Intrinsic differences between males and females determine sex-specific consequences of inbreeding

Ebel, Emily R.; Phillips, Patrick C.

doi:10.1186/s12862-016-0604-5

BMC Ecology and Evolution

Table 1 Summary of previous studies on sex-specific inbreeding depression. Only studies that quantified inbreeding depression comparably for both sexes are included

From: Intrinsic differences between males and females determine sex-specific consequences of inbreeding

Species	Vulnerable sex	Traits examined	Conclusions	Reference
Wild gourd	Female	Fruit and flower number, seed germination, pollen success	Female function requires more resources than male function	[53]
Morning glory	Female	Flower and seed number, survival	Different numbers of loci affecting fitness or different average contributions	[67]
Drosophila	Male	Larval-adult survival, female fecundity, male mating success	Inclusion of the opportunity for male-male competition increases differences in inbreeding depression among sexes	[11]
Drosophila	Male	Egg hatchability, larval-adult survival, female fecundity, male mating success	Sexual selection makes inbreeding more costly for males	[7]
Drosophila	Both	Egg-to-adult viability	No sex-specific inbreeding depression	[68]
Stalk-eyed flies	Male/Both	Eyespan, thorax length, wing length	Sexually-selected trait (eyespan) more sensitive in males; no sex-specific differences in other traits	[69]
Beetle	Female	Adult mortality	Sex-specific alleles involved in inbreeding depression; hemizygosity causes male-specific selection	[10]
Beetle	Male	Sexual odorant signaling	Odorant may be male-only sexually selected trait	[70]
Beetle	Male	Proportion of offspring in competitive environment	Males have greater reproductive variance; stressful environment amplifies inbreeding depression in males	[71]
Butterfly	Male	Fertility	Sex-specific alleles involved in inbreeding depression; “direct or indirect fertility selection…operating differentially among the sexes”	[72]
Hihi (bird)	Male*	Embryo/nestling mortality	Size dimorphism may increase inbreeding sensitivity; *lack of comparably inbred females may suggest elevated mortality	[73]
Takahe (bird)	Female	Fledgling success	Sex-effect explanation “currently unknown”	[74]
Song sparrow	Female	Offspring number and survival	Maternal effects increase female inbreeding sensitivity; reproductive ecology may decrease male sensitivity	[54]
Song sparrow	Female/ Male/Both	Immune response (3 types)	“not clear why inbreeding effects should differ between males and females”; perhaps sex-specific variation in life-history allocation or physiology	[75]
Japanese quail	Female	Hatching success, viability, fertility	Maternal effects; delay of sexual maturity in females	[52]
Great tit	Both	Hatching, fledging, and breeding success	No sex-specific inbreeding depression	[76]
Great tit	Female	Hatching success	Maternal effects increase female inbreeding sensitivity	[51]
Zebra finch	Both/Female	Body mass, tarsus length, wing length, fat	Most morphological traits show similar patterns of inbreeding depression; sex-specific traits also vunerable	[77]
Mouse	Male	Adult and offspring survivorship, male competitive ability	Sexual selection makes inbreeding more costly for males	[58]
Gazelle	Female	Longevity	Longer female lifespan is more sensitive to inbreeding depression	[78]

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ISSN: 2730-7182

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