scholarly journals Length-weight relationships native fish of Southern Altiplano: Lauca National Park, Chile

2021 ◽  
Vol 36 (1) ◽  
pp. 285-291
Author(s):  
Pablo Rojas ◽  
Rodrigo Pardo ◽  
Irma Vila
Keyword(s):  
Author(s):  
Paige Anderson ◽  
Aida Farag ◽  
David Harper

Kelly Warm Springs is a unique geological feature located within Grand Teton National Park, Wyoming. The Kelly Warm Springs area is used extensively by park wildlife, for recreation by park visitors, and is a place of educational interest. It has also been the site of historic non-native fish releases. The current work was initiated to gather historical information and to begin systematic documentation of temperatures in and around Kelly Warm Springs. Historic information that was not published but considered valid was included. Non-native fish presence was first documented in the 1960s. Concerns about non-native fish and habitat loss for native species were discussed by researchers in the 1980s. The temperature ranges recorded at several sites October – December 2014 approached 0oC at the lower section of the outflow channel, but remained above 20oC in the spring pond. While these range below the preferred temperature range for goldfish, research has documented survival in near zero temperatures. All sites located below Mormon Row where temperature loggers were initially deployed were either dewatered or frozen by mid-November.


2017 ◽  
Vol 66 (1) ◽  
pp. 189 ◽  
Author(s):  
Dorka Cobián Rojas ◽  
Juan J. Schmitter-Soto ◽  
Alfonso Aguilar-Perera ◽  
Consuelo M. Aguilar Betancourt ◽  
Miguel Á. Ruiz-Zárate ◽  
...  

Lionfish (Pterois volitans) invaded the Caribbean region with the potential to alter the composition and structure of native coral reef fish communities. The objective of this study was to analyze the diversity indices of these fish communities potentially affected by lionfish predation and to compare with pre-invasion data. The study was undertaken in two Caribbean marine protected areas (MPAs): Guanahacabibes National Park (PNG) in W Cuba and Xcalak Reefs National Park (PNAX) in S Quintana Roo. We carried out visual censuses of fish species in reef habitats during the dry and rainy seasons of the period 2013-2015. For this, nine sites were defined and evaluated using stationary counts. Our results showed higher species richness (43.47 ± 5.14) and mean abundance (0.76 ± 1.25) in PNG than in PNAX (40.22 ± 4.96, 0.19 ± 0.46, respectively). Diversity decreased after the arrival of lionfish in a single site of PNG and in two sites of the PNAX, but apparently, these results are more related to the fishing activity effect than to the lionfish presence. Based on the results and assuming that changes in the native fish communities by lionfish may not yet be detected, we recommend to continue the monitoring community descriptions in order to detect future changes in native fish communities.


Author(s):  
Gerald Jacobi

A study of benthic macroinvertebrate communities above and below a natural barrier to fish movement (6 m high) on Raven Creek, a tributary of Pelican Creek in the Yellowstone Lake watershed, was undertaken in July, 1977. This project is part of a U.S. Fish and Wildlife Service ecological evaluation of stream sections with and without native (cutthroat) trout populations. In July 1978 a similar study was undertaken on sections of Virginia Creek with and without introduced (brook) trout populations. A final progress report will be completed by June 30, 1979.


Author(s):  
Gerald Jacobi

This is a brief report of a reconnaissance survey of the benthic macroinvertebrate community above and below a natural barrier to fish movement on Raven Creek, a tributary of Pelican Creek in the Lake Yellowstone watershed. This project is part of a U.S. Fish and Wildlife Service program to evaluate differences in stream ecology with and without native fish populations. The Final Report is due June 30, 1978.


Author(s):  
M. R. Edwards ◽  
J. D. Mainwaring

Although the general ultrastructure of Cyanidium caldarium, an acidophilic, thermophilic alga of questionable taxonomic rank, has been extensively studied (see review of literature in reference 1), some peculiar ultrastructural features of the chloroplast of this alga have not been noted by other investigators.Cells were collected and prepared for thin sections at the Yellowstone National Park and were also grown in laboratory cultures (45-52°C; pH 2-5). Fixation (glutaraldehyde-osmium), dehydration (ethanol), and embedding (Epon 812) were accomplished by standard methods. Replicas of frozenfracture d- etched cells were obtained in a Balzers apparatus. In addition, cells were examined after disruption in a French Press.


2011 ◽  
Author(s):  
Levi Zitting ◽  
Britton Mace ◽  
Grant Corser
Keyword(s):  

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