IN BRIEF - Fighting and mating success in giant Australian cuttlefish is influenced by behavioural lateralization
Thursday, March 14, 2019
Behavioural lateralization is widespread. Yet, a fundamental question remains, how can lateralization be evolutionary stable when individuals lateralized in one direction often significantly outnumber individuals lateralized in the opposite direction? A recently developed game theory model predicts that fitness consequences which occur during intraspecific interactions may be driving population-level lateralization as an evolutionary stable strategy.
This model predicts that: (i) minority-type individuals exist because they are more likely to adopt unpredictable fighting behaviours during competitive interactions (e.g. fighting); and (ii) majority-type individuals exist because there is a fitness advantage in having their biases synchronized with other conspecifics during interactions that require coordination (e.g. mating).
We tested these predictions by investigating biases in giant Australian cuttlefish during fighting and mating interactions. During fighting, most male cuttlefish favoured the left eye and these males showed higher contest escalation; but minority-type individuals with a right-eye bias achieved higher fighting success.
Seventeen years ago, leaders of the shrimp industry from across the country’s southern coastline came together in response to what they saw as an immediate threat to the continued existence of the commercial fishery. Volunteering their time, their money, and their reputations, these industry veterans built a national response to the challenges facing shrimpers throughout the South Atlantic and the Gulf of Mexico.
Miss Elaine was a founding Director of the Southern Shrimp Alliance and served two terms as the President of this organization. She was also a founding Director and the first President of Wild American Shrimp, Inc., the shrimp industry’s first national marketing initiative. Miss Elaine served the industry in a broad range of capacities, spending several terms as the Vice-President and Secretary of the Georgia Shrimp Association, acting as part of the National Sea Grant Review Board for two terms while also participating for many years on the National Sea Grant Assessment Team, and serving as a member of the South Atlantic Fisheries Management Council for three consecutive terms, two of them as Council Chair.
BELMOPAN – Eighteen border control officers from seven member States of the Caribbean Regional Fisheries Mechanism (CRFM) are undergoing a four-week training course in Fisheries Prosecution and Interdiction, organized by the Barbados-based Regional Security System (RSS) in collaboration with the CRFM Secretariat, the government of Barbados, and the British Royal Navy’s Fisheries Protection Squadron.
The training, being held at the Paragon Base of the Barbados Defense Force, brings together officers of the Antigua and Barbuda Defense Force Coast Guard; Antigua and Barbuda Fisheries Division; Barbados Coast Guard; Royal Barbados Police Force Marine Unit; Barbados Fisheries Division; Commonwealth of Dominica Police Force; Royal Grenada Police Force Marine Unit; the St. Kitts-Nevis Defense Force Coast Guard; Royal Saint Lucia Police Force Marine Unit; and the Royal St Vincent and the Grenadines Police Force Coast Guard.
Last month, June 2019, the Indian government created its first ministry for fisheries. Although it clubs fishing together, rather oddly, with animal husbandry and dairy, the move fulfills a long-standing demand of the country’s fishing community and becomes the latest, and potentially the most important, of India’s slowly growing efforts to better regulate and manage its fisheries.
Fishing has transformed over the decades from a small-scale artisanal practice into an increasingly industrialised sector. The widespread adoption of mechanised boats helped hike India’s fish catch from an estimated 0.53 million metric tons in 1950 to 3.83 million metric tons in 2017.
Until recently, this growth was largely unregulated, leading to over-capacity of fishing boats, inter-state conflict and overfishing of some species. But as yields have slowed in the past decade, including an unexpected crash in the sardine catch, India’s coastal states have begun to take measures to make fishing more sustainable. Some are also pressing for better national regulation.
Jakarta - The Indonesian Maritime Affairs and and Fisheries Ministry (KKP) is committed to reducing marine plastic debris by limiting singe-use plastics in fishing ports.
"The regulation has been made. We have selected plastics in fishing ports managed by the KKP, and we have put them into trash bins and plastic waste treatment devices," Bramantya Satya Murti, director general for maritime spatial management of the ministry, said on the sidelines of the Plastic Waste Parade event held here on Sunday.
To reduce plastic use, the ministry has set up plants to produce flake ice that could be put into cool boxes for fishermen.
The Quota Management System has short-changed fish, mana whenua and the public since it was established in 1986.
The system was set up with the quota owners having to pay resource rentals. This only lasted a few years. For the past 30 years the commercial fishing industry has not paid for the use of these publicly-owned resources.
"Incredibly, we gave away most of our fisheries at no charge," said LegaSea spokesman Scott Macindoe.
ELIOT, Maine - After dropping its bid for an aquaculture expansion on the Kittery side of Spinney Creek, Spinney Creek Shellfish has filed a new application for the Eliot side, now seeking a smaller, standard lease of 2.75 acres.
The oyster company has submitted a draft application to the state Department of Marine Resources (DMR), stating it would relinquish its 12 existing limited purpose aquaculture licenses if its new request is granted. Per the application, the lease would allow for a maximum of 600 suspended cages to grow oysters and quahogs in a subtidal zone of Spinney Creek.
A scoping session was held Wednesday in Eliot, where members of the public could comment before Spinney Creek Shellfish officially submits its application, for which a hearing will likely be scheduled for late fall or winter.
The We'koqma'q First Nation in Cape Breton is partnering with fish farming giant Cooke Aquaculture to help with the sales and marketing of the reserve's Bras d'Or Lakes steelhead trout.
Since 2011, a trout farm has been in operation at the reserve. Chief Rod Googoo said it has grown to have more than 50 people work at the fish farm, hatchery and processing plant. The operation has about 60 cages in the Bras d'Or Lakes.
"We started off small and we gradually built up steam and we got bigger and we got better at what we do, and we did it over a short period of time," said Googoo, who estimates they will harvest between CAD 10-12 million of fish in 2019.
SRINAGAR - Advisor to Governor, K Skandan, today said that a massive fisheries and aquaculture programme has been undertaken by the Government to boost the fishing industry in the State.
The Advisor stated this while speaking at a two-day National Conference on Fisheries and Climate Change at Sher-e-Kashmir University of Agricultural Sciences and Technology Kashmir (SKUAST-K) here.
Advisor Skandan delved into detail as to how climate change has affected food systems. He said that the fisheries and aquaculture sector is a crucial resource in terms of ensuring food and nutrition security. He called for collective efforts to create a balance between developmental needs and environmental sustainability. He said universities, scientists and people together can make strategies to tackle the important issue of climate change which is affecting ecosystem, adding if things go unchecked oceans will also undergo multiple woes.
Canada has the longest coastline in the world, yet it has long been a lax outlier in fisheries management. But with an overhaul of the federal Fisheries Act now complete, the sense among advocates and fisheries experts is that the tide is about to turn.
The passage of Bill C-68 on June 21 means that for the first time since the Fisheries Act was enacted in 1868, Fisheries and Oceans Canada is required to manage fish stocks sustainably and put rebuilding plans in place for those that are depleted.
Josh Laughren, executive director of the non-profit advocacy organization Oceana Canada, says that in 20 years we may look back and see the new criteria around sustainable management and rebuilding stocks as a transformational change.
Namibians sue Icelanders over USD 29m trawler Namibia
Two Namibian fishing companies are asking the High Court to block their Iceland business partners from selling a fishing vessel worth NAD 400 million (USD 28.6 million) they jointly own.
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