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New Models Help Predict Early Spawning of Fish Caused by Climate Change

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Credits: Peter Prokosch, GRIDA, https: //www.grida.no/resources/3510

Fisheries managers and researchers can now predict how early fish will spawn in response to rising water temperatures due to climate change, both in the ocean and in freshwater.

A new simple model developed by researchers at the University of British Columbia and the Chinese Academy of Sciences and applied to temperate spring spawning fish, with a very precise shift in maturity and spawning timing, taking into account changes in mean. Can be predicted. Annual temperature..

Built based on seasonal description temperature The change represented by two sine curves. This model is based on the concept of triggering a hormonal cascade that “tell” when a fish breeds when a certain temperature threshold is reached.

However, as the water temperature rises, the process becomes unbalanced as the fish need more oxygen to survive. The problem is that the gills on the 2D surface cannot keep up with the oxygen demand of the 3D growth and the oxygen demand of the new temperature. Therefore, this imbalance stresses the fish, causing it to mature and spawn faster.

“When the average annual temperature rises in a particular region and period, spring temperatures” arrive “earlier. The new model, which assumes seasonal temperature fluctuations observed in nature, requires only the difference in average temperature as input. It between two periods, and between summer and winter temperatures. Using only these two numbers, the model predicts by the number of days of spawning. fish Dr. Daniel Pauly, Principal Researcher and Lead Author of the Sea Around Us Initiative at the UBC Institute for the Oceans and Fisheries, said: Environmental biology of fish..

“This simple model Hopefully, it will replace the complex hypothesis often presented to explain temporal changes in spawning in terms of adaptation to similar changes in the emergence of prey species. Cui Liang, co-author of this study and researcher at the Oceanography Institute of CAS.

Data confirm the link between respiratory stress and fish breeding

For more information:
Pauly D Other Fish Temperature and Maturity: A simple sinusoidal model for predicting accelerated spring spawning. Environ Biol Fish (2022). doi.org/10.1007/s10641-022-01212-0

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Quote: The new model is the early spawning of fish due to climate change acquired from https://phys.org/news/2022-02-climate-change-duced-early-spawning-fish on February 14, 2022 (2022). February 14th) is useful for forecasting. html

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New models help predict early spawning of fish caused by climate change

Source link New models help predict early spawning of fish caused by climate change

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Fire Under Control Near Fountain Creek Park

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Update 11:12 a.m.

Firefighters put out a wildland fire early Thursday in the Fountain area, officials said.

The blaze was reported about 3:45 a.m. on the east side of Fountain Creek and south of Duckwood Park, Fountain police said in news release. Crews from fire departments in Security, Stratmoor Hills, Fort Carson and Hanover responded to heavy smoke and flames.

The fire was about a mile west of Colorado 85.

“The mild weather conditions this morning made it easier for fire crews to get this fire under control quickly,” police said.

The fire burned less than an acre before it was fully contained, officials said. As of Thursday morning, officials said the area is being monitored and might take several hours before the scene is cleared.

The cause of the fire is under investigation but officials said a lightning strike Wednesday afternoon might have ignited it.

Update 11 a.m.: The fire is 100% contained and burned less than one acre. No structures were threatened and no reported injuries.

The cause of the fire is still under investigation, however, officials think it possibly started from a lightning strike due to later afternoon storms on Wednesday.

Fountain fire department battled a wildland fire near Fountain Creek Regional Park Thursday morning, Fountain police said.

The fire ignited around 3:30 a.m. between Hwy 85 and Comanche Village Drive and crews managed to get the fire under control, police said.

Containment was 50% as of 7 a.m. but police did not give any estimates of the fire’s size.

The cause of the fire is under investigation, police said.


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Original Post: gazette.com

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911 Lines Down in Fremont and Custer Counties, Officials Say

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Fremont and Custer counties have been without 911 services since Wednesday afternoon, officials said.

According to the Fremont County Emergency Management, the lines have been down since 5:15 p.m. Wednesday. The public is asked to not call 911 “to test or check your phone.”

Calls will be be routed to the Pueblo County Sheriff’s Office, officials said. From there, they will be transferred back to Fremont County dispatchers.

This is a developing story. Check with gazette.com for updates.


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Original Source: gazette.com

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Alaska Rep. Don Young to Lie in State at US Capitol

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Rep. Don Young, the longest-serving Republican in U.S. House history, will lie in state in the U.S. Capitol on March 29.Read More

Original Article: seattletimes.com

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