Changes in the fledging success over time with increasing population size in the Northern Lapwing Vanellus vanellus on Wangerooge Island (Lower Saxony, Germany)
- In this study, we report the results of a long-term investigation on changes in population size and fledging
success of Northern Lapwing on Wangerooge, a German Wadden Sea island. This population is increasing over a period
of 34 years in contrast to numerous populations in North-western Europe. The reproductive success however declines
over time and also with population density. Both effects cannot be considered separately due to autocorrelation.
However, it is noted that the population on Wangerooge is not sustained by local recruitment only. This outcome is
even more alarming as coastal areas and islands are considered as rare high quality meadow bird habitats. According
to the present results Wangerooge cannot be considered as a source habitat for Northern Lapwings in North-western
Breeding success of Black-tailed Godwits Limosa limosa under ‘mosaic management’, an experimental agrienvironment scheme in The Netherlands
- Black-tailed Godwits (Limosa limosa) have been declining for decades in The Netherlands and so far this has
not been slowed by conservation measures. A new form of agri-environment scheme was tried out in 2003-2005 at 6
sites where a ‘grassland mosaic’ (200-300 ha) was created by collectives of farmers through a diverse use of fields including
postponed and staggered mowing, (early) grazing, creating ‘refuge strips’ during mowing, and active nest protection.
We measured breeding success of godwits in each of the experimental sites and nearby, paired controls. Breeding
success was higher (0.28 chicks fledged /pair) in mosaics than in controls, but due to lower agricultural nest losses only.
Chick survival was 11 % in both mosaics and controls. The amount of late-mown and other grassland suitable for chicks
hardly differed between treatments during the fledging period, mainly due to rainfall delaying postponed mowing in
all sites. Chick survival was however positively correlated with site variation in the amount of high grass (>18 cm).
Breeding success was high enough to compensate for adult mortality (ca. 0.6) in only one mosaic site. Chick survival
was lower than in previous Godwit studies, indicating that additional loss factors have increased. Predation (50-80 % of
chicks, mostly by birds) is a candidate, but changes in the suitability of late-mown grassland (insect abundance and
sward density in grass monocultures) may also play a role. Consequently a higher management investment is needed
to achieve a self-sustaining population.
The importance of early breeding in Black-tailed Godwits (Limosa limosa)
- Human impacts on the landscape have increased the penalties for Black-tailed Godwits laying their eggs too late, especially in the very intensive agricultural landscapes of The Netherlands. Thus, godwits have experienced a dramatic change of their fitness landscape, because the advance in mowing date made late clutches worthless destroying either eggs or chicks. To determine the driving forces of the recent population decline we study the individual variation in timing of breeding with respect to reproductive success in a population unaffected by mowing. Our results show that even in a low intensity agricultural area it is very important for godwits to breed early in the season.
Chalcosicya maya n. sp, a new Mexican species (Coleoptera: Chrysomelidae: Eumoplinae) and its implications for morphology and biogeography
R. Wills Flowers
- Chalcosicya maya, new species, (Coleoptera: Chrysomelidae: Eumolpinae) is described and the species
key of Blake (1951) is modified to accommodate it. This is the first known mainland species of this previously
Antillean genus. Sclerotized rods in the apical segment of the ovipositor of Chalcosicya Blake and related genera
are shown to be useful systematic characters within the eumolpine tribe Adoxini. Relationships with other genera
suggest that Chalcosicya belongs to a clade derived from ancestors with a western Tethyian distribution.
Recognition of Chyrsobothris thoracica guadeloupensis Descarpentries, 1981 at the species level (Coleoptera: Buprestidae)
Norman E. Woddley
- Evidence is presented that the subspecies Chrysobothris thoracica guadeloupensis Descarpentries, 1981
(Coleoptera: Buprestidae) should be recognized at the species level. Character evidence is provided to separate C.
guadeloupensis, new status, from C. thoracica Fabricius, 1798. Both species are illustrated with habitus photographs
and images of the male genitalia.
New records of biting midges of the genus Culicoides Latreille from Mexico (Diptera: Ceratopogonidae)
M. Rodríguez Castrejón
William L Grogan Jr.
- We provide the first records of six species of biting midges (Diptera: Ceratopogonidae) in the genus
Culicoides Latreille from Mexico: C. baueri Hoffman, C. castillae Fox, C. debilipalpis Lutz, C. iriartei Fox, C. leoni
Barbosa and C. pusilloides Wirth and Blanton. In addition, C. leopoldoi Ortiz is confirmed from Mexico, and new
records are included for 25 other species previously recorded in Mexico: C. arubae Fox and Hoffman, C. blantoni Vargas
and Wirth, C. crepuscularis Malloch, C. daedalus Macfie, C. diabolicus Hoffman, C. foxi Ortiz, C. furens (Poey), C.
gabaldoni Ortiz, C. haematopotus Malloch, C. hylas Macfie, C. insignis Lutz, C. jamaicensis Edwards, C. luteovenus
Root and Hoffman, C. neopulicaris Wirth, C. nigrigenus Wirth and Blanton, C. pampoikilus Macfie, C. panamensis
Barbosa, C. paraensis (Goeldi), C. phlebotomus (Williston), C. poikilonotus Macfie, C. pusillus Lutz, C. stigmalis Wirth,
and all three species in the C. (Monoculicoides) variipennis complex, C. variipennis (Coquillett), C. occidentalis Wirth
and Jones, and C. sonorensis Wirth and Jones.
Tropidosteptes forestierae (Hemiptera: Heteroptera: Miridae: Mirinae): A New Species of Plant Bug Injuring Ornamental Florida Swampprivet, Forestiera segregata (Oleaceae), in South Florida
Thomas J. Henry
Doug L. Caldwell
Susan E. Halbert
- The mirine plant bug Tropidosteptes forestierae, new species (Hemiptera: Miridae) is described from
Collier County, Florida, where it was found causing serious injury to an extensive ornamental hedge of Florida swampprivet, Forestiera segregata (Jacq.) Krug and Urb. (Oleaceae). Adult male and female, fifth instar, and egg are described. Color images of the adults, nymph, egg, and injury; scanning photomicrographs of selected adult structures; and illustrations of male genitalia are provided. A key to help distinguish the 16 species of Tropidosteptes known to occur in the southeastern United States is given.
A new species of Chrysina Kirby (Coleoptera: Scarabaeidae: Rutelinae) from Oaxaca, Mexico
José Monzón Sierra
- Chrysina arellanoi new species (Coleoptera: Scarabaeidae: Rutelinae) is described from the southernmost
part of the Sierra Madre del Sur in Oaxaca, Mexico
First record of Megischus brunneus Cresson, 1865 (Hymenoptera: Stephanidae) from Hispaniola, the Antilles
Julio A. Genaro
- The occurrence of Megischus brunneus Cresson (Hymenoptera: Stephanidae) is recorded for the first time
from Hispaniola, the Antilles. The species was previously known from southern Florida and Cuba. This finding further
demonstrates the similarities between the Cuban and Hispaniolan biota.
Taxonomic notes on Onthophagus (Palaeonthophagus) lemuroides d’Orbigny, 1898 and O. (P.) fortigibber Reitter, 1909 (Coleoptera: Scarabaeidae: Scarabaeinae: Onthophagini)
- The taxonomic position of Onthophagus (Palaeonthophagus) lemuroides d’Orbigny, 1898 and Onthophagus
(Palaeonthophagus) fortigibber Reitter, 1909 is discussed (Coleoptera: Scarabaeidae: Scarabaeinae: Onthophagini).
A key to the species is given. Photos of type specimens of the two taxa and significant chromatic varieties, and
drawings of aedeagi are presented.