On the Taxonomic Status of the Red Icefish Channichthys rugosus (Notothenioidei: Channichthyidae) from the Kerguelen Islands (South Ocean)

The presented work is the final part of the taxonomic revision of the Antarctic icefishes of the genus Channichthys Richardson, 1844 (Notothenioidei: Channichthyidae) from the Kerguelen Islands, the species composition of which was discussed until recently. Based on the morphological study of all available specimens from the ZIN and BMNH collections (including the holotype), a comprehensive redescription of the Red icefish Channichthys rugosus Regan, 1913 from the waters of the Kerguelen islands (South Ocean) was carried out, including external morphology, seismosensory system, gill apparatus, and axial skeleton. As a result, new diagnostic features of Red icefish were discovered and previously known ones were clarified, which made it possible to confirm the species validity. Comparison with other valid species icefishes was done. Channichthys rugosus differs from Ch. rhinoceratus Richardson, 1844 by a high anterior dorsal fin, the fin membrane of which reaches the apexes of its longest rays (does not reach in Ch. rhinoceratus), as well as a narrow and concave interorbital space (compared to the wider and flat one), by stronger granulation and a uniform reddish body color (dark spotted-marble in Ch. rhinoceratus). Channichthys rugosus differs from Ch. velifer Meissner, 1972 by the number of rays in the first dorsal fin (7–9 versus 9–12) and pectoral fin (18–20 versus 20–21), the presence of bone plaques in the proximal part of the medial lateral line (absent in Ch. velifer), and monochromatic reddish body coloration (spotted in Ch. velifer). Channichthys rugosus differs from Ch. panticapaei Shandikov, 1995 by the presence of only 1 row of gill rakers on the first gill arch (2 rows in Ch. panticapaei) and by light coloration (brownish-black in Ch. panticapaei).

First finding of a widely distributed Antarctic chiton species (Mollusca: Polyplacophora) in the North Pacific

For the first time, the widely spread Antarctic species Leptochiton antarcticus was found at the Emperor Seamounts in the North Pacific Ocean. In spite of a large distance between the Emperor Seamounts and Antarctica, the found specimen have very similar shell, girdle, radula and gill features to the type material. I propose that L. antarcticus spread to the North Pacific from the Antarctic via a deep-water current near the ocean floor, and perhaps it inhabits the slopes of islands and continents from the South Ocean to the Emperor Seamounts.

Zoning of waters in the Australian-New Zealand sector of the South Ocean by the example of distribution of pelagic ostracods from subclass Myodocopa

Distribution of mass antarctic, subantarctic, antarctic-subantarctic and tropical-subtropical interzonal pelagic ostracods is considered depending on structure and dynamics of waters in the Australian-New Zealand sector of the South Ocean on the base of authors’ and cited data. The species are separated latitudelly and vertically, that probably diminishes competition between them. Biogeographic boundaries of the subantarctic and antarctic zones determined by the ostracods distribution patterns are close to the South Polar and Subpolar Fronts.

Previsão Estatística da Precipitação Mensal para a Região Metropolitana do Recife (Statistical Prediction of Monthly Precipitation for the Recife Metropolitan Region)

Foi aplicado um modelo estatístico para observar a correlação das temperaturas da superfície do mar (TSM) nos oceanos pacífico (área dos niños) e Atlântico (áreas do DIPOLO (N-S), norte e sul) com as precipitações observadas durante os meses de abril, maio, junho e julho na Região Metropolitana do Recife (RMR), utilizando legs de 1, 2 e 3 meses. A maior correlação foi observada na precipitação do mês de julho, com as TSM observadas em todos os niños e nas áreas do DIPOLO e o setor norte do Atlântico. Com um r2 de 0,681. Abstract We applied a statistical model to observe the correlation of sea surface temperatures (SST) in the Pacific (area of niños) and Atlantic (areas DIPOLE (N-S), north and south) ocean with the observed rainfall during the months of April, May, June and July in the Metropolitan Region of Recife (MRR), using legs 1, 2 and 3 months. The highest correlation was observed rainfall in the month of July, with the SST observed in all areas of the niños and DIPOLE and the northern Atlantic. To a r2 of 0.681. Keywords: SST, Rainfall e Correlation