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First documented tiger shark mating hub identified by UH researchers

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First documented tiger shark mating hub identified by UH researchers


OLOWALU (HawaiiNewsNow) – A team of shark researchers from the University of Hawaii at Manoa have solved a longstanding mystery.

Biologists from the the Hawaii Institute of Marine Biology Shark Lab have identified the first-ever documented tiger shark mating hub.

Six years of acoustic tracking data led the team to pinpoint the area at Olowalu, Maui, leading them to new discoveries about the nature and timing of tiger shark mating and its correlation to Maui’s whale calving season.

This new finding challenges the understanding of tiger sharks as purely solitary animals.

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“To our knowledge, no group mating site for tiger sharks has ever been identified. This paper adds an important piece to the puzzle of tiger shark reproduction,” said Carl Meyer, co-author of the study and principal investigator of the HIMB Shark Lab.

Researchers were able to show evidence that tiger sharks have a predictable seasonal gathering of mature males and females that coincides with humpback whale calving season in Hawaii.

Until this discovery, it was unclear how or if tiger sharks came together to reproduce or if mating was just a result of random encounters.

“Tiger sharks typically roam widely in what can seem like random patterns, so finding such a strong and consistent seasonal trend in their movements around Maui was unexpected,” said Paige Wernli, lead author of the study and a graduate student in the HIMB Shark Lab.

The years-long tracking data showed a predictable seasonal presence of both mature male and female tiger sharks at Olowalu, as well as physical evidence of mating activity.

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The apparent mating hub happens during the time of year when humpback whale mothers and newborn calves arrive in the area.

The Shark Lab team says the correlation could mean that the sharks are positioning themselves near foraging opportunities, like vulnerable calves or placental falls.

“Mating and foraging on humpback whales may not be mutually exclusive,” Wernli said. “And both could influence tiger shark movement patterns in Hawaii.”

The tiger shark gatherings they observed were not dense but rather diffuse, spanning several kilometers over multiple months.

“This study expands our knowledge of tiger shark mating and challenges our conventional understanding of the term ‘gathering,’” said Meyer. “Together, the results suggest that both reproduction and food availability play key roles in shaping tiger shark movements in Hawaii.”

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During the six-year study, the team was able to safely catch and implant transmitters in large sharks, then keep a vast network of underwater listening stations across the main Hawaiian Islands.

In the future, the Shark Lab team plans to use tags with cameras and other data collecting capabilities to document both their mating behaviors and shark-whale interactions.

This work was funded by the Hawaii Department of Land and Natural Resources and the Pacific Islands Ocean Observing System.



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Hawaii

Lawmakers explore controversial rule changes for primary elections

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Lawmakers explore controversial rule changes for primary elections


HONOLULU (HawaiiNewsNow) – A bill to eliminate party-based voting for primary elections in Hawaii is making headway at the State Legislature.

Senate Bill 2480, according to its webpage description, “allows voters in a primary or special primary election to vote for any candidate for any office without regard to the voter or candidate’s political party preference. Advances the top two candidates in a primary or special primary election, regardless of political party, to the general election.”

Measure supporter Marlene Thom said, “To me this expands voter choice and allows the general election candidates to reflect a broader support among the electorate, thereby making our elections more inclusive.”

During a hearing with the Senate Judiciary Committee on Friday, 41 people submitted testimony in support of the measure, while nine voiced opposition.

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“This is a simple, yet far-reaching bill that would improve voter choices,” another testifier in favor of the bill said. “Let’s make general elections great again.”

While bill backers say the rule change would expand voter choice, those against it say it would do the opposite.

“I love that this eliminates the partisan part of primaries, right? So if we could just eliminate the partisanship part, excellent, but that we’re not just doing that, right? That would be an oversimplification,” said Jackie Keefe in opposition to the proposal.

“And so if we really think of it on a larger scale, this is helping protect the status quo, right? Which is what the grassroots folks are always trying to push back against,” she added.

Another opponent, Austin Martin, said, “There is no stability in the law right now, and there is a lot of mistrust in our public institutions.”

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“Yanking the rug out from under people and changing the entire system in a way that, while it sounds nice on the surface, in fact, only benefits the establishment insiders, they’re setting Hawaii up for some very bad things to happen,” he added.

Lawmakers advanced the bill at Friday’s hearing,

The window is open for candidates to file for the primary election on Aug. 8.



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Lei legislation aims to bolster Hawaii flower farm industry | Honolulu Star-Advertiser

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Lei legislation aims to bolster Hawaii flower farm industry | Honolulu Star-Advertiser




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No. 3 Hawaii smashes No. 18 Stanford in 77 minutes | Honolulu Star-Advertiser

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No. 3 Hawaii smashes No. 18 Stanford in 77 minutes | Honolulu Star-Advertiser


No. 3 Hawaii needed 77 minutes to sweep No. 18 Stanford 25-16, 25-15, 25-17 today at Maples Pavilion in Stanford, Calif.

The Rainbow Warriors improved to 11-1 with an eighth straight win that was as impressive as any victory this season.

Junior setter Tread Rosenthal finished with 38 assists, three digs, two aces and two blocks. His assists total was 17 more than Stanford’s entire team had in kills.

Hawaii hit .515 for the match, led by 12 kills from Kainoa Wade and 11 by Adrien Roure. Wade hit .588 with two hitting errors and Roure’s hitting percentage was .667 with one error. Roure had three aces, including one on match point.

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Louis Sakanoko added nine kills and middles Justin Todd and Trevell Jordan each had four kills.

Only one non-defensive starter for UH hit less than .429.

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Luke McFall had six kills and Theo Snoey, who had 23 kills the last time the two teams played in Stanford’s four-set win in Hawaii last year, was held to five kills.

UH and Stanford will play again on Saturday at 4 p.m.




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