Article
Biodiversity Conservation
Michael P. P. Carey, Gordon H. H. Reeves, Suresh A. A. Sethi, Theresa L. L. Tanner, Daniel B. B. Young, Krista K. K. Bartz, Christian E. E. Zimmerman
Summary: Invasive species introductions in high latitudes are increasing, and the effects of Elodea spp. on Subarctic and Arctic ecosystems, specifically its impact on fish life history, are still poorly understood. This study conducted a field experiment and found that Elodea spp. stands in a lake near Cordova, Alaska, led to reduced growth and lower trophic position for juvenile coho salmon compared to habitats dominated by native aquatic plants. The presence of Elodea spp. altered the energy flow to juvenile salmon by restructuring space and affecting prey resources, potentially leading to population-level impacts on salmon returns.
BIOLOGICAL INVASIONS
(2023)
Article
Agriculture, Dairy & Animal Science
Qin Zhang, Fanghui Li, Mengjie Guo, Meilan Qin, Jiajing Wang, Hairui Yu, Jian Xu, Yongqiang Liu, Tong Tong
Summary: Fish meal is no longer sufficient for aquatic feed protein source and soybean meal is a good alternative. However, soybean meal contains anti-nutritional factors. This study examined the effects of replacing 10% fish meal protein with fermented soybean meal protein supplementation on the growth and immune response of juvenile coho salmon. The results showed that the supplementation significantly influenced gene expression, growth performance, and antioxidant and immunity capacity of the juveniles.
Review
Oceanography
William D. P. Duguid, Thomas W. Iwanicki, Jessica Qualley, Francis Juanes
Summary: Fine-scale spatial and temporal variation in physical and biological oceanography, as well as juvenile Chinook Salmon distribution, size, diet, and growth, were observed in the Southern Gulf Islands of the Salish Sea. The availability of prey, particularly Pacific Herring, influenced the stomach fullness and growth of Chinook Salmon. Different foraging strategies, including specializing on Pacific Herring or targeting small crustacean zooplankton, were observed among individuals.
PROGRESS IN OCEANOGRAPHY
(2021)
Article
Environmental Sciences
Feng Lin, Lucie Baillon, Valerie S. Langlois, Christopher J. Kennedy
Summary: The study found that exposure to diluted bitumen resulted in higher mortality and reduced growth in pink salmon under high temperature, low temperature, and high salinity environments. Additionally, exposure affected the biochemical levels and whole organism of fish, with effects exacerbated by environmental factors such as temperature and salinity.
MARINE ENVIRONMENTAL RESEARCH
(2021)
Article
Environmental Sciences
Jason Hall, Phil Roni, Kai Ross, Meghan J. Camp, Jason Nuckols, Claire Ruffing
Summary: This study estimated the carrying capacities of juvenile salmon habitat by analyzing published density data. The results showed that some habitats will experience a decrease of 2% to 54% in carrying capacity with sea level rise, while others will see an increase of 1% to 320%. The carrying capacity estimates can be used to evaluate and design restoration projects for salmon habitat.
ESTUARIES AND COASTS
(2023)
Article
Agriculture, Dairy & Animal Science
Victor Martinez, Phillip J. Dettleff, Nicolas Galarce, Cristian Bravo, Jessica Dorner, Robert N. Iwamoto, Kerry Naish
Summary: Understanding the genetic status of aquaculture strains is crucial for sustainable management. Coho salmon in Chile's aquaculture industry has faced various events that have shaped its genome. Comparisons with strains from other countries revealed differences in effective population size, highlighting the need for measures to maintain genetic diversity and long-term sustainability.
Article
Multidisciplinary Sciences
Brandon Chasco, Brian Burke, Lisa Crozier, Rich Zabel
Summary: Large-scale atmospheric conditions in the Northeast Pacific Ocean affect freshwater and marine environments in specific regions, ultimately impacting the survival rates of migrating species like salmonids. Understanding the correlations between habitats is crucial for predicting and managing the survival of salmon populations in changing environmental conditions.
Article
Multidisciplinary Sciences
Elizabeth M. Phillips, John K. Horne, Jeannette E. Zamon
Summary: Predation mortality can affect the distribution and abundance of fish populations. This study found that juvenile salmon are often exposed to avian predators in the coastal waters, and predation risk decreases when alternative prey are present. Additionally, predation risk is higher in turbid waters and decreases with water clarity.
Article
Fisheries
Cong-mei Xu, Hai-rui Yu, Qin Zhang, Ling-yao Li, Jing-jing Fan, Meng-jie Guo, Fang-hui Li, Xiang-yi Qiu, Ling-ling Shan
Summary: A 12-week feeding trial was conducted to examine the effects of dietary protein concentrations on the growth, whole-body chemical composition, and hepatic anti-oxidant enzyme activities of coho salmon alevins. The results showed that diets with higher protein concentrations led to higher growth rate and lower feed conversion ratio. Additionally, the higher protein diet also increased hepatic anti-oxidant enzyme activities.
AQUACULTURE INTERNATIONAL
(2022)
Article
Biotechnology & Applied Microbiology
Michelle T. T. Chan, Annette Muttray, Dionne Sakhrani, Krista Woodward, Jin-Hyoung Kim, Kris A. Christensen, Ben F. Koop, Robert H. Devlin
Summary: Transgenic fish, such as the GH transgenic coho salmon strain, show significant differences in growth rate and phenotypes compared to wild-type fish. Sex and transgene insertion sites alter transgene expression, while estradiol levels do not directly influence transgene activity. This study highlights the impact of genetic factors and transgene insertion sites on transgene expression and phenotype.
MARINE BIOTECHNOLOGY
(2021)
Article
Fisheries
Dengjun Zhang, Geir Sogn-Grundvag, Ragnar Tveteras
Summary: Sea lice infections pose a significant challenge to salmon farming and wild salmon stocks, leading to strict regulations. The Norwegian government implemented the Traffic Light System (TLS) in 2017 to control salmon production based on sea lice-induced mortality. This study examines the impact of sea lice on harvest behavior of salmon farmers and finds that farmers tend to increase harvest speed with higher sea lice levels, but slow down during delousing operations. The TLS implementation further exacerbates the negative effects of delousing on harvest quantities.
Article
Multidisciplinary Sciences
Dina K. Spangenberg, Abby E. Fuhrman, Donald A. Larsen, Brian R. Beckman
Summary: Regulation of lipid stores is crucial for fish physiology and ecology, as seasonal changes in lipid stores are linked to survival during periods of food deprivation. This study investigated the correlation between a seasonally changing photoperiod and changes in energetic status in juvenile Chinook salmonids. The results suggest that regardless of age or size, there is a correlation between seasonal changes in photoperiod and changes in body composition.
Article
Fisheries
Xu Cong-mei, Yu Hai-rui, Qin Zhang, Bing-bing Chen, Ling-yao Li, Xiang-yi Qiu, Tian Qi, Jin-qian Liu, Ling-ling Shan
Summary: The feeding trial showed that increasing dietary phosphorus levels improved growth performance and digestive enzyme activities of coho salmon alevins. However, excess dietary phosphorus levels resulted in reduced feed conversion rate. The study also determined the specific dietary phosphorus requirement levels for coho salmon alevins.
AQUACULTURE NUTRITION
(2021)
Article
Fisheries
Malthe Hvas, Jonatan Nilsson, Tone Vagseth, Velimir Nola, Per Gunnar Fjelldal, Tom Johnny Hansen, Frode Oppedal, Lars Helge Stien, Ole Folkedal
Summary: The study shows that Atlantic salmon exhibit compensatory growth after fasting, eventually reaching similar weight and length as fed controls. Males were larger than females, and immature fish were larger than maturing fish. No aggressions were observed during the fasting period, and welfare status was not impacted in the short or long term.
Article
Multidisciplinary Sciences
Amy Long, Simon R. M. Jones
Summary: Salmonid rickettsial septicemia is an emergent disease caused by Piscirickettsia salmonis in marine-farmed salmonids. The study found species-specific patterns of bacterial shedding and pathogenesis, as well as correlations between physiological parameters and bacterial burden in different fish species. The timing and magnitude of bacterial shedding in infected fish align with mortality, providing insights for pathogen transmission models.
Article
Oceanography
Jason A. Law, Robert H. Weisberg, Yonggang Liu, Dennis A. Mayer, Jeffrey C. Donovan
Summary: Time series data from a moored array of sensors are used to describe the long-term mean circulation and seasonal variations on the West Florida Continental Shelf. The observations reveal a coherent shelf-wide circulation pattern with alongshore and down-coast flow, and a coastal jet separating an upwelling region from a downwelling region influenced by the deeper ocean.
DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY
(2024)