fish population

Healthy fish ensures good fishery managemnet

harminka — Mon, 10 Aug 2009 02:08:02 -0500

Recreational anglers and commercial fishermen understand you need good fishery management to make sure there will be healthy populations of fish for generations to come. And making good management decisions rests in large part on understanding the mortality of fish species – how many fish die each year as a result of natural causes and recreational and commercial fishing.

Gulf Fisheries Threatened by Low Apalachicola River flow

harminka — Sat, 20 Jun 2009 01:12:30 -0500

Reductions in the flow of the Apalachicola River have far-reaching effects that could prove detrimental to grouper and other reef fish populations in the northeastern Gulf of Mexico, according to a new Florida State University study that may provide new ammunition for states engaged in a nearly two-decade water war.

What is captive breeding doing to fish populations?

harminka — Thu, 11 Dec 2008 13:53:56 -0600

Human impacts on the environment have reduced populations of wild species to dangerously low levels. Nowhere is this more apparent than in worldwide fisheries, where thanks to overfishing and habitat destruction, countless species and populations of fish are on the brink of disappearing forever.

Male fish deceive rivals about their top mate choice

harminka — Thu, 31 Jul 2008 13:37:01 -0500

When competitors are around, male Atlantic mollies try to hide their top mate choice, reveals a new study published online on July 31st in Current Biology, a Cell Press journal.

Clues to determine ages of fish and shellfish populations

harminka — Thu, 22 May 2008 08:05:47 -0500

Fishery biologist Sandy Sutherland looks through the lens of the microscope at tiny sections of fish earbones, known as otoliths, each showing annual bands of growth. She carefully counts the bands to determine the age of the fish, then moves on to the next sample.

Conservation of freshwater fish biodiversity

harminka — Wed, 26 Mar 2008 13:24:22 -0500

Humans have regularly been introducing exotic species into natural environments in order to provide for their nutritional necessities or meet less indispensable purposes such as horticulture, fishing or hunting. However, the particular environments are not always adapted for hosting new arrivals.

5th annual Keys bonefish population census results announced

harminka — Tue, 26 Feb 2008 12:08:02 -0600

Results are in from last year’s fifth annual Bonefish Population Census in the Florida Keys and the bonefish population has remained fairly steady from 2006, however, the number of volunteers participating in the annual event continues to grow.

Piddling fish face off threat of competition

harminka — Wed, 12 Dec 2007 10:54:15 -0600

Aggressive territorial male Mozambique tilapia fish (Oreochromis mossambicus) send chemical messages to rival males via their urine. They increase urination, have smellier urine and store more in their bladders than less aggressive males, according to research published in the open access journal BMC Biology.

Longest study finds reef fish need longer break

harminka — Thu, 12 Jul 2007 08:54:42 -0500

In the longest running study on how fish populations in coral reef systems recover from heavy exploitation, researchers from the Wildlife Conservation Society (WCS) and others have found that the fish can recover, but they need lots of time – decades in some cases. The study appears in a recent edition of the journal Ecological Applications.