Fishes are attractive ! …
watching them swim is soothing to mind .. .. there are thousands of varieties
in the Sea, river, ponds and more .. this is more about Aquarium fish –
freshwater variety. In general, I have
seen – Guppies (with beautiful tail – some coloured); Mollies; Platys; Sword
tails; Barbs, Angel fish, Cichlids, Goldfish, Carp and the like .. .. was reading something on ‘Pacific Blue eyed fish’ and the
history behind this is amazing !
As the name
suggests, the fish’s eyes are a beautiful luminescent blue. Pacific Blue-eyes
are carnivorous fish, particularly suited for garden ponds and aquariums. Pacific Blue-eyes, like guppies, help control mosquitoes by feeding on the
larvae. Frog friendly – does not generally eat tadpoles. The Pacific Blue Eye has a semi-transparent
body that can vary in colour from pale olive, yellow to bluish. As the common
name suggests, the iris of the Pacific Blue Eye is blue. The operculum and
belly region are silvery. There is often a series of pearly spots along the
side of the body.
Charlotte of
Belgium (1840 – 1927) was a Belgian princess
who became Empress of Mexico when her husband accepted the Imperial Throne of
Mexico and reigned as Maximilian I of Mexico.
Maximilian I (Ferdinand Maximilian Joseph Maria was an Austrian archduke
who reigned as the only Emperor of the Second Mexican Empire from 10 April 1864
until his execution on 19 June 1867.
In
1867, Carlota left for Miramare,
Maximilian's castle near the Imperial Free City of Trieste in the Austrian
Littoral, an Austrian-ruled part of north-eastern Italy. On the journey there,
Carlota's mental health showed signs of worsening—passing by a farmer, she
became convinced that it was an assassin after her and persistently shouted at
her coachman to drive faster. She was seeking an audience with Pope Pius IX in Rome. On the way to Rome
she showed further signs of deteriorating mental health; she
felt unwell and insisted that it was due to being poisoned by spies and
traitors of Napoleon III among them. She
did meet Pope Pius IX but he was
reluctant to use his influence to intervene with Napoleon III on her empire's
behalf. She became despondent and distant thereafter, overwhelmed by despair
and paranoia, and remained within her hotel for the next two days. She stayed overnight in the Vatican, while she
rested, the Emperor of Austria and the
King of the Belgians sent delegations to Miramare Castle. The King sent Jan Frans Bulckens, a
Belgian psychiatrist, to his sister and a medical team decided that the empress
could not be told of the execution of her husband. With medical approval, Queen
Marie Henriette gave her sister-in-law a faked telegram from her husband to
come back to Brussels. Historians think
that after the death of the Emperor in Mexico, Charlotte only had the status of
a rich dowager.
Approximately
30,000 copies of Karl von Scherzer's book on the circumnavigation of the world
of the frigate Novara were sold, a huge number in that era. It is considered
the second most successful popular scientific work in the German language in
the 19th century; second only to Alexander von Humboldt's 5-volume Cosmography.
SMS Novara
was a sail frigate of the Austro-Hungarian Navy most noted for sailing the
globe for the Novara Expedition of 1857–1859 and, later for carrying Archduke
Maximilian and wife Carlota to Veracruz in May 1864 to become Emperor and
Empress of Mexico.
The circumnavigation of the earth from April 1857 to August 1859 by Novara was one of the most important journeys for what became the Naturhistorisches Museum in Vienna. A number of eminent natural scientists joined the voyage, including Georg Ritter von Frauenfeld, curator in the invertebrate department of the Imperial museums. The Natural History Museum Vienna is a large natural history museum located in Vienna, Austria, considered one of the most important natural history museums worldwide. The museum's 39 exhibition rooms cover 8,460 square meters and present more than 100,000 objects. It is home to 30 million objects available to more than 60 scientists and numerous guest researchers who carry out basic research in a wide range of topics related to human sciences, earth sciences, and life sciences.
The Pacific blue-eye
(Pseudomugil signifer) is a species of fish in the subfamily Pseudomugilinae
native to eastern Australia. Described by Austrian naturalist Rudolf Kner in
1866, it comprises two subspecies that have been regarded as separate species
in the past and may be once again with further study. It is a common fish of
rivers and estuaries along the eastern seaboard from Cape York in north
Queensland to southern New South Wales, the Burdekin Gap in central-north
Queensland dividing the ranges of the two subspecies. A small silvery fish
averaging around 3.25 cm in total length (1⅛–1⅜ in), the Pacific blue-eye is
recognisable by its blue eye ring and two dorsal fins. It forms loose schools
of tens to thousands of individuals. It eats water-borne insects as well as
flying insects that land on the water's surface, foraging for them by sight.
The Pacific blue-eye adapts readily to captivity.
Austrian naturalist Rudolf Kner described the species in 1866, from a specimen collected in Sydney in 1858
during the course of the Novara Expedition and taken to Vienna by the SMS
Novara. Variable
across its range, the Pacific blue-eye is considered to be a single species,
though it has been split by some into northern signata and southern signifer,
with the former found from Ross River northwards and the southern from the
Calliope River south. Within the
northern population, five distinct lineages (or subclades) have been
identified: one from Ross River and Herbert River, a second from Johnstone,
Barron and Tully Rivers, a third from Mulgrave/Russell River and Trinity Inlet,
a fourth from Daintree and Mossman Rivers and a fifth from Low Isles and Cape
Melville.
The Pacific blue-eye
generally reaches a total length of around 3–3.5 cm (1 1⁄8–1 3⁄8 in) long;
males can reach 8.8 cm (3 1⁄2 in) and females 6.3 cm (2 1⁄2 in). The
elongate body is partly transparent and pale yellow or olive with a silver
operculum and belly. The scales are relatively large and longer vertically than
horizontally. The eye is large and has a blue iris. There are two dorsal fins,
the first arising in line with or just posterior to the longest pectoral fin
ray. The forked tail fin has rounded tips.
The Pacific blue-eye is found from Narooma in southern New South Wales
north to the Rocky River in Cape York, though it is uncommon in eastern Cape
York. It lives in small, generally slow moving, streams to estuaries, as well
as dune lagoons and salt marshes. It is also found in brackish and marine
waters on some Queensland offshore islands such as Hinchinbrook Island, Lizard
Island, Low Island and Dunk Island.
It can also be found in tidal pools that
become isolated from rivers at low tide. The Pacific blue-eye also forages in
mangroves. These fishes are found in loose schools of tens to thousands of
fish. They can survive in a wide range
of water salinities from fresh-water to marine environments. It responds to
changes in salinity (and resulting change in buoyancy) by changing the volume
of its swim bladder, which takes up to 6 hours and 40 minutes when salinity is
reduced and around 5 hours when it is increased. In the meantime, the fish can
swim with a head-up or head-down posture, which either increases or decreases
buoyancy respectively. This adaptation helps the fish in the range of
salinities it encounters in its estuarine environment. In a school of Pacific blue-eyes that is
threatened, a few individuals accelerate and change direction, which initiates
an escape wave that spreads through the whole cohort.
Interesting !
With regards – S. Sampathkumar
5.1.2021.
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