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8 de mar. de 2018 · For example, a fish within a current needs to actively swim against the oncoming water flow in order to avoid potentially dangerous areas downstream. This behavior, known as rheotaxis , has been largely described as a response of the fish to the visual perception of its own drift.
- Pablo Oteiza
- Waves, Coastlines and Coral Reefs
- Climate Change
- What Can Fish do?
- What Can We do?
On the Australian coastline, waves created by winds are a major physical force that fish have to contend with. Some fish species are “rovers” without a fixed home range, and constantly swim over large areas in search of food or mates. Examples include species of surgeonfish and parrotfish. Since they do not need to defend a territory, these fish ca...
Researchers are increasingly concerned that accelerating changes in weather patterns are affecting fish and other aquatic organisms. Rivers, lakes and coastal habitats are ecologically, socially and economically important places, so it’s worth investing the time to research the impacts of climate change on these areas. In addition to warming temper...
If waves are costly for some fish, then why don’t they move to calmer locations? Fish can swim, after all. And some won’t even have to swim very far to reach calmer waters. Water velocity can vary across very small scales on coral reefs. A new underwater instrument was developed at James Cook University to measure wave forces on the sea floor. A st...
Our understanding of how fish deal with waves, let alone adapt to changes in their flow environment, is very limited. Answers to many important questions remain elusive – what aspects of their shape, physiology and behaviour allow certain species to thrive in their current habitats? How do waves affect important phenomena like the outcome of predat...
- Dominique Roche
30 de out. de 1997 · Nature - Fish always orientate their bodies upstream, a behavioural response called rheotaxis. But just how they know which way the current is flowing has been a matter of some debate. New...
- R. Glenn Northcutt
- 1997
15 de mai. de 2014 · If this pattern is broken up by fish changing to stand on the current, the group structure is probable to collapse and move towards a new stable structure with all fish to hold a constant position against the current. The On Current structure was observed at water current velocities of approximately 47 cm s −1 .
6 de jan. de 2021 · Salmon are one of the most well-known examples of anadromous fish — that is, fish that migrate from the sea to rivers in order to spawn. Every year, both bears and fisherman alike head out to...
11 de jul. de 2019 · Most fish don’t want to swim against the current all day. In fact, the only fish I can think of that actively resists current on purpose are salmon and steelhead swimming upstream to spawn. Most resident fish do their best to conserve as much energy as possible while simultaneously positioning themselves in locations where the ...
12 de jul. de 2023 · Fish swimming against the current is a fascinating behavior that happens for various purposes, such as foraging, maintaining position, and reproductive migration. While instinctual behaviors and environmental factors play a significant role in this behavior, the specifics can vary among species.
