Homing and Straying in Chinook Salmon (<i>Oncorhynchus tshawytscha</i>) from Cowlitz River Hatchery, Washington

Quinn, Thomas P.; Fresh, Kurt L.

doi:10.1139/f84-126

Cited by 125 publications

(79 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Thus, the collective dynamics create a group-level responsiveness to the environment that is absent at the individual level (19). The resulting increase in gradient-tracking ability for larger groups agrees with previous hypotheses (20,21) and could explain empirical studies showing that grouping facilitates the detection of chemical cues (22)(23)(24) and improves the accuracy of migrations that rely on such cues (25,26).…”

supporting

confidence: 84%

Emergent Sensing of Complex Environments by Mobile Animal Groups

Berdahl

Torney

Ioannou

et al. 2013

Science

460

485

View full text Add to dashboard Cite

The capacity for groups to exhibit collective intelligence is an often-cited advantage of group living. Previous studies have shown that social organisms frequently benefit from pooling imperfect individual estimates. However, in principle, collective intelligence may also emerge from interactions between individuals, rather than from the enhancement of personal estimates. Here, we reveal that this emergent problem solving is the predominant mechanism by which a mobile animal group responds to complex environmental gradients. Robust collective sensing arises at the group level from individuals modulating their speed in response to local, scalar, measurements of light and through social interaction with others. This distributed sensing requires only rudimentary cognition and thus could be widespread across biological taxa, in addition to being appropriate and cost-effective for robotic agents.

show abstract

supporting

confidence: 84%

Emergent Sensing of Complex Environments by Mobile Animal Groups

Berdahl

Torney

Ioannou

et al. 2013

Science

460

485

View full text Add to dashboard Cite

show abstract

“…Furthermore, salmon may benefit from col lective navigation on their homeward journey, i.e. individuals in larger groups can better sense and respond to environmental cues and thereby increase their ability to navigate (Quinn & Fresh 1984, Jonsson & Jonsson 2011, Berdahl et al 2016. Bond et al (2017) compiled data from multiple studies of Chinook salmon Oncorhynchus tshawytscha, and for this species they found strong evidence that rates of successful homing increase with population abundance, consistent with the collective navigation hypothesis.…”

Section: Discussionmentioning

confidence: 99%

Maternal inheritance influences homing and growth of hybrid offspring between wild and farmed Atlantic salmon

Jönsson¹,

Jönsson²

2017

Aquacult. Environ. Interact.

View full text Add to dashboard Cite

The occurrence of domesticated organisms in nature is a major biological issue. Many can survive and reproduce with wild conspecifics, but little is known about the ecology of the hybrid offspring. Here, we investigated recapture, homing and growth of the released offspring of farmed (domesticated) and wild Atlantic salmon Salmo salar as well as their crosses. The fish were hatchery-reared for 1 yr and released as smolts in the River Imsa, Norway, the home river of the wild fish. The released fish migrated to the ocean. Many disappeared, but between 0.6 and 2% were sampled on their return as adults 1 or 2 yr later. Homing to the river of release was low for farmed salmon (88% strays). Among hybrids, having a wild mother provided increased homing accuracy (36% strays) relative to having a wild father (64% strays). Offspring of the local River Imsa salmon exhibited the best homing (28% strays). The growth capacity of the farmed salmon appeared to be not fully utilized in nature, as there was little difference in maximum size between wild and farmed salmon. However, minimum size at maturity was larger for farmed than wild conspecifics. Inheritance from a farmed mother increased minimum size of the hybrids versus that of the pure farmed salmon. Thus, maternal inheritance from domesticated, farmed salmon decreased homing and increased minimum size at adulthood of the offspring, making domesticated salmon a risk for locally adapted salmon in nature.

show abstract

“…In salmon, some studies suggested that younger fish were less prone to stray than older fish (Quinn et al, 1991;Labelle, 1992), and one study indicated a male sex bias in strays (Hard and Heard, 1999). Both natal and recipient habitat quality may affect straying rate (Quinn and Fresh, 1984;Quinn et al, 1991), but there is no evidence thus far that habitat quality could pre-select fish for straying. The decision whether to stray or to home can be seen as a reflection of the balance of interacting benefits and costs , and the close proximity of creeks and beaches in Little Togiak Lake may allow fish to better assess that balance.…”

Section: Discussionmentioning

confidence: 99%

Fine-scale differentiation between sockeye salmon ecotypes and the effect of phenotype on straying

et al. 2008

View full text Add to dashboard Cite

A long-standing goal of evolutionary biology is to understand the factors that drive population divergence, local adaptation and speciation. In particular, the effect of selection against dispersers on gene flow and local adaptation has attracted interest, although empirical data on phenotypic characters of dispersers are scarce. Here, we used genetic and phenotypic data from beach and creek ecotypes of sockeye salmon (Oncorhynchus nerka) in Little Togiak Lake, Alaska, to examine the relationship between gene flow and phenotypic and genetic differentiation. Despite close geographic proximity, both genetic and phenotypic differentiation between beach and creek fish was high and significant in all sampling years, with beach males having deeper bodies than creek males. Strays, or fish that did not return to their natal sites to spawn as determined by genetic assignment, tended to morphologically resemble the fish in the population that they joined. Male strays from beaches to creeks were shallower bodied than other beach fish, and male strays from creeks to beaches were deeper bodied than other creek males. Our results indicated that selection against strays may be moderated by the strays' phenotypic similarity to individuals in the recipient populations, but comparison of assignment results with long-term estimates of gene flow from F ST still suggested that strays had low reproductive success.

show abstract

Homing and Straying in Chinook Salmon (Oncorhynchus tshawytscha) from Cowlitz River Hatchery, Washington

Cited by 125 publications

References 8 publications

Emergent Sensing of Complex Environments by Mobile Animal Groups

Emergent Sensing of Complex Environments by Mobile Animal Groups

Maternal inheritance influences homing and growth of hybrid offspring between wild and farmed Atlantic salmon

Fine-scale differentiation between sockeye salmon ecotypes and the effect of phenotype on straying

Contact Info

Product

Resources

About