18 research outputs found
Biochemical comparison of two Hypostomus populations (Siluriformes, Loricariidae) from the AtlĂąntico Stream of the upper ParanĂĄ River basin, Brazil
Two syntopic morphotypes of the genus Hypostomus - H. nigromaculatus and H. cf. nigromaculatus (AtlĂąntico Stream, ParanĂĄ State) - were compared through the allozyme electrophoresis technique. Twelve enzymatic systems (AAT, ADH, EST, GCDH, G3PDH, GPI, IDH, LDH, MDH, ME, PGM and SOD) were analyzed, attributing the score of 20 loci, with a total of 30 alleles. Six loci were diagnostic (Aat-2, Gcdh-1, Gpi-A, Idh-1, Ldh-A and Mdh-A), indicating the presence of interjacent reproductive isolation. The occurrence of few polymorphic loci acknowledge two morphotypes, with heterozygosity values He = 0.0291 for H. nigromaculatus and He = 0.0346 for H. cf. nigromaculatus. FIS statistics demonstrated fixation of the alleles in the two morphotypes. Genetic identity (I) and distance (D) of Nei (1978) values were I = 0.6515 and D = 0.4285. The data indicate that these two morphotypes from the AtlĂąntico Stream belong to different species
Photography-based taxonomy is inadequate, unnecessary, and potentially harmful for biological sciences
The question whether taxonomic descriptions naming new animal species without type specimen(s) deposited in collections should be accepted for publication by scientific journals and allowed by the Code has already been discussed in Zootaxa (Dubois & NemĂ©sio 2007; Donegan 2008, 2009; NemĂ©sio 2009aâb; Dubois 2009; Gentile & Snell 2009; Minelli 2009; Cianferoni & Bartolozzi 2016; Amorim et al. 2016). This question was again raised in a letter supported
by 35 signatories published in the journal Nature (Pape et al. 2016) on 15 September 2016. On 25 September 2016, the following rebuttal (strictly limited to 300 words as per the editorial rules of Nature) was submitted to Nature, which on
18 October 2016 refused to publish it. As we think this problem is a very important one for zoological taxonomy, this text is published here exactly as submitted to Nature, followed by the list of the 493 taxonomists and collection-based
researchers who signed it in the short time span from 20 September to 6 October 2016
Fish, Taquara river basin, northern of the state of ParanĂĄ, Brazil.
Taquara River is situated in an agriculturist region, on the northern portion of the Tibagi river basin, state ofParanĂĄ. Fish fauna was collected in five stretches of the Taquara River and in nine headwaters of its tributaries, in theperiod of May to December 2006. Six orders, 22 families, and 74 species were collected, in a sum of 2,389 individuals.The orders Characiformes and Siluriformes were dominant
DATA MATRICES_Phylogeny of catfishes of the family Heptapteridae Gill, 1861 using ultraconserved elements (Teleostei, Siluriformes)
Original data and data partitions_Phylogeny of catfishes of the family Heptapteridae Gill, 1861 using ultraconserved elements (Teleostei, Siluriformes)</div