Predation by Birds Affects Population Structure in Breeding Sand Goby, Pomatoschistus minutus, Males

Oikos ◽  
1992 ◽  
Vol 64 (3) ◽  
pp. 527 ◽  
Author(s):  
Kai Lindström ◽  
Esa Ranta ◽  
Kai Lindstrom
Keyword(s):  
Population Structure ◽  
Sand Goby ◽  
Pomatoschistus Minutus

scholarly journals Hurry-up and hatch: selective filial cannibalism of slower developing eggs

2008 ◽  
Vol 4 (2) ◽  
pp. 160-162 ◽  
Author(s):  
Hope Klug ◽  
Kai Lindström
Keyword(s):  
Egg Size ◽  
Adaptive Strategy ◽  
Filial Cannibalism ◽  
Sand Goby ◽  
Pomatoschistus Minutus ◽  
Fitness Consequences

Filial cannibalism (the consumption of one's own offspring) is thought to represent an adaptive strategy in many animals. However, little is known about the details of which offspring are consumed when a parent cannibalizes. Here, we examined patterns of within-brood filial cannibalism in the sand goby ( Pomatoschistus minutus ). Males spawned sequentially with two females, and we asked whether males cannibalized selectively with regard to egg size or the order in which eggs were received. Males preferentially consumed the larger eggs of the second female they spawned with. Because larger eggs took longer to hatch, and because female 2's eggs were up to 1 day behind those of female 1, such preferential cannibalism might allow males to decrease the time spent caring for the current brood and re-enter the mating pool sooner. More work is needed to understand the fitness consequences of such selective cannibalism.

scholarly journals Risk-sensitive mating decisions in a visually compromised environment

2009 ◽  
Vol 5 (5) ◽  
pp. 600-602 ◽  
Author(s):  
Bob B. M. Wong ◽  
Marja Järvenpää ◽  
Kai Lindström
Keyword(s):  
Visual Cues ◽  
Perca Fluviatilis ◽  
Reproductive Decisions ◽  
Sand Goby ◽  
European Perch ◽  
Pomatoschistus Minutus ◽  
Risk Sensitive ◽  
Risk Of Predation ◽  
Males And Females ◽  
Reproductive Activities

Reproductive activities are often conspicuous and can increase the risk of predation. Evidence suggests that individuals are capable of responding to predators in a risk-sensitive manner. However, most studies tend to consider only the predator-mediated responses of males and females in isolation and with little regard to differences in local environmental conditions. Here, we experimentally investigate the effects of environmental visibility (turbidity) and predation risk on reproductive decisions in the sand goby, Pomatoschistus minutus , when exposed to a visually oriented predator, the European perch, Perca fluviatilis . We found that gobies were more reluctant to spawn in the predator's presence, although larger males spawned sooner than smaller males. Interestingly, latency to spawning was unaffected by the visual environment, suggesting that gobies may be relying on non-visual cues under turbid conditions.

scholarly journals To see in different seas: spatial variation in the rhodopsin gene of the sand goby (Pomatoschistus minutus)

2009 ◽  
Vol 18 (20) ◽  
pp. 4227-4239 ◽  
Author(s):  
MAARTEN H. D. LARMUSEAU ◽  
JOOST A. M. RAEYMAEKERS ◽  
KEVIN G. RUDDICK ◽  
JEROEN K. J. VAN HOUDT ◽  
FILIP A. M. VOLCKAERT
Keyword(s):  
Spatial Variation ◽  
Sand Goby ◽  
Rhodopsin Gene ◽  
Pomatoschistus Minutus
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