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    On a female of Tremoctopus sp. (Octopoda: Tremoctopodidae) caught in the Sardinian Sea

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    Morphometric and biologic data on a maturing female of Tremoctopus sp. (Octopoda: Tremoctopodidae) from the Sardinian Sea are provided. Potential fecundity and oocytes size values, reported for the first time in the western Mediterranean Sea, have suggested a possible different reproductive investment between the two basins of the Mediterranea

    On the morphometric relationship between beaks and body size in Histioteuthis bonnellii (Férussac, 1835)

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    Six measurements of 109 beaks (59 males and 50 females) of Histioteuthis bonnellii (Cephalopoda: Histioteuthidae) caught in the south Sardinian waters were interrelated with the size (ML) of the specimens. In both sexes, respectively for upper and lower beaks, the lateral wall and the hood grew faster than other parts (e.g. the rostrum). The analysis of covariance showed different beaks in the two sexes (p<0.05

    On the growth rings on Histioteuthis bonnellii (Férussac, 1835) upper beaks

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    The concentric rings present in the internal lateral wall of upper beaks of 109 Histioteuthis bonnellii (Cephalopoda: Histioteuthidae) caught in the south Sardinian waters were counted. From 142 to 409 and from 176 to 437 rings were counted in males and females, respectively. No difference was found between the number of rings among sexes (p>0.05). One year life-span was estimated in both sexe

    Going Beyond Counting First Authors in Author Co-citation Analysis

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    The 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
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