NOTES ON THE ETYMOLOGIES IN PLATO'S CRATYLUS

Recent scholarship on Plato's Cratylus (= Cra.) has yielded interpretations that assign various functions of philosophical importance to the dialogue's lengthy etymological section. Barney (2001) considers the section an ‘agonistic display’ (69–73) in which Socrates beats contemporary practitioners of etymology at their own game while, at the same time, offering a cosmological theory intended for serious intellectual competition. In this context, Barney emphasizes the importance of Parmenides, a charioteer who journeys towards Truth, as a literary point of reference for Socrates’ own etymological quest after the true meaning of names which, from Cratylus’ naturalist perspective on language, are considered indicative of their referents’ essential nature. The contents of the etymologies may be a ‘rational reconstruction’ (52–7) of Cratylus’ linguistic naturalism. Sedley (2003) stresses the encyclopedic character of Socrates’ lexical interpretations and argues that these are ‘exegetically correct’ (28) in representing the opinions of the name-givers of old who subscribed to a Heraclitean view of a world in flux, as is reflected in the original form of the names they devised. Ademollo (2011) stresses that Socrates’ etymologies display the evolution of Greek intellectual thought, shown to be heavily reliant on the assumption of a universe in flux, and serve to exhibit the weaknesses in Cratylus’ naturalist view of language.

Pair formation, home range, and spatial variation in density, size and social status in blotched foxfaceSiganus unimaculatuson an Okinawan coral reef

The present study examined pair formation, spatial pattern of home range and spatial variation in density, size and social status of blotched foxfaceSiganus unimaculatus(family Siganidae) on an Okinawan coral reef. Of 32 pairs sampled for sexing, 31 (96.9%) were heterosexual and showed size-assortative pairing. Developed ovaries were found in April and July, whereas oocytes were immature in August, September and February. Heterosexual pairing was found in both reproductive and non-reproductive periods. Home range size tended to be positively related to fork length (FL). The degree of home range overlap for same size class pairs was smaller than that for different size class pairs. The intraspecific behavior when two pairs approached each other was categorized as ‘attack,’ ‘agonistic display’ and ‘no interactions,’ and the frequency of agonistic behaviors (“attack” or “agonistic display”) was significantly greater than “no interactions.” Underwater observations at a seagrass bed, a rocky reef flat and a sheltered reef slope revealed that the mean FL was significantly smaller at the sheltered reef slope (4–13 cm) than at the rocky reef flat (>13 cm). No individuals were found in the seagrass bed. Most individuals less than 6 cm FL were solitary, whereas most individuals over 7 cm FL were paired. Density was significantly greater on the sheltered reef slope than on the rocky reef flat.

The recently described parasitoid braconid wasp, Napo townsendi (Hymenoptera: Braconidae: Euphorinae: Dinocampini), forms leks and deters predators in the Ecuadorian cloud forest

In the Ecuadorian cloud forest, males of the parasitoid braconid waspNapo townsendiShaw displayed facultative lekking, appearing both singly and in groups of 2–7 on the leaf tops of various plant species. To attract females, they constantly employed a stereotypical, spread-winged calling behaviour, apparently releasing a sex pheromone combed from the lateral metasomal exocrine glands and applied to the wings and hind legs. Aggregated males used the same posture in conspecific agonistic displays, often leading to physical fighting. While female wasps were attracted to and mated with displaying singletons, they also made a choice among aggregated males. When females approached, males vibrated their wings in a brief courtship and mounted. Details of copulation behaviour, which lasted on an average of 3–4 min, are described. Without apparent physical weaponry, the displaying wasps successfully warded off attacks from an assortment of predatory arthropods, particularly salticid spiders. We present case studies of repeated unsuccessful predation attempts by salticids. Here, we postulate that calling and release of sex pheromone may double as both an intrasexual agonistic display and an aposematic advisory to predators that the wasps employ a chemical defence.

Agonistic behaviour in final-instar larvae of Agriocnemis pygmaea (Odonata : Coenagrionidae)

Larval agonistic displays are reported from Agriocnemis pygmaea, a small coenagrionid damselfly. Twenty-five major displays were distinguished. The behavioural repertoire of A. pygmaea is broadly consistent with published information on other coenagrionid larvae. The 'abdomen lift' behaviour, largely restricted to smaller instars of other examined species, occurs with some frequency in final-instar A. pygmaea. The use of larval agonistic display characters in phylogenetic analysis is discussed.