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fisheries

This tag is associated with 31 posts
Atlantic cod (Gadus morhua) [Wikimedia]

Now we got bad blood: Oxygen binding is not affected by haemoglobin subtype in Atlantic cod

Why do northern and southern populations of Atlantic cod have different haemoglobin subtypes? A recent study upsets over 50 years of theory.

Sharks, tuna and barracuda at a fish market in Oman (Image credit: piknik via flickr, CC BY-NC-ND).

Should all shark fishing be banned?

It might seem like a no-brainer to ban shark fishing as well as the sale and trade of shark products. But scientists wonder: is there a more effective management strategy? Read more to find out!

Figure 1: A school of Atlantic Bluefin Tuna (Source: http://www.photolib.noaa.gov/htmls/fish2001.htm)

What can tuna tell us about mercury emissions?

North America’s mercury emissions have declined over the last two decades. Researchers have found a connection between the declining emissions and the mercury level in tuna. Read more to find out how they made this link and what it could mean for the future.

Fig. 3. Entangled Sea Turtle. Source: NOAA.

Let’s Ghost Fishing for Halloween!

Ghost fishing is ghastly because it creates underwater graveyards for wildlife. The authors covered here wrote a new review of gear entanglement among mammals, reptiles, and sharks. Find out what they discovered by reading today’s post!

Fish Market (Credit: Jim, Flickr, CC-BY-SA)

Why do restaurants join sustainable seafood labelling programs?

Why do some restaurants join sustainable seafood eco-labeling programs? A new study identifies some motivating factors that can help the continued expansion of these programs to enhance their ability to harness consumer demand and encourage positive change in seafood production.

First-generation hatchery-reared fish have been released since 1992 to boost the threatened Hood River, OR steelhead population. Photo modified from Oregon State University @ Flickr.

Pet trout: domestication rapidly alters gene expression

The impact of domestication can be detected within one generation in steelhead trout, and may involve adaptation to highly crowded conditions.

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Ancient swimmers: Greenland sharks live for centuries

Using radiocarbon dating, scientists have discovered that the Greenland shark can live longer than any other known vertebrate. How long have some of these individuals been alive?

Young alevin of a Pacific species, the chum salmon.

You look like your mom: parental effects in Atlantic salmon

In honour of our Mother’s Day theme week, we’ll look at how the environment experienced by parents during reproduction and their early life history influences their offspring.

Pretty, isn't it? "The Blue Marble" photograph of Earth, taken when the Apollo 17 mission travelled to the moon in 1972. This picture is featured on the official Earth Day Flag. [Wikimedia]

Go Green for Earth Day!

Do Mother Nature a solid with these helpful tips & tricks to go green today!

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Trawling selects for faster fish

A new study suggests that differences in exercise performance make some individuals more vulnerable to capture by trawling than others, and that this may drive the evolution of commercially-important fishes (Photo: Wikimedia).

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How to Stop Dragging Our Assets: The World’s First Fishery Habitat Quota

Setting limits on fish catch is standard practice in fisheries management. For the first time in history, limits on habitat damage was introduced in 2012 for the groundfish bottom trawl fishery in British Columbia. Was it successful? Read to find out!

gangster cod

Northern Atlantic cod make an epic comeback

The collapse of Northern Atlantic cod was the textbook example of how overfishing can lead to a population crash. Decades after a moratorium was established, the cod are finally making a recovery. Find out why!

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Tampering with the food web: what do changes in jellyfish and menhaden populations mean for the ecosystem?

Article: Robinson, K.L., J.J. Ruzicka, F. J., Hernandez, W.M. Graham, M.B. Decker, R.D. Brodeur, and M. Sutor. 2015. Evaluating energy flows through jellyfish and gulf menhaden (Brevoortia patronus) and the effects of fishing on the northern Gulf of Mexico ecosystem. – ICES Journal of Marine Science, doi: 10.1093/icesjms/fsv088 Background We’ve all grown up learning “who […]

Early stage lobster. Photo credit: Macroscopic

Tiny lobsters, big problems.

Larval lobsters face potentially dangerous situations, find out how they fare against a couple important environmental stressors (salinity and pH changes).

Turtle Hook

Untangling the issues with longline fishing

Longline fishing has been used for decades as a way to catch large amounts of commercial fish. Though effective in capturing target fish, longlines unintentionally snag and kill millions of other marine species. Aside from being caught themselves, marine mammals (i.e. dolphins and killer whales) may eat target fish off the hooks and destroy fishing equipment. Are there ways to reduce incidental bycatch and make longline fishing more sustainable?

North Sea fish stick to warming shallows rather than cooling off at depth

Models based on historical survey data indicate that with long term warming trends, fish distributions in the North Sea will remain at nearly the same depths while abundances across species may change considerably.

Figure 1. Loggerhead sea turtle. Photo Source: http://www.animalspot.net/loggerhead-sea-turtle.html

Technology for Turtles: TurtleWatch Program to Protect Sea Turtles and Assist Fishermen

A technology that both benefits fishermen and helps prevent sea turtle bycatch? Yes, please! The great news is that it exists! And now, it has been updated to include leatherbacks. Read on to learn more about TurtleWatch.

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What would coral reefs be like without human impact?

One would think that an isolated reef ecosystem shielded from the influence of people would provide an ideal benchmark against which other coral reefs can be compared. But in a recent study, researchers found it isn’t that simple.

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Are bigger moms better moms?

We know that larger female fish produce more eggs, but does this really mean they produce more young that grow into the next generation?

Photo by John Øystein Berg in Snillfjord, Middle Norway, shows wounds due to sea lice parasitism.  www.atlanticsalmontrust.org

Sunday brunch: Lox with… lice?

Lox and lice. Not a combination of critters you envision when planning your Sunday brunch. Unfortunately, an increase in drug resistant sea lice is threatening both wild and farmed salmonid populations.

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