1,720,958 research outputs found
Notes on the Gracious Sea Urchin Tripneustes gratilla (Echinodermata: Echinoidea) in Pag-asa Island, Kalayaan, Palawan, Philippines
No full textThe Gracious Sea Urchin Tripneustes gratilla is one of the most heavily exploited sea urchins in the Philippines. However, knowledge about its status in Palawan especially in Pag-asa Island, Kalayaan is wanting. The study was conducted to determine the size structure, population density and test diameter-weight relationship of T. gratilla in Pag-asa Island, Kalayaan. Transect surveys at the intertidal area of the island revealed an average density of 3,500 ind.ha-1. The test diameter ranged between 2.6 and 8.8 cm, and body weight ranged between 8 and 248 g. Other than T. gratilla, four other echinoid species were recorded but in very less number. While it appears that T. gratilla is under exploited in Pag-asa Island, policies affecting its sustainable utilization are suggested.PublishedReferee
An annotated checklist of fish species described from the Philippines
No full textVolume: 1246Start Page: 1End Page: 28
Toxicity of dispersed oil on Gold–saddle rabbitfish Siganus guttatus fry
No full textThe acute toxicity of dispersant Mardeus-455 added to water accommodated fractions (WAF) were evaluated in Gold-saddle rabbitfish Siganus guttatus fry after 72 h exposure under laboratory conditions. Mortalities of fry exposed to different concentrations of dispersed oil were recorded every hour for the first 6 h, every 3 h for the next 12 h, and every 6 h thereafter. Results showed that the higher the ratio of dispersant and WAF, the higher the mortality of the rabbitfish fry which may be due to the enhanced availability of polyaromatic hydrocarbons (PAH). The LC50 was computed at 3.692% of the oil volume. The application of dispersant in cleaning oil spills must be limited to reduce its harmful effect in the marine environment. Assessing toxicity of dispersed oil in fish fry may help understand the extent of environmental damage after cleaning oil spill using dispersant.PublishedReferee
Występowanie gatunku Taractichthys steindachneri (Döderlein, 1883) w wodach na wyspie Palawan oraz informacje na temat połowów ryb z rodziny Bramidae na Filipinach
Get PDFDeep-sea species, although bizarre and odd-looking organisms, also warrant scientific and conservation attention. However, information on their occurrence and fishery throughout their distribution remains limited, hindering the development of effective conservation strategies. This paper contributes to addressing this gap by providing information on the occurrence of Sickle Pomfret Taractichthys steindachneri (Döderlein, 1883) in Palawan waters and notes on pomfret fishery in the Philippines. Two individuals were encountered for sale at the Puerto Princesa City New Public Market on 26 February 2023 and were photographed alongside a size reference. Standard (SL) and total lengths (TL) were measured using CPCe software, revealing significant sizes - 538.1 mm SL and 683.6 mm TL for the first individual, and 574.0 mm SL and 741.1 mm TL for the second, exceeding the previously recorded maximum lengths. Molecular sequencing further validated the species’ identity. Although seldom observed in the markets, the species are caught in deep trenches of the Sulu and West Philippine seas. In total, eight pomfret species are recorded in the Philippines, however, comprehensive information on the catch volume, fishing grounds, and other biological attributes of these species are needed to promote sustainable utilization and management.Przy całym swoim dość dziwacznym wyglądzie, gatunki głębinowe, warte są uwagi naukowców i ochrony. Jednak informacje na temat ich występowania i połowów pozostają nadal ograniczone, co utrudnia opracowanie skutecznych strategii ochrony tych zwierząt. Niniejszy artykuł przyczynia się do wypełnienia tej luki, dostarczając informacje na temat występowania gatunku Taractichthys steindachneri (Döderlein, 1883) w wodach wokół wyspy Palawan oraz na temat połowów ryb z rodziny Bramidae na Filipinach. 26 lutego 2023, sfotografowano i opatrzono informacją o rozmiarach dwa osobniki wystawione na sprzedaż na targu w mieście Puerto Princesa. Standardową (SL) i całkowitą długość (TL) ryb zmierzono za pomocą oprogramowania CPCe. Uzyskane wartości, odpowiednio 538,1 mm SL i 683,6 mm TL dla pierwszego osobnika oraz 574,0 mm SL i 741,1 mm TL dla drugiego, przekroczyły dotychczas zarejestrowane maksymalne długości. Zastosowane metody genetyczne potwierdziły identyfikację gatunku. Chociaż rzadko spotykane na targach, gatunki z rodziny Bramidae są łowione w głębokich rowach mórz Sulu i Zachodnich Filipin. Ogółem na Filipinach odnotowano osiem gatunków z rodziny Bramidae, jednak w celu zapewnienia zrównoważonego połowu i zarządzania potrzebne są szczegółowe informacje na temat wielkości połowów, łowisk oraz cech biologicznych tych gatunków
Description of a new uniformly brown estuarine moray eel (Anguilliformes, Muraenidae) from the Central Indo-Pacific Ocean
No full textVolume: 1220Start Page: 15End Page: 3
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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