ZIB

Treffer pro Seite

Treffer 1 - 2 | 2 Treffer

Sortierung

Digitale Medien

Ovarian development rates in the Old World screw-worm fly, Chrysomya bezziana (1991)

Spradbery, J. P. ; Vogt, W. G. ; Sands, D. P. A. ; [weitere]

Springer

Entomologia experimentalis et applicata 58 (1991), S. 261-265

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 1570-7458

Schlagwort(e): Chrysomya bezziana ; screw-worm fly ; development rates ; reproductive age

Quelle: Springer Online Journal Archives 1860-2000

Thema: Biologie

Notizen: Abstract Rates of ovarian development in relation to temperature were determined for autogenous females of the screw-worm fly, Chrysomya bezziana. Percentage durations of the different ovarian stages (scaled 2–10) were estimated on the basis of observed lengths of the developing oocytes. Mean durations (h) of each ovarian stage was determined at 20, 25, 28 and 35°C. A model of ovarian development rate (%/d) in relation to temperature (T) is presented, the fitted curve being give by R(T)=EXP (−2.73+0.362T−0.0055T2).

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00366140

Permalink

Bibliothek	Standort	Signatur	Band/Heft/Jahr	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

Digitale Medien

Queen brood reared in worker cells by the social wasp,Vespula germanica (F.) (Hymenoptera: Vespidae) (1993)

Spradbery, J. P.

Springer

Insectes sociaux 40 (1993), S. 181-190

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 1420-9098

Schlagwort(e): Cells ; queens ; caste differentiation ; queen control ; Vespula

Quelle: Springer Online Journal Archives 1860-2000

Thema: Biologie

Notizen: Summary The rearing of queen brood from worker cells in the nests ofVespula germanica (F.) in Australia was found at all stages of the colony cycle from early summer to autumn. Worker cells used to rear queens were 17% wider at their open ends than cells used for worker production, and in all other respects their dimensions were greater. The volume of a worker cell used for queen nearing was 21% larger than cells used for rearing workers but half the volume of a normal queen cell. Queen pupae reared in worker cells were significantly smaller than those reared in queen cells of the same nest. The spatial distribution of queen pupae in worker comb tended to be random although some evidence of nonrandom clustering was noted. The significance of this phenomenon is discussed in relation to caste differentiation and queen-control of gyne initiation and production. It is concluded that the phenomenon is neither seasonal nor due to some intrinsic component of the colony's annual cycle, and that it is unlikely to be an emergency queen-rearing response. Development of queens in worker cells may have occurred during favourable feeding regimes, perhaps determined by the benign Australian environment.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF01240706

Permalink

Bibliothek	Standort	Signatur	Band/Heft/Jahr	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

Treffer 1 - 2 | 2 Treffer