What really makes fish become sexually active

What really makes fish become sexually active

What really makes fish become sexually active

Mandarin fish mating. Image by Klaus Stiefel, Flickr.

Discounting anthropogenic-induced changes, the seasonally oscillating environments where long-lived fish hatch and grow remain more or less the same throughout the course of their lives. This means that the common explanation that states that fish become sexually active – or spawn for the first time – after experiencing certain environmental stimuli does not properly explain this phenomenon.

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Understanding why fish grow the way they do and getting serious about it

Understanding why fish grow the way they do and getting serious about it

Understanding why fish grow the way they do and getting serious about it

Fish gills. Image by 2427999, Pixabay.

The distribution and concentration of dissolved oxygen and water temperature in the oceans and freshwaters are usually far more influential in shaping the growth and reproduction of fish than the distribution of their prey.

In a new paper in Science Advances, Daniel Pauly, principal investigator of the Sea Around Us initiative at UBC’s Institute for the Oceans and Fisheries, argues that scientists need to avoid attaching human attributes to fish and start looking at their unique biology and constraints through a different lens.

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