Microsatellite markers and multiple paternity in a paternal care fish, Hexagrammos otakii

Munehara, Hiroyuki; Takenaka, Osamu

doi:10.1007/s101640070007

Cited by 21 publications

(15 citation statements)

References 25 publications

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“…In fishes, alloparental care has been reported in the various species with paternal and biparental care (Thresher 1985;Yanagisawa and Ochi 1986; van den Berghe 1988; Wisenden and Keenleyside 1992;Munehara et al 1994;Munehara and Takenaka 2000).…”

Section: Introductionmentioning

confidence: 99%

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Mating system and kin relationship between adults and young in the shell-brooding cichlid fish Neolamprologus meeli in Lake Tanganyika

Sunobe

Munehara

2003

J Ethol

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Mating system and parental behavior of ten monogamous pairs and two polygynous groups of the Tanganyikan cichlid Neolamprologus meeli were observed in their natural habitat. The home ranges of males and females overlapped with each other. Most groups included one to six young. Paternal and maternal relationships were determined for 22 young from DNA microsatellite markers. Three types of kinship were found: (I) kinship to both the male and female; (II) kinship to females only; and (III) nonkinship to both sexes. In the groups with type II young, stepfathering or sneaking may have occurred. Type III young were larger than type I, suggesting that the former were of sufficient size to leave their birth nest and settle in the territories of foster parents. Both males and females drove out potential predators of young (including three species of Lepidiolamprologus ) as a parental behavior. Adults with type III young attacked approaching predators with as much frequency as those with type I young only, indicating that they provided alloparental care. Adults and young swam together, but, a significant difference existed in the frequencies of interactions between adults versus kin young and adults versus non-kin young. The results suggest that both adults and young recognized kin.

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Section: Introductionmentioning

confidence: 99%

“…Recently, the use of DNA microsatellite polymorphism as a genetic marker has been developed, providing an important method for clarifying fish reproductive ecology (Munehara and Takenaka 2000). The method has revealed multiple paternity in maternal mouth-brooding cichlids (Kellogg et al 1995;Parker and Kornfield 1996).…”

Section: Introductionmentioning

confidence: 99%

Mating system and kin relationship between adults and young in the shell-brooding cichlid fish Neolamprologus meeli in Lake Tanganyika

Sunobe

Munehara

2003

J Ethol

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“…The relatively high proportion of breeding males inside nesting colonies relative to outside the colonies is expected given that breeding males are known to aggregate in nesting colonies along the continental shelf (Lauth et al 2007b); however, the significance of the overall higher proportion of males to females is unknown. Alternative mating tactics are ubiquitous in nature (Taborsky et al 2008) and are used by at least six hexagrammids, including the Atka mackerel (Crow et al 1997;Munehara and Takenaka 2000;Munehara and Markevich 2003;King and Withler 2005;Canino et al 2010). Fishes using alternative mating tactics (usually males) have distinct phenotypes that provide some advantage for interloping and stealing fertilizations from an attendant territorial male during a spawning event (Taborsky 1994).…”

Section: Breeding Colorations and Behaviorsmentioning

confidence: 99%

Behavioral Ecology of Color Patterns in Atka Mackerel

et al. 2010

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The behavioral ecology of seasonal and ephemeral variations in color patterns of Atka mackerel Pleurogrammus monopterygius was investigated and is discussed relative to alternative mating tactics, reproductive condition, social status, and predation risk. Breeding males underwent a conspicuous seasonal color change during the mating and brooding period, resulting in one of two nuptial phenotypes. Type I males held and defended territories inside nesting colonies and had a uniform yellow coloration with a golden hue across the head and dorsum. Type II males were nonterritorial, hovered above the nesting colony, and attempted periodic forays into the nesting colony; their color was plain yellow with irregular dark blotches across the head and dorsum and a light patch on the nape. When displaced from their nests, type I males also showed dark blotches and a light patch on the nape, but these characteristics were less pronounced than those in type II males. The color of females and nonbreeding males was indistinguishable and exhibited little seasonal variation; however, females close to spawning showed an ephemeral darkening of the body with white spots and patches along the dorsum. Nonbreeding males and females undergoing diel migrations also showed the same pattern across the dorsum but without darkening. The overall mean ratio of males to females in the trawl‐sampled population was 1.22:1.00, of which 44.9% were females, 40% were nonbreeding males, 9.8% were intermediate males (with characteristics intermediate between those of breeding and nonbreeding males), and 5.3% were breeding males. The proportion of breeding males was 12 times higher inside nesting colonies than outside the colonies. The mean fork length (FL) of intermediate and breeding males was larger (by ≤1 cm) than that of females or nonbreeding males. Understanding the behavioral ecology of Atka mackerel is important to the development of a comprehensive ecological index for monitoring and assessing the reproductive health of Atka mackerel stocks.

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“…Generally, the pattern of paternity in a fish species depends upon sperm number and the timing and proximity of gamete release to viable eggs (e.g., Munehara and Takenaka 2000;Fitzpatrick and Liley 2008). However, in copulating fish sperm number may be the most decisive factors because spermatozoa are mixed in an ovarian cavity.…”

Section: Introductionmentioning

confidence: 99%

Sperm allocation pattern during a reproductive season in the copulating marine cottoid species, Alcichthys alcicornis

Munehara

Murahana

2010

Environ Biol Fish

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The sperm allocation pattern of a copulating marine cottid fish, Alcichthys alcicornis, was investigated. A total of 86 mating events using six males were conducted in aquarium tanks over 10 days, and in 36 of them, spermatozoa were collected using a false copulation method. Males released 3-8×10 8 spermatozoa in early events, with the number decreasing gradually during subsequent mating events. This sperm allocation was represented as an "early investment and tapering" pattern. It was discussed why males have significantly higher sperm release in early spawning events. The reproductive behavior consists of spawning and subsequent copulation. Spermatozoa have the ability to fertilize eggs from multiple clutches, and in earlier produced clutches the level of sperm competition should be relatively low. In addition, if early spawn happens to be the first spawn with a female, spermatozoa that are released into the water column after spawning are responsible for fertilizing the female's first clutch. The probability of this occurring should decrease dramatically as the season progresses, due to the highly synchronous seasonal spawning of females. All of these factors should select for high sperm numbers in early ejaculates. Based on such reproductive ecology of A.alcicornis we hypothesize that this sperm allocation pattern is an adaptive reproductive strategy in response to egg availability and sperm competition occurring within the ovarian cavity.

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Microsatellite markers and multiple paternity in a paternal care fish, Hexagrammos otakii

Cited by 21 publications

References 25 publications

Mating system and kin relationship between adults and young in the shell-brooding cichlid fish Neolamprologus meeli in Lake Tanganyika

Mating system and kin relationship between adults and young in the shell-brooding cichlid fish Neolamprologus meeli in Lake Tanganyika

Behavioral Ecology of Color Patterns in Atka Mackerel

Sperm allocation pattern during a reproductive season in the copulating marine cottoid species, Alcichthys alcicornis

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