New fish species in Pacific, Guyana, Brazil


This video is called Aquarium of the Pacific – Tropical Pacific Gallery (Part 3).

From Practical Fishkeeping:

Expeditions for two BBC documentaries have uncovered up to 15 new species [of] fish.

Dives down into the rarely explored ‘twilight zone’ of the Pacific Ocean uncovered thirteen new species during the filming of ‘Pacific Abyss‘.

Meanwhile, two species of fish believed to be new to science were discovered during an expedition into the Guyana rainforest, documented by the BBC in ‘Lost Land of the Jaguar’. …

Pacific Abyss …

Several more new Chromis species [apart from Chromis abyssus] have also been described from the expidition, along with at least one new species of Basslet (Plectranthias sp.), a hawkfish and a butterflyfish. …

Lost Land of the Jaguar

The largely undisturbed rainforest of Guyana was the location of BBC documentary Lost Land of the Jaguar. …

Among the new species candidates is a small banded characin (Hemiodus sp.), which was netted near the research teams’ base camp. A parasitic catfish of the genus Vandellia – to which the renown Candiru belong – was also discovered.

Candiru: here.

Also, in Brazil: New knifefish described.

South American electric knifefishes of the genus Archolaemus (Ostariophysi, Gymnotiformes): undetected diversity in a clade of rheophiles: here.

South American beetles pollinating Victoria amazonica, world’s biggest water lily


Victoria amazonica flowerFrom Annals of Botany:

The Role of Thermogenesis in the Pollination Biology of the Amazon Waterlily Victoria amazonica

ROGER S. SEYMOUR* and PHILIP G. D. MATTHEWS

Environmental Biology, University of Adelaide Adelaide, SA 5005, Australia

* For correspondence. E-mail roger.seymour@adelaide.edu.au …

• Background and Aims Several families of tropical plants have thermogenic flowers that show a 2-d protogynous sequence.

Most are pollinated by large beetles that remain for the entire period in the flowers, where they compete for mates and feed.

Active beetles require high body temperatures that they can achieve endogenously at great energy expense or attain passively and cheaply in a warm environment.

Floral heating is therefore hypothesized to be a direct energy reward to endothermic beetles, in addition to its accepted role in enhancing scent production.

• Methods This study measures the pattern of floral heat production (as temperature in 20 flowers and respiration rates in five flowers) in Victoria amazonica at field sites in Guyana and correlates floral temperatures with body temperatures necessary for activity in visiting Cyclocephala hardyi beetles.

From Biology News Net:

Smallest waterlily in the world brought back from the brink of extinction at Kew Gardens

May 20, 2010 12:31 AM

The Royal Botanic Gardens, Kew’s top propagation ‘code-breaker’, horticulturist Carlos Magdalena, has cracked the enigma of growing a rare species of African waterlily – believed to be the smallest waterlily in the world with pads than can be as little as 1cm in diameter – bringing it back from the brink of extinction; a fitting success story to celebrate International Day for Biological Diversity on 22 May 2010.

This ‘thermal’ waterlily (Nymphaea thermarum), so named because it grows in freshwater hot springs, was discovered in 1985 by German botanist Professor Eberhard Fischer of Koblenz-Landau University. It was endemic to just one known location in Mashyuza, Rwanda, in the south west of the country. However, it disappeared from this location about two years ago due to over-exploitation of the hot spring that fed its fragile habitat. Water was prevented from reaching the earth’s surface resulting in the desiccation of the few square metres where this species grew and no plant is known to have survived in the wild.

Luckily, Professor Eberhard Fischer realised that the species was in jeopardy and he transported a few specimens to Bonn Botanic Gardens soon after its discovery. At Bonn, horticulturists were successful at preserving these valuable specimens and indeed they lasted for more than a decade. However, the species proved extremely difficult to propagate.

As a result of a conservation plant exchange between Bonn and Kew, a handful of seeds and pre-germinated seedlings reached Kew in July 2009. All other known waterlily species start life as submerged plants until large enough to send pads to the surface. Therefore Nymphaea thermarum seedlings were initially grown submerged like any other waterlily. But, at both botanic gardens, this method was unsatisfactory: seedlings were barely clinging on to life and did not develop to adult stages.

Carlos, who has a track record of bringing the rarest and most difficult plants back from the brink, took on the challenge of learning the secrets of successfully propagating Nymphaea thermarum over many months.

He ran a series of trials involving a range of temperatures, water hardness, pH and depth. Plants grown in harder water at shallower depths seemed to develop further. However, no plant reached maturity, which was disappointing; as it seemed that every possible permutation known to have an influence on aquatic plant growth had been tested. Everything except the concentration of CO2 and other gases, such as O2, which are found in much smaller concentrations in water than in the air. Or, perhaps there was something crucial in the natural habitat of which he was not aware?

So the next step was clear: Carlos needed to start investigating ways to increase the carbon dioxide concentration in the water available to the plants whilst gathering information on the natural habitat.

Returning to the original German description of the species and its natural habitat supplied the final clue: “it grows in damp mud caused by the overflow of a hot spring. Water reaches the surface at 50C but the plant colonizes an area where the water has cooled to a temperature of 25C”. This meant that, unlike all other known waterlily species, Nymphaea thermarum did not grow submerged in the deep waters of lakes, rivers or marshes. The revelation was that this small, extremely rare and unusual species, with a spread of only 5 to 20cm, grows in the damp conditions at the edge of a thermal hot spring – and this was the vital clue needed to crack the code.

With this knowledge Carlos did one final trial. He placed seeds and seedlings into pots of loam within small containers filled with water, thus keeping the water at the same level as the surface of the compost, at a temperature of 25°C. In this way, the last remaining individuals of the species could be exposed to the higher concentrations of carbon dioxide and oxygen in the air. And to his surprise and joy, soon the plants started to improve and after a few weeks, eight plants began to flourish, growing to maturity with thicker, greener and wider leaves. In November 2009, Kew’s collection of Nymphea thermarum flowered for the first time.

Carlos Magdalena says,”When I received this donation from Bonn, I realised how important it was for the survival of the species to find a way of growing them successfully. At first they didn’t seem to respond to any of the traditional ways of treating these plants and they remained weak and failed to develop and eventually died. It was only when I searched a little deeper that the key I needed came to the surface. Now we have over 30 healthy baby plants growing here at Kew and some are producing seeds so soon we may have an army of these tiny waterlilies here at Kew. Its future in botanical collections seems secured for the long term.”

He adds, “Waterlilies are among the most ancient of flowering plants. This species could provide information about the evolution of flowering plants as it is truly unique. Our immediate priority is the ex situ conservation of the species and thereafter, if the natural flow of water in its historic location can be restored, plants grown at Kew can then be reintroduced into the wild. Also, this species may provide an opportunity to breed beautiful small and compact waterlily hybrids that don’t need a pond. Gardeners would love something like this, the advent of the ‘no-waterlily’.”

Professor Stephen Hopper, Director of the Royal Botanic Gardens, Kew says, “Kew is one of those places that offers a sense of hope in a time of relative doom and gloom about the state of the natural world, where individuals, by doing practical things with plants, can make a real difference to biodiversity conservation. Kew’s Breathing Planet Programme is about harnessing Kew’s horticultural and plant science expertise to support conservation around the world.”

He adds, “Waterlilies have long been associated with Kew – we have an entire glasshouse dedicated to them that is very popular with our visitors in the summer – and Kew was the first botanic garden to grow the giant waterlily, Victoria amazonica. Therefore, for Kew to pay a vital role in saving this tiny species of waterlily is truly thrilling. We hope in the near future it will be restored to its natural habitat and we will try to collect seeds for safekeeping in Kew’s Millennium Seed Bank and repatriation to Rwanda.

“The Nymphaea story also illustrates a broader biodiversity issue – the plight of ephemeral wetlands or temporary pools, on soil or rock, worldwide. Typically, these places are small in areal extent and often targeted for uses that threaten biodiversity. Yet seasonal wetlands often are richer in endemic species of plants and animals than ‘traditional’ wetlands of permanent water. Particularly in the face of global warming, it is vital for biodiversity conservation, and for human well-being in many places, that such seasonally wet havens are afforded every protection, and their biodiversity is nurtured back from the brink of extinction.”

Professor Eberhard Fischer, who discovered Nymphaea thermarum, says, “When I visited Kew earlier this year I couldn’t believe that Nymphaea thermarum, which we thought had gone extinct about two years ago, was thriving. These 30 plants were the last viable population of this species on the planet and thanks to the work done at Kew we have an opportunity to secure the future of this fascinating, little waterlily.”

On Saturday 22 May 2010 visitors to Kew Gardens will be able to see Nymphaea thermarum on display in the Secluded Glasshouse, along with other rare and endangered plants from Kew’s conservation nursery. Free guided tours – Biodiversity – what’s it all about? – will take place from 10am. Tours start at the Guides’ Desk, Victoria Plaza. See http://www.kew.org/events for tour times.

Visitors to Wakehurst Place in Sussex on Saturday 22 May will also be able to see a display of rare and endangered plants brought back from the brink of extinction thanks to the scientists from Kew’s Millennium Seed Bank and horticulturists from Wakehurst Place. These include Musa itinerans, the wild pink banana from China, that was the species chosen to represent the Millennium Seed Bank partnership reaching its target of banking 10% of the world’s wild plant species; the starved wood sedge (Carex depauperata), a rare UK native which is being reintroduced to SE England and Banksia brownii, a rare Australian species, saved in the Millennium Seed Bank, and also reintroduced to the wild.

Thanks to Carlos Magdalena’s breakthrough in propagating Nymphaea thermarum, Bonn Botanic Gardens have reported that they have now successfully started to propagate this plant too.

Source: Royal Botanic Gardens Kew

Bird-watching in Guyana


Red siskinFrom Stabroek News in Guyana:

Guyana impresses at British Bird-watching fair

Friday, September 1st 2006

A three-day British Bird-watching Fair hosted at Rutland Water, England in late August found the Guyana stand crowded by enthusiasts from around the world.

According to a press release from the Greenheart Trust participants at the Guyana booths displayed posters and leaflets that showcased far-flung birding destinations in the country, which were quickly pocketed by the visitors.

Indira Anandjit, president of the Guyana Tourism Authority (GTA) said, “The GTA is extremely pleased to be a partner and a part of the Greenheart Trust stand working together to promote Guyana” as the two groups share a common objective “to promote responsible eco-tourism and the preservation of Guyana’s magnificent natural and cultural heritage.”

Guyana participants included Diane McTurk of the Karanambu Trust, who gave a presentation on her twenty-year project based on the preservation of the giant otter in southern Guyana and Duane de Freitas of Rupununi Trails and the Dadanawa Ranch, who gave a slide presentation on the biodiversity of the Rupununi.

De Freitas’s presentation included photographs of the largest spider in the world and an image of an anaconda swallowing a seven-foot long boa constrictor which in turn had just swallowed a three foot iguana.

Additionally, representatives from the recently established South Rupununi Conservation Society which is described as a “grassroots indigenous organisation” devoted to the preservation of the Red Siskin and the maintenance of the cultural and environmental stability in the area participated and, Michael Lee, a representative from Rainforest Tours visited each stand to promote Guyana’s conservation organisations.

The release said the coastland bird checklist was prepared by Andy Narine of the Guyana Amazon Tropical Birds Society and the central Rupununi list was done by Kenneth Mandook of the Karanambu Ranch.

The Iwokrama checklist was particularly attractive as it was backed by displays of “the giants of El Dorado”- the harpy eagle, jaguar, giant anteater, arapaima, anaconda, black caiman, giant otter and the giant river turtle.

The release said the results of a survey that gauged visitor’s preference to travel to Guyana are to be published shortly.

Diane McTurk’s family is mentioned by Gerald Durrell in his Three singles to Adventure.

Wildlife and birds of Guyana: here. And here.

Birds in California: here.

Guyana: festive parrots nest in capital


Amazona festivaFrom BirdLife:

Festive boost for Georgetown

16-11-2005

The Guyana Amazon Tropical Birds Society has discovered a breeding pair of Festive Parrots Amazona festiva in the capital city of Georgetown, Guyana.

Georgetown is well known for its diverse bird life (199 recorded species), but this is the first time that the Festive Parrot has been recorded in the city.

The birds were discovered on 30 September by Andy Narine, the President of the Guyana Amazon Tropical Birds Society, nesting in the city’s Botanic Gardens.

There is no clear data on the population of these birds in Guyana and the Society is hoping to carry out more detailed study of the species.

In the meantime they will continue to monitor the health of the two Festive Parrots in the Botanic Gardens and record their behaviour.

Stamps on Pacific parrots and pigeons: here.