Posts Tagged mexico

Jun 23 2016

US and Mexico to define criteria for catching sardines

Monterrey sardine, Sardinops sagax. (Photo: NOAA)

A study on populations of sardines (Sardinops sagax) that inhabit the waters of Baja California could be crucial to define the guidelines for capture, care and sustainability of the species to be agreed by the governments of Mexico and the United States.

Interviewed by the News Agency Conacyt, study author Norma Laura Lucio Martinez, a researcher at the Coastal Research and Development Centre (CIDECO), said that for the evaluation samples were taken during 2012, 2013 and 2014, to carry out comparisons.

The researcher explained that there is concern by the US government to establish fishing quotas for catching sardines. This is because in Mexico it is performed under the size criteria, and the study shows the sector that Baja California takes advantage of a shared reserve that makes it impossible to set quotas.

To determine that the sardine populations living in Baja California are mixed with various groups that migrate along the California current, an otolith analysis was performed.

The otoliths are bones found in the front part of the sardine, which makes it possible to see what part of the California current the sardine comes from through rings that get marked similarly to those on the trunks of the trees.

The researcher explained that the distribution of the Monterrey sardine ranges from Canada to Baja California Sur, and there are three main populations that migrate for food, except for the southern one.

“With these three populations that are identified, rings are being deposited and finally if they are caught off Ensenada and the otoliths are identified by microscope, by measuring the proportions it is possible to know their age and where this species was born. This is how the study was conducted, by measuring the otoliths, sizes and also by making comparisons with weight and size,” she explained.

With regard to capture policies, Lucio Martinez said that through the Tri-National Sardine Forum, researchers, producers and government officials discuss capture guidelines as well as those for the care and sustainability of the species.

“In the United States it has been said that quotas must be established, which is how they perform their capture; in Mexico it is not managed through catch volumes but by size, being the minimum catch size 15 centimetres because it is said to be the size in which at least the specimen has already spawned once,” she explained.

Through the same forum, the results of the research have been provided. They state the sardine population is migrating along the entire California Current, which confers the study a direct link with the productive sector.

“As the population can not be controlled so that it does not move, the population belongs to both countries, then it is a shared resource, we identify that it could have been in any of the two countries where the species was born,” concluded the researcher.

Read the original post:

Jan 4 2012

Anglers Getting Hit with Fishing Closures and Higher Fees

Written by Ed Zieralski | Outdoors Reporter

Ocean fishermen who fish waters off Southern California and Mexico are about to be hit with a double whammy, the likes of which no one has ever seen.

In the U.S., a network of fishing closures in the South Coast Region from Point Conception in Santa Barbara to the U.S.-Mexico border in San Diego take effect Jan. 1. But even before that, anglers who fish in Mexican waters are likely to see increased fees for a required visa to fish in Mexico. The visa will be required in addition to a Mexican fishing license or permit.

Mexico City officials are expected to announce soon some sweeping new regulations regarding visas for foreign fishermen who visit Mexican waters.

American officials and representatives have been working the past two months to clarify what additional fees fishermen will need to pay to keep fishing in Mexico, and word Thursday was that an announcement is imminent. The information is expected to spell out the fees and documents necessary to fish in Mexican waters. An official with the Sportfishing Association of California, which represents passenger sport boats in Southern California, confirmed that news is expected very soon.

In addition to those extra costs to fish Mexico, ocean anglers also are facing the start of the Marine Life Protection Act’s South Coast fishing closures, set to take effect Jan. 1. Combine those new marine reserves that prohibit fishing with the regularly-scheduled, two-month closure for rockfish, also on Jan. 1, and that’s going to reduce further the fishing grounds. The rockfish closure makes it a triple whammy.

Read the rest of the story on the San Diego Union-Tribune.



Jun 22 2011

Squid Studies: Scientists Seeking and Savoring Squid

William Gilly, a professor of biology at Stanford University’s Hopkins Marine Station, embarked on new expedition this month to study jumbo squid in the Gulf of California on the National Science Foundation–funded research vessel New Horizon. This is his second blog post about the trip.

By William Gilly

SEA OF CORTEZ— As we moved up the Gulf towards Guaymas, we continued to prepare our equipment. Actually, this will be a never-ending focus for the next two weeks. A research cruise in most cases is a creation in progress, and ‘equipment’ in our case ranges from Brad Seibel’s industrial-scale plumbing system for keeping big squid alive during experiments to our collection of fishing gear to catch squid. Everything will need constant, meticulous attention.

We arrived in Guaymas mid-afternoon and collected the rest of our party by 7 pm and immediately headed out to deep water about 10 miles offshore for our first exploratory squid jigging session. We arrived around 10:00 pm at the chosen site where a finger-like canyon poked back toward Guaymas. We immediately began to catch squid, and this had a predictable effect. We believe that catching a squid automatically triggers joyful exuberance. We have seen this phenomenon hundreds of times over the last decade. If there is photo of someone frowning while holding up a squid for the camera, we would like to see it. We doubt such an image exits.

Within an hour or so we collected our target sample of 20 to 30 squid. They were lined up sequentially on deck, measured, weighed, sexed and assessed for stage of maturity. This is information is simple but vital for two main reasons.

First, it is necessary to confirm the size of animals being sampled by the scientific sonar system on board that is being used by the Oregon State group. Acoustic data collected shows the depth where the squid and their prey are, and it can also be used to calculate numbers of squid or biomass – but only if you know how large the squid are that are being sampled acoustically. This is standard fare for acoustic assessment of fin-fish fisheries around the world, but use of such methods with squid is much less widespread. Kelly Benoit-Bird’s team from Oregon State is doing pioneering work in this area, and her insights and creativity were recognized with a MacArthur award in 2010.

Read the rest at Scientific American.