or ubiquitous species, occur in the Gulf throughout the year, and warmwater species derived from adjacent Slope Water offshore were captured in the Gulf during the summer and fall. Nine species of mesopelagic fishes are here recorded from the Gulf for the first time.

Biology of the Morid Fish Antimora rostrata in the Western North Atlantic

1977 ◽  
Vol 34 (12) ◽  
pp. 2362-2368 ◽  
Author(s):  
Charles A. Wenner ◽  
John A. Musick
Keyword(s):  
Life History ◽  
North Atlantic ◽  
Otter Trawl ◽  
Middle Atlantic ◽  
Antimora Rostrata ◽  
Feeding Habitat ◽  
Eastern North Atlantic ◽  
Average Size ◽  
Depth Relationship ◽  
Trawl Catches

From otter trawl catches in the Middle Atlantic Bight, blue hake, Antimora rostrata, were found at depths of 790 to at least 2930 m in the Norfolk Canyon area; maximum abundance was between 1300 and 2500 m. Available data indicate that the blue hake is more abundant in the western than the eastern North Atlantic. Males were smaller in average size than females and a skewed sex–depth relationship was found with a larger percentage of the catch in shallower depths being male. In Canadian Atlantic waters A. rostrata live in water at least 500 m shallower. The Middle Atlantic continental slope may serve as a feeding habitat for this species; the reproductive and larval portions of its life history are probably completed in the northern part of its range. Key words: Antimora rostrata, bathymétrie distribution, reproduction

Size at Maturity, Spawning Season, and Food of Atlantic Halibut

1967 ◽  
Vol 24 (1) ◽  
pp. 53-66 ◽  
Author(s):  
A. C. Kohler
Keyword(s):  
Spawning Season ◽  
Otter Trawl ◽  
Atlantic Halibut ◽  
Size At Maturity ◽  
Hippoglossus Hippoglossus ◽  
Trawl Catches

In otter-trawl catches of Atlantic halibut (Hippoglossus hippoglossus L.) by research vessels from 1959 to 1964, mature males less than 66 to 70 cm long were not regularly encountered. Males were 96 to 100 cm long before the majority were mature, and females slightly longer. The research catches and commercial samples taken by longline from 1961 to 1963 indicated that spawning occurred at various times during the first half of the year. Halibut up to 30 cm long ate invertebrates; from 30 to 80 cm, invertebrates and fish; and over 80 cm, fish almost exclusively.

Age, Maturity, Spawning and Food of Burbot, Lota lota, in Lake Winnipeg

1955 ◽  
Vol 12 (6) ◽  
pp. 930-940 ◽  
Author(s):  
L. C. Hewson
Keyword(s):  
Growth Rate ◽  
Otter Trawl ◽  
Insect Larvae ◽  
Lake Winnipeg ◽  
Lota Lota ◽  
Weight Relationship ◽  
Gill Net ◽  
Significant Difference ◽  
Trawl Catches

Burbot are common in Lake Winnipeg; 886 were taken as a sample. Trap-net and otter-trawl catches are more representative of the population than gill-net catches. A significant difference in length-weight relationship exists between two localities. Ages were determined from otoliths. Heavier exploitation in the northern part of the lake probably accelerated the growth rate. Age-6 burbot there weighed 3.4 pounds compared with 2.6 pounds in the southern part. Spawning begins about January 31 and lasts 3 weeks. The smaller burbot feed mainly on insect larvae, the larger burbot on fish and crayfish.

Parasite defense mechanisms in bees: behavior, immunity, antimicrobials, and symbionts

2019 ◽  
Vol 4 (1) ◽  
pp. 59-76 ◽  
Author(s):  
Alison E. Fowler ◽  
Rebecca E. Irwin ◽  
Lynn S. Adler
Keyword(s):  
Defense Mechanisms ◽  
Poor Quality ◽  
Future Research ◽  
Immune Priming ◽  
Social Bees ◽  
Bee Health ◽  
Landscape Scales ◽  
And Function ◽  
Solitary Species

Parasites are linked to the decline of some bee populations; thus, understanding defense mechanisms has important implications for bee health. Recent advances have improved our understanding of factors mediating bee health ranging from molecular to landscape scales, but often as disparate literatures. Here, we bring together these fields and summarize our current understanding of bee defense mechanisms including immunity, immunization, and transgenerational immune priming in social and solitary species. Additionally, the characterization of microbial diversity and function in some bee taxa has shed light on the importance of microbes for bee health, but we lack information that links microbial communities to parasite infection in most bee species. Studies are beginning to identify how bee defense mechanisms are affected by stressors such as poor-quality diets and pesticides, but further research on this topic is needed. We discuss how integrating research on host traits, microbial partners, and nutrition, as well as improving our knowledge base on wild and semi-social bees, will help inform future research, conservation efforts, and management.

Dicarbonyl derived post-translational modifications: chemistry bridging biology and aging-related disease

2020 ◽  
Vol 64 (1) ◽  
pp. 97-110
Author(s):  
Christian Sibbersen ◽  
Mogens Johannsen
Keyword(s):  
Mass Spectrometry ◽  
Future Research ◽  
Amino Acid Residues ◽  
Post Translational Modification ◽  
Dicarbonyl Compounds ◽  
Protein Targets ◽  
Post Translational Modifications ◽  
Reactive Protein ◽  
Glycation End Products ◽  
Direct Mass Spectrometry

Abstract In living systems, nucleophilic amino acid residues are prone to non-enzymatic post-translational modification by electrophiles. α-Dicarbonyl compounds are a special type of electrophiles that can react irreversibly with lysine, arginine, and cysteine residues via complex mechanisms to form post-translational modifications known as advanced glycation end-products (AGEs). Glyoxal, methylglyoxal, and 3-deoxyglucosone are the major endogenous dicarbonyls, with methylglyoxal being the most well-studied. There are several routes that lead to the formation of dicarbonyl compounds, most originating from glucose and glucose metabolism, such as the non-enzymatic decomposition of glycolytic intermediates and fructosyl amines. Although dicarbonyls are removed continuously mainly via the glyoxalase system, several conditions lead to an increase in dicarbonyl concentration and thereby AGE formation. AGEs have been implicated in diabetes and aging-related diseases, and for this reason the elucidation of their structure as well as protein targets is of great interest. Though the dicarbonyls and reactive protein side chains are of relatively simple nature, the structures of the adducts as well as their mechanism of formation are not that trivial. Furthermore, detection of sites of modification can be demanding and current best practices rely on either direct mass spectrometry or various methods of enrichment based on antibodies or click chemistry followed by mass spectrometry. Future research into the structure of these adducts and protein targets of dicarbonyl compounds may improve the understanding of how the mechanisms of diabetes and aging-related physiological damage occur.

Effect of Teacher Training Sessions on Listener Perception of Voice Disorders

1985 ◽  
Vol 16 (1) ◽  
pp. 25-28 ◽  
Author(s):  
Nicholas J. DeGregorio ◽  
Nancy Gross Polow
Keyword(s):  
Teacher Training ◽  
School System ◽  
Voice Disorders ◽  
Future Research ◽  
Speech Language Pathologists ◽  
Speech Language Pathologist ◽  
Bergen County ◽  
Experimental Group

The present study was designed to investigate the effect of teacher training sessions on listener perception of voice disorders. Three ASHA certified speech-language pathologists provided the criteria mean. Thirty randomly selected teachers from a Bergen County school system, randomly placed into two groups, served as subjects. The experimental group received three training sessions on consecutive weeks. Three weeks after the end of training, both groups were given a posttest. Listener perception scores were significantly higher for the experimental group. The implications of these results for in-service workshops, teacher/speech-language pathologist interaction and future research are discussed.

Comparative Effects of High-Tech Visual Scene Displays and Low-Tech Isolated Picture Symbols on Engagement From Students With Multiple Disabilities

2019 ◽  
Vol 50 (4) ◽  
pp. 693-702 ◽  
Author(s):  
Christine Holyfield ◽  
Sydney Brooks ◽  
Allison Schluterman
Keyword(s):  
Language Learning ◽  
Augmentative And Alternative Communication ◽  
Visual Analysis ◽  
Multiple Disabilities ◽  
Visual Scene ◽  
Future Research ◽  
High Tech ◽  
Single Subject ◽  
Wide Range ◽  
The Difference

Purpose Augmentative and alternative communication (AAC) is an intervention approach that can promote communication and language in children with multiple disabilities who are beginning communicators. While a wide range of AAC technologies are available, little is known about the comparative effects of specific technology options. Given that engagement can be low for beginning communicators with multiple disabilities, the current study provides initial information about the comparative effects of 2 AAC technology options—high-tech visual scene displays (VSDs) and low-tech isolated picture symbols—on engagement. Method Three elementary-age beginning communicators with multiple disabilities participated. The study used a single-subject, alternating treatment design with each technology serving as a condition. Participants interacted with their school speech-language pathologists using each of the 2 technologies across 5 sessions in a block randomized order. Results According to visual analysis and nonoverlap of all pairs calculations, all 3 participants demonstrated more engagement with the high-tech VSDs than the low-tech isolated picture symbols as measured by their seconds of gaze toward each technology option. Despite the difference in engagement observed, there was no clear difference across the 2 conditions in engagement toward the communication partner or use of the AAC. Conclusions Clinicians can consider measuring engagement when evaluating AAC technology options for children with multiple disabilities and should consider evaluating high-tech VSDs as 1 technology option for them. Future research must explore the extent to which differences in engagement to particular AAC technologies result in differences in communication and language learning over time as might be expected.

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