scholarly journals Individual-based model evaluation of using vaccinated hatchery fish to minimize disease spread in wild fish populations

Ecosphere ◽  
2018 ◽  
Vol 9 (2) ◽  
pp. e02116
Author(s):  
Lori N. Ivan ◽  
Travis O. Brenden ◽  
Isaac F. Standish ◽  
Mohamed Faisal
Keyword(s):  
Model Evaluation ◽  
Wild Fish ◽  
Fish Populations ◽  
Disease Spread ◽  
Individual Based Model ◽  
Hatchery Fish

Effects of Early Rearing Environment on Stress Response, Immune Function, and Disease Resistance in Juvenile Coho (Oncorhynchus kisutch) and Chinook Salmon (O.tshawytscha)

1993 ◽  
Vol 50 (4) ◽  
pp. 759-766 ◽  
Author(s):  
Kira Salonius ◽  
George K. Iwama
Keyword(s):  
Disease Resistance ◽  
Chinook Salmon ◽  
Coho Salmon ◽  
Vibrio Anguillarum ◽  
Oncorhynchus Kisutch ◽  
Significant Rise ◽  
Wild Fish ◽  
Handling Stress ◽  
Hatchery Fish ◽  
Natural Water Body

Coho (Oncorhynchus kisutch) and chinook salmon (0. tshawytscha) from aquaculture and wild environments were subjected to handling (30–60 s of netting and aerial emersion) and disease challenges. Plasma cortisol concentrations ([cortisol]pl) in both coho and chinook salmon from wild environments were significantly elevated 4 h after handling. Colonized coho salmon (hatchery-reared fish, transported into a natural water body as fry) responded in a similar fashion to wild fish, while those reared entirely in the hatchery showed no significant rise in [cortisol]pl. The responses to handling stress were retained in wild and colonized coho salmon after 7 mo of hatchery rearing. A transient increase in the leukocyte to red blood cell ratio in both wild and hatchery-reared chinook salmon occurred 4 h after handling. Handling signficantly decreased the antibody-producing cell (APC) number in wild fish and elevated their [cortisol]plrelative to hatchery fish. Wild fish had the highest APC number among the three groups before the handling. No difference in resistance to Vibrio anguillarum was apparent in coho and chinook salmon among the different rearing environments, although chinook salmon were generally more susceptible; disease resistance was reduced in wild coho salmon after 7 mo of rearing in a hatchery.

Passive gear-induced timidity syndrome in wild fish populations and its potential ecological and managerial implications

2016 ◽  
Vol 18 (2) ◽  
pp. 360-373 ◽  
Author(s):  
Robert Arlinghaus ◽  
Kate L Laskowski ◽  
Josep Alós ◽  
Thomas Klefoth ◽  
Christopher T Monk ◽  
...  
Keyword(s):  
Wild Fish ◽  
Fish Populations ◽  
Managerial Implications

Genetic Improvement of Wild Fish Populations

Science ◽  
1978 ◽  
Vol 201 (4361) ◽  
pp. 1090-1094 ◽  
Author(s):  
R. Moav ◽  
T. Brody ◽  
G. Hulata
Keyword(s):  
Genetic Improvement ◽  
Wild Fish ◽  
Fish Populations

scholarly journals Molecular Identification and Characterization of Vibrio Species and Mycobacterium Species in Wild and Cultured Marine Fish from the Eastern Mediterranean Sea

2020 ◽  
Vol 8 (6) ◽  
pp. 863 ◽  
Author(s):  
Yael Regev ◽  
Nadav Davidovich ◽  
Ran Berzak ◽  
Stanley C. K. Lau ◽  
Aviad P. Scheinin ◽  
...  
Keyword(s):  
Mediterranean Sea ◽  
Marine Fish ◽  
Eastern Mediterranean ◽  
Vibrio Species ◽  
Wild Fish ◽  
Fish Populations ◽  
Pathogenic Microorganisms ◽  
Mycobacterium Species ◽  
Eastern Mediterranean Sea ◽  
Significant Difference

In contrast to numerous documented pathogens and infectious diseases of aquaculture, there is a lack of baseline data and information regarding pathogenic agents’ prevalence in wild marine fish populations. This study focused on two common fish pathogenic microorganisms, namely Mycobacterium species and Vibrio species, both of which are known to be major causes of fish loss, occasionally to the extent of being a limiting factor in fish production. Both microorganisms are known as zoonotic agents. In total, 210 wild marine indigenous and Lessepsian fish from four different species from the eastern Mediterranean Sea were sampled and tested for Vibrio species and Mycobacterium species during a two-year period (2016–2017). Using PCR with 16S rRNA primers, we detected different strain variations of Mycobacterium species and Vibrio species and, based on the sequencing results, the overall prevalence for Vibrio species in wild fish in 2016 was significantly higher compared to 2017. No significant difference was detected for Mycobacterium species prevalence in wild fish between 2016 and 2017. In addition, 72 gilthead seabream (Sparus aurata) from an Israeli offshore marine farm were also examined during the two-year period (2017–2018). The results suggest that Mycobacterium species prevalence was significantly higher in 2018, while in 2017 there was no positive results for Mycobacterium species. In addition, there was no significant difference between both years in regard to the prevalence of Vibrio species for maricultured fish. These results highlight the necessity of continuous molecular monitoring in order to evaluate the prevalence of pathogenic microorganisms in both wild and cultured fish populations.

scholarly journals Genome-wide target enriched viral sequencing reveals extensive ‘hidden’ salmonid alphavirus diversity in farmed and wild fish populations

Aquaculture ◽  
2020 ◽  
Vol 522 ◽  
pp. 735117 ◽  
Author(s):  
Michael D. Gallagher ◽  
Iveta Matejusova ◽  
Neil M. Ruane ◽  
Daniel J. Macqueen
Keyword(s):  
Wild Fish ◽  
Fish Populations ◽  
Genome Wide ◽  
Viral Sequencing

The genetic impacts of human activities on wild fish populations

1995 ◽  
Vol 3 (2) ◽  
pp. 91-108 ◽  
Author(s):  
A. K. Sheridan
Keyword(s):  
Human Activities ◽  
Wild Fish ◽  
Fish Populations

scholarly journals Genetic impact of gadoid culture on wild fish populations: predictions, lessons from salmonids, and possibilities for minimizing adverse effects

2006 ◽  
Vol 63 (2) ◽  
pp. 198-208 ◽  
Author(s):  
Dorte Bekkevold ◽  
Michael M. Hansen ◽  
Einar E. Nielsen
Keyword(s):  
Life History Traits ◽  
Wild Population ◽  
General Trend ◽  
Fish Populations ◽  
Gene Pools ◽  
Wild Populations ◽  
Genetic Studies ◽  
Hatchery Fish ◽  
Genetic Impact ◽  
Up Scaling

Abstract Little is known about the effects of ranched gadoids escaping into wild populations, and plans for substantial up-scaling of gadoid mariculture raise concerns about detrimental effects on local gene pools. Genetic studies from salmonid populations subjected to intentional or unintentional releases of hatchery-produced fish suggest that wild gene pools are affected by introgression, but that the genetic impact can be minor relative to expectations from the often substantial numbers of released hatchery fish. However, even if resilience to introgression is a general trend, wild population fitness is still predicted to be jeopardized by releases. In this paper, we review theoretical genetic effects of escapes of cultivated individuals and the empirical evidence for introgression effects, which are based mainly on salmonid studies. Based on knowledge of gadoid population structure and life history traits, we make predictions for effects of gadoid mariculture on wild populations and discuss approaches for monitoring and minimizing introgression effects.

Factors influencing the relative fitness of hatchery and wild spring Chinook salmon (Oncorhynchus tshawytscha) in the Wenatchee River, Washington, USA

2010 ◽  
Vol 67 (11) ◽  
pp. 1840-1851 ◽  
Author(s):  
Kevin S. Williamson ◽  
Andrew R. Murdoch ◽  
Todd N. Pearsons ◽  
Eric J. Ward ◽  
Michael J. Ford
Keyword(s):  
Chinook Salmon ◽  
Oncorhynchus Tshawytscha ◽  
Parentage Analysis ◽  
Wild Fish ◽  
Relative Fitness ◽  
Male Fitness ◽  
Natural Origin ◽  
Hatchery Fish ◽  
Management And Conservation ◽  
Older Males

Understanding the relative fitness of naturally spawning hatchery fish compared with wild fish has become an important issue in the management and conservation of salmonids. We used a DNA-based parentage analysis to measure the relative reproductive success of hatchery- and natural-origin spring Chinook salmon ( Oncorhynchus tshawytscha ) in the natural environment. Size and age had a large influence on male fitness, with larger and older males producing more offspring than smaller or younger individuals. Size had a significant effect on female fitness, but the effect was smaller than on male fitness. For both sexes, run time had a smaller but still significant effect on fitness, with earlier returning fish favored. Spawning location within the river had a significant effect on fitness for both sexes. Hatchery-origin fish produced about half the juvenile progeny per parent when spawning naturally than did natural-origin fish. Hatchery fish tended to be younger and return to lower areas of the watershed than wild fish, which explained some of their lower fitness.

scholarly journals Fish hatchering and its effects on the morphology of Prochilodus lineatus (Actinopterygii: Prochilodontidae)

2016 ◽  
Vol 76 (1) ◽  
pp. 209-217
Author(s):  
S. O. Saraiva ◽  
P. S. Pompeu
Keyword(s):  
Environmental Enrichment ◽  
Morphological Variability ◽  
Survival Rates ◽  
Fish Farming ◽  
Wild Fish ◽  
Prochilodus Lineatus ◽  
Phenotypic Differences ◽  
Hatchery Fish ◽  
In Captivity ◽  
Natural Water Bodies

Abstract The fish stocking in captivity for later release into natural water bodies has historically been applied in Brazil, as a measure to mitigate impacts caused by dams. However, the released fish are adapted to the hatchery environment, which is totally different from the natural, which results in low post-release survival rates and ineffectiveness of stocking as a management measure. Worldwide, several studies have demonstrated the existence of large phenotypic differences between farmed and wild fish, but in Brazil, there is a great need for this kind of study. Based on this, our objective here was to verify if hatchery fish differ morphologically from its wild counterparties, at the same size class. Hence, a population of young Prochilodus lineatus raised in a fish farming station was compared with another from marginal lagoons of the Grande river. The results indicated that the fish farming resulted in morphologically different individuals of P. lineatus and a less diverse population, compared with wild fish. Measures such as environmental enrichment of hatchery tanks should be studied as a way to increase environmental heterogeneity and increase the morphological variability of the fingerlings produced.

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