scholarly journals First successful reproduction of the Chinese striped-necked turtle Mauremys sinensis (Gray, 1834) in a European wetland

2021 ◽  
Vol 10 (3) ◽  
pp. 721-729
Author(s):  
Laura Di Blasio ◽  
Riccardo Santoro ◽  
Vincenzo Ferri ◽  
Corrado Battisti ◽  
Christiana Soccini ◽  
...  
Keyword(s):  
Successful Reproduction

scholarly journals Postweaning maternal care increases male chimpanzee reproductive success

2020 ◽  
Vol 6 (38) ◽  
pp. eaaz5746
Author(s):  
Catherine Crockford ◽  
Liran Samuni ◽  
Linda Vigilant ◽  
Roman M. Wittig
Keyword(s):  
Reproductive Success ◽  
Parental Investment ◽  
Maternal Care ◽  
Parental Loss ◽  
Male Reproductive Success ◽  
Complex Societies ◽  
Successful Reproduction ◽  
Using Data

Humans are unusual among animals for continuing to provision and care for their offspring until adulthood. This “prolonged dependency” is considered key for the evolution of other notable human traits, such as large brains, complex societies, and extended postreproductive lifespans. Prolonged dependency must therefore have evolved under conditions in which reproductive success is gained with parental investment and diminished with early parental loss. We tested this idea using data from wild chimpanzees, which have similarly extended immature years as humans and prolonged mother-offspring associations. Males who lost their mothers after weaning but before maturity began reproducing later and had lower average reproductive success. Thus, persistent mother-immature son associations seem vital for enhancing male reproductive success, although mothers barely provision sons after weaning. We posit that these associations lead to social gains, crucial for successful reproduction in complex social societies, and offer insights into the evolution of prolonged dependency.

scholarly journals A note on reproduction of Didelphis marsupialis in captivity

1983 ◽  
Vol 78 (4) ◽  
pp. 507-509 ◽  
Author(s):  
Maria de Fatima Dezonne Motta ◽  
João Carlos de Araujo Carreira ◽  
Antonia Maria Ramos Franco
Keyword(s):  
First Record ◽  
Successful Reproduction ◽  
In Captivity

Conditions leading to successful reproduction of Didelphis marsupialis in captivity are described. A trial involving four mating pairs which had been maintained at least four months in the laboratory resulted in three litters and one false pregnancy. This is, to our knowledge, the first record of successful breeding of this species in captivity.

scholarly journals Individual tracking reveals first breeding of Oriental Storks at age 2 years in the wild

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Anton Sasin ◽  
Anna Serdyuk ◽  
Baoguang Zhu ◽  
Qingshan Zhao
Keyword(s):  
River Basin ◽  
Wild Population ◽  
Sex Identification ◽  
Amur River Basin ◽  
Amur River ◽  
Field Verification ◽  
Successful Reproduction ◽  
In The Wild ◽  
Individual Tracking

AbstractIn this study, we report the first ever documented instances of attempted and successful reproduction (rearing two offspring) of Oriental Storks (Ciconia boyciana) at age 2 years in a wild population in the middle Heilongjiang-Amur River Basin in Russia, using a combination of GPS-GSM tracking, DNA sex identification and field verification.

scholarly journals Fitness of breeders in social Damaraland mole-rats is independent of group size

2021 ◽  
Author(s):  
Jack Thorley ◽  
Hanna Bensch ◽  
Kyle Finn ◽  
Tim Clutton-Brock ◽  
Markus Zöttl
Keyword(s):  
Reproductive Success ◽  
Group Size ◽  
Survival Rates ◽  
Group Living ◽  
Adult Survival ◽  
High Survival ◽  
Successful Reproduction ◽  
Related Group ◽  
Group Members ◽  
Using Data

Damaraland mole-rats (Fukomys damarensis) are usually viewed as an obligatorily group living eusocial species in which successful reproduction is dependent on reproductive altruism of closely related group members. However, the reproductive ecology of social mole-rats in their natural environment remains poorly understood and it is unclear to what extent successful reproduction is dependent on assistance from other group members. Using data from a 7-year field study of marked individuals, we show that, after dispersal from their natal group, individuals typically settled alone in new burrow systems where they enjoyed high survival rates, and often remained in good body condition for several years before finding a mate. Unlike most other eusocial or singular cooperative breeders, we found that Damaraland mole-rats reproduced successfully in pairs without helpers and experimentally formed pairs had the same reproductive success as larger established groups. Overall there was only a weak increase in reproductive success with increasing group size and no effect of group size on adult survival rates across the population. Juveniles in large groups grew faster early in life but their growth rates declined subsequently so that they eventually plateaued at a lower maximum body mass than juveniles from small groups. Taken together, our data suggest that the fitness benefits of group living to breeders are small and we suggest that extended philopatry in Damaraland mole-rats has evolved because of the high costs and constraints of dispersal rather than because of strong indirect benefits accrued through cooperative behaviour.

WHAT'S IN A TEXT?RECONSTRUCTING THE ROMAN REPUBLIC– APPROACHES AND AIMS ONCE AGAIN

2011 ◽  
Vol 54 (2) ◽  
pp. 115-124
Author(s):  
KARL-J. HÖLKESKAMP
Keyword(s):  
Roman Republic ◽  
Political Culture ◽  
Controversial Issues ◽  
Conceptual Frameworks ◽  
Political Class ◽  
Successful Reproduction ◽  
Methodological Approaches ◽  
New Look

Abstract In this rejoinder to Michael Crawford's critical (re)view (pp. 105–14) of Karl-J. Hölkeskamp's book Reconstructing the Roman Republic: An Ancient Political Culture and Modern Research (Princeton 2010), the author answers concrete criticisms, restates his most important positions, perspectives, and proposals on the topic, and gives a survey of possible theories and models, methodological approaches, and conceptual frameworks discussed at length in the book: concepts of ‘politics’, ‘policies’etc. and the overcoming of traditional ‘constitutionalist’ and ‘factionalist’ approaches in recent research; the concept of ‘political culture’ as a catalyst for a change of paradigm and the new look at rituals and other symbolic dimensions of politics; ‘culturalist’, sociological and comparative approaches to ‘city-statehood’ as well as some concrete controversial issues of his so-called ‘elitist’ view of the Roman republic, its political class and the foundations of its self-construction, legitimization, and successful reproduction.

Nutrition during Gestation in Relation to Successful Reproduction in Elk

1976 ◽  
Vol 40 (2) ◽  
pp. 330 ◽  
Author(s):  
E. Tom Thorne ◽  
Ron E. Dean ◽  
William G. Hepworth
Keyword(s):  
Successful Reproduction

Effects of a native crayfish (Orconectes virilis) on the reproductive success and nesting behavior of sunfish (Lepomis spp.)

2004 ◽  
Vol 61 (11) ◽  
pp. 2135-2143 ◽  
Author(s):  
Nathan J Dorn ◽  
Gary G Mittelbach
Keyword(s):  
Reproductive Success ◽  
Lepomis Macrochirus ◽  
Lepomis Gibbosus ◽  
Orconectes Virilis ◽  
Negative Effects ◽  
Fish Prey ◽  
Natural Lakes ◽  
Successful Reproduction ◽  
Young Of The Year ◽  
Native Crayfish

While crayfish are traditionally considered fish prey, they are capable of feeding on substrate-bound fish eggs and their introductions have been blamed for the decline in fish populations in Europe and North America. To investigate their potential effects on fish reproductive success we measured the effects of a native crayfish (Orconectes virilis) on the reproductive success of two substrate-nesting sunfish, pumpkinseed (Lepomis gibbosus) and bluegill (Lepomis macrochirus), in replicated pond experiments. Crayfish were observed feeding on eggs in both experiments. Crayfish presence delayed successful reproduction by pumpkinseeds in densely vegetated ponds, resulting in lower young-of-the-year biomass in ponds with crayfish. In the second experiment, with bluegills in less-vegetated ponds, crayfish prevented successful reproduction entirely. However, when we added crayfish-proof exclosures to the crayfish ponds late in the summer, bluegills located the crayfish-free habitat and successfully reproduced inside the exclosures (1 month after first successful reproduction in control ponds). The results of these experiments demonstrate the potential strong negative effects of crayfish on sunfish reproduction and suggest that the spatial distribution of crayfish and other egg predators may influence fish nesting behaviors and habitat choices. Further studies are needed to determine the magnitude of crayfish effects in natural lakes and ponds where sunfish and crayfish co-occur.

Flowering period is independent from successful reproduction in Erica gracilis L.

Euphytica ◽  
2018 ◽  
Vol 214 (2) ◽  
Author(s):  
Conny Tränkner ◽  
Anke Müller ◽  
Annette Hohe
Keyword(s):  
Flowering Period ◽  
Successful Reproduction
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