NOTICIAS DE MAMÍFEROS ACUÁTICOS

BUSCADOR DE NOTICIAS DE PERIÓDICOS DEL MUNDO SOBRE MAMÍFEROS ACUÁTICOS ""..
PON SIEMPRE LA PALABRA, BALLENA, DELFINES, ORCAS, ETC..PARA FILTRAR
eJ: "ULTIMAS NOTICIAS DE DELFINES 2009..." o "julio de 2009"

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Un cachalote muerto llega al Saler (28/agosto/09)
La retirada del ejemplar, que será troceado, se prolonga durante la noche para dejar la playa despejada. El cetáceo pesa 20 toneladas
ver la noticia completa y video...+
COPULA ENTRE BALLENAS JOROBADAS COPULA ENTRE BELUGAS ******************************************************************** COPULA ENTRE BALLENAS FRANCAS ver el video...+ ********************************************************************


-- VARAMIENTOS MASIVOS EN AZORES
I want to report an unusual situation occurred during the last week and a
half in S?o Miguel island, Azores, and ask for help in order to get some
clear conclusions.
During the last two weeks a total of 6 beaked whales stranded on this small
island, a really unusual fact. Of these 6 two were dead and 4 stranded alive
and returned to the open sea. From the first two animals (the dead ones) we
only can get one identification and it was a Cuvier's Beaked Whale, probably
an immature male. The other four animals stranded on a beach and they were
returned to the sea immediately by the lifeguards and the coastal guard, for
these reason we don't have a lot of information, but for the pictures they
send us probably were Sowerby's Beaked Whales, we only now that they
stranded alive and probably they were immature animals also, due to the body
lenght (about 3.5 meters).
We don't have any notice about military activities in the area, but is
really difficult to get this kind of information, for this reason i want to
ask you for help to find if there is any military or seismic prospection on
the area that could affect these animals.
Thanks for your help.
All the best,
Marc Fernandez Morron
Universidade dos A?ores



-We are looking for information on entanglement of dolphins in bottom trawl
lazy line.
In Israel the local bottlenose dolphins (Tursiops truncatus) are frequently
feeding behind bottom trawl boats. Unfortunately, during this interaction
some get by-caught, and of these, about a third get entangled in the lazy
line (lazy decky, hauling rope). Seemingly, as a result of playing and
rubbing against the rope, it gets bound around their body between the
flippers and the fluke, preventing their surfacing. Conservatism in fishing
methodology, has so far precluded gear modification. Lately, we have
accumulated enough cases to persuade Fishery Department officials to hold a
meeting on the problem. In preparation, we would have liked to come up with
some references from the Mediterranean Sea and elsewhere in the world, but
could not find much information about this in the literature. Is anyone
familiar with this problem and if and how was it solved?
We understand that there are a few ways in which the lazy line is being used
worldwide. The Israeli bottom trawl fleet is using a floating rope with
about 6-8 meters extra length, which is tied outside the net, between the
its wings and the cod end. A definite reply that this is not a problem with
the local fleet would also be much appreciated, but please refer to the way
the lazy line is being used in your area.
Thank you for your help.
Aviad Scheinin
scheinin@research.haifa.ac.il / scheinin@013.net.il
http://immrac.haifa.ac.il/
Chairman, IMMRAC - Israel Marine Mammal Research & Assistance center
Ph.D Student, Department of Maritime Civilizations, Haifa University.
The Recanati Institute for Maritime Studies, Haifa University Mount Carmel,
Haifa 31905 Israel
Home address: Tirat Shalom, P.B. 1356, Nes-Ziona 74052, Israel
Tel 972-8-9406584 Mobile 052-3571193 Fax: 972-4-8240493



-A pdf of the following paper is now available:
Respiratory Physiology & Neurobiology (in press).
Could beaked whales get the bends? Effect of diving behaviour and physiology on
modelled gas exchange for three species: Ziphius cavirostris, Mesoplodon
densirostris and Hyperoodon ampullatus.
Sascha K. Hooker (a), Robin W. Baird (b), Andreas Fahlman (c)
(a) Sea Mammal Research Unit, Scottish Oceans Institute, University of St
Andrews, St Andrews, Fife KY16 8LB, Scotland, United Kingdom
(b) Cascadia Research Collective, 218 1/2 West 4th Avenue, Olympia, Washington
98501, USA
(c) Biology Department, Mailstop 50, Woods Hole Oceanographic Institution,
Woods Hole, MA 02543, USA
Corresponding author: Dr. Andreas Fahlman (afahlman "at" whoi.edu)
DOI information: 10.1016/j.resp.2009.04.023
The pdf is available online at: http://dx.doi.org/10.1016/j.resp.2009.04.023
or via http://www.cascadiaresearch.org/Abstract:
A mathematical model, based on current knowledge of gas exchange and physiology
of marine mammals, was used to predict blood and tissue tension N2 (PN2) using
field data from three beaked whale species: northern bottlenose whales,
Cuvier's beaked whales, and Blainville's beaked whales. The objective was to
determine if physiology (body mass, diving lung volume, dive response) or dive
behaviour (dive depth and duration, changes in ascent rate, diel behaviour)
would lead to differences in PN2 levels and thereby decompression sickness
(DCS) risk between species. Diving lung volume and extent of the dive response
had a large effect on end-dive PN2. The dive profile had a larger influence on
end-dive PN2 than body mass differences between species. Despite diel changes
in dive behaviour, PN2 levels showed no consistent trend. Model output
suggested that all three species live with tissue levels that would cause a
significant proportion of DCS cases in terrestrial mammals. Cuvier!
's beaked whale diving behaviour appears to put them at higher risk than the
other species, which may explain their prevalence in strandings after the use
of mid-frequency sonar.
Keywords: Northern bottlenose whale; Cuvier's beaked whale; Blainville's beaked
whale; Decompression sickness; Diving physiology