Transporting Endangered Fish Species in Plastic Bags

1981 ◽  
Vol 43 (4) ◽  
pp. 212-213 ◽  
Author(s):  
Roger L. Hamman
Keyword(s):  
Fish Species ◽  
Endangered Fish ◽  
Plastic Bags

scholarly journals Freshwater Fish Species of the Oorlogskloof River, Northern Cape Province, South Africa

Our Nature ◽  
2013 ◽  
Vol 10 (1) ◽  
pp. 8-16
Author(s):  
P.P. Ramollo ◽  
M. Schumann ◽  
W.A.J. Pretorius
Keyword(s):  
South Africa ◽  
Freshwater Fish ◽  
Relative Abundance ◽  
Fish Species ◽  
Freshwater Fishes ◽  
Endangered Fish ◽  
Freshwater Fish Species ◽  
Northern Cape

The freshwater fish of Oorlogskloof River were sampled in March 2010. The study aimed to determine the distribution and relative abundance of freshwater fish in the Oorlogskloof River. A total of 4643individuals represented by five fish species belonging to two families were sampled. The Barbus anoplus was only sampled in the upper reaches of the Oorlogskloof River gorge while endangered Labeobarbus capensis appeared downstream in the Oorlogskloof River. Barbus serra dominated the fish species in the system. The invasion of Tilapia sparmanni in this system was confirmed during the survey andthe species appeared to be widespread throughout the system. At this stage it does not appear to be posing a serious threat to the endangered fish species. The Oorlogskloof River can be considered as a potential refuge site for the conservation of some endemic and threatened freshwater fishes of South Africa.DOI: http://dx.doi.org/10.3126/on.v10i1.7746

River basin-related genetic structuring in an endangered fish species, Chondrostoma lusitanicum, based on mtDNA sequencing and RFLP analysis

Heredity ◽  
2001 ◽  
Vol 86 (3) ◽  
pp. 253-264 ◽  
Author(s):  
Natacha Mesquita ◽  
Gary Carvalho ◽  
Paul Shaw ◽  
Eduardo Crespo ◽  
Maria Manuela Coelho
Keyword(s):  
River Basin ◽  
Fish Species ◽  
Rflp Analysis ◽  
Genetic Structuring ◽  
Endangered Fish

Changes in reproductive biomarkers in an endangered fish species (bonytail chub, Gila elegans) exposed to low levels of organic wastewater compounds in a controlled experiment

2009 ◽  
Vol 95 (2) ◽  
pp. 133-143 ◽  
Author(s):  
David B. Walker ◽  
Nicholas V. Paretti ◽  
Gail Cordy ◽  
Timothy S. Gross ◽  
Steven D. Zaugg ◽  
...  
Keyword(s):  
Fish Species ◽  
Controlled Experiment ◽  
Endangered Fish ◽  
Low Levels ◽  
Organic Wastewater

scholarly journals Prompt assessment of the potential spawning areas of Sevan trout in the South-West part of Lake Sevan

2017 ◽  
Vol 18 (1) ◽  
pp. 222-232 ◽  
Author(s):  
V. L. Asatryan ◽  
N. E. Barseghyan ◽  
M. R. Dallakyan ◽  
T. V. Vardanyan
Keyword(s):  
Fish Species ◽  
The South ◽  
Time Saving ◽  
Lake Sevan ◽  
Endangered Fish ◽  
Critically Endangered Species ◽  
South West ◽  
Natural Reproduction ◽  
Spawning Areas ◽  
West Part

Abstract Sevan trout is an endemic fish species, registered in the Red Data Book of Armenian Animals as a ‘Critically Endangered’ species (IUCN category: CR A2cd) and is one of the most valuable fish of the Armenian ichthyofauna. For the purpose of preservation of this endangered fish species, rivers in the South-West part of Lake Sevan have been studied and their potential for spawning has been assessed through a relatively ‘cheap’ and ‘time-saving’ approach developed on the basis of hydrophysical, hydrochemical and hydrobiological studies. The results have shown that the highest potential to support natural reproduction of Sevan trout is in the middlestream part of Lichq river, as well as in the downstream part of Bakhtak river and the part of Bakhtak-Tsakqar system near the connection of the Bakhtak and Tsakqar rivers; however, all these areas need some remediation to achieve ‘high potential’.

Hydrological impacts affecting endangered fish species: a Spanish case study

2007 ◽  
Vol 23 (5) ◽  
pp. 511-523 ◽  
Author(s):  
Rafael Sánchez Navarro ◽  
Michael Stewardson ◽  
Pascal Breil ◽  
Diego García de Jalón ◽  
Michael Eisele
Keyword(s):  
Fish Species ◽  
Endangered Fish ◽  
Hydrological Impacts

Cyanobacteria blooms induce embryonic heart failure in an endangered fish species

2018 ◽  
Vol 194 ◽  
pp. 78-85 ◽  
Author(s):  
Jinmei Zi ◽  
Xiaofu Pan ◽  
Hugh J. MacIsaac ◽  
Junxing Yang ◽  
Runbing Xu ◽  
...  
Keyword(s):  
Heart Failure ◽  
Fish Species ◽  
Embryonic Heart ◽  
Endangered Fish ◽  
Cyanobacteria Blooms

scholarly journals Resumption of spermatogenesis in senescent goldfish Carassius auratus (Linnaeus, 1758) through spermatogonial cell therapy

2018 ◽  
Author(s):  
Sullip Kumar Majhi ◽  
Labrechai Mog Chowdhury ◽  
Santosh Kumar ◽  
Rajeev Kumar Singh ◽  
Vindhya Mohindra ◽  
...  
Keyword(s):  
Stem Cell ◽  
Cell Therapy ◽  
Stem Cell Therapy ◽  
Fish Species ◽  
Carassius Auratus ◽  
Endangered Fish ◽  
Goldfish Carassius Auratus ◽  
Male Donor ◽  
Manual Pressure ◽  
Urogenital Papilla

AbstractIn recent times, stem cell research has gained considerable prominence because of its applications in assisted reproductive technology and the treatment of deadly diseases. In teleost fishes, spermatogonial stem cells have been effectively used to produce progeny of difficult-to-breed fish species and/or commercially valuable species through the surrogacy technique. The present study is the first report of an innovative application of stem cell therapy in teleostean fish species for revitalising the reproductive competence of senescent individuals. Senescent male goldfish, Carassius auratus aged approximately 10 years were procured from an ornamental fish-breeding farm and were reared locally for an additional 2 years. The senescence of the fish was evaluated and confirmed using histological analysis, gonadal index assessment, and germ-cell specific vasa gene expression. Analyses revealed the absence of spermatogonial cells and other germ cells in the testes of the senescent fish (n = 5). Spermatogonial cells from a prepubertal C. auratus male donor were isolated using discontinuous percoll gradients, labelled with the fluorescent dye PKH-26, and transplanted into the gonads of senescent C. auratus males through the urogenital papilla. Six months after the therapy, spermatozoa from males were collected through applying gentle manual pressure on the abdomen and were observed under the microscope. All the senescent therapy-treated C. auratus males produced spermatozoa from the transplanted cells; this was confirmed by retention of PKH-26 in the spermatozoa and diagnostic SSR locus. The senescent males were crossed with gravid C. auratus females through artificial insemination and natural spawning, and viable progeny was produced. These observations suggest that the reproductive competence of senescent individuals of commercially valuable and/or endangered fish species can be revitalised and extended through spermatogonia stem cell therapy to produce functional gametes.

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