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Mogelijk weer Chilatherina sentaniensis in het wild gevangen (2016)

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Mogelijk weer Chilatherina sentaniensis in het wild gevangen (2016)
« Gepost op: mei 20, 2016, 06:00:45 pm »
 

HayoAqua

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[...]

But since 1990, the rainbow fish Lake Sentani is hard to find to many people expect it to have become extinct.

[...]

The 27 April until May 6, 2016 and then, Kadarusman together a number of researchers on an expedition to Lake Sentani Sentani to search for the missing rainbow.

In the study in collaboration with the Research and Development of Regency Jayapura (Jayapura Balitbangda), the team conducted sampling at 44 points, collected more than 662 specimens.

The team managed to collect fish believed to be Chilatherina sentaniensis. "Most likely the species was rediscovered through this expedition," said Kadarusman.

Kadarusman said, rainbow fish Lake Sentani have a mouth snout that is longer than the other species.

Based on the analysis done faster, Kadarusman believes that successful species he collected was a long rainbow fish could not be found.

"But the problem is, Chilatherina sentaniensis very similar to other fish of the genus. We have to do a specific morphological and molecular analysis to confirm," said Kadarusman to Kompas.com, Monday (09/05/2016).

[...]

Google Translate van http://sains.kompas.com/read/2016/05/09/19095301/Mencari.Pelangi.Sentani.yang.Hilang.?utm_campaign=related&utm_medium=bp-kompas&utm_source=news&/
 

Re: Mogelijk weer Chilatherina sentaniensis in het wild gevangen (2016)
« Reactie #1 Gepost op: juni 17, 2016, 11:33:03 am »
 

HayoAqua

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Update van de website van Adrian R. Tappin:

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Chilatherina sentaniensis is listed as a threatened species according to the IUCN Red List because of habitat degradation and the introduction of exotic species into Lake Sentani. The species was reported to occur only in Lake Sentani and its tributaries. Chilatherina sentaniensis were found in one of the tributaries of Lake Sentani (Jembatan II Creek), around 12 km southwest of Jayapura until approximately the early-2000s, when the habitat became polluted as a result of small-scale gold mining in its headwaters. Then in 2006, they were found in another tributary (Mekaye Creek) around 14 km east of Jayapura. However, in more recent times, surveys have failed to find the species in these locations. It is likely that habitat degradation is the cause. It was therefore believed that Chilatherina sentaniensis may be extinct in Lake Sentani (Ohee 2013). Nevertheless, more recent surveys at 38 sampling sites around the shores of Lake Sentani, and the river systems in the vicinity of the Cyclops Mountains, found Chilatherina sentaniensis at 15 locations within Lake Sentani and its tributaries. In addition to finding Chilatherina sentaniensis, the survey also recorded new records for Melanotaenia affinis in the river systems in the vicinity of the Cyclops Mountains (Kadarusman et al., 2016).

http://rainbowfish.angfaqld.org.au/Sentani.htm
 

Re: Mogelijk weer Chilatherina sentaniensis in het wild gevangen (2016)
« Reactie #2 Gepost op: juni 17, 2016, 11:35:34 am »
 

HayoAqua

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Filmpje van Kadarusman over de expeditie: https://www.youtube.com/watch?v=z7ye3poRU9g
 

Re: Mogelijk weer Chilatherina sentaniensis in het wild gevangen (2016)
« Reactie #3 Gepost op: juni 17, 2016, 11:36:06 am »
 

HayoAqua

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Reactie van Johannes Graf op Facebook:

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Seems that was a nice trip. M. affinis was described from Lake Sentani (Yafuri Outlet) by Weber (1908). M. affinis is known for many years from several places around Lake Sentani. So the new record of M. affinis from a creek coming down from Cyclops Mountains is no surprise and only one of several places where this species can be found. To date only C. fasciata is known from the lake, C. sentaniensis was known only from one location (Jembatan Dua) and has not been found for about 20 years. To prove the rediscovery of C. sentaniensis, in particular from different locations, I would like to see a comparisation of the samples under the morphological features defined in the original descriptions of C.fasciata (Weber, 1913) and C. sentaniensis (Weber, 1907).