Secondary contact and changes in coastal habitat availability influence the nonequilibrium population structure of a salmonid (Oncorhynchus keta).
Mol Ecol. 2013 Dec;22(23):5848-60
Authors: Petrou EL, Hauser L, Waples RS, Seeb JE, Templin WD, Gomez-Uchida D, Seeb LW
Numerous empirical studies have reported lack of migration-drift equilibrium in wild populations. Determining the causes of nonequilibrium population structure is challenging because different evolutionary processes acting at a variety of spatiotemporal scales can produce similar patterns.
High-throughput sequencing and pathway analysis reveal alteration of the pituitary transcriptome by 17α-ethynylestradiol (EE2) in female coho salmon, Oncorhynchus kisutch.
Aquat Toxicol. 2013 Oct 15;142-143:146-63
Authors: Harding LB, Schultz IR, Goetz GW, Luckenbach JA, Young G, Goetz FW, Swanson P
Considerable research has been done on the effects of endocrine disrupting chemicals (EDCs) on reproduction and gene expression in the brain, liver and gonads of teleost fish, but information on impacts to the pituitary gland are still limited despite its central role in regulating reproduction.
Diversity of movements by individual anadromous coastal cutthroat trout Oncorhynchus clarkii clarkii.
J Fish Biol. 2013 Nov;83(5):1161-82
Authors: Goetz FA, Baker B, Buehrens T, Quinn TP
Wild, downstream-migrating cutthroat trout, Oncorhynchus clarkii clarkii, smolts and adults were captured at a weir in Big Beef Creek, Hood Canal, Washington, surgically implanted with acoustic tags and tracked to identify spring and summer movements using stationary receivers in order to test the assumption that the species moves little while in marine waters.
Integrating scientific guidance into marine spatial planning.
Proc Biol Sci. 2014;281(1781):20132252
Authors: Rassweiler A, Costello C, Hilborn R, Siegel DA
Marine spatial planning (MSP), whereby areas of the ocean are zoned for different uses, has great potential to reduce or eliminate conflicts between competing management goals, but only if strategically applied. The recent literature overwhelmingly agrees that including stakeholders in these planning processes is critical to success; but, given the countless alternative ways even simple spatial regulations can be configured, how likely is it that a stakeholder-driven process will generate plans that deliver on the promise of MSP?
Evolution of age and length at maturation of Alaskan salmon under size-selective harvest.
Evol Appl. 2014 Feb;7(2):313-22
Authors: Kendall NW, Dieckmann U, Heino M, Punt AE, Quinn TP
Spatial and temporal trends and variation in life-history traits, including age and length at maturation, can be influenced by environmental and anthropogenic processes, including size-selective exploitation. Spawning adults in many wild Alaskan sockeye salmon populations have become shorter at a given age over the past half-century, but their age composition has not changed.
Genetic and morphometric divergence in threespine stickleback in the Chignik catchment, Alaska.
Ecol Evol. 2014 Jan;4(2):144-56
Authors: Taugbøl A, Junge C, Quinn TP, Herland A, Vøllestad LA
Divergent selection pressures induced by different environmental conditions typically lead to variation in life history, behavior, and morphology. When populations are locally adapted to their current environment, selection may limit movement into novel sites, leading to neutral and adaptive genetic divergence in allopatric populations.
Injuries from non-retention in gillnet fisheries suppress reproductive maturation in escaped fish.
PLoS One. 2013;8(7):e69615
Authors: Baker MR, Swanson P, Young G
Exploitation of fisheries resources has unintended consequences, not only in the bycatch and discard of non-target organisms, but also in damage to targeted fish that are injured by gear but not landed (non-retention). Delayed mortality due to non-retention represents lost reproductive potential in exploited stocks, while not contributing to harvest.
An Inherited Magnetic Map Guides Ocean Navigation in Juvenile Pacific Salmon.
Curr Biol. 2014 Feb 5;
Authors: Putman NF, Scanlan MM, Billman EJ, O’Neil JP, Couture RB, Quinn TP, Lohmann KJ, Noakes DL
Migratory marine animals exploit resources in different oceanic regions at different life stages, but how they navigate to specific oceanic areas is poorly understood [1-3]. A particular challenge is explaining how juvenile animals with no prior migratory experience are able to locate specific oceanic feeding habitats that are hundreds or thousands of kilometers from their natal sites [1-7].
Fish species introductions provide novel insights into the patterns and drivers of phylogenetic structure in freshwaters.
Proc Biol Sci. 2014;281(1778):20133003
Authors: Strecker AL, Olden JD
Despite long-standing interest of terrestrial ecologists, freshwater ecosystems are a fertile, yet unappreciated, testing ground for applying community phylogenetics to uncover mechanisms of species assembly. We quantify phylogenetic clustering and overdispersion of native and non-native fishes of a large river basin in the American Southwest to test for the mechanisms (environmental filtering versus competitive exclusion) and spatial scales influencing community structure.
Gyrodactylid Ectoparasites in a Population of Rainbow Trout (Oncorhynchus mykiss).
J Am Assoc Lab Anim Sci. 2014;53(1):92-7
Authors: Garcia RL, Hansen AG, Chan MM, Sanders GE
A colony of rainbow trout (Oncorhynchus mykiss) in a decentralized aquatic animal facility was noted to have an increase in morbidity and mortality (from 4 or 5 fish each month to 3 or 4 fish daily) approximately 2 wk after experimental procedures began.