Article (Scientific journals)
Les stratégies de reproduction chez les poissons labridés méditerranéens
Ylieff, Marc
2000In Cahiers d'Ethologie, 20 (1), p. 113-138
Peer reviewed
 

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Keywords :
Mediterranean wrasse, behavioural ecology, reproductive strategies, alternative reproductive behaviour, mating systems, parental care.
Abstract :
[en] In contrast to tropical environments, Mediterranean fish assemblages have been exposed to greater seasonal fluctuations of climatic factors (water temperature, photoperiod), which have impacted more or less significantly on the biology of fish. The labrid fishes (wrasses) are good examples of how climatic changes influence behavioural strategies. The European wrasses differ mainly from the tropical ones by their particular reproductive behavioural patterns. In these wrasses, the variety of the reproductive strategies (hermaphroditism or gonochorism, spawning seasonality in open water or on substrates, degrees of parental care, etc.) make it possible to study the evolution of these strategies. If in tropics, most of wrasses exhibit planktonic spawning, the Mediterranean ones adapted their behaviour, developing modes of reproduction unusual in tropics: short periods of reproduction, spawning eggs on substrates or in elaborated nest, parental cares. This evolution is dictated, in particular, by the pressure of climatic factors, such as water temperature on the presence or the absence of parental care. Of the 21 Mediterranean species, almost all the species studied lay their eggs on substrates or in a nest built by the large territorial male. Only Coris julis, Thalassoma pavo and Xyrichthys novacula (protogynous hermaphroditism fishes) spawn in open water (planktonic spawning) as tropical species do. Moreover, the majority of Symphodus males have complex social structures where nesting territorial, satellite and sneaker males can be recognised. These sneakers adopt reproductive behavioural patterns known as alternative reproductive behaviour. They can either steal the spawn (streaking), or steal the female (sneaking). Finally, the majority of these Symphodus give parental care throughout each nesting cycle (2 to 5 nests are elaborated during the reproductive season in spring), which always comprises three phases: nest building phase (construction with alive algae of a substrate for spawning or a true nest in form of cup), sexual activity phase (the very moment the females come to spawn in the nest) and fanning phase (oxygenation of eggs, by the beat of the pectoral fins, until hatching). The diversity of the biological and behavioural adaptations developed by the numerous tropical and temperate species of labrid fishes allow us to consider the family as an ideal group to investigate various problems in behavioural ecology.
Disciplines :
Environmental sciences & ecology
Aquatic sciences & oceanology
Animal psychology, ethology & psychobiology
Author, co-author :
Ylieff, Marc ;  Université de Liège - ULiège > Département de Biologie, Ecologie et Evolution > Biologie du comportement - Ethologie et psychologie animale
Language :
French
Title :
Les stratégies de reproduction chez les poissons labridés méditerranéens
Alternative titles :
[en] Reproductive strategies in Mediterranean labrid fishes
Publication date :
2000
Journal title :
Cahiers d'Ethologie
ISSN :
0778-7103
Publisher :
Université de Liège. Institut de Zoologie, Liège, Belgium
Volume :
20
Issue :
1
Pages :
113-138
Peer reviewed :
Peer reviewed
Funders :
F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]
ULiège - Université de Liège [BE]
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