Knowledge

We open a window to knowledge.

Through articles, videos and other content related to knowledge and know-how, as well as experiences and research, we put at your disposal the necessary information to evolve as Scientific Angler.
Issues such as marine ecosystems and the interrelationships with human activities, the biology of fish, cetaceans and seabirds, the procedures of location, observation, data collection and marking are, among others, aspects that we will develop in this section.

Your proposals will be welcome.

Happy New Year!

Scientificangler team wishes you fantastic 2022.

Merry Christmas!

Scientificangler team wishes you a Merry Xmas!

Scientificangler kids:

An opportunity for our little ones to get to know our sea.

Download Inscription sheet Kids Torredembarra 2021

CAMPUS starts!

Agreement APERS/GTR/Scientific Angler

For this current year of 2021, we will have marking activities and scientific projects nationwide:

Confirmation of the activity calendar as soon as possible.

Second evolutionary forecast Bermeo 2019

Evolution of the forecast but already adjusted to the two pending stages:

The forecasts of the activity zones are freely accessible to registered users in our activity zones tab.

New evolutionary forecasting model. September 2019

Following our collaboration with the national capture, tagging and release events, and in line with the Bermeo World Capital Tuna Tagging Challenge this weekend, we have activated a new evolutionary forecasting model so that participants may have more data to choose their area of activity:

The forecasts of the activity zones are freely accessible to registered users in our activity zones tab.

SUZUKI's 8th “CLEAN-UP THE WORLD CAMPAIGN”

As the “ULTIMATE OUTBOARD MOTOR” brand, Suzuki understands the importance of a clean and healthy marine environment. We began our “Clean-Up the World Campaign” in 2010 and this campaign is now part of the Japanese Ministry of the Environment’s “Plastic Smart Campaign”.

For more information please visit:

http://plastics-smart.env.go.jp/en/

Download Suzuki Family 149, Spring 2019

For A Plastic Free Sea...

The sector's commitment to the environment is increasingly tangible.

Anisakis I, life and misadventures of a marine parasite, from planettuna of the IEO

AMA or Breathless 2

Let's relax ourselves this Friday end with another video that leaves us breathless, in this case Julie Gautier, recordwoman of apnea in France in constant weight and one of the 10 best freedivers in open sea, wrapped in a no less spectacular melodic creation of Ezio Bosso and his Rain in your dark eyes. An ideal short to start this weekend. Enjoy!

Tuna tagging. Conventional Tags.

Given the general interest for the tagging, we will be exposing in this section the bases for a correct tagging, with excerpts from the ICCAT tagging manual (the International Commission for the Conservation of Atlantic Tunas).

Fig. 3.1.1.1. - Spaghetti tags with different types of dart.

Conventional tags

Conventional tagging is carried out by means of conventional tags also known as dart tags or spaghetti tags (Fig. 3.1.1.1.). These tags are simply designed, low cost and easy to insert into the fish. Conventional tags are typically used in large-scale tagging programs, which is the present case with ABFT tagging.

Indeed, the need to deploy a large number of conventional tags originates from the need to obtain a sufficient number of returned tags in order both to validate the current stock status definitions for ABFT populations in the Atlantic and the Mediterranean and to assess their mortality parameters (natural and fishing-related). The use of a large number of conventional tags is also justified by the current low rates of tag returns. Since the aim of this type of tagging is to mark thousands of tunas, it derives that two requirements must be met:

a) catching many individuals in a comparatively short time;

b) tagging them rapidly and effectively.

A most important issue related to tuna tagging is the fish survival rate after tagging operations. Hence catching, handling, marking and releasing procedures must be as fast as possible, in order to reduce stress, and cause the least possible detriment to fish health.

Tag size

Larger implanted tags are potentially more visible than smaller ones to fishermen and others who will be handling the fish, but the larger the tag the greater the disturbance to the fish. Hence, as a general rule, small fish are tagged with small tags and large fish with large ones.

Small tunas have been successfully tagged with dart tags 10 cm in length and 1.5 mm in diameter; larger tunas have been tagged with 12.5 cm x 2 mm dart tags.

And so far as regards conventional labels. In short, the hygiene conditions to apply and following, an advance of the implementation of labels and tagging procedure:

Insertion point of the anchor (i.e. spaghetti tag or dart of a pop-up tag) into the fish (illustration by S. Gelao; c: source from Kearney and Gillett, 1982)

Breathless

TGIF, as a Taiwanese colleague says affectionately, Thanks God Is Friday, :-), and to celebrate, a video that leaves you breathless ... and what impressive waters! ... Good weekend community.

An exciting tool for tracking and locating small pelagics ...

Soon on your screens ...

Yes, you have guessed right, it is the sonar carried by a pleasure boat that complies with everything necessary that we need; compact, since it is directional and 160KHz so that its installation fits on our ships and with what is also achieved a non matched discrimination of the fish "scattered", loose, and near the bottom.

We identified in the previous image, a clear school probably of sardine and anchovy (by echo and sonar settings) at about 35m along the starboard side and about 3 m from the surface, "cuddled" by several predators, plus the wake of our boat trying to walk the lures over the shoal without interfering with the same with the hull itself, propellers and aeration of the water ... if we were a purse seiner, someone would think that we are deploying the net.

In the next chapters we will see the adjustments that we see in the left column and the location that we see in the right column of the screen, as well as general details of what "duck" shows us, and you will see why they call it that way colloquially. Certainly a great tool (for me, unmatchable and essential) but not with many automatisms (only in the column of adjustments, we see 5 different gains) ... without a doubt, the sonar is as good as the sonarist who interprets and adjusts it.

Life cycle of bluefin tuna from planettuna of the IEO

Article Turkish Marine Research Foundation (TÜDAV) on bluefin tuna

Abstract: ATLANTIC BLUEFIN TUNA IN THE MEDITERRANEAN SEA: FISHERIES, FARMING, MANAGEMENT AND CONSERVATION

Authors: Karakulak, Firdes & yıldız, Taner. (2016).

Download

Put a little movement to life with GIPHY

via GIPHY

There is no life without Catch and Release

Matt Simons - Catch & Release (Deepend Remix) Lyric Video from John LaPrime on Vimeo.