Gulf coast jellyfish, turtles dying


This video from the USA says about itself:

BP Oil Spill Worsens With No Solution in Sight, 210,000 Gallons a Day Spew into Gulf of Mexico.

From Associated Press:

Dead jellyfish washing ashore along Miss. coast

By BRIAN SKOLOFF
ASSOCIATED PRESS WRITER

GULFPORT, Miss. — The head of the National Wildlife Federation says he has seen a huge number of dead jellyfish along the beach on an island at the southern end of the Mississippi.

Larry Schweiger says his team will go back out Monday to take tissue samples to see if the oil spill caused their deaths.

Schweiger says it’s not uncommon to see jellyfish floating dead during high winds, but the number of dead found so far is beyond normal.

At least 20 sea turtles have been found dead over the weekend along a 30-mile stretch of Mississippi beaches but wildlife officials can’t say with certainty the turtles died as a result of the oil spill. They won’t know more until necropsies are performed on Monday.

How You Can Help Wildlife Impacted by the Louisiana Oil Spill: here .

[US Republican Rush] Limbaugh says to leave oil slick alone: ‘it’s as natural as the ocean water is’: here.

Social Media and the Spill: here.

Freshwater jellyfish blooms cause sensation in some North American lakes: here.

Cuckoo-like African catfish discovery


This is a video of a young Bagrus meridionalis catfish in an aquarium.

From Practical Fishkeeping:

New cuckoo spawning catfish discovered

Synodontis catfish are not the only cuckoo spawners in the Rift Lakes, according to a study published in a recent issue of the journal Copeia.

American ichthyologists Jay Stauffer and William Loftus report for the first time brood parasitism (cuckoo spawning) carried out by the clariid catfish Bathyclarias nyasensis (known locally as Bombe) using the large bagrid catfish Bagrus meridionalis (known locally as Kampango) as the host.

The Kampango is a substrate-spawning catfish that practices biparental care. Female Kampango feed their young trophic (unfertilised) eggs while the male gathers macroinvertebrates from nearby sand habitats and carries them by mouth back to the young in the nest.

Consequently, the young Kampango gather around the vent of the female to feed when she is in the nest and around the gill openings of the male (where the macroinvertebrates are discharged) when he is in the nest.

The authors observed 14 Kampango nests while scuba diving in Lake Malawi and found four of these broods to be composed entirely, or almost entirely of young Bombe. The young Bombe fed exactly like young Kampango, gathering around the vent of the female when she was in the nest, and around the gill openings of the male when he was in the nest.

The prevalence of the parasitised broods led the authors to hypothesise that the Bombe most likely laid their eggs over spawning Kampango, and that the Bombe young hatch first and devour the Kampango eggs and larvae, leaving only the Bombe to be raised by the Kampango. This scenario is identical to well-known case of brood parasitism carried out by Synodontis multipunctatus on cichlid hosts in Lake Tanganyika.

For more information, see the paper: Stauffer, JR Jr and WF Loftus (2010) Brood parasitism of a bagrid catfish (Bagrus meridionalis) by a clariid catfish (Bathyclarias nyasensis) in Lake Malawi. Copeia 2010, pp. 71–74.

Systematic revision of the formerly monotypic genus Tanganikallabes (Siluriformes: Clariidae): here.

African freshwater species threatened – livelihoods at stake: here.

Fisherman poses with ferocious 5ft long goliath tigerfish caught during an expedition up the River Congo in Africa: here.

Pareiorhina hyptiorhachis, a new catfish species from Rio Paraíba do Sul basin, southeastern Brazil (Siluriformes, Loricariidae): here.

Cetti’s warbler increase in Dutch nature reserve


This video is abouit a Cetti’s warbler in Lac de Grand-Lieu in France.

From Staatsbosbeheer in the Netherlands:

03/05/2010

The rare Cetti’s warbler (Cettia cetti) is continuing its forward march into the Biesbosch nature reserve. In this Natura 2000 area and national park, this year almost 250 nesting territories have been found. In 2006, for the the first time after many years, a breeding couple had been observed. Before that, the Cetti’s warbler appeared only rarely. Only in 1978 about 25 breeding pairs were counted, but after the severe winter of 1978-1979 they were almost all gone.

The State Forest Service is pleased with the large presence of this little bird. They estimate that this year more than 60% of the national Cetti’s warbler population will nest in the Biesbosch. That shows the importance of this Natura 2000 area for the bird. Also for species such as bluethroat, marsh harrier and kingfisher, Biesbosch is an important area.

Last year, there were about 150 breeding Cetti’s warbler couples in the Biesbosch.

Cetti warbler sound: here.