Species‐specific schooling behaviour of fish in the freshwater pelagic habitat: an observational study

2020 ◽  
Vol 97 (1) ◽  
pp. 64-74 ◽  
Author(s):  
Michaela Holubová ◽  
Petr Blabolil ◽  
Martin Čech ◽  
Mojmír Vašek ◽  
Jiří Peterka
Keyword(s):  
Observational Study ◽  
Schooling Behaviour ◽  
Pelagic Habitat ◽  
Species Specific

Lake and species specific patterns of non-diadromous recruitment in amphidromous fish: the importance of local recruitment and habitat requirements

2017 ◽  
Vol 68 (12) ◽  
pp. 2315 ◽  
Author(s):  
Andy S. Hicks ◽  
Matt G. Jarvis ◽  
Bruno O. David ◽  
Jonathan M. Waters ◽  
Marc D. Norman ◽  
...  
Keyword(s):  
Life Histories ◽  
Larval Fish ◽  
Early Life History ◽  
Migratory Species ◽  
Pelagic Habitat ◽  
Dominant Process ◽  
Local Recruitment ◽  
Species Specific ◽  
Management And Conservation

Understanding migratory life histories is critical for the effective management and conservation of migratory species. However, amphidromous migrations (fish hatch in streams, immediately migrate to the sea for a feeding period and return to fresh water as juveniles) remain understudied owing to the difficulties of tracking tiny larval fish. Despite this, it has widely been assumed that amphidromous fish have open, resilient populations, with marine-rearing larvae dispersing widely during their pelagic phase. In the present study we tested the hypothesis that when an alternative freshwater pelagic habitat is available, non-diadromous recruitment will be the dominant process in sustaining amphidromous fish populations, with implications for their connectivity and resilience. Otolith microchemical analyses of five species (three Galaxias (Galaxiidae), two Gobiomorphus (Eleotridae)) from paired systems on the South Island of New Zealand indicated that when a suitable freshwater pelagic habitat existed downstream, non-diadromous recruitment was the primary population-sustaining process, typically contributing >90% of recruits. In addition, not all species recruited from all lakes, indicating the importance of the largely unstudied role of species-specific amphidromous larval requirements. The results of the present study emphasise the need to better understand the dynamics of individual populations of amphidromous fish, and highlight the importance of understanding species-specific early life history requirements to fully understand their distributions and management needs.

Electron Microscopy in the Study of Natural Phytoplankton Assemblages

1985 ◽  
Vol 43 ◽  
pp. 620-623
Author(s):  
Linda Sicko-Goad
Keyword(s):  
Electron Microscopy ◽  
Aquatic Environment ◽  
Size Range ◽  
Physical Parameters ◽  
Specific Information ◽  
Phytoplankton Assemblages ◽  
Phytoplankton Productivity ◽  
Ecosystem Effects ◽  
Time Of Year ◽  
Species Specific

Although the use of electron microscopy and its varied methodologies is not usually associated with ecological studies, the types of species specific information that can be generated by these techniques are often quite useful in predicting long-term ecosystem effects. The utility of these techniques is especially apparent when one considers both the size range of particles found in the aquatic environment and the complexity of the phytoplankton assemblages.The size range and character of organisms found in the aquatic environment are dependent upon a variety of physical parameters that include sampling depth, location, and time of year. In the winter months, all the Laurentian Great Lakes are uniformly mixed and homothermous in the range of 1.1 to 1.7°C. During this time phytoplankton productivity is quite low.

64: Rapid, Species-Specific Detection of Uropathogens from Clinical Urine Specimens Using an Electrochemical Microsensor Array

2005 ◽  
Vol 173 (4S) ◽  
pp. 18-18
Author(s):  
Joseph C. Liao ◽  
Mitra Mastali ◽  
David A. Haake ◽  
Bernard M. Churchill
Keyword(s):  
Specific Detection ◽  
Species Specific ◽  
Urine Specimens

First clinical experience with the Multi-LOC multiple stent delivery system for focal stenting in long femoro-popliteal lesions

VASA ◽  
2017 ◽  
Vol 46 (6) ◽  
pp. 452-461 ◽  
Author(s):  
Klaus Amendt ◽  
Ulrich Beschorner ◽  
Matthias Waliszewski ◽  
Martin Sigl ◽  
Ralf Langhoff ◽  
...  
Keyword(s):  
Observational Study ◽  
Clinical Experience ◽  
Delivery System ◽  
Target Lesion ◽  
Lesion Length ◽  
Elastic Recoil ◽  
Delivery Device ◽  
Clinical Assessments ◽  
Balloon Catheters ◽  
Considerable Length

Abstract. Background: The purpose of this observational study is to report the six-month clinical outcomes with a new multiple stent delivery system in patients with femoro-popliteal lesions. Patients and methods: The LOCOMOTIVE study is an observational multicentre study with a primary endpoint target lesion revascularization (TLR) rate at six months. Femoro-popliteal lesions were prepared with uncoated and/or paclitaxel-coated peripheral balloon catheters. When flow limiting dissections, elastic recoil or recoil due to calcification required stenting, up to six short stents per delivery device, each 13 mm in length, were implanted. Sonographic follow-ups and clinical assessments were scheduled at six months. Results: For this first analysis, a total of 75 patients 72.9 ± 9.2 years of age were enrolled. The majority of the 176 individually treated lesions were in the superficial femoral artery (76.2 %, 134/176) whereas the rate of TASC C/D amounted to 51.1 % (90/176). The total lesion length was 14.5 ± 9.0 cm with reference vessel diameters of 5.6 ± 0.7 mm. Overall 47 ± 18 % of lesion lengths could be saved from stenting. At six months, the patency was 90.7 % (68/75) and all-cause TLR rates were 5.3 % (4/75) in the overall cohort. Conclusions: The first clinical experience at six months suggests that the MSDS strategy was safe and effective to treat femoro-popliteal lesions of considerable length (14.5 ± 9.0 cm). Almost half of the lesion length could be saved from stenting while patency was high and TLR rates were acceptably low.

Prospective Observational Study of Sleep and PTSD Symptoms in Patients Undergoing PTSD Treatment

2009 ◽  
Author(s):  
Ihori Kobayashi ◽  
Brian Hall ◽  
Courtney Hout ◽  
Vanessa Springston ◽  
Patrick Palmieri
Keyword(s):  
Observational Study ◽  
Prospective Observational Study ◽  
Ptsd Symptoms ◽  
Ptsd Treatment
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