Number of Pairs, Timing of Egg-Laying and Clutch Size in a Subalpine Sand Martin Riparia riparia Colony, 1968-1985

1986 ◽  
Vol 17 (3) ◽  
pp. 221 ◽  
Author(s):  
Soren Svensson
Keyword(s):  
Clutch Size ◽  
Egg Laying ◽  
Riparia Riparia ◽  
Sand Martin

scholarly journals Reproductive suppression in female cooperatively breeding cichlids

2008 ◽  
Vol 4 (6) ◽  
pp. 606-609 ◽  
Author(s):  
Dik Heg
Keyword(s):  
Clutch Size ◽  
Group Living ◽  
Egg Laying ◽  
Alloparental Care ◽  
Large Female ◽  
Egg Mass ◽  
Small Female ◽  
Reproductive Suppression ◽  
Cooperatively Breeding ◽  
Female Subordinate

Suppression by dominants of female subordinate reproduction has been found in many vertebrate social groups, but has rarely been shown experimentally. Here experimental evidence is provided for reproductive suppression in the group-living Lake Tanganyika cichlid Neolamprologus pulcher . Within groups of three unrelated females, suppression was due to medium- and small-sized females laying less frequently compared with large females, and compared with medium females in control pairs. Clutch size and average egg mass of all females depended on body size, but not on rank. In a second step, a large female was removed from the group and a very small female was added to keep the group size constant. The medium females immediately seized the dominant breeding position in the group and started to reproduce as frequently as control pairs, whereas clutch size and egg mass did not change. These results show that female subordinate cichlids are reproductively capable, but apparently suppressed with respect to egg laying. Nevertheless, some reproduction is tolerated, possibly to ensure continued alloparental care by subordinate females.

scholarly journals TAXONOMIC STRUCTURE OF NIDICOLE FAUNA IN THE NESTS OF THE SAND MARTIN (RIPARIA RIPARIA LINNAEUS, 1758) IN THE TERRITORY OF THE SARATOV REGION

2020 ◽  
Author(s):  
E.N. Kondratyev ◽  
Keyword(s):  
Climate Changes ◽  
Migratory Birds ◽  
Focal Point ◽  
Global Climate ◽  
Taxonomic Structure ◽  
Saratov Region ◽  
Global Climate Changes ◽  
Riparia Riparia ◽  
Blood Sucking ◽  
Sand Martin

Today, global climate changes are taking place, leading to changes in the habitats of many species, including organisms of epidemiological importance. The transfer of such organisms will primarily involve the blood-sucking parasites of migratory birds. The sand martin (Riparia riparia Linnaeus, 1758) is one of many migratory birds nesting in the Saratov region. In order to understand how much the species is involved in the transmission of infection and the creation of a new focal point of infection, it is necessary to establish the taxonomic structure of the nidicol fauna.

Bird services applicable to mine restoration: a case study of Sand Martin (Riparia riparia) burrow construction

2019 ◽  
Vol 161 (1) ◽  
pp. 243-255 ◽  
Author(s):  
Zoë Rohrer ◽  
Salvador Rebollo ◽  
Enrique Andivia ◽  
Carlos Rodríguez ◽  
Juan Franco
Keyword(s):  
Riparia Riparia ◽  
Sand Martin ◽  
Mine Restoration

scholarly journals Older birds have better feathers: A longitudinal study on the long-distance migratory Sand Martin, Riparia riparia

PLoS ONE ◽  
2019 ◽  
Vol 14 (1) ◽  
pp. e0209737 ◽  
Author(s):  
Tibor Szép ◽  
János Dobránszky ◽  
Anders Pape Møller ◽  
Gareth Dyke ◽  
Ádám Z. Lendvai
Keyword(s):  
Longitudinal Study ◽  
Long Distance ◽  
Riparia Riparia ◽  
Sand Martin

Annual variation in common eider egg size: effects of temperature, clutch size, laying date, and laying sequence

1995 ◽  
Vol 73 (9) ◽  
pp. 1579-1587 ◽  
Author(s):  
Gregory J. Robertson
Keyword(s):  
Clutch Size ◽  
Egg Size ◽  
Annual Variation ◽  
Size Variation ◽  
Egg Laying ◽  
Laying Date ◽  
Somateria Mollissima ◽  
Ambient Temperatures ◽  
Common Eiders ◽  
N 93

Annual variation in volumes of eggs laid by common eiders (Somateria mollissima sedentaria) nesting at La Pérouse Bay, Manitoba (58°43′N, 93°27′W), was studied over 3 years (1991–1993). Temperatures during the egg-laying period were higher in 1991 than in 1992 and 1993. However, the eiders began nesting in 1993 at the same time as in 1991, whereas in 1992 the eiders began laying approximately 2 weeks later. Eiders laid significantly smaller clutches in 1992 than in the other 2 years. Egg size did not correlate with clutch size or laying date in any year. However, eiders laid smaller eggs in 1992 and 1993 than in 1991. In five egg clutches, the pattern of intraclutch egg-size variation was different among years. The last laid eggs of five egg clutches were disproportionately smaller in 1992 and 1993 (cold years) than those laid in 1991. Minimum daily temperatures before the egg-laying period (during rapid yolk development) were positively correlated with egg size. However, this effect was not significant when year and egg sequence were controlled for. Egg-size variation was correlated with the overall ambient temperatures during the laying period, whereas annual clutch-size variation was correlated with laying date, suggesting that the proximate mechanisms affecting clutch and egg size are different.

Effects of clutch size and egg-laying order on the breeding success in the Little Tern Sterna albifrons on the Nakdong Estuary, Republic of Korea

Ibis ◽  
2008 ◽  
Vol 140 (3) ◽  
pp. 408-414 ◽  
Author(s):  
SOON-BOK HONG ◽  
YONG-TAE WOO ◽  
SEIGO HIGASHI
Keyword(s):  
Clutch Size ◽  
Breeding Success ◽  
Egg Laying ◽  
Republic Of Korea ◽  
Laying Order

Egg Data Slips: Are They Useful for Information on Egg-Laying Dates and Clutch Size?

The Condor ◽  
1987 ◽  
Vol 89 (2) ◽  
pp. 369 ◽  
Author(s):  
Douglas B. McNair
Keyword(s):  
Clutch Size ◽  
Egg Laying

scholarly journals Reproductive traits of the gray ratsnake Ptyas korros from three geographically distinct populations

2012 ◽  
Vol 58 (6) ◽  
pp. 820-827 ◽  
Author(s):  
Long-Hui Lin ◽  
Fei Mao ◽  
Ce Chen ◽  
Xiang Ji
Keyword(s):  
Clutch Size ◽  
Egg Size ◽  
Reproductive Output ◽  
Reproductive Traits ◽  
Egg Laying ◽  
Laying Date ◽  
Egg Mass ◽  
Size Number ◽  
Female Reproductive Traits ◽  
Clutch Mass

Abstract We collected gravid gray rat snakes Ptyas korros from three geographically distinct populations in China, Chenzhou (CZ), Jiangshan (JS) and Dinghai (DH), to study geographical variation in female reproductive traits. Egg-laying dates differed among the three populations such that at the most northern latitude egg-laying was latest, and earliest at the most southern lati-tutde. Clutch size, clutch mass, egg mass, egg shape, within clutch variability in egg sizes and relative clutch mass differed among the three populations, whereas post-oviposition body mass did not. Except for egg-laying date, none of the traits examined varied in a geographically continuous trend. CZ and DH females, although separated by a distance of approximately 1100 km as the crow flies, were similar in nearly all traits examined. JS females were distinguished from CZ and DH females by their higher fecundity (clutch size), greater reproductive output (clutch mass) and more rounded eggs. Our data do not validate the prediction that larger offspring should be produced in colder localities. The absence of an egg size-number trade-off in each of the three populations presumably suggests that P. korros is among species where eggs are well optimized for size within a population.

Effects of ectoparasites on the Sand Martin Riparia riparia nestlings

Ibis ◽  
1997 ◽  
Vol 139 (3) ◽  
pp. 494-496 ◽  
Author(s):  
MARIA ALICE SANTOS ALVES
Keyword(s):  
Riparia Riparia ◽  
Sand Martin
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